The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.widget; |
| 18 | |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 19 | import android.annotation.IntDef; |
Siva Velusamy | 94a6d15 | 2015-05-05 15:07:00 -0700 | [diff] [blame] | 20 | import android.annotation.NonNull; |
Scott Kennedy | 3a1fa10 | 2015-03-05 19:15:11 -0800 | [diff] [blame] | 21 | import android.annotation.Nullable; |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 22 | import android.annotation.UnsupportedAppUsage; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 23 | import android.content.Context; |
| 24 | import android.content.res.TypedArray; |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 25 | import android.graphics.Canvas; |
| 26 | import android.graphics.drawable.Drawable; |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 27 | import android.os.Build; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 28 | import android.util.AttributeSet; |
| 29 | import android.view.Gravity; |
| 30 | import android.view.View; |
| 31 | import android.view.ViewDebug; |
| 32 | import android.view.ViewGroup; |
Siva Velusamy | 94a6d15 | 2015-05-05 15:07:00 -0700 | [diff] [blame] | 33 | import android.view.ViewHierarchyEncoder; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 34 | import android.widget.RemoteViews.RemoteView; |
| 35 | |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 36 | import com.android.internal.R; |
| 37 | |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 38 | import java.lang.annotation.Retention; |
| 39 | import java.lang.annotation.RetentionPolicy; |
| 40 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 41 | |
| 42 | /** |
Joe Fernandez | d9ffaa5 | 2017-04-25 23:39:17 -0700 | [diff] [blame] | 43 | * A layout that arranges other views either horizontally in a single column |
| 44 | * or vertically in a single row. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 45 | * |
Joe Fernandez | d9ffaa5 | 2017-04-25 23:39:17 -0700 | [diff] [blame] | 46 | * <p>The following snippet shows how to include a linear layout in your layout XML file:</p> |
Scott Main | 41ec653 | 2010-08-19 16:57:07 -0700 | [diff] [blame] | 47 | * |
Joe Fernandez | d9ffaa5 | 2017-04-25 23:39:17 -0700 | [diff] [blame] | 48 | * <pre><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" |
| 49 | * android:layout_width="match_parent" |
| 50 | * android:layout_height="match_parent" |
| 51 | * android:paddingLeft="16dp" |
| 52 | * android:paddingRight="16dp" |
| 53 | * android:orientation="horizontal" |
| 54 | * android:gravity="center"> |
| 55 | * |
| 56 | * <!-- Include other widget or layout tags here. These are considered |
| 57 | * "child views" or "children" of the linear layout --> |
| 58 | * |
| 59 | * </LinearLayout></pre> |
| 60 | * |
| 61 | * <p>Set {@link android.R.styleable#LinearLayout_orientation android:orientation} to specify |
| 62 | * whether child views are displayed in a row or column.</p> |
| 63 | * |
| 64 | * <p>To control how linear layout aligns all the views it contains, set a value for |
| 65 | * {@link android.R.styleable#LinearLayout_gravity android:gravity}. For example, the |
| 66 | * snippet above sets android:gravity to "center". The value you set affects |
| 67 | * both horizontal and vertical alignment of all child views within the single row or column.</p> |
| 68 | * |
| 69 | * <p>You can set |
Jeff Sharkey | 67f9d50 | 2017-08-05 13:49:13 -0600 | [diff] [blame] | 70 | * {@link android.R.styleable#LinearLayout_Layout_layout_weight android:layout_weight} |
Joe Fernandez | d9ffaa5 | 2017-04-25 23:39:17 -0700 | [diff] [blame] | 71 | * on individual child views to specify how linear layout divides remaining space amongst |
| 72 | * the views it contains. See the |
| 73 | * <a href="https://developer.android.com/guide/topics/ui/layout/linear.html">Linear Layout</a> |
| 74 | * guide for an example.</p> |
| 75 | * |
| 76 | * <p>See |
| 77 | * {@link android.widget.LinearLayout.LayoutParams LinearLayout.LayoutParams} |
| 78 | * to learn about other attributes you can set on a child view to affect its |
| 79 | * position and size in the containing linear layout.</p> |
Romain Guy | 9295ada | 2010-06-15 11:33:24 -0700 | [diff] [blame] | 80 | * |
| 81 | * @attr ref android.R.styleable#LinearLayout_baselineAligned |
| 82 | * @attr ref android.R.styleable#LinearLayout_baselineAlignedChildIndex |
| 83 | * @attr ref android.R.styleable#LinearLayout_gravity |
| 84 | * @attr ref android.R.styleable#LinearLayout_measureWithLargestChild |
| 85 | * @attr ref android.R.styleable#LinearLayout_orientation |
| 86 | * @attr ref android.R.styleable#LinearLayout_weightSum |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 87 | */ |
| 88 | @RemoteView |
| 89 | public class LinearLayout extends ViewGroup { |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 90 | /** @hide */ |
| 91 | @IntDef({HORIZONTAL, VERTICAL}) |
| 92 | @Retention(RetentionPolicy.SOURCE) |
| 93 | public @interface OrientationMode {} |
| 94 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 95 | public static final int HORIZONTAL = 0; |
| 96 | public static final int VERTICAL = 1; |
| 97 | |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 98 | /** @hide */ |
Jeff Sharkey | ce8db99 | 2017-12-13 20:05:05 -0700 | [diff] [blame] | 99 | @IntDef(flag = true, prefix = { "SHOW_DIVIDER_" }, value = { |
| 100 | SHOW_DIVIDER_NONE, |
| 101 | SHOW_DIVIDER_BEGINNING, |
| 102 | SHOW_DIVIDER_MIDDLE, |
| 103 | SHOW_DIVIDER_END |
| 104 | }) |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 105 | @Retention(RetentionPolicy.SOURCE) |
| 106 | public @interface DividerMode {} |
| 107 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 108 | /** |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 109 | * Don't show any dividers. |
| 110 | */ |
| 111 | public static final int SHOW_DIVIDER_NONE = 0; |
| 112 | /** |
| 113 | * Show a divider at the beginning of the group. |
| 114 | */ |
| 115 | public static final int SHOW_DIVIDER_BEGINNING = 1; |
| 116 | /** |
| 117 | * Show dividers between each item in the group. |
| 118 | */ |
| 119 | public static final int SHOW_DIVIDER_MIDDLE = 2; |
| 120 | /** |
| 121 | * Show a divider at the end of the group. |
| 122 | */ |
| 123 | public static final int SHOW_DIVIDER_END = 4; |
| 124 | |
| 125 | /** |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 126 | * Compatibility check. Old versions of the platform would give different |
| 127 | * results from measurement passes using EXACTLY and non-EXACTLY modes, |
| 128 | * even when the resulting size was the same. |
| 129 | */ |
| 130 | private final boolean mAllowInconsistentMeasurement; |
| 131 | |
| 132 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 133 | * Whether the children of this layout are baseline aligned. Only applicable |
| 134 | * if {@link #mOrientation} is horizontal. |
| 135 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 136 | @ViewDebug.ExportedProperty(category = "layout") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 137 | private boolean mBaselineAligned = true; |
| 138 | |
| 139 | /** |
| 140 | * If this layout is part of another layout that is baseline aligned, |
| 141 | * use the child at this index as the baseline. |
| 142 | * |
| 143 | * Note: this is orthogonal to {@link #mBaselineAligned}, which is concerned |
| 144 | * with whether the children of this layout are baseline aligned. |
| 145 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 146 | @ViewDebug.ExportedProperty(category = "layout") |
Karl Rosaen | c1f9c40 | 2009-08-12 17:18:33 -0700 | [diff] [blame] | 147 | private int mBaselineAlignedChildIndex = -1; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 148 | |
| 149 | /** |
| 150 | * The additional offset to the child's baseline. |
| 151 | * We'll calculate the baseline of this layout as we measure vertically; for |
| 152 | * horizontal linear layouts, the offset of 0 is appropriate. |
| 153 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 154 | @ViewDebug.ExportedProperty(category = "measurement") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 155 | private int mBaselineChildTop = 0; |
| 156 | |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 157 | @ViewDebug.ExportedProperty(category = "measurement") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 158 | private int mOrientation; |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 159 | |
Fabrice Di Meglio | bce84d2 | 2011-06-02 15:57:01 -0700 | [diff] [blame] | 160 | @ViewDebug.ExportedProperty(category = "measurement", flagMapping = { |
| 161 | @ViewDebug.FlagToString(mask = -1, |
| 162 | equals = -1, name = "NONE"), |
| 163 | @ViewDebug.FlagToString(mask = Gravity.NO_GRAVITY, |
| 164 | equals = Gravity.NO_GRAVITY,name = "NONE"), |
| 165 | @ViewDebug.FlagToString(mask = Gravity.TOP, |
| 166 | equals = Gravity.TOP, name = "TOP"), |
| 167 | @ViewDebug.FlagToString(mask = Gravity.BOTTOM, |
| 168 | equals = Gravity.BOTTOM, name = "BOTTOM"), |
| 169 | @ViewDebug.FlagToString(mask = Gravity.LEFT, |
| 170 | equals = Gravity.LEFT, name = "LEFT"), |
| 171 | @ViewDebug.FlagToString(mask = Gravity.RIGHT, |
| 172 | equals = Gravity.RIGHT, name = "RIGHT"), |
Fabrice Di Meglio | 9e3b002 | 2011-06-06 16:30:29 -0700 | [diff] [blame] | 173 | @ViewDebug.FlagToString(mask = Gravity.START, |
| 174 | equals = Gravity.START, name = "START"), |
| 175 | @ViewDebug.FlagToString(mask = Gravity.END, |
| 176 | equals = Gravity.END, name = "END"), |
Fabrice Di Meglio | bce84d2 | 2011-06-02 15:57:01 -0700 | [diff] [blame] | 177 | @ViewDebug.FlagToString(mask = Gravity.CENTER_VERTICAL, |
| 178 | equals = Gravity.CENTER_VERTICAL, name = "CENTER_VERTICAL"), |
| 179 | @ViewDebug.FlagToString(mask = Gravity.FILL_VERTICAL, |
| 180 | equals = Gravity.FILL_VERTICAL, name = "FILL_VERTICAL"), |
| 181 | @ViewDebug.FlagToString(mask = Gravity.CENTER_HORIZONTAL, |
| 182 | equals = Gravity.CENTER_HORIZONTAL, name = "CENTER_HORIZONTAL"), |
| 183 | @ViewDebug.FlagToString(mask = Gravity.FILL_HORIZONTAL, |
| 184 | equals = Gravity.FILL_HORIZONTAL, name = "FILL_HORIZONTAL"), |
| 185 | @ViewDebug.FlagToString(mask = Gravity.CENTER, |
| 186 | equals = Gravity.CENTER, name = "CENTER"), |
| 187 | @ViewDebug.FlagToString(mask = Gravity.FILL, |
| 188 | equals = Gravity.FILL, name = "FILL"), |
Fabrice Di Meglio | c46f7ff | 2011-06-06 18:23:10 -0700 | [diff] [blame] | 189 | @ViewDebug.FlagToString(mask = Gravity.RELATIVE_LAYOUT_DIRECTION, |
| 190 | equals = Gravity.RELATIVE_LAYOUT_DIRECTION, name = "RELATIVE") |
Jon Miranda | 4597e98 | 2014-07-29 07:25:49 -0700 | [diff] [blame] | 191 | }, formatToHexString = true) |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 192 | @UnsupportedAppUsage |
Fabrice Di Meglio | 9e3b002 | 2011-06-06 16:30:29 -0700 | [diff] [blame] | 193 | private int mGravity = Gravity.START | Gravity.TOP; |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 194 | |
| 195 | @ViewDebug.ExportedProperty(category = "measurement") |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 196 | @UnsupportedAppUsage |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 197 | private int mTotalLength; |
| 198 | |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 199 | @ViewDebug.ExportedProperty(category = "layout") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 200 | private float mWeightSum; |
| 201 | |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 202 | @ViewDebug.ExportedProperty(category = "layout") |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 203 | @UnsupportedAppUsage |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 204 | private boolean mUseLargestChild; |
| 205 | |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 206 | @UnsupportedAppUsage |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 207 | private int[] mMaxAscent; |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 208 | @UnsupportedAppUsage |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 209 | private int[] mMaxDescent; |
| 210 | |
| 211 | private static final int VERTICAL_GRAVITY_COUNT = 4; |
| 212 | |
| 213 | private static final int INDEX_CENTER_VERTICAL = 0; |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 214 | @UnsupportedAppUsage |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 215 | private static final int INDEX_TOP = 1; |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 216 | @UnsupportedAppUsage |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 217 | private static final int INDEX_BOTTOM = 2; |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 218 | private static final int INDEX_FILL = 3; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 219 | |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 220 | @UnsupportedAppUsage |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 221 | private Drawable mDivider; |
| 222 | private int mDividerWidth; |
| 223 | private int mDividerHeight; |
| 224 | private int mShowDividers; |
| 225 | private int mDividerPadding; |
| 226 | |
Selim Cinek | 78528b2 | 2015-06-02 17:33:09 +0200 | [diff] [blame] | 227 | private int mLayoutDirection = View.LAYOUT_DIRECTION_UNDEFINED; |
| 228 | |
Chet Haase | cb84888 | 2018-03-21 14:09:44 -0700 | [diff] [blame] | 229 | /** |
| 230 | * Signals that compatibility booleans have been initialized according to |
| 231 | * target SDK versions. |
| 232 | */ |
| 233 | private static boolean sCompatibilityDone = false; |
| 234 | |
| 235 | /** |
| 236 | * Behavior change in P; always remeasure weighted children, regardless of excess space. |
| 237 | */ |
| 238 | private static boolean sRemeasureWeightedChildren = true; |
| 239 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 240 | public LinearLayout(Context context) { |
Alan Viverette | d6479ec | 2013-09-10 17:03:02 -0700 | [diff] [blame] | 241 | this(context, null); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 242 | } |
| 243 | |
Scott Kennedy | 3a1fa10 | 2015-03-05 19:15:11 -0800 | [diff] [blame] | 244 | public LinearLayout(Context context, @Nullable AttributeSet attrs) { |
Romain Guy | 9295ada | 2010-06-15 11:33:24 -0700 | [diff] [blame] | 245 | this(context, attrs, 0); |
| 246 | } |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 247 | |
Scott Kennedy | 3a1fa10 | 2015-03-05 19:15:11 -0800 | [diff] [blame] | 248 | public LinearLayout(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { |
Alan Viverette | 617feb9 | 2013-09-09 18:09:13 -0700 | [diff] [blame] | 249 | this(context, attrs, defStyleAttr, 0); |
| 250 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 251 | |
Alan Viverette | 617feb9 | 2013-09-09 18:09:13 -0700 | [diff] [blame] | 252 | public LinearLayout(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| 253 | super(context, attrs, defStyleAttr, defStyleRes); |
| 254 | |
Chet Haase | cb84888 | 2018-03-21 14:09:44 -0700 | [diff] [blame] | 255 | if (!sCompatibilityDone && context != null) { |
| 256 | final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; |
| 257 | |
| 258 | // Older apps only remeasure non-zero children |
| 259 | sRemeasureWeightedChildren = targetSdkVersion >= Build.VERSION_CODES.P; |
| 260 | |
| 261 | sCompatibilityDone = true; |
| 262 | } |
| 263 | |
Alan Viverette | 617feb9 | 2013-09-09 18:09:13 -0700 | [diff] [blame] | 264 | final TypedArray a = context.obtainStyledAttributes( |
| 265 | attrs, com.android.internal.R.styleable.LinearLayout, defStyleAttr, defStyleRes); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 266 | |
| 267 | int index = a.getInt(com.android.internal.R.styleable.LinearLayout_orientation, -1); |
| 268 | if (index >= 0) { |
| 269 | setOrientation(index); |
| 270 | } |
| 271 | |
| 272 | index = a.getInt(com.android.internal.R.styleable.LinearLayout_gravity, -1); |
| 273 | if (index >= 0) { |
| 274 | setGravity(index); |
| 275 | } |
| 276 | |
| 277 | boolean baselineAligned = a.getBoolean(R.styleable.LinearLayout_baselineAligned, true); |
| 278 | if (!baselineAligned) { |
| 279 | setBaselineAligned(baselineAligned); |
| 280 | } |
| 281 | |
| 282 | mWeightSum = a.getFloat(R.styleable.LinearLayout_weightSum, -1.0f); |
| 283 | |
| 284 | mBaselineAlignedChildIndex = |
| 285 | a.getInt(com.android.internal.R.styleable.LinearLayout_baselineAlignedChildIndex, -1); |
| 286 | |
Romain Guy | 9295ada | 2010-06-15 11:33:24 -0700 | [diff] [blame] | 287 | mUseLargestChild = a.getBoolean(R.styleable.LinearLayout_measureWithLargestChild, false); |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 288 | |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 289 | mShowDividers = a.getInt(R.styleable.LinearLayout_showDividers, SHOW_DIVIDER_NONE); |
| 290 | mDividerPadding = a.getDimensionPixelSize(R.styleable.LinearLayout_dividerPadding, 0); |
Kirill Grouchnikov | 3218a4e | 2017-04-26 17:45:28 -0400 | [diff] [blame] | 291 | setDividerDrawable(a.getDrawable(R.styleable.LinearLayout_divider)); |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 292 | |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 293 | final int version = context.getApplicationInfo().targetSdkVersion; |
| 294 | mAllowInconsistentMeasurement = version <= Build.VERSION_CODES.M; |
| 295 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 296 | a.recycle(); |
| 297 | } |
| 298 | |
| 299 | /** |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 300 | * Returns <code>true</code> if this layout is currently configured to show at least one |
| 301 | * divider. |
| 302 | */ |
| 303 | private boolean isShowingDividers() { |
| 304 | return (mShowDividers != SHOW_DIVIDER_NONE) && (mDivider != null); |
| 305 | } |
| 306 | |
| 307 | /** |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 308 | * Set how dividers should be shown between items in this layout |
| 309 | * |
| 310 | * @param showDividers One or more of {@link #SHOW_DIVIDER_BEGINNING}, |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 311 | * {@link #SHOW_DIVIDER_MIDDLE}, or {@link #SHOW_DIVIDER_END} |
| 312 | * to show dividers, or {@link #SHOW_DIVIDER_NONE} to show no dividers. |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 313 | */ |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 314 | public void setShowDividers(@DividerMode int showDividers) { |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 315 | if (showDividers == mShowDividers) { |
| 316 | return; |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 317 | } |
| 318 | mShowDividers = showDividers; |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 319 | |
| 320 | setWillNotDraw(!isShowingDividers()); |
| 321 | requestLayout(); |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 322 | } |
| 323 | |
Patrick Dubroy | e0a799a | 2011-05-04 16:19:22 -0700 | [diff] [blame] | 324 | @Override |
| 325 | public boolean shouldDelayChildPressedState() { |
| 326 | return false; |
| 327 | } |
| 328 | |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 329 | /** |
| 330 | * @return A flag set indicating how dividers should be shown around items. |
| 331 | * @see #setShowDividers(int) |
| 332 | */ |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 333 | @DividerMode |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 334 | public int getShowDividers() { |
| 335 | return mShowDividers; |
| 336 | } |
| 337 | |
| 338 | /** |
Philip Milne | 1018fb4 | 2012-03-13 12:00:04 -0700 | [diff] [blame] | 339 | * @return the divider Drawable that will divide each item. |
| 340 | * |
| 341 | * @see #setDividerDrawable(Drawable) |
| 342 | * |
| 343 | * @attr ref android.R.styleable#LinearLayout_divider |
| 344 | */ |
| 345 | public Drawable getDividerDrawable() { |
| 346 | return mDivider; |
| 347 | } |
| 348 | |
| 349 | /** |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 350 | * Set a drawable to be used as a divider between items. |
Philip Milne | 1018fb4 | 2012-03-13 12:00:04 -0700 | [diff] [blame] | 351 | * |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 352 | * @param divider Drawable that will divide each item. |
Philip Milne | 1018fb4 | 2012-03-13 12:00:04 -0700 | [diff] [blame] | 353 | * |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 354 | * @see #setShowDividers(int) |
Philip Milne | 1018fb4 | 2012-03-13 12:00:04 -0700 | [diff] [blame] | 355 | * |
| 356 | * @attr ref android.R.styleable#LinearLayout_divider |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 357 | */ |
| 358 | public void setDividerDrawable(Drawable divider) { |
| 359 | if (divider == mDivider) { |
| 360 | return; |
| 361 | } |
| 362 | mDivider = divider; |
| 363 | if (divider != null) { |
| 364 | mDividerWidth = divider.getIntrinsicWidth(); |
| 365 | mDividerHeight = divider.getIntrinsicHeight(); |
| 366 | } else { |
| 367 | mDividerWidth = 0; |
| 368 | mDividerHeight = 0; |
| 369 | } |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 370 | |
| 371 | setWillNotDraw(!isShowingDividers()); |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 372 | requestLayout(); |
| 373 | } |
| 374 | |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 375 | /** |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 376 | * Set padding displayed on both ends of dividers. For a vertical layout, the padding is applied |
| 377 | * to left and right end of dividers. For a horizontal layout, the padding is applied to top and |
| 378 | * bottom end of dividers. |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 379 | * |
| 380 | * @param padding Padding value in pixels that will be applied to each end |
| 381 | * |
| 382 | * @see #setShowDividers(int) |
| 383 | * @see #setDividerDrawable(Drawable) |
| 384 | * @see #getDividerPadding() |
| 385 | */ |
| 386 | public void setDividerPadding(int padding) { |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 387 | if (padding == mDividerPadding) { |
| 388 | return; |
| 389 | } |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 390 | mDividerPadding = padding; |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 391 | |
| 392 | if (isShowingDividers()) { |
| 393 | requestLayout(); |
| 394 | invalidate(); |
| 395 | } |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | /** |
| 399 | * Get the padding size used to inset dividers in pixels |
| 400 | * |
| 401 | * @see #setShowDividers(int) |
| 402 | * @see #setDividerDrawable(Drawable) |
| 403 | * @see #setDividerPadding(int) |
| 404 | */ |
| 405 | public int getDividerPadding() { |
| 406 | return mDividerPadding; |
| 407 | } |
| 408 | |
Adam Powell | 640a66e | 2011-04-29 10:18:53 -0700 | [diff] [blame] | 409 | /** |
| 410 | * Get the width of the current divider drawable. |
| 411 | * |
| 412 | * @hide Used internally by framework. |
| 413 | */ |
| 414 | public int getDividerWidth() { |
| 415 | return mDividerWidth; |
| 416 | } |
| 417 | |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 418 | @Override |
| 419 | protected void onDraw(Canvas canvas) { |
| 420 | if (mDivider == null) { |
| 421 | return; |
| 422 | } |
| 423 | |
| 424 | if (mOrientation == VERTICAL) { |
| 425 | drawDividersVertical(canvas); |
| 426 | } else { |
| 427 | drawDividersHorizontal(canvas); |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | void drawDividersVertical(Canvas canvas) { |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 432 | final int count = getVirtualChildCount(); |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 433 | for (int i = 0; i < count; i++) { |
| 434 | final View child = getVirtualChildAt(i); |
Adam Powell | 35aecd5 | 2011-07-01 13:43:49 -0700 | [diff] [blame] | 435 | if (child != null && child.getVisibility() != GONE) { |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 436 | if (hasDividerBeforeChildAt(i)) { |
Adam Powell | 35aecd5 | 2011-07-01 13:43:49 -0700 | [diff] [blame] | 437 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
Vladimir Baryshnikov | 20761fc | 2012-01-17 14:59:48 -0800 | [diff] [blame] | 438 | final int top = child.getTop() - lp.topMargin - mDividerHeight; |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 439 | drawHorizontalDivider(canvas, top); |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 440 | } |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 441 | } |
| 442 | } |
| 443 | |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 444 | if (hasDividerBeforeChildAt(count)) { |
Doris Liu | ec6a4cd | 2015-06-25 15:16:54 -0700 | [diff] [blame] | 445 | final View child = getLastNonGoneChild(); |
Adam Powell | 35aecd5 | 2011-07-01 13:43:49 -0700 | [diff] [blame] | 446 | int bottom = 0; |
| 447 | if (child == null) { |
| 448 | bottom = getHeight() - getPaddingBottom() - mDividerHeight; |
| 449 | } else { |
| 450 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| 451 | bottom = child.getBottom() + lp.bottomMargin; |
| 452 | } |
| 453 | drawHorizontalDivider(canvas, bottom); |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 454 | } |
| 455 | } |
| 456 | |
Doris Liu | ec6a4cd | 2015-06-25 15:16:54 -0700 | [diff] [blame] | 457 | /** |
| 458 | * Finds the last child that is not gone. The last child will be used as the reference for |
| 459 | * where the end divider should be drawn. |
| 460 | */ |
| 461 | private View getLastNonGoneChild() { |
| 462 | for (int i = getVirtualChildCount() - 1; i >= 0; i--) { |
Alan Viverette | ad52693 | 2015-12-17 12:42:39 -0500 | [diff] [blame] | 463 | final View child = getVirtualChildAt(i); |
Doris Liu | ec6a4cd | 2015-06-25 15:16:54 -0700 | [diff] [blame] | 464 | if (child != null && child.getVisibility() != GONE) { |
| 465 | return child; |
| 466 | } |
| 467 | } |
| 468 | return null; |
| 469 | } |
| 470 | |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 471 | void drawDividersHorizontal(Canvas canvas) { |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 472 | final int count = getVirtualChildCount(); |
Fabrice Di Meglio | 4ab6968 | 2012-07-02 19:12:40 -0700 | [diff] [blame] | 473 | final boolean isLayoutRtl = isLayoutRtl(); |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 474 | for (int i = 0; i < count; i++) { |
| 475 | final View child = getVirtualChildAt(i); |
Adam Powell | 35aecd5 | 2011-07-01 13:43:49 -0700 | [diff] [blame] | 476 | if (child != null && child.getVisibility() != GONE) { |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 477 | if (hasDividerBeforeChildAt(i)) { |
Adam Powell | 35aecd5 | 2011-07-01 13:43:49 -0700 | [diff] [blame] | 478 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
Fabrice Di Meglio | 4ab6968 | 2012-07-02 19:12:40 -0700 | [diff] [blame] | 479 | final int position; |
| 480 | if (isLayoutRtl) { |
| 481 | position = child.getRight() + lp.rightMargin; |
| 482 | } else { |
| 483 | position = child.getLeft() - lp.leftMargin - mDividerWidth; |
| 484 | } |
| 485 | drawVerticalDivider(canvas, position); |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 486 | } |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 487 | } |
| 488 | } |
| 489 | |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 490 | if (hasDividerBeforeChildAt(count)) { |
Doris Liu | ec6a4cd | 2015-06-25 15:16:54 -0700 | [diff] [blame] | 491 | final View child = getLastNonGoneChild(); |
Fabrice Di Meglio | 4ab6968 | 2012-07-02 19:12:40 -0700 | [diff] [blame] | 492 | int position; |
Adam Powell | 35aecd5 | 2011-07-01 13:43:49 -0700 | [diff] [blame] | 493 | if (child == null) { |
Fabrice Di Meglio | 4ab6968 | 2012-07-02 19:12:40 -0700 | [diff] [blame] | 494 | if (isLayoutRtl) { |
| 495 | position = getPaddingLeft(); |
| 496 | } else { |
| 497 | position = getWidth() - getPaddingRight() - mDividerWidth; |
| 498 | } |
Adam Powell | 35aecd5 | 2011-07-01 13:43:49 -0700 | [diff] [blame] | 499 | } else { |
| 500 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
Fabrice Di Meglio | 4ab6968 | 2012-07-02 19:12:40 -0700 | [diff] [blame] | 501 | if (isLayoutRtl) { |
| 502 | position = child.getLeft() - lp.leftMargin - mDividerWidth; |
| 503 | } else { |
| 504 | position = child.getRight() + lp.rightMargin; |
| 505 | } |
Adam Powell | 35aecd5 | 2011-07-01 13:43:49 -0700 | [diff] [blame] | 506 | } |
Fabrice Di Meglio | 4ab6968 | 2012-07-02 19:12:40 -0700 | [diff] [blame] | 507 | drawVerticalDivider(canvas, position); |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 508 | } |
| 509 | } |
| 510 | |
| 511 | void drawHorizontalDivider(Canvas canvas, int top) { |
| 512 | mDivider.setBounds(getPaddingLeft() + mDividerPadding, top, |
| 513 | getWidth() - getPaddingRight() - mDividerPadding, top + mDividerHeight); |
| 514 | mDivider.draw(canvas); |
| 515 | } |
| 516 | |
| 517 | void drawVerticalDivider(Canvas canvas, int left) { |
| 518 | mDivider.setBounds(left, getPaddingTop() + mDividerPadding, |
| 519 | left + mDividerWidth, getHeight() - getPaddingBottom() - mDividerPadding); |
| 520 | mDivider.draw(canvas); |
| 521 | } |
| 522 | |
| 523 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 524 | * <p>Indicates whether widgets contained within this layout are aligned |
| 525 | * on their baseline or not.</p> |
| 526 | * |
| 527 | * @return true when widgets are baseline-aligned, false otherwise |
| 528 | */ |
| 529 | public boolean isBaselineAligned() { |
| 530 | return mBaselineAligned; |
| 531 | } |
| 532 | |
| 533 | /** |
| 534 | * <p>Defines whether widgets contained in this layout are |
| 535 | * baseline-aligned or not.</p> |
| 536 | * |
| 537 | * @param baselineAligned true to align widgets on their baseline, |
| 538 | * false otherwise |
| 539 | * |
| 540 | * @attr ref android.R.styleable#LinearLayout_baselineAligned |
| 541 | */ |
| 542 | @android.view.RemotableViewMethod |
| 543 | public void setBaselineAligned(boolean baselineAligned) { |
| 544 | mBaselineAligned = baselineAligned; |
| 545 | } |
| 546 | |
Romain Guy | 9295ada | 2010-06-15 11:33:24 -0700 | [diff] [blame] | 547 | /** |
| 548 | * When true, all children with a weight will be considered having |
| 549 | * the minimum size of the largest child. If false, all children are |
| 550 | * measured normally. |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 551 | * |
Romain Guy | 9295ada | 2010-06-15 11:33:24 -0700 | [diff] [blame] | 552 | * @return True to measure children with a weight using the minimum |
| 553 | * size of the largest child, false otherwise. |
Philip Milne | 1018fb4 | 2012-03-13 12:00:04 -0700 | [diff] [blame] | 554 | * |
| 555 | * @attr ref android.R.styleable#LinearLayout_measureWithLargestChild |
Romain Guy | 9295ada | 2010-06-15 11:33:24 -0700 | [diff] [blame] | 556 | */ |
| 557 | public boolean isMeasureWithLargestChildEnabled() { |
| 558 | return mUseLargestChild; |
| 559 | } |
| 560 | |
| 561 | /** |
| 562 | * When set to true, all children with a weight will be considered having |
| 563 | * the minimum size of the largest child. If false, all children are |
| 564 | * measured normally. |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 565 | * |
Romain Guy | 9295ada | 2010-06-15 11:33:24 -0700 | [diff] [blame] | 566 | * Disabled by default. |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 567 | * |
Romain Guy | 9295ada | 2010-06-15 11:33:24 -0700 | [diff] [blame] | 568 | * @param enabled True to measure children with a weight using the |
| 569 | * minimum size of the largest child, false otherwise. |
Philip Milne | 1018fb4 | 2012-03-13 12:00:04 -0700 | [diff] [blame] | 570 | * |
| 571 | * @attr ref android.R.styleable#LinearLayout_measureWithLargestChild |
Romain Guy | 9295ada | 2010-06-15 11:33:24 -0700 | [diff] [blame] | 572 | */ |
| 573 | @android.view.RemotableViewMethod |
| 574 | public void setMeasureWithLargestChildEnabled(boolean enabled) { |
| 575 | mUseLargestChild = enabled; |
| 576 | } |
| 577 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 578 | @Override |
| 579 | public int getBaseline() { |
| 580 | if (mBaselineAlignedChildIndex < 0) { |
| 581 | return super.getBaseline(); |
| 582 | } |
| 583 | |
| 584 | if (getChildCount() <= mBaselineAlignedChildIndex) { |
| 585 | throw new RuntimeException("mBaselineAlignedChildIndex of LinearLayout " |
| 586 | + "set to an index that is out of bounds."); |
| 587 | } |
| 588 | |
| 589 | final View child = getChildAt(mBaselineAlignedChildIndex); |
| 590 | final int childBaseline = child.getBaseline(); |
| 591 | |
| 592 | if (childBaseline == -1) { |
| 593 | if (mBaselineAlignedChildIndex == 0) { |
| 594 | // this is just the default case, safe to return -1 |
| 595 | return -1; |
| 596 | } |
| 597 | // the user picked an index that points to something that doesn't |
| 598 | // know how to calculate its baseline. |
| 599 | throw new RuntimeException("mBaselineAlignedChildIndex of LinearLayout " |
| 600 | + "points to a View that doesn't know how to get its baseline."); |
| 601 | } |
| 602 | |
| 603 | // TODO: This should try to take into account the virtual offsets |
| 604 | // (See getNextLocationOffset and getLocationOffset) |
| 605 | // We should add to childTop: |
| 606 | // sum([getNextLocationOffset(getChildAt(i)) / i < mBaselineAlignedChildIndex]) |
| 607 | // and also add: |
| 608 | // getLocationOffset(child) |
| 609 | int childTop = mBaselineChildTop; |
| 610 | |
| 611 | if (mOrientation == VERTICAL) { |
| 612 | final int majorGravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK; |
| 613 | if (majorGravity != Gravity.TOP) { |
| 614 | switch (majorGravity) { |
| 615 | case Gravity.BOTTOM: |
| 616 | childTop = mBottom - mTop - mPaddingBottom - mTotalLength; |
| 617 | break; |
| 618 | |
| 619 | case Gravity.CENTER_VERTICAL: |
| 620 | childTop += ((mBottom - mTop - mPaddingTop - mPaddingBottom) - |
| 621 | mTotalLength) / 2; |
| 622 | break; |
| 623 | } |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) child.getLayoutParams(); |
| 628 | return childTop + lp.topMargin + childBaseline; |
| 629 | } |
| 630 | |
| 631 | /** |
| 632 | * @return The index of the child that will be used if this layout is |
| 633 | * part of a larger layout that is baseline aligned, or -1 if none has |
| 634 | * been set. |
| 635 | */ |
| 636 | public int getBaselineAlignedChildIndex() { |
| 637 | return mBaselineAlignedChildIndex; |
| 638 | } |
| 639 | |
| 640 | /** |
| 641 | * @param i The index of the child that will be used if this layout is |
| 642 | * part of a larger layout that is baseline aligned. |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 643 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 644 | * @attr ref android.R.styleable#LinearLayout_baselineAlignedChildIndex |
| 645 | */ |
| 646 | @android.view.RemotableViewMethod |
| 647 | public void setBaselineAlignedChildIndex(int i) { |
| 648 | if ((i < 0) || (i >= getChildCount())) { |
| 649 | throw new IllegalArgumentException("base aligned child index out " |
| 650 | + "of range (0, " + getChildCount() + ")"); |
| 651 | } |
| 652 | mBaselineAlignedChildIndex = i; |
| 653 | } |
| 654 | |
| 655 | /** |
kopriva | debd4ee | 2018-09-13 10:59:46 -0700 | [diff] [blame] | 656 | * <p>Returns the view at the specified index. This method can be overridden |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 657 | * to take into account virtual children. Refer to |
| 658 | * {@link android.widget.TableLayout} and {@link android.widget.TableRow} |
| 659 | * for an example.</p> |
| 660 | * |
| 661 | * @param index the child's index |
Alan Viverette | ad52693 | 2015-12-17 12:42:39 -0500 | [diff] [blame] | 662 | * @return the child at the specified index, may be {@code null} |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 663 | */ |
Alan Viverette | ad52693 | 2015-12-17 12:42:39 -0500 | [diff] [blame] | 664 | @Nullable |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 665 | View getVirtualChildAt(int index) { |
| 666 | return getChildAt(index); |
| 667 | } |
| 668 | |
| 669 | /** |
| 670 | * <p>Returns the virtual number of children. This number might be different |
| 671 | * than the actual number of children if the layout can hold virtual |
| 672 | * children. Refer to |
| 673 | * {@link android.widget.TableLayout} and {@link android.widget.TableRow} |
| 674 | * for an example.</p> |
| 675 | * |
| 676 | * @return the virtual number of children |
| 677 | */ |
| 678 | int getVirtualChildCount() { |
| 679 | return getChildCount(); |
| 680 | } |
| 681 | |
| 682 | /** |
| 683 | * Returns the desired weights sum. |
| 684 | * |
| 685 | * @return A number greater than 0.0f if the weight sum is defined, or |
| 686 | * a number lower than or equals to 0.0f if not weight sum is |
| 687 | * to be used. |
| 688 | */ |
| 689 | public float getWeightSum() { |
| 690 | return mWeightSum; |
| 691 | } |
| 692 | |
| 693 | /** |
| 694 | * Defines the desired weights sum. If unspecified the weights sum is computed |
| 695 | * at layout time by adding the layout_weight of each child. |
| 696 | * |
| 697 | * This can be used for instance to give a single child 50% of the total |
| 698 | * available space by giving it a layout_weight of 0.5 and setting the |
| 699 | * weightSum to 1.0. |
| 700 | * |
| 701 | * @param weightSum a number greater than 0.0f, or a number lower than or equals |
| 702 | * to 0.0f if the weight sum should be computed from the children's |
| 703 | * layout_weight |
| 704 | */ |
| 705 | @android.view.RemotableViewMethod |
| 706 | public void setWeightSum(float weightSum) { |
| 707 | mWeightSum = Math.max(0.0f, weightSum); |
| 708 | } |
| 709 | |
| 710 | @Override |
| 711 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| 712 | if (mOrientation == VERTICAL) { |
| 713 | measureVertical(widthMeasureSpec, heightMeasureSpec); |
| 714 | } else { |
| 715 | measureHorizontal(widthMeasureSpec, heightMeasureSpec); |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | /** |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 720 | * Determines where to position dividers between children. |
| 721 | * |
| 722 | * @param childIndex Index of child to check for preceding divider |
| 723 | * @return true if there should be a divider before the child at childIndex |
| 724 | * @hide Pending API consideration. Currently only used internally by the system. |
| 725 | */ |
| 726 | protected boolean hasDividerBeforeChildAt(int childIndex) { |
Doris Liu | ec6a4cd | 2015-06-25 15:16:54 -0700 | [diff] [blame] | 727 | if (childIndex == getVirtualChildCount()) { |
| 728 | // Check whether the end divider should draw. |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 729 | return (mShowDividers & SHOW_DIVIDER_END) != 0; |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 730 | } |
Doris Liu | ec6a4cd | 2015-06-25 15:16:54 -0700 | [diff] [blame] | 731 | boolean allViewsAreGoneBefore = allViewsAreGoneBefore(childIndex); |
| 732 | if (allViewsAreGoneBefore) { |
| 733 | // This is the first view that's not gone, check if beginning divider is enabled. |
| 734 | return (mShowDividers & SHOW_DIVIDER_BEGINNING) != 0; |
| 735 | } else { |
| 736 | return (mShowDividers & SHOW_DIVIDER_MIDDLE) != 0; |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | /** |
| 741 | * Checks whether all (virtual) child views before the given index are gone. |
| 742 | */ |
| 743 | private boolean allViewsAreGoneBefore(int childIndex) { |
| 744 | for (int i = childIndex - 1; i >= 0; i--) { |
Alan Viverette | ad52693 | 2015-12-17 12:42:39 -0500 | [diff] [blame] | 745 | final View child = getVirtualChildAt(i); |
Doris Liu | f102d42 | 2015-06-30 13:42:22 -0700 | [diff] [blame] | 746 | if (child != null && child.getVisibility() != GONE) { |
Doris Liu | ec6a4cd | 2015-06-25 15:16:54 -0700 | [diff] [blame] | 747 | return false; |
| 748 | } |
| 749 | } |
| 750 | return true; |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 751 | } |
| 752 | |
| 753 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 754 | * Measures the children when the orientation of this LinearLayout is set |
| 755 | * to {@link #VERTICAL}. |
| 756 | * |
| 757 | * @param widthMeasureSpec Horizontal space requirements as imposed by the parent. |
| 758 | * @param heightMeasureSpec Vertical space requirements as imposed by the parent. |
| 759 | * |
| 760 | * @see #getOrientation() |
| 761 | * @see #setOrientation(int) |
| 762 | * @see #onMeasure(int, int) |
| 763 | */ |
| 764 | void measureVertical(int widthMeasureSpec, int heightMeasureSpec) { |
| 765 | mTotalLength = 0; |
| 766 | int maxWidth = 0; |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 767 | int childState = 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 768 | int alternativeMaxWidth = 0; |
| 769 | int weightedMaxWidth = 0; |
| 770 | boolean allFillParent = true; |
| 771 | float totalWeight = 0; |
| 772 | |
| 773 | final int count = getVirtualChildCount(); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 774 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 775 | final int widthMode = MeasureSpec.getMode(widthMeasureSpec); |
| 776 | final int heightMode = MeasureSpec.getMode(heightMeasureSpec); |
| 777 | |
| 778 | boolean matchWidth = false; |
Alan Viverette | 65be9cc | 2014-02-24 18:21:09 -0800 | [diff] [blame] | 779 | boolean skippedMeasure = false; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 780 | |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 781 | final int baselineChildIndex = mBaselineAlignedChildIndex; |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 782 | final boolean useLargestChild = mUseLargestChild; |
| 783 | |
| 784 | int largestChildHeight = Integer.MIN_VALUE; |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 785 | int consumedExcessSpace = 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 786 | |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 787 | int nonSkippedChildCount = 0; |
| 788 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 789 | // See how tall everyone is. Also remember max width. |
| 790 | for (int i = 0; i < count; ++i) { |
| 791 | final View child = getVirtualChildAt(i); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 792 | if (child == null) { |
| 793 | mTotalLength += measureNullChild(i); |
| 794 | continue; |
| 795 | } |
| 796 | |
| 797 | if (child.getVisibility() == View.GONE) { |
| 798 | i += getChildrenSkipCount(child, i); |
| 799 | continue; |
| 800 | } |
| 801 | |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 802 | nonSkippedChildCount++; |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 803 | if (hasDividerBeforeChildAt(i)) { |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 804 | mTotalLength += mDividerHeight; |
| 805 | } |
| 806 | |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 807 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
Alan Viverette | 61c41bf | 2016-05-05 17:52:10 +0000 | [diff] [blame] | 808 | |
| 809 | totalWeight += lp.weight; |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 810 | |
| 811 | final boolean useExcessSpace = lp.height == 0 && lp.weight > 0; |
| 812 | if (heightMode == MeasureSpec.EXACTLY && useExcessSpace) { |
| 813 | // Optimization: don't bother measuring children who are only |
| 814 | // laid out using excess space. These views will get measured |
| 815 | // later if we have space to distribute. |
Romain Guy | 053b480 | 2010-02-05 15:34:33 -0800 | [diff] [blame] | 816 | final int totalLength = mTotalLength; |
| 817 | mTotalLength = Math.max(totalLength, totalLength + lp.topMargin + lp.bottomMargin); |
Alan Viverette | 65be9cc | 2014-02-24 18:21:09 -0800 | [diff] [blame] | 818 | skippedMeasure = true; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 819 | } else { |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 820 | if (useExcessSpace) { |
| 821 | // The heightMode is either UNSPECIFIED or AT_MOST, and |
| 822 | // this child is only laid out using excess space. Measure |
| 823 | // using WRAP_CONTENT so that we can find out the view's |
| 824 | // optimal height. We'll restore the original height of 0 |
| 825 | // after measurement. |
Gilles Debunne | f5c6eff | 2010-02-09 19:08:36 -0800 | [diff] [blame] | 826 | lp.height = LayoutParams.WRAP_CONTENT; |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 827 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 828 | |
Gilles Debunne | f5c6eff | 2010-02-09 19:08:36 -0800 | [diff] [blame] | 829 | // Determine how big this child would like to be. If this or |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 830 | // previous children have given a weight, then we allow it to |
| 831 | // use all available space (and we will shrink things later |
| 832 | // if needed). |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 833 | final int usedHeight = totalWeight == 0 ? mTotalLength : 0; |
| 834 | measureChildBeforeLayout(child, i, widthMeasureSpec, 0, |
| 835 | heightMeasureSpec, usedHeight); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 836 | |
Alan Viverette | 5a969df | 2015-07-31 12:42:10 -0400 | [diff] [blame] | 837 | final int childHeight = child.getMeasuredHeight(); |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 838 | if (useExcessSpace) { |
| 839 | // Restore the original height and record how much space |
| 840 | // we've allocated to excess-only children so that we can |
| 841 | // match the behavior of EXACTLY measurement. |
| 842 | lp.height = 0; |
| 843 | consumedExcessSpace += childHeight; |
| 844 | } |
| 845 | |
Romain Guy | 053b480 | 2010-02-05 15:34:33 -0800 | [diff] [blame] | 846 | final int totalLength = mTotalLength; |
| 847 | mTotalLength = Math.max(totalLength, totalLength + childHeight + lp.topMargin + |
| 848 | lp.bottomMargin + getNextLocationOffset(child)); |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 849 | |
| 850 | if (useLargestChild) { |
| 851 | largestChildHeight = Math.max(childHeight, largestChildHeight); |
| 852 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 853 | } |
| 854 | |
| 855 | /** |
| 856 | * If applicable, compute the additional offset to the child's baseline |
| 857 | * we'll need later when asked {@link #getBaseline}. |
| 858 | */ |
| 859 | if ((baselineChildIndex >= 0) && (baselineChildIndex == i + 1)) { |
| 860 | mBaselineChildTop = mTotalLength; |
| 861 | } |
| 862 | |
| 863 | // if we are trying to use a child index for our baseline, the above |
| 864 | // book keeping only works if there are no children above it with |
| 865 | // weight. fail fast to aid the developer. |
| 866 | if (i < baselineChildIndex && lp.weight > 0) { |
| 867 | throw new RuntimeException("A child of LinearLayout with index " |
| 868 | + "less than mBaselineAlignedChildIndex has weight > 0, which " |
| 869 | + "won't work. Either remove the weight, or don't set " |
| 870 | + "mBaselineAlignedChildIndex."); |
| 871 | } |
| 872 | |
| 873 | boolean matchWidthLocally = false; |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 874 | if (widthMode != MeasureSpec.EXACTLY && lp.width == LayoutParams.MATCH_PARENT) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 875 | // The width of the linear layout will scale, and at least one |
| 876 | // child said it wanted to match our width. Set a flag |
| 877 | // indicating that we need to remeasure at least that view when |
| 878 | // we know our width. |
| 879 | matchWidth = true; |
| 880 | matchWidthLocally = true; |
| 881 | } |
| 882 | |
| 883 | final int margin = lp.leftMargin + lp.rightMargin; |
| 884 | final int measuredWidth = child.getMeasuredWidth() + margin; |
| 885 | maxWidth = Math.max(maxWidth, measuredWidth); |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 886 | childState = combineMeasuredStates(childState, child.getMeasuredState()); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 887 | |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 888 | allFillParent = allFillParent && lp.width == LayoutParams.MATCH_PARENT; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 889 | if (lp.weight > 0) { |
| 890 | /* |
| 891 | * Widths of weighted Views are bogus if we end up |
| 892 | * remeasuring, so keep them separate. |
| 893 | */ |
| 894 | weightedMaxWidth = Math.max(weightedMaxWidth, |
| 895 | matchWidthLocally ? margin : measuredWidth); |
| 896 | } else { |
| 897 | alternativeMaxWidth = Math.max(alternativeMaxWidth, |
| 898 | matchWidthLocally ? margin : measuredWidth); |
| 899 | } |
| 900 | |
| 901 | i += getChildrenSkipCount(child, i); |
| 902 | } |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 903 | |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 904 | if (nonSkippedChildCount > 0 && hasDividerBeforeChildAt(count)) { |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 905 | mTotalLength += mDividerHeight; |
| 906 | } |
| 907 | |
Adam Powell | f8ac6b7 | 2011-05-23 18:14:09 -0700 | [diff] [blame] | 908 | if (useLargestChild && |
| 909 | (heightMode == MeasureSpec.AT_MOST || heightMode == MeasureSpec.UNSPECIFIED)) { |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 910 | mTotalLength = 0; |
| 911 | |
| 912 | for (int i = 0; i < count; ++i) { |
| 913 | final View child = getVirtualChildAt(i); |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 914 | if (child == null) { |
| 915 | mTotalLength += measureNullChild(i); |
| 916 | continue; |
| 917 | } |
| 918 | |
| 919 | if (child.getVisibility() == GONE) { |
| 920 | i += getChildrenSkipCount(child, i); |
| 921 | continue; |
| 922 | } |
| 923 | |
| 924 | final LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) |
| 925 | child.getLayoutParams(); |
Romain Guy | 053b480 | 2010-02-05 15:34:33 -0800 | [diff] [blame] | 926 | // Account for negative margins |
| 927 | final int totalLength = mTotalLength; |
| 928 | mTotalLength = Math.max(totalLength, totalLength + largestChildHeight + |
| 929 | lp.topMargin + lp.bottomMargin + getNextLocationOffset(child)); |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 930 | } |
| 931 | } |
| 932 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 933 | // Add in our padding |
| 934 | mTotalLength += mPaddingTop + mPaddingBottom; |
| 935 | |
| 936 | int heightSize = mTotalLength; |
| 937 | |
| 938 | // Check against our minimum height |
| 939 | heightSize = Math.max(heightSize, getSuggestedMinimumHeight()); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 940 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 941 | // Reconcile our calculated size with the heightMeasureSpec |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 942 | int heightSizeAndState = resolveSizeAndState(heightSize, heightMeasureSpec, 0); |
| 943 | heightSize = heightSizeAndState & MEASURED_SIZE_MASK; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 944 | // Either expand children with weight to take up available space or |
Alan Viverette | 65be9cc | 2014-02-24 18:21:09 -0800 | [diff] [blame] | 945 | // shrink them if they extend beyond our current bounds. If we skipped |
| 946 | // measurement on any children, we need to measure them now. |
Alan Viverette | 918f886 | 2016-03-17 12:28:31 -0400 | [diff] [blame] | 947 | int remainingExcess = heightSize - mTotalLength |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 948 | + (mAllowInconsistentMeasurement ? 0 : consumedExcessSpace); |
Chet Haase | cb84888 | 2018-03-21 14:09:44 -0700 | [diff] [blame] | 949 | if (skippedMeasure |
| 950 | || ((sRemeasureWeightedChildren || remainingExcess != 0) && totalWeight > 0.0f)) { |
Alan Viverette | 918f886 | 2016-03-17 12:28:31 -0400 | [diff] [blame] | 951 | float remainingWeightSum = mWeightSum > 0.0f ? mWeightSum : totalWeight; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 952 | |
| 953 | mTotalLength = 0; |
| 954 | |
| 955 | for (int i = 0; i < count; ++i) { |
| 956 | final View child = getVirtualChildAt(i); |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 957 | if (child == null || child.getVisibility() == View.GONE) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 958 | continue; |
| 959 | } |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 960 | |
| 961 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
Alan Viverette | 918f886 | 2016-03-17 12:28:31 -0400 | [diff] [blame] | 962 | final float childWeight = lp.weight; |
| 963 | if (childWeight > 0) { |
Alan Viverette | 61c41bf | 2016-05-05 17:52:10 +0000 | [diff] [blame] | 964 | final int share = (int) (childWeight * remainingExcess / remainingWeightSum); |
Alan Viverette | 918f886 | 2016-03-17 12:28:31 -0400 | [diff] [blame] | 965 | remainingExcess -= share; |
| 966 | remainingWeightSum -= childWeight; |
| 967 | |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 968 | final int childHeight; |
Alan Viverette | 070b22b | 2016-06-30 11:15:36 -0400 | [diff] [blame] | 969 | if (mUseLargestChild && heightMode != MeasureSpec.EXACTLY) { |
| 970 | childHeight = largestChildHeight; |
| 971 | } else if (lp.height == 0 && (!mAllowInconsistentMeasurement |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 972 | || heightMode == MeasureSpec.EXACTLY)) { |
| 973 | // This child needs to be laid out from scratch using |
| 974 | // only its share of excess space. |
| 975 | childHeight = share; |
Alan Viverette | 5a969df | 2015-07-31 12:42:10 -0400 | [diff] [blame] | 976 | } else { |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 977 | // This child had some intrinsic height to which we |
| 978 | // need to add its share of excess space. |
| 979 | childHeight = child.getMeasuredHeight() + share; |
Alan Viverette | 5a969df | 2015-07-31 12:42:10 -0400 | [diff] [blame] | 980 | } |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 981 | |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 982 | final int childHeightMeasureSpec = MeasureSpec.makeMeasureSpec( |
| 983 | Math.max(0, childHeight), MeasureSpec.EXACTLY); |
| 984 | final int childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec, |
| 985 | mPaddingLeft + mPaddingRight + lp.leftMargin + lp.rightMargin, |
| 986 | lp.width); |
| 987 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
| 988 | |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 989 | // Child may now not fit in vertical dimension. |
| 990 | childState = combineMeasuredStates(childState, child.getMeasuredState() |
| 991 | & (MEASURED_STATE_MASK>>MEASURED_HEIGHT_STATE_SHIFT)); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 992 | } |
| 993 | |
| 994 | final int margin = lp.leftMargin + lp.rightMargin; |
| 995 | final int measuredWidth = child.getMeasuredWidth() + margin; |
| 996 | maxWidth = Math.max(maxWidth, measuredWidth); |
| 997 | |
| 998 | boolean matchWidthLocally = widthMode != MeasureSpec.EXACTLY && |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 999 | lp.width == LayoutParams.MATCH_PARENT; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1000 | |
| 1001 | alternativeMaxWidth = Math.max(alternativeMaxWidth, |
| 1002 | matchWidthLocally ? margin : measuredWidth); |
| 1003 | |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1004 | allFillParent = allFillParent && lp.width == LayoutParams.MATCH_PARENT; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1005 | |
Romain Guy | 053b480 | 2010-02-05 15:34:33 -0800 | [diff] [blame] | 1006 | final int totalLength = mTotalLength; |
| 1007 | mTotalLength = Math.max(totalLength, totalLength + child.getMeasuredHeight() + |
| 1008 | lp.topMargin + lp.bottomMargin + getNextLocationOffset(child)); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1009 | } |
| 1010 | |
| 1011 | // Add in our padding |
Romain Guy | 053b480 | 2010-02-05 15:34:33 -0800 | [diff] [blame] | 1012 | mTotalLength += mPaddingTop + mPaddingBottom; |
| 1013 | // TODO: Should we recompute the heightSpec based on the new total length? |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1014 | } else { |
| 1015 | alternativeMaxWidth = Math.max(alternativeMaxWidth, |
| 1016 | weightedMaxWidth); |
Adam Powell | f8ac6b7 | 2011-05-23 18:14:09 -0700 | [diff] [blame] | 1017 | |
| 1018 | |
| 1019 | // We have no limit, so make all weighted views as tall as the largest child. |
| 1020 | // Children will have already been measured once. |
Adam Powell | eabc919 | 2012-05-04 14:49:46 -0700 | [diff] [blame] | 1021 | if (useLargestChild && heightMode != MeasureSpec.EXACTLY) { |
Adam Powell | f8ac6b7 | 2011-05-23 18:14:09 -0700 | [diff] [blame] | 1022 | for (int i = 0; i < count; i++) { |
| 1023 | final View child = getVirtualChildAt(i); |
Adam Powell | f8ac6b7 | 2011-05-23 18:14:09 -0700 | [diff] [blame] | 1024 | if (child == null || child.getVisibility() == View.GONE) { |
| 1025 | continue; |
| 1026 | } |
| 1027 | |
| 1028 | final LinearLayout.LayoutParams lp = |
| 1029 | (LinearLayout.LayoutParams) child.getLayoutParams(); |
| 1030 | |
| 1031 | float childExtra = lp.weight; |
| 1032 | if (childExtra > 0) { |
| 1033 | child.measure( |
| 1034 | MeasureSpec.makeMeasureSpec(child.getMeasuredWidth(), |
| 1035 | MeasureSpec.EXACTLY), |
| 1036 | MeasureSpec.makeMeasureSpec(largestChildHeight, |
| 1037 | MeasureSpec.EXACTLY)); |
| 1038 | } |
| 1039 | } |
| 1040 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1041 | } |
| 1042 | |
| 1043 | if (!allFillParent && widthMode != MeasureSpec.EXACTLY) { |
| 1044 | maxWidth = alternativeMaxWidth; |
| 1045 | } |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1046 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1047 | maxWidth += mPaddingLeft + mPaddingRight; |
| 1048 | |
| 1049 | // Check against our minimum width |
| 1050 | maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth()); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1051 | |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 1052 | setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, childState), |
| 1053 | heightSizeAndState); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1054 | |
| 1055 | if (matchWidth) { |
| 1056 | forceUniformWidth(count, heightMeasureSpec); |
| 1057 | } |
| 1058 | } |
| 1059 | |
| 1060 | private void forceUniformWidth(int count, int heightMeasureSpec) { |
| 1061 | // Pretend that the linear layout has an exact size. |
| 1062 | int uniformMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), |
| 1063 | MeasureSpec.EXACTLY); |
| 1064 | for (int i = 0; i< count; ++i) { |
| 1065 | final View child = getVirtualChildAt(i); |
Alan Viverette | ad52693 | 2015-12-17 12:42:39 -0500 | [diff] [blame] | 1066 | if (child != null && child.getVisibility() != GONE) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1067 | LinearLayout.LayoutParams lp = ((LinearLayout.LayoutParams)child.getLayoutParams()); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1068 | |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1069 | if (lp.width == LayoutParams.MATCH_PARENT) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1070 | // Temporarily force children to reuse their old measured height |
| 1071 | // FIXME: this may not be right for something like wrapping text? |
| 1072 | int oldHeight = lp.height; |
| 1073 | lp.height = child.getMeasuredHeight(); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1074 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1075 | // Remeasue with new dimensions |
| 1076 | measureChildWithMargins(child, uniformMeasureSpec, 0, heightMeasureSpec, 0); |
| 1077 | lp.height = oldHeight; |
| 1078 | } |
| 1079 | } |
| 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | /** |
| 1084 | * Measures the children when the orientation of this LinearLayout is set |
| 1085 | * to {@link #HORIZONTAL}. |
| 1086 | * |
| 1087 | * @param widthMeasureSpec Horizontal space requirements as imposed by the parent. |
| 1088 | * @param heightMeasureSpec Vertical space requirements as imposed by the parent. |
| 1089 | * |
| 1090 | * @see #getOrientation() |
| 1091 | * @see #setOrientation(int) |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1092 | * @see #onMeasure(int, int) |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1093 | */ |
| 1094 | void measureHorizontal(int widthMeasureSpec, int heightMeasureSpec) { |
| 1095 | mTotalLength = 0; |
| 1096 | int maxHeight = 0; |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 1097 | int childState = 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1098 | int alternativeMaxHeight = 0; |
| 1099 | int weightedMaxHeight = 0; |
| 1100 | boolean allFillParent = true; |
| 1101 | float totalWeight = 0; |
| 1102 | |
| 1103 | final int count = getVirtualChildCount(); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1104 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1105 | final int widthMode = MeasureSpec.getMode(widthMeasureSpec); |
| 1106 | final int heightMode = MeasureSpec.getMode(heightMeasureSpec); |
| 1107 | |
| 1108 | boolean matchHeight = false; |
Alan Viverette | 65be9cc | 2014-02-24 18:21:09 -0800 | [diff] [blame] | 1109 | boolean skippedMeasure = false; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1110 | |
| 1111 | if (mMaxAscent == null || mMaxDescent == null) { |
| 1112 | mMaxAscent = new int[VERTICAL_GRAVITY_COUNT]; |
| 1113 | mMaxDescent = new int[VERTICAL_GRAVITY_COUNT]; |
| 1114 | } |
| 1115 | |
| 1116 | final int[] maxAscent = mMaxAscent; |
| 1117 | final int[] maxDescent = mMaxDescent; |
| 1118 | |
| 1119 | maxAscent[0] = maxAscent[1] = maxAscent[2] = maxAscent[3] = -1; |
| 1120 | maxDescent[0] = maxDescent[1] = maxDescent[2] = maxDescent[3] = -1; |
| 1121 | |
| 1122 | final boolean baselineAligned = mBaselineAligned; |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1123 | final boolean useLargestChild = mUseLargestChild; |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1124 | |
Romain Guy | c352090 | 2010-02-25 11:01:01 -0800 | [diff] [blame] | 1125 | final boolean isExactly = widthMode == MeasureSpec.EXACTLY; |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1126 | |
| 1127 | int largestChildWidth = Integer.MIN_VALUE; |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1128 | int usedExcessSpace = 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1129 | |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 1130 | int nonSkippedChildCount = 0; |
| 1131 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1132 | // See how wide everyone is. Also remember max height. |
| 1133 | for (int i = 0; i < count; ++i) { |
| 1134 | final View child = getVirtualChildAt(i); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1135 | if (child == null) { |
| 1136 | mTotalLength += measureNullChild(i); |
| 1137 | continue; |
| 1138 | } |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1139 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1140 | if (child.getVisibility() == GONE) { |
| 1141 | i += getChildrenSkipCount(child, i); |
| 1142 | continue; |
| 1143 | } |
| 1144 | |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 1145 | nonSkippedChildCount++; |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 1146 | if (hasDividerBeforeChildAt(i)) { |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 1147 | mTotalLength += mDividerWidth; |
| 1148 | } |
| 1149 | |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1150 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
Alan Viverette | 61c41bf | 2016-05-05 17:52:10 +0000 | [diff] [blame] | 1151 | |
| 1152 | totalWeight += lp.weight; |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1153 | |
| 1154 | final boolean useExcessSpace = lp.width == 0 && lp.weight > 0; |
| 1155 | if (widthMode == MeasureSpec.EXACTLY && useExcessSpace) { |
| 1156 | // Optimization: don't bother measuring children who are only |
| 1157 | // laid out using excess space. These views will get measured |
| 1158 | // later if we have space to distribute. |
Romain Guy | c352090 | 2010-02-25 11:01:01 -0800 | [diff] [blame] | 1159 | if (isExactly) { |
| 1160 | mTotalLength += lp.leftMargin + lp.rightMargin; |
| 1161 | } else { |
| 1162 | final int totalLength = mTotalLength; |
| 1163 | mTotalLength = Math.max(totalLength, totalLength + |
| 1164 | lp.leftMargin + lp.rightMargin); |
| 1165 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1166 | |
| 1167 | // Baseline alignment requires to measure widgets to obtain the |
Romain Guy | 6c5664a | 2010-02-24 18:55:22 -0800 | [diff] [blame] | 1168 | // baseline offset (in particular for TextViews). The following |
| 1169 | // defeats the optimization mentioned above. Allow the child to |
| 1170 | // use as much space as it wants because we can shrink things |
| 1171 | // later (and re-measure). |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1172 | if (baselineAligned) { |
Adam Powell | d5dbf4b | 2015-06-11 13:19:24 -0700 | [diff] [blame] | 1173 | final int freeWidthSpec = MeasureSpec.makeSafeMeasureSpec( |
Filip Gruszczynski | b6824bf | 2015-04-13 09:16:25 -0700 | [diff] [blame] | 1174 | MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.UNSPECIFIED); |
Adam Powell | d5dbf4b | 2015-06-11 13:19:24 -0700 | [diff] [blame] | 1175 | final int freeHeightSpec = MeasureSpec.makeSafeMeasureSpec( |
Filip Gruszczynski | b6824bf | 2015-04-13 09:16:25 -0700 | [diff] [blame] | 1176 | MeasureSpec.getSize(heightMeasureSpec), MeasureSpec.UNSPECIFIED); |
| 1177 | child.measure(freeWidthSpec, freeHeightSpec); |
Alan Viverette | 65be9cc | 2014-02-24 18:21:09 -0800 | [diff] [blame] | 1178 | } else { |
| 1179 | skippedMeasure = true; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1180 | } |
| 1181 | } else { |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1182 | if (useExcessSpace) { |
| 1183 | // The widthMode is either UNSPECIFIED or AT_MOST, and |
| 1184 | // this child is only laid out using excess space. Measure |
| 1185 | // using WRAP_CONTENT so that we can find out the view's |
| 1186 | // optimal width. We'll restore the original width of 0 |
| 1187 | // after measurement. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1188 | lp.width = LayoutParams.WRAP_CONTENT; |
| 1189 | } |
| 1190 | |
| 1191 | // Determine how big this child would like to be. If this or |
| 1192 | // previous children have given a weight, then we allow it to |
| 1193 | // use all available space (and we will shrink things later |
| 1194 | // if needed). |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1195 | final int usedWidth = totalWeight == 0 ? mTotalLength : 0; |
| 1196 | measureChildBeforeLayout(child, i, widthMeasureSpec, usedWidth, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1197 | heightMeasureSpec, 0); |
| 1198 | |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1199 | final int childWidth = child.getMeasuredWidth(); |
| 1200 | if (useExcessSpace) { |
| 1201 | // Restore the original width and record how much space |
| 1202 | // we've allocated to excess-only children so that we can |
| 1203 | // match the behavior of EXACTLY measurement. |
| 1204 | lp.width = 0; |
| 1205 | usedExcessSpace += childWidth; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1206 | } |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1207 | |
Romain Guy | c352090 | 2010-02-25 11:01:01 -0800 | [diff] [blame] | 1208 | if (isExactly) { |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1209 | mTotalLength += childWidth + lp.leftMargin + lp.rightMargin |
| 1210 | + getNextLocationOffset(child); |
Romain Guy | c352090 | 2010-02-25 11:01:01 -0800 | [diff] [blame] | 1211 | } else { |
| 1212 | final int totalLength = mTotalLength; |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1213 | mTotalLength = Math.max(totalLength, totalLength + childWidth + lp.leftMargin |
| 1214 | + lp.rightMargin + getNextLocationOffset(child)); |
Romain Guy | c352090 | 2010-02-25 11:01:01 -0800 | [diff] [blame] | 1215 | } |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1216 | |
| 1217 | if (useLargestChild) { |
| 1218 | largestChildWidth = Math.max(childWidth, largestChildWidth); |
| 1219 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1220 | } |
| 1221 | |
| 1222 | boolean matchHeightLocally = false; |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1223 | if (heightMode != MeasureSpec.EXACTLY && lp.height == LayoutParams.MATCH_PARENT) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1224 | // The height of the linear layout will scale, and at least one |
| 1225 | // child said it wanted to match our height. Set a flag indicating that |
| 1226 | // we need to remeasure at least that view when we know our height. |
| 1227 | matchHeight = true; |
| 1228 | matchHeightLocally = true; |
| 1229 | } |
| 1230 | |
| 1231 | final int margin = lp.topMargin + lp.bottomMargin; |
| 1232 | final int childHeight = child.getMeasuredHeight() + margin; |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 1233 | childState = combineMeasuredStates(childState, child.getMeasuredState()); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1234 | |
| 1235 | if (baselineAligned) { |
| 1236 | final int childBaseline = child.getBaseline(); |
| 1237 | if (childBaseline != -1) { |
| 1238 | // Translates the child's vertical gravity into an index |
| 1239 | // in the range 0..VERTICAL_GRAVITY_COUNT |
| 1240 | final int gravity = (lp.gravity < 0 ? mGravity : lp.gravity) |
| 1241 | & Gravity.VERTICAL_GRAVITY_MASK; |
| 1242 | final int index = ((gravity >> Gravity.AXIS_Y_SHIFT) |
| 1243 | & ~Gravity.AXIS_SPECIFIED) >> 1; |
| 1244 | |
| 1245 | maxAscent[index] = Math.max(maxAscent[index], childBaseline); |
| 1246 | maxDescent[index] = Math.max(maxDescent[index], childHeight - childBaseline); |
| 1247 | } |
| 1248 | } |
| 1249 | |
| 1250 | maxHeight = Math.max(maxHeight, childHeight); |
| 1251 | |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1252 | allFillParent = allFillParent && lp.height == LayoutParams.MATCH_PARENT; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1253 | if (lp.weight > 0) { |
| 1254 | /* |
| 1255 | * Heights of weighted Views are bogus if we end up |
| 1256 | * remeasuring, so keep them separate. |
| 1257 | */ |
| 1258 | weightedMaxHeight = Math.max(weightedMaxHeight, |
| 1259 | matchHeightLocally ? margin : childHeight); |
| 1260 | } else { |
| 1261 | alternativeMaxHeight = Math.max(alternativeMaxHeight, |
| 1262 | matchHeightLocally ? margin : childHeight); |
| 1263 | } |
| 1264 | |
| 1265 | i += getChildrenSkipCount(child, i); |
| 1266 | } |
| 1267 | |
Kirill Grouchnikov | 9df0846 | 2016-04-26 15:28:25 -0400 | [diff] [blame] | 1268 | if (nonSkippedChildCount > 0 && hasDividerBeforeChildAt(count)) { |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 1269 | mTotalLength += mDividerWidth; |
| 1270 | } |
| 1271 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1272 | // Check mMaxAscent[INDEX_TOP] first because it maps to Gravity.TOP, |
| 1273 | // the most common case |
| 1274 | if (maxAscent[INDEX_TOP] != -1 || |
| 1275 | maxAscent[INDEX_CENTER_VERTICAL] != -1 || |
| 1276 | maxAscent[INDEX_BOTTOM] != -1 || |
| 1277 | maxAscent[INDEX_FILL] != -1) { |
| 1278 | final int ascent = Math.max(maxAscent[INDEX_FILL], |
| 1279 | Math.max(maxAscent[INDEX_CENTER_VERTICAL], |
| 1280 | Math.max(maxAscent[INDEX_TOP], maxAscent[INDEX_BOTTOM]))); |
| 1281 | final int descent = Math.max(maxDescent[INDEX_FILL], |
| 1282 | Math.max(maxDescent[INDEX_CENTER_VERTICAL], |
| 1283 | Math.max(maxDescent[INDEX_TOP], maxDescent[INDEX_BOTTOM]))); |
| 1284 | maxHeight = Math.max(maxHeight, ascent + descent); |
| 1285 | } |
| 1286 | |
Adam Powell | f8ac6b7 | 2011-05-23 18:14:09 -0700 | [diff] [blame] | 1287 | if (useLargestChild && |
| 1288 | (widthMode == MeasureSpec.AT_MOST || widthMode == MeasureSpec.UNSPECIFIED)) { |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1289 | mTotalLength = 0; |
| 1290 | |
| 1291 | for (int i = 0; i < count; ++i) { |
| 1292 | final View child = getVirtualChildAt(i); |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1293 | if (child == null) { |
| 1294 | mTotalLength += measureNullChild(i); |
| 1295 | continue; |
| 1296 | } |
| 1297 | |
| 1298 | if (child.getVisibility() == GONE) { |
| 1299 | i += getChildrenSkipCount(child, i); |
| 1300 | continue; |
| 1301 | } |
| 1302 | |
| 1303 | final LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) |
| 1304 | child.getLayoutParams(); |
Romain Guy | c352090 | 2010-02-25 11:01:01 -0800 | [diff] [blame] | 1305 | if (isExactly) { |
| 1306 | mTotalLength += largestChildWidth + lp.leftMargin + lp.rightMargin + |
| 1307 | getNextLocationOffset(child); |
| 1308 | } else { |
| 1309 | final int totalLength = mTotalLength; |
| 1310 | mTotalLength = Math.max(totalLength, totalLength + largestChildWidth + |
| 1311 | lp.leftMargin + lp.rightMargin + getNextLocationOffset(child)); |
| 1312 | } |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1313 | } |
| 1314 | } |
| 1315 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1316 | // Add in our padding |
| 1317 | mTotalLength += mPaddingLeft + mPaddingRight; |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1318 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1319 | int widthSize = mTotalLength; |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1320 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1321 | // Check against our minimum width |
| 1322 | widthSize = Math.max(widthSize, getSuggestedMinimumWidth()); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1323 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1324 | // Reconcile our calculated size with the widthMeasureSpec |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 1325 | int widthSizeAndState = resolveSizeAndState(widthSize, widthMeasureSpec, 0); |
| 1326 | widthSize = widthSizeAndState & MEASURED_SIZE_MASK; |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1327 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1328 | // Either expand children with weight to take up available space or |
Alan Viverette | 65be9cc | 2014-02-24 18:21:09 -0800 | [diff] [blame] | 1329 | // shrink them if they extend beyond our current bounds. If we skipped |
| 1330 | // measurement on any children, we need to measure them now. |
Alan Viverette | 918f886 | 2016-03-17 12:28:31 -0400 | [diff] [blame] | 1331 | int remainingExcess = widthSize - mTotalLength |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1332 | + (mAllowInconsistentMeasurement ? 0 : usedExcessSpace); |
Chet Haase | cb84888 | 2018-03-21 14:09:44 -0700 | [diff] [blame] | 1333 | if (skippedMeasure |
| 1334 | || ((sRemeasureWeightedChildren || remainingExcess != 0) && totalWeight > 0.0f)) { |
Alan Viverette | 918f886 | 2016-03-17 12:28:31 -0400 | [diff] [blame] | 1335 | float remainingWeightSum = mWeightSum > 0.0f ? mWeightSum : totalWeight; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1336 | |
| 1337 | maxAscent[0] = maxAscent[1] = maxAscent[2] = maxAscent[3] = -1; |
| 1338 | maxDescent[0] = maxDescent[1] = maxDescent[2] = maxDescent[3] = -1; |
| 1339 | maxHeight = -1; |
| 1340 | |
| 1341 | mTotalLength = 0; |
| 1342 | |
| 1343 | for (int i = 0; i < count; ++i) { |
| 1344 | final View child = getVirtualChildAt(i); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1345 | if (child == null || child.getVisibility() == View.GONE) { |
| 1346 | continue; |
| 1347 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1348 | |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1349 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
Alan Viverette | 918f886 | 2016-03-17 12:28:31 -0400 | [diff] [blame] | 1350 | final float childWeight = lp.weight; |
| 1351 | if (childWeight > 0) { |
Alan Viverette | 61c41bf | 2016-05-05 17:52:10 +0000 | [diff] [blame] | 1352 | final int share = (int) (childWeight * remainingExcess / remainingWeightSum); |
Alan Viverette | 918f886 | 2016-03-17 12:28:31 -0400 | [diff] [blame] | 1353 | remainingExcess -= share; |
| 1354 | remainingWeightSum -= childWeight; |
| 1355 | |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1356 | final int childWidth; |
Alan Viverette | 070b22b | 2016-06-30 11:15:36 -0400 | [diff] [blame] | 1357 | if (mUseLargestChild && widthMode != MeasureSpec.EXACTLY) { |
| 1358 | childWidth = largestChildWidth; |
| 1359 | } else if (lp.width == 0 && (!mAllowInconsistentMeasurement |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1360 | || widthMode == MeasureSpec.EXACTLY)) { |
| 1361 | // This child needs to be laid out from scratch using |
| 1362 | // only its share of excess space. |
| 1363 | childWidth = share; |
| 1364 | } else { |
| 1365 | // This child had some intrinsic width to which we |
| 1366 | // need to add its share of excess space. |
| 1367 | childWidth = child.getMeasuredWidth() + share; |
| 1368 | } |
Alan Viverette | 5a969df | 2015-07-31 12:42:10 -0400 | [diff] [blame] | 1369 | |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1370 | final int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec( |
| 1371 | Math.max(0, childWidth), MeasureSpec.EXACTLY); |
| 1372 | final int childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1373 | mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin, |
| 1374 | lp.height); |
Alan Viverette | 40e1df3 | 2015-08-25 16:50:27 -0400 | [diff] [blame] | 1375 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 1376 | |
| 1377 | // Child may now not fit in horizontal dimension. |
| 1378 | childState = combineMeasuredStates(childState, |
| 1379 | child.getMeasuredState() & MEASURED_STATE_MASK); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1380 | } |
| 1381 | |
Romain Guy | c352090 | 2010-02-25 11:01:01 -0800 | [diff] [blame] | 1382 | if (isExactly) { |
| 1383 | mTotalLength += child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin + |
| 1384 | getNextLocationOffset(child); |
| 1385 | } else { |
| 1386 | final int totalLength = mTotalLength; |
| 1387 | mTotalLength = Math.max(totalLength, totalLength + child.getMeasuredWidth() + |
| 1388 | lp.leftMargin + lp.rightMargin + getNextLocationOffset(child)); |
| 1389 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1390 | |
| 1391 | boolean matchHeightLocally = heightMode != MeasureSpec.EXACTLY && |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1392 | lp.height == LayoutParams.MATCH_PARENT; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1393 | |
| 1394 | final int margin = lp.topMargin + lp .bottomMargin; |
| 1395 | int childHeight = child.getMeasuredHeight() + margin; |
| 1396 | maxHeight = Math.max(maxHeight, childHeight); |
| 1397 | alternativeMaxHeight = Math.max(alternativeMaxHeight, |
| 1398 | matchHeightLocally ? margin : childHeight); |
| 1399 | |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1400 | allFillParent = allFillParent && lp.height == LayoutParams.MATCH_PARENT; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1401 | |
| 1402 | if (baselineAligned) { |
| 1403 | final int childBaseline = child.getBaseline(); |
| 1404 | if (childBaseline != -1) { |
| 1405 | // Translates the child's vertical gravity into an index in the range 0..2 |
| 1406 | final int gravity = (lp.gravity < 0 ? mGravity : lp.gravity) |
| 1407 | & Gravity.VERTICAL_GRAVITY_MASK; |
| 1408 | final int index = ((gravity >> Gravity.AXIS_Y_SHIFT) |
| 1409 | & ~Gravity.AXIS_SPECIFIED) >> 1; |
| 1410 | |
| 1411 | maxAscent[index] = Math.max(maxAscent[index], childBaseline); |
| 1412 | maxDescent[index] = Math.max(maxDescent[index], |
| 1413 | childHeight - childBaseline); |
| 1414 | } |
| 1415 | } |
| 1416 | } |
| 1417 | |
| 1418 | // Add in our padding |
| 1419 | mTotalLength += mPaddingLeft + mPaddingRight; |
Romain Guy | 053b480 | 2010-02-05 15:34:33 -0800 | [diff] [blame] | 1420 | // TODO: Should we update widthSize with the new total length? |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1421 | |
| 1422 | // Check mMaxAscent[INDEX_TOP] first because it maps to Gravity.TOP, |
| 1423 | // the most common case |
| 1424 | if (maxAscent[INDEX_TOP] != -1 || |
| 1425 | maxAscent[INDEX_CENTER_VERTICAL] != -1 || |
| 1426 | maxAscent[INDEX_BOTTOM] != -1 || |
| 1427 | maxAscent[INDEX_FILL] != -1) { |
| 1428 | final int ascent = Math.max(maxAscent[INDEX_FILL], |
| 1429 | Math.max(maxAscent[INDEX_CENTER_VERTICAL], |
| 1430 | Math.max(maxAscent[INDEX_TOP], maxAscent[INDEX_BOTTOM]))); |
| 1431 | final int descent = Math.max(maxDescent[INDEX_FILL], |
| 1432 | Math.max(maxDescent[INDEX_CENTER_VERTICAL], |
| 1433 | Math.max(maxDescent[INDEX_TOP], maxDescent[INDEX_BOTTOM]))); |
| 1434 | maxHeight = Math.max(maxHeight, ascent + descent); |
| 1435 | } |
| 1436 | } else { |
| 1437 | alternativeMaxHeight = Math.max(alternativeMaxHeight, weightedMaxHeight); |
Adam Powell | f8ac6b7 | 2011-05-23 18:14:09 -0700 | [diff] [blame] | 1438 | |
| 1439 | // We have no limit, so make all weighted views as wide as the largest child. |
| 1440 | // Children will have already been measured once. |
Adam Powell | eabc919 | 2012-05-04 14:49:46 -0700 | [diff] [blame] | 1441 | if (useLargestChild && widthMode != MeasureSpec.EXACTLY) { |
Adam Powell | f8ac6b7 | 2011-05-23 18:14:09 -0700 | [diff] [blame] | 1442 | for (int i = 0; i < count; i++) { |
| 1443 | final View child = getVirtualChildAt(i); |
Adam Powell | f8ac6b7 | 2011-05-23 18:14:09 -0700 | [diff] [blame] | 1444 | if (child == null || child.getVisibility() == View.GONE) { |
| 1445 | continue; |
| 1446 | } |
| 1447 | |
| 1448 | final LinearLayout.LayoutParams lp = |
| 1449 | (LinearLayout.LayoutParams) child.getLayoutParams(); |
| 1450 | |
| 1451 | float childExtra = lp.weight; |
| 1452 | if (childExtra > 0) { |
| 1453 | child.measure( |
| 1454 | MeasureSpec.makeMeasureSpec(largestChildWidth, MeasureSpec.EXACTLY), |
| 1455 | MeasureSpec.makeMeasureSpec(child.getMeasuredHeight(), |
| 1456 | MeasureSpec.EXACTLY)); |
| 1457 | } |
| 1458 | } |
| 1459 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1460 | } |
| 1461 | |
| 1462 | if (!allFillParent && heightMode != MeasureSpec.EXACTLY) { |
| 1463 | maxHeight = alternativeMaxHeight; |
| 1464 | } |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1465 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1466 | maxHeight += mPaddingTop + mPaddingBottom; |
| 1467 | |
| 1468 | // Check against our minimum height |
| 1469 | maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight()); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1470 | |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 1471 | setMeasuredDimension(widthSizeAndState | (childState&MEASURED_STATE_MASK), |
| 1472 | resolveSizeAndState(maxHeight, heightMeasureSpec, |
| 1473 | (childState<<MEASURED_HEIGHT_STATE_SHIFT))); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1474 | |
| 1475 | if (matchHeight) { |
| 1476 | forceUniformHeight(count, widthMeasureSpec); |
| 1477 | } |
| 1478 | } |
| 1479 | |
| 1480 | private void forceUniformHeight(int count, int widthMeasureSpec) { |
| 1481 | // Pretend that the linear layout has an exact size. This is the measured height of |
| 1482 | // ourselves. The measured height should be the max height of the children, changed |
Fabrice Di Meglio | fc53e58 | 2012-10-25 11:45:04 -0700 | [diff] [blame] | 1483 | // to accommodate the heightMeasureSpec from the parent |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1484 | int uniformMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), |
| 1485 | MeasureSpec.EXACTLY); |
| 1486 | for (int i = 0; i < count; ++i) { |
| 1487 | final View child = getVirtualChildAt(i); |
Alan Viverette | ad52693 | 2015-12-17 12:42:39 -0500 | [diff] [blame] | 1488 | if (child != null && child.getVisibility() != GONE) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1489 | LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) child.getLayoutParams(); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1490 | |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1491 | if (lp.height == LayoutParams.MATCH_PARENT) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1492 | // Temporarily force children to reuse their old measured width |
| 1493 | // FIXME: this may not be right for something like wrapping text? |
| 1494 | int oldWidth = lp.width; |
| 1495 | lp.width = child.getMeasuredWidth(); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1496 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1497 | // Remeasure with new dimensions |
| 1498 | measureChildWithMargins(child, widthMeasureSpec, 0, uniformMeasureSpec, 0); |
| 1499 | lp.width = oldWidth; |
| 1500 | } |
| 1501 | } |
| 1502 | } |
| 1503 | } |
| 1504 | |
| 1505 | /** |
| 1506 | * <p>Returns the number of children to skip after measuring/laying out |
| 1507 | * the specified child.</p> |
| 1508 | * |
| 1509 | * @param child the child after which we want to skip children |
| 1510 | * @param index the index of the child after which we want to skip children |
| 1511 | * @return the number of children to skip, 0 by default |
| 1512 | */ |
| 1513 | int getChildrenSkipCount(View child, int index) { |
| 1514 | return 0; |
| 1515 | } |
| 1516 | |
| 1517 | /** |
| 1518 | * <p>Returns the size (width or height) that should be occupied by a null |
| 1519 | * child.</p> |
| 1520 | * |
| 1521 | * @param childIndex the index of the null child |
| 1522 | * @return the width or height of the child depending on the orientation |
| 1523 | */ |
| 1524 | int measureNullChild(int childIndex) { |
| 1525 | return 0; |
| 1526 | } |
| 1527 | |
| 1528 | /** |
| 1529 | * <p>Measure the child according to the parent's measure specs. This |
kopriva | debd4ee | 2018-09-13 10:59:46 -0700 | [diff] [blame] | 1530 | * method should be overridden by subclasses to force the sizing of |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1531 | * children. This method is called by {@link #measureVertical(int, int)} and |
| 1532 | * {@link #measureHorizontal(int, int)}.</p> |
| 1533 | * |
| 1534 | * @param child the child to measure |
| 1535 | * @param childIndex the index of the child in this view |
| 1536 | * @param widthMeasureSpec horizontal space requirements as imposed by the parent |
| 1537 | * @param totalWidth extra space that has been used up by the parent horizontally |
| 1538 | * @param heightMeasureSpec vertical space requirements as imposed by the parent |
| 1539 | * @param totalHeight extra space that has been used up by the parent vertically |
| 1540 | */ |
| 1541 | void measureChildBeforeLayout(View child, int childIndex, |
| 1542 | int widthMeasureSpec, int totalWidth, int heightMeasureSpec, |
| 1543 | int totalHeight) { |
| 1544 | measureChildWithMargins(child, widthMeasureSpec, totalWidth, |
| 1545 | heightMeasureSpec, totalHeight); |
| 1546 | } |
| 1547 | |
| 1548 | /** |
| 1549 | * <p>Return the location offset of the specified child. This can be used |
| 1550 | * by subclasses to change the location of a given widget.</p> |
| 1551 | * |
| 1552 | * @param child the child for which to obtain the location offset |
| 1553 | * @return the location offset in pixels |
| 1554 | */ |
| 1555 | int getLocationOffset(View child) { |
| 1556 | return 0; |
| 1557 | } |
| 1558 | |
| 1559 | /** |
| 1560 | * <p>Return the size offset of the next sibling of the specified child. |
| 1561 | * This can be used by subclasses to change the location of the widget |
| 1562 | * following <code>child</code>.</p> |
| 1563 | * |
| 1564 | * @param child the child whose next sibling will be moved |
| 1565 | * @return the location offset of the next child in pixels |
| 1566 | */ |
| 1567 | int getNextLocationOffset(View child) { |
| 1568 | return 0; |
| 1569 | } |
| 1570 | |
| 1571 | @Override |
| 1572 | protected void onLayout(boolean changed, int l, int t, int r, int b) { |
| 1573 | if (mOrientation == VERTICAL) { |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1574 | layoutVertical(l, t, r, b); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1575 | } else { |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1576 | layoutHorizontal(l, t, r, b); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1577 | } |
| 1578 | } |
| 1579 | |
| 1580 | /** |
| 1581 | * Position the children during a layout pass if the orientation of this |
| 1582 | * LinearLayout is set to {@link #VERTICAL}. |
| 1583 | * |
| 1584 | * @see #getOrientation() |
| 1585 | * @see #setOrientation(int) |
| 1586 | * @see #onLayout(boolean, int, int, int, int) |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1587 | * @param left |
| 1588 | * @param top |
| 1589 | * @param right |
| 1590 | * @param bottom |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1591 | */ |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1592 | void layoutVertical(int left, int top, int right, int bottom) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1593 | final int paddingLeft = mPaddingLeft; |
| 1594 | |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1595 | int childTop; |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1596 | int childLeft; |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1597 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1598 | // Where right end of child should go |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1599 | final int width = right - left; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1600 | int childRight = width - mPaddingRight; |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1601 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1602 | // Space available for child |
| 1603 | int childSpace = width - paddingLeft - mPaddingRight; |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1604 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1605 | final int count = getVirtualChildCount(); |
| 1606 | |
| 1607 | final int majorGravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK; |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 1608 | final int minorGravity = mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1609 | |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1610 | switch (majorGravity) { |
| 1611 | case Gravity.BOTTOM: |
| 1612 | // mTotalLength contains the padding already |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1613 | childTop = mPaddingTop + bottom - top - mTotalLength; |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1614 | break; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1615 | |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1616 | // mTotalLength contains the padding already |
| 1617 | case Gravity.CENTER_VERTICAL: |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1618 | childTop = mPaddingTop + (bottom - top - mTotalLength) / 2; |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1619 | break; |
| 1620 | |
| 1621 | case Gravity.TOP: |
| 1622 | default: |
| 1623 | childTop = mPaddingTop; |
| 1624 | break; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1625 | } |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 1626 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1627 | for (int i = 0; i < count; i++) { |
| 1628 | final View child = getVirtualChildAt(i); |
| 1629 | if (child == null) { |
| 1630 | childTop += measureNullChild(i); |
| 1631 | } else if (child.getVisibility() != GONE) { |
| 1632 | final int childWidth = child.getMeasuredWidth(); |
| 1633 | final int childHeight = child.getMeasuredHeight(); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1634 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1635 | final LinearLayout.LayoutParams lp = |
| 1636 | (LinearLayout.LayoutParams) child.getLayoutParams(); |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1637 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1638 | int gravity = lp.gravity; |
| 1639 | if (gravity < 0) { |
| 1640 | gravity = minorGravity; |
| 1641 | } |
Fabrice Di Meglio | e56ffdc | 2012-09-23 14:51:16 -0700 | [diff] [blame] | 1642 | final int layoutDirection = getLayoutDirection(); |
Fabrice Di Meglio | c005322 | 2011-06-13 12:16:51 -0700 | [diff] [blame] | 1643 | final int absoluteGravity = Gravity.getAbsoluteGravity(gravity, layoutDirection); |
Fabrice Di Meglio | de35cee | 2011-06-01 15:13:50 -0700 | [diff] [blame] | 1644 | switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1645 | case Gravity.CENTER_HORIZONTAL: |
| 1646 | childLeft = paddingLeft + ((childSpace - childWidth) / 2) |
| 1647 | + lp.leftMargin - lp.rightMargin; |
| 1648 | break; |
| 1649 | |
| 1650 | case Gravity.RIGHT: |
| 1651 | childLeft = childRight - childWidth - lp.rightMargin; |
| 1652 | break; |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1653 | |
| 1654 | case Gravity.LEFT: |
Romain Guy | 611cd3f | 2009-12-15 12:00:37 -0800 | [diff] [blame] | 1655 | default: |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1656 | childLeft = paddingLeft + lp.leftMargin; |
Romain Guy | 611cd3f | 2009-12-15 12:00:37 -0800 | [diff] [blame] | 1657 | break; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1658 | } |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1659 | |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 1660 | if (hasDividerBeforeChildAt(i)) { |
| 1661 | childTop += mDividerHeight; |
| 1662 | } |
| 1663 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1664 | childTop += lp.topMargin; |
| 1665 | setChildFrame(child, childLeft, childTop + getLocationOffset(child), |
| 1666 | childWidth, childHeight); |
| 1667 | childTop += childHeight + lp.bottomMargin + getNextLocationOffset(child); |
| 1668 | |
| 1669 | i += getChildrenSkipCount(child, i); |
| 1670 | } |
| 1671 | } |
| 1672 | } |
| 1673 | |
Selim Cinek | 78528b2 | 2015-06-02 17:33:09 +0200 | [diff] [blame] | 1674 | @Override |
| 1675 | public void onRtlPropertiesChanged(@ResolvedLayoutDir int layoutDirection) { |
| 1676 | super.onRtlPropertiesChanged(layoutDirection); |
| 1677 | if (layoutDirection != mLayoutDirection) { |
| 1678 | mLayoutDirection = layoutDirection; |
| 1679 | if (mOrientation == HORIZONTAL) { |
| 1680 | requestLayout(); |
| 1681 | } |
| 1682 | } |
| 1683 | } |
| 1684 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1685 | /** |
| 1686 | * Position the children during a layout pass if the orientation of this |
| 1687 | * LinearLayout is set to {@link #HORIZONTAL}. |
| 1688 | * |
| 1689 | * @see #getOrientation() |
| 1690 | * @see #setOrientation(int) |
| 1691 | * @see #onLayout(boolean, int, int, int, int) |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1692 | * @param left |
| 1693 | * @param top |
| 1694 | * @param right |
| 1695 | * @param bottom |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1696 | */ |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1697 | void layoutHorizontal(int left, int top, int right, int bottom) { |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1698 | final boolean isLayoutRtl = isLayoutRtl(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1699 | final int paddingTop = mPaddingTop; |
| 1700 | |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1701 | int childTop; |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1702 | int childLeft; |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1703 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1704 | // Where bottom of child should go |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1705 | final int height = bottom - top; |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1706 | int childBottom = height - mPaddingBottom; |
| 1707 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1708 | // Space available for child |
| 1709 | int childSpace = height - paddingTop - mPaddingBottom; |
| 1710 | |
| 1711 | final int count = getVirtualChildCount(); |
| 1712 | |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 1713 | final int majorGravity = mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1714 | final int minorGravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK; |
| 1715 | |
| 1716 | final boolean baselineAligned = mBaselineAligned; |
| 1717 | |
| 1718 | final int[] maxAscent = mMaxAscent; |
| 1719 | final int[] maxDescent = mMaxDescent; |
| 1720 | |
Fabrice Di Meglio | e56ffdc | 2012-09-23 14:51:16 -0700 | [diff] [blame] | 1721 | final int layoutDirection = getLayoutDirection(); |
Fabrice Di Meglio | c005322 | 2011-06-13 12:16:51 -0700 | [diff] [blame] | 1722 | switch (Gravity.getAbsoluteGravity(majorGravity, layoutDirection)) { |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1723 | case Gravity.RIGHT: |
| 1724 | // mTotalLength contains the padding already |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1725 | childLeft = mPaddingLeft + right - left - mTotalLength; |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1726 | break; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1727 | |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1728 | case Gravity.CENTER_HORIZONTAL: |
| 1729 | // mTotalLength contains the padding already |
Philip Milne | ad365cc | 2012-09-27 14:38:46 -0700 | [diff] [blame] | 1730 | childLeft = mPaddingLeft + (right - left - mTotalLength) / 2; |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1731 | break; |
| 1732 | |
| 1733 | case Gravity.LEFT: |
| 1734 | default: |
| 1735 | childLeft = mPaddingLeft; |
| 1736 | break; |
| 1737 | } |
| 1738 | |
| 1739 | int start = 0; |
| 1740 | int dir = 1; |
| 1741 | //In case of RTL, start drawing from the last child. |
| 1742 | if (isLayoutRtl) { |
| 1743 | start = count - 1; |
| 1744 | dir = -1; |
Adam Powell | fcca00a | 2010-11-30 21:26:29 -0800 | [diff] [blame] | 1745 | } |
| 1746 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1747 | for (int i = 0; i < count; i++) { |
Alan Viverette | ad52693 | 2015-12-17 12:42:39 -0500 | [diff] [blame] | 1748 | final int childIndex = start + dir * i; |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1749 | final View child = getVirtualChildAt(childIndex); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1750 | if (child == null) { |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1751 | childLeft += measureNullChild(childIndex); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1752 | } else if (child.getVisibility() != GONE) { |
| 1753 | final int childWidth = child.getMeasuredWidth(); |
| 1754 | final int childHeight = child.getMeasuredHeight(); |
| 1755 | int childBaseline = -1; |
| 1756 | |
| 1757 | final LinearLayout.LayoutParams lp = |
| 1758 | (LinearLayout.LayoutParams) child.getLayoutParams(); |
| 1759 | |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1760 | if (baselineAligned && lp.height != LayoutParams.MATCH_PARENT) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1761 | childBaseline = child.getBaseline(); |
| 1762 | } |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1763 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1764 | int gravity = lp.gravity; |
| 1765 | if (gravity < 0) { |
| 1766 | gravity = minorGravity; |
| 1767 | } |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1768 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1769 | switch (gravity & Gravity.VERTICAL_GRAVITY_MASK) { |
| 1770 | case Gravity.TOP: |
| 1771 | childTop = paddingTop + lp.topMargin; |
| 1772 | if (childBaseline != -1) { |
| 1773 | childTop += maxAscent[INDEX_TOP] - childBaseline; |
| 1774 | } |
| 1775 | break; |
| 1776 | |
| 1777 | case Gravity.CENTER_VERTICAL: |
Romain Guy | 5b1b241 | 2010-01-21 19:09:51 -0800 | [diff] [blame] | 1778 | // Removed support for baseline alignment when layout_gravity or |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1779 | // gravity == center_vertical. See bug #1038483. |
| 1780 | // Keep the code around if we need to re-enable this feature |
| 1781 | // if (childBaseline != -1) { |
| 1782 | // // Align baselines vertically only if the child is smaller than us |
| 1783 | // if (childSpace - childHeight > 0) { |
| 1784 | // childTop = paddingTop + (childSpace / 2) - childBaseline; |
| 1785 | // } else { |
| 1786 | // childTop = paddingTop + (childSpace - childHeight) / 2; |
| 1787 | // } |
| 1788 | // } else { |
| 1789 | childTop = paddingTop + ((childSpace - childHeight) / 2) |
| 1790 | + lp.topMargin - lp.bottomMargin; |
| 1791 | break; |
| 1792 | |
| 1793 | case Gravity.BOTTOM: |
| 1794 | childTop = childBottom - childHeight - lp.bottomMargin; |
| 1795 | if (childBaseline != -1) { |
| 1796 | int descent = child.getMeasuredHeight() - childBaseline; |
| 1797 | childTop -= (maxDescent[INDEX_BOTTOM] - descent); |
| 1798 | } |
| 1799 | break; |
Romain Guy | 611cd3f | 2009-12-15 12:00:37 -0800 | [diff] [blame] | 1800 | default: |
| 1801 | childTop = paddingTop; |
| 1802 | break; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1803 | } |
| 1804 | |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1805 | if (hasDividerBeforeChildAt(childIndex)) { |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 1806 | childLeft += mDividerWidth; |
| 1807 | } |
| 1808 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1809 | childLeft += lp.leftMargin; |
| 1810 | setChildFrame(child, childLeft + getLocationOffset(child), childTop, |
| 1811 | childWidth, childHeight); |
| 1812 | childLeft += childWidth + lp.rightMargin + |
| 1813 | getNextLocationOffset(child); |
| 1814 | |
Fabrice Di Meglio | 1e4cfbe | 2010-04-01 15:46:27 -0700 | [diff] [blame] | 1815 | i += getChildrenSkipCount(child, childIndex); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1816 | } |
| 1817 | } |
| 1818 | } |
| 1819 | |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1820 | private void setChildFrame(View child, int left, int top, int width, int height) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1821 | child.layout(left, top, left + width, top + height); |
| 1822 | } |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1823 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1824 | /** |
| 1825 | * Should the layout be a column or a row. |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 1826 | * @param orientation Pass {@link #HORIZONTAL} or {@link #VERTICAL}. Default |
| 1827 | * value is {@link #HORIZONTAL}. |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1828 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1829 | * @attr ref android.R.styleable#LinearLayout_orientation |
| 1830 | */ |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 1831 | public void setOrientation(@OrientationMode int orientation) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1832 | if (mOrientation != orientation) { |
| 1833 | mOrientation = orientation; |
| 1834 | requestLayout(); |
| 1835 | } |
| 1836 | } |
| 1837 | |
| 1838 | /** |
| 1839 | * Returns the current orientation. |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1840 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1841 | * @return either {@link #HORIZONTAL} or {@link #VERTICAL} |
| 1842 | */ |
Tor Norbye | d9273d6 | 2013-05-30 15:59:53 -0700 | [diff] [blame] | 1843 | @OrientationMode |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1844 | public int getOrientation() { |
| 1845 | return mOrientation; |
| 1846 | } |
| 1847 | |
| 1848 | /** |
| 1849 | * Describes how the child views are positioned. Defaults to GRAVITY_TOP. If |
| 1850 | * this layout has a VERTICAL orientation, this controls where all the child |
| 1851 | * views are placed if there is extra vertical space. If this layout has a |
| 1852 | * HORIZONTAL orientation, this controls the alignment of the children. |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1853 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1854 | * @param gravity See {@link android.view.Gravity} |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1855 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1856 | * @attr ref android.R.styleable#LinearLayout_gravity |
| 1857 | */ |
| 1858 | @android.view.RemotableViewMethod |
| 1859 | public void setGravity(int gravity) { |
| 1860 | if (mGravity != gravity) { |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 1861 | if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) { |
Fabrice Di Meglio | 9e3b002 | 2011-06-06 16:30:29 -0700 | [diff] [blame] | 1862 | gravity |= Gravity.START; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1863 | } |
| 1864 | |
| 1865 | if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) { |
| 1866 | gravity |= Gravity.TOP; |
| 1867 | } |
| 1868 | |
| 1869 | mGravity = gravity; |
| 1870 | requestLayout(); |
| 1871 | } |
| 1872 | } |
| 1873 | |
Jason Monk | efe916c | 2016-01-20 10:46:12 -0500 | [diff] [blame] | 1874 | /** |
| 1875 | * Returns the current gravity. See {@link android.view.Gravity} |
| 1876 | * |
| 1877 | * @return the current gravity. |
| 1878 | * @see #setGravity |
| 1879 | */ |
| 1880 | public int getGravity() { |
| 1881 | return mGravity; |
| 1882 | } |
| 1883 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1884 | @android.view.RemotableViewMethod |
| 1885 | public void setHorizontalGravity(int horizontalGravity) { |
Fabrice Di Meglio | 6a03640 | 2011-05-23 14:43:23 -0700 | [diff] [blame] | 1886 | final int gravity = horizontalGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK; |
| 1887 | if ((mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) != gravity) { |
| 1888 | mGravity = (mGravity & ~Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) | gravity; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1889 | requestLayout(); |
| 1890 | } |
| 1891 | } |
| 1892 | |
| 1893 | @android.view.RemotableViewMethod |
| 1894 | public void setVerticalGravity(int verticalGravity) { |
| 1895 | final int gravity = verticalGravity & Gravity.VERTICAL_GRAVITY_MASK; |
| 1896 | if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != gravity) { |
| 1897 | mGravity = (mGravity & ~Gravity.VERTICAL_GRAVITY_MASK) | gravity; |
| 1898 | requestLayout(); |
| 1899 | } |
| 1900 | } |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1901 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1902 | @Override |
| 1903 | public LayoutParams generateLayoutParams(AttributeSet attrs) { |
| 1904 | return new LinearLayout.LayoutParams(getContext(), attrs); |
| 1905 | } |
| 1906 | |
| 1907 | /** |
| 1908 | * Returns a set of layout parameters with a width of |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1909 | * {@link android.view.ViewGroup.LayoutParams#MATCH_PARENT} |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1910 | * and a height of {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT} |
| 1911 | * when the layout's orientation is {@link #VERTICAL}. When the orientation is |
| 1912 | * {@link #HORIZONTAL}, the width is set to {@link LayoutParams#WRAP_CONTENT} |
| 1913 | * and the height to {@link LayoutParams#WRAP_CONTENT}. |
| 1914 | */ |
| 1915 | @Override |
| 1916 | protected LayoutParams generateDefaultLayoutParams() { |
| 1917 | if (mOrientation == HORIZONTAL) { |
| 1918 | return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); |
| 1919 | } else if (mOrientation == VERTICAL) { |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 1920 | return new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1921 | } |
| 1922 | return null; |
| 1923 | } |
| 1924 | |
| 1925 | @Override |
Yigit Boyar | 885c50b | 2016-03-22 16:53:42 -0700 | [diff] [blame] | 1926 | protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams lp) { |
Yigit Boyar | 2dd20a6 | 2016-08-01 17:42:28 -0700 | [diff] [blame] | 1927 | if (sPreserveMarginParamsInLayoutParamConversion) { |
| 1928 | if (lp instanceof LayoutParams) { |
| 1929 | return new LayoutParams((LayoutParams) lp); |
| 1930 | } else if (lp instanceof MarginLayoutParams) { |
| 1931 | return new LayoutParams((MarginLayoutParams) lp); |
| 1932 | } |
Yigit Boyar | 885c50b | 2016-03-22 16:53:42 -0700 | [diff] [blame] | 1933 | } |
Yigit Boyar | 2dd20a6 | 2016-08-01 17:42:28 -0700 | [diff] [blame] | 1934 | return new LayoutParams(lp); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1935 | } |
| 1936 | |
| 1937 | |
| 1938 | // Override to allow type-checking of LayoutParams. |
| 1939 | @Override |
| 1940 | protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { |
| 1941 | return p instanceof LinearLayout.LayoutParams; |
| 1942 | } |
Svetoslav Ganov | 8a78fd4 | 2012-01-17 14:36:46 -0800 | [diff] [blame] | 1943 | |
| 1944 | @Override |
Dianne Hackborn | a7bb6fb | 2015-02-03 18:13:40 -0800 | [diff] [blame] | 1945 | public CharSequence getAccessibilityClassName() { |
| 1946 | return LinearLayout.class.getName(); |
Svetoslav Ganov | 8a78fd4 | 2012-01-17 14:36:46 -0800 | [diff] [blame] | 1947 | } |
| 1948 | |
Siva Velusamy | 94a6d15 | 2015-05-05 15:07:00 -0700 | [diff] [blame] | 1949 | /** @hide */ |
| 1950 | @Override |
| 1951 | protected void encodeProperties(@NonNull ViewHierarchyEncoder encoder) { |
| 1952 | super.encodeProperties(encoder); |
| 1953 | encoder.addProperty("layout:baselineAligned", mBaselineAligned); |
| 1954 | encoder.addProperty("layout:baselineAlignedChildIndex", mBaselineAlignedChildIndex); |
| 1955 | encoder.addProperty("measurement:baselineChildTop", mBaselineChildTop); |
| 1956 | encoder.addProperty("measurement:orientation", mOrientation); |
| 1957 | encoder.addProperty("measurement:gravity", mGravity); |
| 1958 | encoder.addProperty("measurement:totalLength", mTotalLength); |
| 1959 | encoder.addProperty("layout:totalLength", mTotalLength); |
| 1960 | encoder.addProperty("layout:useLargestChild", mUseLargestChild); |
| 1961 | } |
| 1962 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1963 | /** |
| 1964 | * Per-child layout information associated with ViewLinearLayout. |
Aurimas Liutikas | 99441c5 | 2016-10-11 16:48:32 -0700 | [diff] [blame] | 1965 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1966 | * @attr ref android.R.styleable#LinearLayout_Layout_layout_weight |
| 1967 | * @attr ref android.R.styleable#LinearLayout_Layout_layout_gravity |
| 1968 | */ |
| 1969 | public static class LayoutParams extends ViewGroup.MarginLayoutParams { |
| 1970 | /** |
| 1971 | * Indicates how much of the extra space in the LinearLayout will be |
| 1972 | * allocated to the view associated with these LayoutParams. Specify |
| 1973 | * 0 if the view should not be stretched. Otherwise the extra pixels |
| 1974 | * will be pro-rated among all views whose weight is greater than 0. |
| 1975 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 1976 | @ViewDebug.ExportedProperty(category = "layout") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1977 | public float weight; |
| 1978 | |
| 1979 | /** |
| 1980 | * Gravity for the view associated with these LayoutParams. |
| 1981 | * |
| 1982 | * @see android.view.Gravity |
| 1983 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 1984 | @ViewDebug.ExportedProperty(category = "layout", mapping = { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1985 | @ViewDebug.IntToString(from = -1, to = "NONE"), |
| 1986 | @ViewDebug.IntToString(from = Gravity.NO_GRAVITY, to = "NONE"), |
| 1987 | @ViewDebug.IntToString(from = Gravity.TOP, to = "TOP"), |
| 1988 | @ViewDebug.IntToString(from = Gravity.BOTTOM, to = "BOTTOM"), |
| 1989 | @ViewDebug.IntToString(from = Gravity.LEFT, to = "LEFT"), |
| 1990 | @ViewDebug.IntToString(from = Gravity.RIGHT, to = "RIGHT"), |
Chet Haase | 8b9ed44 | 2016-08-25 15:35:53 -0700 | [diff] [blame] | 1991 | @ViewDebug.IntToString(from = Gravity.START, to = "START"), |
| 1992 | @ViewDebug.IntToString(from = Gravity.END, to = "END"), |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1993 | @ViewDebug.IntToString(from = Gravity.CENTER_VERTICAL, to = "CENTER_VERTICAL"), |
| 1994 | @ViewDebug.IntToString(from = Gravity.FILL_VERTICAL, to = "FILL_VERTICAL"), |
| 1995 | @ViewDebug.IntToString(from = Gravity.CENTER_HORIZONTAL, to = "CENTER_HORIZONTAL"), |
| 1996 | @ViewDebug.IntToString(from = Gravity.FILL_HORIZONTAL, to = "FILL_HORIZONTAL"), |
| 1997 | @ViewDebug.IntToString(from = Gravity.CENTER, to = "CENTER"), |
| 1998 | @ViewDebug.IntToString(from = Gravity.FILL, to = "FILL") |
| 1999 | }) |
| 2000 | public int gravity = -1; |
| 2001 | |
| 2002 | /** |
| 2003 | * {@inheritDoc} |
| 2004 | */ |
| 2005 | public LayoutParams(Context c, AttributeSet attrs) { |
| 2006 | super(c, attrs); |
| 2007 | TypedArray a = |
| 2008 | c.obtainStyledAttributes(attrs, com.android.internal.R.styleable.LinearLayout_Layout); |
| 2009 | |
| 2010 | weight = a.getFloat(com.android.internal.R.styleable.LinearLayout_Layout_layout_weight, 0); |
| 2011 | gravity = a.getInt(com.android.internal.R.styleable.LinearLayout_Layout_layout_gravity, -1); |
| 2012 | |
| 2013 | a.recycle(); |
| 2014 | } |
| 2015 | |
| 2016 | /** |
| 2017 | * {@inheritDoc} |
| 2018 | */ |
| 2019 | public LayoutParams(int width, int height) { |
| 2020 | super(width, height); |
| 2021 | weight = 0; |
| 2022 | } |
| 2023 | |
| 2024 | /** |
| 2025 | * Creates a new set of layout parameters with the specified width, height |
| 2026 | * and weight. |
| 2027 | * |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 2028 | * @param width the width, either {@link #MATCH_PARENT}, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2029 | * {@link #WRAP_CONTENT} or a fixed size in pixels |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 2030 | * @param height the height, either {@link #MATCH_PARENT}, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2031 | * {@link #WRAP_CONTENT} or a fixed size in pixels |
| 2032 | * @param weight the weight |
| 2033 | */ |
| 2034 | public LayoutParams(int width, int height, float weight) { |
| 2035 | super(width, height); |
| 2036 | this.weight = weight; |
| 2037 | } |
| 2038 | |
| 2039 | /** |
| 2040 | * {@inheritDoc} |
| 2041 | */ |
| 2042 | public LayoutParams(ViewGroup.LayoutParams p) { |
| 2043 | super(p); |
| 2044 | } |
| 2045 | |
| 2046 | /** |
| 2047 | * {@inheritDoc} |
| 2048 | */ |
Alan Viverette | 0a0e155 | 2013-08-07 13:24:09 -0700 | [diff] [blame] | 2049 | public LayoutParams(ViewGroup.MarginLayoutParams source) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2050 | super(source); |
| 2051 | } |
| 2052 | |
Alan Viverette | 0a0e155 | 2013-08-07 13:24:09 -0700 | [diff] [blame] | 2053 | /** |
| 2054 | * Copy constructor. Clones the width, height, margin values, weight, |
| 2055 | * and gravity of the source. |
| 2056 | * |
| 2057 | * @param source The layout params to copy from. |
| 2058 | */ |
| 2059 | public LayoutParams(LayoutParams source) { |
| 2060 | super(source); |
| 2061 | |
| 2062 | this.weight = source.weight; |
| 2063 | this.gravity = source.gravity; |
| 2064 | } |
| 2065 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2066 | @Override |
| 2067 | public String debug(String output) { |
| 2068 | return output + "LinearLayout.LayoutParams={width=" + sizeToString(width) + |
| 2069 | ", height=" + sizeToString(height) + " weight=" + weight + "}"; |
| 2070 | } |
Siva Velusamy | 94a6d15 | 2015-05-05 15:07:00 -0700 | [diff] [blame] | 2071 | |
| 2072 | /** @hide */ |
| 2073 | @Override |
Mathew Inwood | a85f4eb | 2018-08-21 16:08:34 +0100 | [diff] [blame] | 2074 | @UnsupportedAppUsage |
Siva Velusamy | 94a6d15 | 2015-05-05 15:07:00 -0700 | [diff] [blame] | 2075 | protected void encodeProperties(@NonNull ViewHierarchyEncoder encoder) { |
| 2076 | super.encodeProperties(encoder); |
| 2077 | |
| 2078 | encoder.addProperty("layout:weight", weight); |
| 2079 | encoder.addProperty("layout:gravity", gravity); |
| 2080 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2081 | } |
| 2082 | } |