Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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 | |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 19 | import android.content.Context; |
| 20 | import android.content.res.ColorStateList; |
| 21 | import android.content.res.Resources; |
| 22 | import android.content.res.TypedArray; |
| 23 | import android.graphics.Canvas; |
| 24 | import android.graphics.Paint; |
| 25 | import android.graphics.Rect; |
| 26 | import android.graphics.Typeface; |
| 27 | import android.graphics.drawable.Drawable; |
| 28 | import android.text.Layout; |
| 29 | import android.text.StaticLayout; |
| 30 | import android.text.TextPaint; |
| 31 | import android.text.TextUtils; |
| 32 | import android.util.AttributeSet; |
| 33 | import android.view.Gravity; |
| 34 | import android.view.MotionEvent; |
| 35 | import android.view.VelocityTracker; |
| 36 | import android.view.ViewConfiguration; |
Svetoslav Ganov | 63bce03 | 2011-07-23 19:52:17 -0700 | [diff] [blame] | 37 | import android.view.accessibility.AccessibilityEvent; |
Svetoslav Ganov | 8a78fd4 | 2012-01-17 14:36:46 -0800 | [diff] [blame^] | 38 | import android.view.accessibility.AccessibilityNodeInfo; |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 39 | |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 40 | import com.android.internal.R; |
| 41 | |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 42 | /** |
| 43 | * A Switch is a two-state toggle switch widget that can select between two |
| 44 | * options. The user may drag the "thumb" back and forth to choose the selected option, |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 45 | * or simply tap to toggle as if it were a checkbox. The {@link #setText(CharSequence) text} |
| 46 | * property controls the text displayed in the label for the switch, whereas the |
| 47 | * {@link #setTextOff(CharSequence) off} and {@link #setTextOn(CharSequence) on} text |
| 48 | * controls the text on the thumb. Similarly, the |
| 49 | * {@link #setTextAppearance(android.content.Context, int) textAppearance} and the related |
| 50 | * setTypeface() methods control the typeface and style of label text, whereas the |
| 51 | * {@link #setSwitchTextAppearance(android.content.Context, int) switchTextAppearance} and |
| 52 | * the related seSwitchTypeface() methods control that of the thumb. |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 53 | * |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 54 | */ |
| 55 | public class Switch extends CompoundButton { |
| 56 | private static final int TOUCH_MODE_IDLE = 0; |
| 57 | private static final int TOUCH_MODE_DOWN = 1; |
| 58 | private static final int TOUCH_MODE_DRAGGING = 2; |
| 59 | |
| 60 | // Enum for the "typeface" XML parameter. |
| 61 | private static final int SANS = 1; |
| 62 | private static final int SERIF = 2; |
| 63 | private static final int MONOSPACE = 3; |
| 64 | |
| 65 | private Drawable mThumbDrawable; |
| 66 | private Drawable mTrackDrawable; |
| 67 | private int mThumbTextPadding; |
| 68 | private int mSwitchMinWidth; |
| 69 | private int mSwitchPadding; |
| 70 | private CharSequence mTextOn; |
| 71 | private CharSequence mTextOff; |
| 72 | |
| 73 | private int mTouchMode; |
| 74 | private int mTouchSlop; |
| 75 | private float mTouchX; |
| 76 | private float mTouchY; |
| 77 | private VelocityTracker mVelocityTracker = VelocityTracker.obtain(); |
| 78 | private int mMinFlingVelocity; |
| 79 | |
| 80 | private float mThumbPosition; |
| 81 | private int mSwitchWidth; |
| 82 | private int mSwitchHeight; |
| 83 | private int mThumbWidth; // Does not include padding |
| 84 | |
| 85 | private int mSwitchLeft; |
| 86 | private int mSwitchTop; |
| 87 | private int mSwitchRight; |
| 88 | private int mSwitchBottom; |
| 89 | |
| 90 | private TextPaint mTextPaint; |
| 91 | private ColorStateList mTextColors; |
| 92 | private Layout mOnLayout; |
| 93 | private Layout mOffLayout; |
| 94 | |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 95 | @SuppressWarnings("hiding") |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 96 | private final Rect mTempRect = new Rect(); |
| 97 | |
| 98 | private static final int[] CHECKED_STATE_SET = { |
| 99 | R.attr.state_checked |
| 100 | }; |
| 101 | |
| 102 | /** |
| 103 | * Construct a new Switch with default styling. |
| 104 | * |
| 105 | * @param context The Context that will determine this widget's theming. |
| 106 | */ |
| 107 | public Switch(Context context) { |
| 108 | this(context, null); |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Construct a new Switch with default styling, overriding specific style |
| 113 | * attributes as requested. |
| 114 | * |
| 115 | * @param context The Context that will determine this widget's theming. |
| 116 | * @param attrs Specification of attributes that should deviate from default styling. |
| 117 | */ |
| 118 | public Switch(Context context, AttributeSet attrs) { |
| 119 | this(context, attrs, com.android.internal.R.attr.switchStyle); |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Construct a new Switch with a default style determined by the given theme attribute, |
| 124 | * overriding specific style attributes as requested. |
| 125 | * |
| 126 | * @param context The Context that will determine this widget's theming. |
| 127 | * @param attrs Specification of attributes that should deviate from the default styling. |
| 128 | * @param defStyle An attribute ID within the active theme containing a reference to the |
| 129 | * default style for this widget. e.g. android.R.attr.switchStyle. |
| 130 | */ |
| 131 | public Switch(Context context, AttributeSet attrs, int defStyle) { |
| 132 | super(context, attrs, defStyle); |
| 133 | |
| 134 | mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG); |
| 135 | Resources res = getResources(); |
| 136 | mTextPaint.density = res.getDisplayMetrics().density; |
| 137 | mTextPaint.setCompatibilityScaling(res.getCompatibilityInfo().applicationScale); |
| 138 | |
| 139 | TypedArray a = context.obtainStyledAttributes(attrs, |
| 140 | com.android.internal.R.styleable.Switch, defStyle, 0); |
| 141 | |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 142 | mThumbDrawable = a.getDrawable(com.android.internal.R.styleable.Switch_thumb); |
| 143 | mTrackDrawable = a.getDrawable(com.android.internal.R.styleable.Switch_track); |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 144 | mTextOn = a.getText(com.android.internal.R.styleable.Switch_textOn); |
| 145 | mTextOff = a.getText(com.android.internal.R.styleable.Switch_textOff); |
| 146 | mThumbTextPadding = a.getDimensionPixelSize( |
| 147 | com.android.internal.R.styleable.Switch_thumbTextPadding, 0); |
| 148 | mSwitchMinWidth = a.getDimensionPixelSize( |
| 149 | com.android.internal.R.styleable.Switch_switchMinWidth, 0); |
| 150 | mSwitchPadding = a.getDimensionPixelSize( |
| 151 | com.android.internal.R.styleable.Switch_switchPadding, 0); |
| 152 | |
| 153 | int appearance = a.getResourceId( |
| 154 | com.android.internal.R.styleable.Switch_switchTextAppearance, 0); |
| 155 | if (appearance != 0) { |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 156 | setSwitchTextAppearance(context, appearance); |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 157 | } |
| 158 | a.recycle(); |
| 159 | |
| 160 | ViewConfiguration config = ViewConfiguration.get(context); |
| 161 | mTouchSlop = config.getScaledTouchSlop(); |
| 162 | mMinFlingVelocity = config.getScaledMinimumFlingVelocity(); |
| 163 | |
| 164 | // Refresh display with current params |
Gilles Debunne | e724ee4 | 2011-08-31 11:20:27 -0700 | [diff] [blame] | 165 | refreshDrawableState(); |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 166 | setChecked(isChecked()); |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Sets the switch text color, size, style, hint color, and highlight color |
| 171 | * from the specified TextAppearance resource. |
| 172 | */ |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 173 | public void setSwitchTextAppearance(Context context, int resid) { |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 174 | TypedArray appearance = |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 175 | context.obtainStyledAttributes(resid, |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 176 | com.android.internal.R.styleable.TextAppearance); |
| 177 | |
| 178 | ColorStateList colors; |
| 179 | int ts; |
| 180 | |
| 181 | colors = appearance.getColorStateList(com.android.internal.R.styleable. |
| 182 | TextAppearance_textColor); |
| 183 | if (colors != null) { |
| 184 | mTextColors = colors; |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 185 | } else { |
| 186 | // If no color set in TextAppearance, default to the view's textColor |
| 187 | mTextColors = getTextColors(); |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable. |
| 191 | TextAppearance_textSize, 0); |
| 192 | if (ts != 0) { |
| 193 | if (ts != mTextPaint.getTextSize()) { |
| 194 | mTextPaint.setTextSize(ts); |
| 195 | requestLayout(); |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | int typefaceIndex, styleIndex; |
| 200 | |
| 201 | typefaceIndex = appearance.getInt(com.android.internal.R.styleable. |
| 202 | TextAppearance_typeface, -1); |
| 203 | styleIndex = appearance.getInt(com.android.internal.R.styleable. |
| 204 | TextAppearance_textStyle, -1); |
| 205 | |
| 206 | setSwitchTypefaceByIndex(typefaceIndex, styleIndex); |
| 207 | |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 208 | appearance.recycle(); |
| 209 | } |
| 210 | |
| 211 | private void setSwitchTypefaceByIndex(int typefaceIndex, int styleIndex) { |
| 212 | Typeface tf = null; |
| 213 | switch (typefaceIndex) { |
| 214 | case SANS: |
| 215 | tf = Typeface.SANS_SERIF; |
| 216 | break; |
| 217 | |
| 218 | case SERIF: |
| 219 | tf = Typeface.SERIF; |
| 220 | break; |
| 221 | |
| 222 | case MONOSPACE: |
| 223 | tf = Typeface.MONOSPACE; |
| 224 | break; |
| 225 | } |
| 226 | |
| 227 | setSwitchTypeface(tf, styleIndex); |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Sets the typeface and style in which the text should be displayed on the |
| 232 | * switch, and turns on the fake bold and italic bits in the Paint if the |
| 233 | * Typeface that you provided does not have all the bits in the |
| 234 | * style that you specified. |
| 235 | */ |
| 236 | public void setSwitchTypeface(Typeface tf, int style) { |
| 237 | if (style > 0) { |
| 238 | if (tf == null) { |
| 239 | tf = Typeface.defaultFromStyle(style); |
| 240 | } else { |
| 241 | tf = Typeface.create(tf, style); |
| 242 | } |
| 243 | |
| 244 | setSwitchTypeface(tf); |
| 245 | // now compute what (if any) algorithmic styling is needed |
| 246 | int typefaceStyle = tf != null ? tf.getStyle() : 0; |
| 247 | int need = style & ~typefaceStyle; |
| 248 | mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0); |
| 249 | mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0); |
| 250 | } else { |
| 251 | mTextPaint.setFakeBoldText(false); |
| 252 | mTextPaint.setTextSkewX(0); |
| 253 | setSwitchTypeface(tf); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | /** |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 258 | * Sets the typeface in which the text should be displayed on the switch. |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 259 | * Note that not all Typeface families actually have bold and italic |
| 260 | * variants, so you may need to use |
| 261 | * {@link #setSwitchTypeface(Typeface, int)} to get the appearance |
| 262 | * that you actually want. |
| 263 | * |
| 264 | * @attr ref android.R.styleable#TextView_typeface |
| 265 | * @attr ref android.R.styleable#TextView_textStyle |
| 266 | */ |
| 267 | public void setSwitchTypeface(Typeface tf) { |
| 268 | if (mTextPaint.getTypeface() != tf) { |
| 269 | mTextPaint.setTypeface(tf); |
| 270 | |
| 271 | requestLayout(); |
| 272 | invalidate(); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | /** |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 277 | * Returns the text displayed when the button is in the checked state. |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 278 | */ |
| 279 | public CharSequence getTextOn() { |
| 280 | return mTextOn; |
| 281 | } |
| 282 | |
| 283 | /** |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 284 | * Sets the text displayed when the button is in the checked state. |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 285 | */ |
| 286 | public void setTextOn(CharSequence textOn) { |
| 287 | mTextOn = textOn; |
| 288 | requestLayout(); |
| 289 | } |
| 290 | |
| 291 | /** |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 292 | * Returns the text displayed when the button is not in the checked state. |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 293 | */ |
| 294 | public CharSequence getTextOff() { |
| 295 | return mTextOff; |
| 296 | } |
| 297 | |
| 298 | /** |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 299 | * Sets the text displayed when the button is not in the checked state. |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 300 | */ |
| 301 | public void setTextOff(CharSequence textOff) { |
| 302 | mTextOff = textOff; |
| 303 | requestLayout(); |
| 304 | } |
| 305 | |
| 306 | @Override |
| 307 | public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| 308 | final int widthMode = MeasureSpec.getMode(widthMeasureSpec); |
| 309 | final int heightMode = MeasureSpec.getMode(heightMeasureSpec); |
| 310 | int widthSize = MeasureSpec.getSize(widthMeasureSpec); |
| 311 | int heightSize = MeasureSpec.getSize(heightMeasureSpec); |
| 312 | |
| 313 | |
| 314 | if (mOnLayout == null) { |
| 315 | mOnLayout = makeLayout(mTextOn); |
| 316 | } |
| 317 | if (mOffLayout == null) { |
| 318 | mOffLayout = makeLayout(mTextOff); |
| 319 | } |
| 320 | |
| 321 | mTrackDrawable.getPadding(mTempRect); |
| 322 | final int maxTextWidth = Math.max(mOnLayout.getWidth(), mOffLayout.getWidth()); |
| 323 | final int switchWidth = Math.max(mSwitchMinWidth, |
| 324 | maxTextWidth * 2 + mThumbTextPadding * 4 + mTempRect.left + mTempRect.right); |
| 325 | final int switchHeight = mTrackDrawable.getIntrinsicHeight(); |
| 326 | |
| 327 | mThumbWidth = maxTextWidth + mThumbTextPadding * 2; |
| 328 | |
| 329 | switch (widthMode) { |
| 330 | case MeasureSpec.AT_MOST: |
| 331 | widthSize = Math.min(widthSize, switchWidth); |
| 332 | break; |
| 333 | |
| 334 | case MeasureSpec.UNSPECIFIED: |
| 335 | widthSize = switchWidth; |
| 336 | break; |
| 337 | |
| 338 | case MeasureSpec.EXACTLY: |
| 339 | // Just use what we were given |
| 340 | break; |
| 341 | } |
| 342 | |
| 343 | switch (heightMode) { |
| 344 | case MeasureSpec.AT_MOST: |
| 345 | heightSize = Math.min(heightSize, switchHeight); |
| 346 | break; |
| 347 | |
| 348 | case MeasureSpec.UNSPECIFIED: |
| 349 | heightSize = switchHeight; |
| 350 | break; |
| 351 | |
| 352 | case MeasureSpec.EXACTLY: |
| 353 | // Just use what we were given |
| 354 | break; |
| 355 | } |
| 356 | |
| 357 | mSwitchWidth = switchWidth; |
| 358 | mSwitchHeight = switchHeight; |
| 359 | |
| 360 | super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 361 | final int measuredHeight = getMeasuredHeight(); |
| 362 | if (measuredHeight < switchHeight) { |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 363 | setMeasuredDimension(getMeasuredWidthAndState(), switchHeight); |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 364 | } |
| 365 | } |
| 366 | |
Svetoslav Ganov | 63bce03 | 2011-07-23 19:52:17 -0700 | [diff] [blame] | 367 | @Override |
| 368 | public void onPopulateAccessibilityEvent(AccessibilityEvent event) { |
| 369 | super.onPopulateAccessibilityEvent(event); |
Svetoslav Ganov | 7650259 | 2011-07-29 10:44:59 -0700 | [diff] [blame] | 370 | if (isChecked()) { |
| 371 | CharSequence text = mOnLayout.getText(); |
| 372 | if (TextUtils.isEmpty(text)) { |
| 373 | text = mContext.getString(R.string.switch_on); |
| 374 | } |
| 375 | event.getText().add(text); |
| 376 | } else { |
| 377 | CharSequence text = mOffLayout.getText(); |
| 378 | if (TextUtils.isEmpty(text)) { |
| 379 | text = mContext.getString(R.string.switch_off); |
| 380 | } |
| 381 | event.getText().add(text); |
| 382 | } |
Svetoslav Ganov | 63bce03 | 2011-07-23 19:52:17 -0700 | [diff] [blame] | 383 | } |
| 384 | |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 385 | private Layout makeLayout(CharSequence text) { |
| 386 | return new StaticLayout(text, mTextPaint, |
| 387 | (int) Math.ceil(Layout.getDesiredWidth(text, mTextPaint)), |
| 388 | Layout.Alignment.ALIGN_NORMAL, 1.f, 0, true); |
| 389 | } |
| 390 | |
| 391 | /** |
| 392 | * @return true if (x, y) is within the target area of the switch thumb |
| 393 | */ |
| 394 | private boolean hitThumb(float x, float y) { |
| 395 | mThumbDrawable.getPadding(mTempRect); |
| 396 | final int thumbTop = mSwitchTop - mTouchSlop; |
| 397 | final int thumbLeft = mSwitchLeft + (int) (mThumbPosition + 0.5f) - mTouchSlop; |
| 398 | final int thumbRight = thumbLeft + mThumbWidth + |
| 399 | mTempRect.left + mTempRect.right + mTouchSlop; |
| 400 | final int thumbBottom = mSwitchBottom + mTouchSlop; |
| 401 | return x > thumbLeft && x < thumbRight && y > thumbTop && y < thumbBottom; |
| 402 | } |
| 403 | |
| 404 | @Override |
| 405 | public boolean onTouchEvent(MotionEvent ev) { |
| 406 | mVelocityTracker.addMovement(ev); |
| 407 | final int action = ev.getActionMasked(); |
| 408 | switch (action) { |
| 409 | case MotionEvent.ACTION_DOWN: { |
| 410 | final float x = ev.getX(); |
| 411 | final float y = ev.getY(); |
Gilles Debunne | c2ab0d6 | 2011-06-13 12:52:48 -0700 | [diff] [blame] | 412 | if (isEnabled() && hitThumb(x, y)) { |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 413 | mTouchMode = TOUCH_MODE_DOWN; |
| 414 | mTouchX = x; |
| 415 | mTouchY = y; |
| 416 | } |
| 417 | break; |
| 418 | } |
| 419 | |
| 420 | case MotionEvent.ACTION_MOVE: { |
| 421 | switch (mTouchMode) { |
| 422 | case TOUCH_MODE_IDLE: |
| 423 | // Didn't target the thumb, treat normally. |
| 424 | break; |
| 425 | |
| 426 | case TOUCH_MODE_DOWN: { |
| 427 | final float x = ev.getX(); |
| 428 | final float y = ev.getY(); |
| 429 | if (Math.abs(x - mTouchX) > mTouchSlop || |
| 430 | Math.abs(y - mTouchY) > mTouchSlop) { |
| 431 | mTouchMode = TOUCH_MODE_DRAGGING; |
| 432 | getParent().requestDisallowInterceptTouchEvent(true); |
| 433 | mTouchX = x; |
| 434 | mTouchY = y; |
| 435 | return true; |
| 436 | } |
| 437 | break; |
| 438 | } |
| 439 | |
| 440 | case TOUCH_MODE_DRAGGING: { |
| 441 | final float x = ev.getX(); |
| 442 | final float dx = x - mTouchX; |
| 443 | float newPos = Math.max(0, |
| 444 | Math.min(mThumbPosition + dx, getThumbScrollRange())); |
| 445 | if (newPos != mThumbPosition) { |
| 446 | mThumbPosition = newPos; |
| 447 | mTouchX = x; |
| 448 | invalidate(); |
| 449 | } |
| 450 | return true; |
| 451 | } |
| 452 | } |
| 453 | break; |
| 454 | } |
| 455 | |
| 456 | case MotionEvent.ACTION_UP: |
| 457 | case MotionEvent.ACTION_CANCEL: { |
| 458 | if (mTouchMode == TOUCH_MODE_DRAGGING) { |
| 459 | stopDrag(ev); |
| 460 | return true; |
| 461 | } |
| 462 | mTouchMode = TOUCH_MODE_IDLE; |
| 463 | mVelocityTracker.clear(); |
| 464 | break; |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | return super.onTouchEvent(ev); |
| 469 | } |
| 470 | |
| 471 | private void cancelSuperTouch(MotionEvent ev) { |
| 472 | MotionEvent cancel = MotionEvent.obtain(ev); |
| 473 | cancel.setAction(MotionEvent.ACTION_CANCEL); |
| 474 | super.onTouchEvent(cancel); |
| 475 | cancel.recycle(); |
| 476 | } |
| 477 | |
| 478 | /** |
| 479 | * Called from onTouchEvent to end a drag operation. |
| 480 | * |
| 481 | * @param ev Event that triggered the end of drag mode - ACTION_UP or ACTION_CANCEL |
| 482 | */ |
| 483 | private void stopDrag(MotionEvent ev) { |
| 484 | mTouchMode = TOUCH_MODE_IDLE; |
Gilles Debunne | c2ab0d6 | 2011-06-13 12:52:48 -0700 | [diff] [blame] | 485 | // Up and not canceled, also checks the switch has not been disabled during the drag |
| 486 | boolean commitChange = ev.getAction() == MotionEvent.ACTION_UP && isEnabled(); |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 487 | |
| 488 | cancelSuperTouch(ev); |
| 489 | |
| 490 | if (commitChange) { |
| 491 | boolean newState; |
| 492 | mVelocityTracker.computeCurrentVelocity(1000); |
| 493 | float xvel = mVelocityTracker.getXVelocity(); |
| 494 | if (Math.abs(xvel) > mMinFlingVelocity) { |
Adam Powell | 01d11ed | 2011-08-09 16:32:12 -0700 | [diff] [blame] | 495 | newState = xvel > 0; |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 496 | } else { |
| 497 | newState = getTargetCheckedState(); |
| 498 | } |
| 499 | animateThumbToCheckedState(newState); |
| 500 | } else { |
| 501 | animateThumbToCheckedState(isChecked()); |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | private void animateThumbToCheckedState(boolean newCheckedState) { |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 506 | // TODO animate! |
Joe Onorato | c3eabb9 | 2011-01-07 15:58:44 -0800 | [diff] [blame] | 507 | //float targetPos = newCheckedState ? 0 : getThumbScrollRange(); |
| 508 | //mThumbPosition = targetPos; |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 509 | setChecked(newCheckedState); |
| 510 | } |
| 511 | |
| 512 | private boolean getTargetCheckedState() { |
Adam Powell | ec1d603 | 2011-08-07 18:03:39 -0700 | [diff] [blame] | 513 | return mThumbPosition >= getThumbScrollRange() / 2; |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | @Override |
| 517 | public void setChecked(boolean checked) { |
| 518 | super.setChecked(checked); |
Adam Powell | ec1d603 | 2011-08-07 18:03:39 -0700 | [diff] [blame] | 519 | mThumbPosition = checked ? getThumbScrollRange() : 0; |
Joe Onorato | c3eabb9 | 2011-01-07 15:58:44 -0800 | [diff] [blame] | 520 | invalidate(); |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | @Override |
| 524 | protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| 525 | super.onLayout(changed, left, top, right, bottom); |
| 526 | |
Adam Powell | ec1d603 | 2011-08-07 18:03:39 -0700 | [diff] [blame] | 527 | mThumbPosition = isChecked() ? getThumbScrollRange() : 0; |
Joe Onorato | c3eabb9 | 2011-01-07 15:58:44 -0800 | [diff] [blame] | 528 | |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 529 | int switchRight = getWidth() - getPaddingRight(); |
| 530 | int switchLeft = switchRight - mSwitchWidth; |
| 531 | int switchTop = 0; |
| 532 | int switchBottom = 0; |
| 533 | switch (getGravity() & Gravity.VERTICAL_GRAVITY_MASK) { |
| 534 | default: |
| 535 | case Gravity.TOP: |
| 536 | switchTop = getPaddingTop(); |
| 537 | switchBottom = switchTop + mSwitchHeight; |
| 538 | break; |
| 539 | |
| 540 | case Gravity.CENTER_VERTICAL: |
| 541 | switchTop = (getPaddingTop() + getHeight() - getPaddingBottom()) / 2 - |
| 542 | mSwitchHeight / 2; |
| 543 | switchBottom = switchTop + mSwitchHeight; |
| 544 | break; |
| 545 | |
| 546 | case Gravity.BOTTOM: |
| 547 | switchBottom = getHeight() - getPaddingBottom(); |
| 548 | switchTop = switchBottom - mSwitchHeight; |
| 549 | break; |
| 550 | } |
| 551 | |
| 552 | mSwitchLeft = switchLeft; |
| 553 | mSwitchTop = switchTop; |
| 554 | mSwitchBottom = switchBottom; |
| 555 | mSwitchRight = switchRight; |
| 556 | } |
| 557 | |
| 558 | @Override |
| 559 | protected void onDraw(Canvas canvas) { |
| 560 | super.onDraw(canvas); |
| 561 | |
| 562 | // Draw the switch |
| 563 | int switchLeft = mSwitchLeft; |
| 564 | int switchTop = mSwitchTop; |
| 565 | int switchRight = mSwitchRight; |
| 566 | int switchBottom = mSwitchBottom; |
| 567 | |
| 568 | mTrackDrawable.setBounds(switchLeft, switchTop, switchRight, switchBottom); |
| 569 | mTrackDrawable.draw(canvas); |
| 570 | |
| 571 | canvas.save(); |
| 572 | |
| 573 | mTrackDrawable.getPadding(mTempRect); |
| 574 | int switchInnerLeft = switchLeft + mTempRect.left; |
| 575 | int switchInnerTop = switchTop + mTempRect.top; |
| 576 | int switchInnerRight = switchRight - mTempRect.right; |
| 577 | int switchInnerBottom = switchBottom - mTempRect.bottom; |
| 578 | canvas.clipRect(switchInnerLeft, switchTop, switchInnerRight, switchBottom); |
| 579 | |
| 580 | mThumbDrawable.getPadding(mTempRect); |
| 581 | final int thumbPos = (int) (mThumbPosition + 0.5f); |
| 582 | int thumbLeft = switchInnerLeft - mTempRect.left + thumbPos; |
| 583 | int thumbRight = switchInnerLeft + thumbPos + mThumbWidth + mTempRect.right; |
| 584 | |
| 585 | mThumbDrawable.setBounds(thumbLeft, switchTop, thumbRight, switchBottom); |
| 586 | mThumbDrawable.draw(canvas); |
| 587 | |
Chet Haase | 150176d | 2011-08-26 09:54:06 -0700 | [diff] [blame] | 588 | // mTextColors should not be null, but just in case |
| 589 | if (mTextColors != null) { |
| 590 | mTextPaint.setColor(mTextColors.getColorForState(getDrawableState(), |
| 591 | mTextColors.getDefaultColor())); |
| 592 | } |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 593 | mTextPaint.drawableState = getDrawableState(); |
| 594 | |
| 595 | Layout switchText = getTargetCheckedState() ? mOnLayout : mOffLayout; |
| 596 | |
| 597 | canvas.translate((thumbLeft + thumbRight) / 2 - switchText.getWidth() / 2, |
| 598 | (switchInnerTop + switchInnerBottom) / 2 - switchText.getHeight() / 2); |
| 599 | switchText.draw(canvas); |
| 600 | |
| 601 | canvas.restore(); |
| 602 | } |
| 603 | |
| 604 | @Override |
| 605 | public int getCompoundPaddingRight() { |
| 606 | int padding = super.getCompoundPaddingRight() + mSwitchWidth; |
| 607 | if (!TextUtils.isEmpty(getText())) { |
| 608 | padding += mSwitchPadding; |
| 609 | } |
| 610 | return padding; |
| 611 | } |
| 612 | |
| 613 | private int getThumbScrollRange() { |
| 614 | if (mTrackDrawable == null) { |
| 615 | return 0; |
| 616 | } |
| 617 | mTrackDrawable.getPadding(mTempRect); |
| 618 | return mSwitchWidth - mThumbWidth - mTempRect.left - mTempRect.right; |
| 619 | } |
| 620 | |
| 621 | @Override |
| 622 | protected int[] onCreateDrawableState(int extraSpace) { |
| 623 | final int[] drawableState = super.onCreateDrawableState(extraSpace + 1); |
| 624 | if (isChecked()) { |
| 625 | mergeDrawableStates(drawableState, CHECKED_STATE_SET); |
| 626 | } |
| 627 | return drawableState; |
| 628 | } |
| 629 | |
| 630 | @Override |
| 631 | protected void drawableStateChanged() { |
| 632 | super.drawableStateChanged(); |
| 633 | |
| 634 | int[] myDrawableState = getDrawableState(); |
| 635 | |
| 636 | // Set the state of the Drawable |
Gilles Debunne | e724ee4 | 2011-08-31 11:20:27 -0700 | [diff] [blame] | 637 | // Drawable may be null when checked state is set from XML, from super constructor |
| 638 | if (mThumbDrawable != null) mThumbDrawable.setState(myDrawableState); |
| 639 | if (mTrackDrawable != null) mTrackDrawable.setState(myDrawableState); |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 640 | |
| 641 | invalidate(); |
| 642 | } |
| 643 | |
| 644 | @Override |
| 645 | protected boolean verifyDrawable(Drawable who) { |
| 646 | return super.verifyDrawable(who) || who == mThumbDrawable || who == mTrackDrawable; |
| 647 | } |
| 648 | |
| 649 | @Override |
| 650 | public void jumpDrawablesToCurrentState() { |
| 651 | super.jumpDrawablesToCurrentState(); |
| 652 | mThumbDrawable.jumpToCurrentState(); |
| 653 | mTrackDrawable.jumpToCurrentState(); |
| 654 | } |
Svetoslav Ganov | 8a78fd4 | 2012-01-17 14:36:46 -0800 | [diff] [blame^] | 655 | |
| 656 | @Override |
| 657 | public void onInitializeAccessibilityEvent(AccessibilityEvent event) { |
| 658 | super.onInitializeAccessibilityEvent(event); |
| 659 | event.setClassName(Switch.class.getName()); |
| 660 | } |
| 661 | |
| 662 | @Override |
| 663 | public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { |
| 664 | super.onInitializeAccessibilityNodeInfo(info); |
| 665 | info.setClassName(Switch.class.getName()); |
| 666 | } |
Adam Powell | 12190b3 | 2010-11-28 19:07:53 -0800 | [diff] [blame] | 667 | } |