Adam Powell | be0a453 | 2010-11-29 17:47:48 -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.preference; |
| 18 | |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 19 | import android.content.Context; |
| 20 | import android.content.SharedPreferences; |
| 21 | import android.content.res.TypedArray; |
| 22 | import android.os.Parcel; |
| 23 | import android.os.Parcelable; |
Amith Yamasani | b251588 | 2013-09-09 14:46:07 -0700 | [diff] [blame] | 24 | import android.text.TextUtils; |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 25 | import android.util.AttributeSet; |
| 26 | import android.view.View; |
| 27 | import android.view.accessibility.AccessibilityEvent; |
| 28 | import android.view.accessibility.AccessibilityManager; |
| 29 | import android.widget.TextView; |
| 30 | |
| 31 | /** |
| 32 | * Common base class for preferences that have two selectable states, persist a |
| 33 | * boolean value in SharedPreferences, and may have dependent preferences that are |
| 34 | * enabled/disabled based on the current state. |
| 35 | */ |
| 36 | public abstract class TwoStatePreference extends Preference { |
| 37 | |
| 38 | private CharSequence mSummaryOn; |
| 39 | private CharSequence mSummaryOff; |
| 40 | boolean mChecked; |
Adam Powell | c1b0721 | 2012-08-10 14:20:14 -0700 | [diff] [blame] | 41 | private boolean mCheckedSet; |
Svetoslav Ganov | 7650259 | 2011-07-29 10:44:59 -0700 | [diff] [blame] | 42 | private boolean mSendClickAccessibilityEvent; |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 43 | private boolean mDisableDependentsState; |
| 44 | |
Svetoslav Ganov | 5c3ea06 | 2011-07-22 18:52:56 -0700 | [diff] [blame] | 45 | |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 46 | public TwoStatePreference(Context context, AttributeSet attrs, int defStyle) { |
| 47 | super(context, attrs, defStyle); |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 48 | } |
| 49 | |
| 50 | public TwoStatePreference(Context context, AttributeSet attrs) { |
Svetoslav Ganov | 5c3ea06 | 2011-07-22 18:52:56 -0700 | [diff] [blame] | 51 | this(context, attrs, 0); |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | public TwoStatePreference(Context context) { |
Svetoslav Ganov | 5c3ea06 | 2011-07-22 18:52:56 -0700 | [diff] [blame] | 55 | this(context, null); |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 56 | } |
| 57 | |
| 58 | @Override |
| 59 | protected void onClick() { |
| 60 | super.onClick(); |
| 61 | |
| 62 | boolean newValue = !isChecked(); |
| 63 | |
Svetoslav Ganov | 7650259 | 2011-07-29 10:44:59 -0700 | [diff] [blame] | 64 | mSendClickAccessibilityEvent = true; |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 65 | |
| 66 | if (!callChangeListener(newValue)) { |
| 67 | return; |
| 68 | } |
| 69 | |
| 70 | setChecked(newValue); |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Sets the checked state and saves it to the {@link SharedPreferences}. |
| 75 | * |
| 76 | * @param checked The checked state. |
| 77 | */ |
| 78 | public void setChecked(boolean checked) { |
Adam Powell | c1b0721 | 2012-08-10 14:20:14 -0700 | [diff] [blame] | 79 | // Always persist/notify the first time; don't assume the field's default of false. |
| 80 | final boolean changed = mChecked != checked; |
| 81 | if (changed || !mCheckedSet) { |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 82 | mChecked = checked; |
Adam Powell | c1b0721 | 2012-08-10 14:20:14 -0700 | [diff] [blame] | 83 | mCheckedSet = true; |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 84 | persistBoolean(checked); |
Adam Powell | c1b0721 | 2012-08-10 14:20:14 -0700 | [diff] [blame] | 85 | if (changed) { |
| 86 | notifyDependencyChange(shouldDisableDependents()); |
| 87 | notifyChanged(); |
| 88 | } |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 89 | } |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Returns the checked state. |
| 94 | * |
| 95 | * @return The checked state. |
| 96 | */ |
| 97 | public boolean isChecked() { |
| 98 | return mChecked; |
| 99 | } |
| 100 | |
| 101 | @Override |
| 102 | public boolean shouldDisableDependents() { |
| 103 | boolean shouldDisable = mDisableDependentsState ? mChecked : !mChecked; |
| 104 | return shouldDisable || super.shouldDisableDependents(); |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * Sets the summary to be shown when checked. |
| 109 | * |
| 110 | * @param summary The summary to be shown when checked. |
| 111 | */ |
| 112 | public void setSummaryOn(CharSequence summary) { |
| 113 | mSummaryOn = summary; |
| 114 | if (isChecked()) { |
| 115 | notifyChanged(); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * @see #setSummaryOn(CharSequence) |
| 121 | * @param summaryResId The summary as a resource. |
| 122 | */ |
| 123 | public void setSummaryOn(int summaryResId) { |
| 124 | setSummaryOn(getContext().getString(summaryResId)); |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Returns the summary to be shown when checked. |
| 129 | * @return The summary. |
| 130 | */ |
| 131 | public CharSequence getSummaryOn() { |
| 132 | return mSummaryOn; |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * Sets the summary to be shown when unchecked. |
| 137 | * |
| 138 | * @param summary The summary to be shown when unchecked. |
| 139 | */ |
| 140 | public void setSummaryOff(CharSequence summary) { |
| 141 | mSummaryOff = summary; |
| 142 | if (!isChecked()) { |
| 143 | notifyChanged(); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * @see #setSummaryOff(CharSequence) |
| 149 | * @param summaryResId The summary as a resource. |
| 150 | */ |
| 151 | public void setSummaryOff(int summaryResId) { |
| 152 | setSummaryOff(getContext().getString(summaryResId)); |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * Returns the summary to be shown when unchecked. |
| 157 | * @return The summary. |
| 158 | */ |
| 159 | public CharSequence getSummaryOff() { |
| 160 | return mSummaryOff; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Returns whether dependents are disabled when this preference is on ({@code true}) |
| 165 | * or when this preference is off ({@code false}). |
| 166 | * |
| 167 | * @return Whether dependents are disabled when this preference is on ({@code true}) |
| 168 | * or when this preference is off ({@code false}). |
| 169 | */ |
| 170 | public boolean getDisableDependentsState() { |
| 171 | return mDisableDependentsState; |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Sets whether dependents are disabled when this preference is on ({@code true}) |
| 176 | * or when this preference is off ({@code false}). |
| 177 | * |
| 178 | * @param disableDependentsState The preference state that should disable dependents. |
| 179 | */ |
| 180 | public void setDisableDependentsState(boolean disableDependentsState) { |
| 181 | mDisableDependentsState = disableDependentsState; |
| 182 | } |
| 183 | |
| 184 | @Override |
| 185 | protected Object onGetDefaultValue(TypedArray a, int index) { |
| 186 | return a.getBoolean(index, false); |
| 187 | } |
| 188 | |
| 189 | @Override |
| 190 | protected void onSetInitialValue(boolean restoreValue, Object defaultValue) { |
| 191 | setChecked(restoreValue ? getPersistedBoolean(mChecked) |
| 192 | : (Boolean) defaultValue); |
| 193 | } |
| 194 | |
Svetoslav Ganov | 7650259 | 2011-07-29 10:44:59 -0700 | [diff] [blame] | 195 | void sendAccessibilityEvent(View view) { |
| 196 | // Since the view is still not attached we create, populate, |
| 197 | // and send the event directly since we do not know when it |
| 198 | // will be attached and posting commands is not as clean. |
| 199 | AccessibilityManager accessibilityManager = AccessibilityManager.getInstance(getContext()); |
| 200 | if (mSendClickAccessibilityEvent && accessibilityManager.isEnabled()) { |
| 201 | AccessibilityEvent event = AccessibilityEvent.obtain(); |
| 202 | event.setEventType(AccessibilityEvent.TYPE_VIEW_CLICKED); |
| 203 | view.onInitializeAccessibilityEvent(event); |
| 204 | view.dispatchPopulateAccessibilityEvent(event); |
| 205 | accessibilityManager.sendAccessibilityEvent(event); |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 206 | } |
Svetoslav Ganov | 7650259 | 2011-07-29 10:44:59 -0700 | [diff] [blame] | 207 | mSendClickAccessibilityEvent = false; |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | /** |
| 211 | * Sync a summary view contained within view's subhierarchy with the correct summary text. |
| 212 | * @param view View where a summary should be located |
| 213 | */ |
| 214 | void syncSummaryView(View view) { |
| 215 | // Sync the summary view |
| 216 | TextView summaryView = (TextView) view.findViewById(com.android.internal.R.id.summary); |
| 217 | if (summaryView != null) { |
| 218 | boolean useDefaultSummary = true; |
Amith Yamasani | b251588 | 2013-09-09 14:46:07 -0700 | [diff] [blame] | 219 | if (mChecked && !TextUtils.isEmpty(mSummaryOn)) { |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 220 | summaryView.setText(mSummaryOn); |
| 221 | useDefaultSummary = false; |
Amith Yamasani | b251588 | 2013-09-09 14:46:07 -0700 | [diff] [blame] | 222 | } else if (!mChecked && !TextUtils.isEmpty(mSummaryOff)) { |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 223 | summaryView.setText(mSummaryOff); |
| 224 | useDefaultSummary = false; |
| 225 | } |
| 226 | |
| 227 | if (useDefaultSummary) { |
| 228 | final CharSequence summary = getSummary(); |
Amith Yamasani | b251588 | 2013-09-09 14:46:07 -0700 | [diff] [blame] | 229 | if (!TextUtils.isEmpty(summary)) { |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 230 | summaryView.setText(summary); |
| 231 | useDefaultSummary = false; |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | int newVisibility = View.GONE; |
| 236 | if (!useDefaultSummary) { |
| 237 | // Someone has written to it |
| 238 | newVisibility = View.VISIBLE; |
| 239 | } |
| 240 | if (newVisibility != summaryView.getVisibility()) { |
| 241 | summaryView.setVisibility(newVisibility); |
| 242 | } |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | @Override |
| 247 | protected Parcelable onSaveInstanceState() { |
| 248 | final Parcelable superState = super.onSaveInstanceState(); |
| 249 | if (isPersistent()) { |
| 250 | // No need to save instance state since it's persistent |
| 251 | return superState; |
| 252 | } |
| 253 | |
| 254 | final SavedState myState = new SavedState(superState); |
| 255 | myState.checked = isChecked(); |
| 256 | return myState; |
| 257 | } |
| 258 | |
| 259 | @Override |
| 260 | protected void onRestoreInstanceState(Parcelable state) { |
| 261 | if (state == null || !state.getClass().equals(SavedState.class)) { |
| 262 | // Didn't save state for us in onSaveInstanceState |
| 263 | super.onRestoreInstanceState(state); |
| 264 | return; |
| 265 | } |
| 266 | |
| 267 | SavedState myState = (SavedState) state; |
| 268 | super.onRestoreInstanceState(myState.getSuperState()); |
| 269 | setChecked(myState.checked); |
| 270 | } |
| 271 | |
| 272 | static class SavedState extends BaseSavedState { |
| 273 | boolean checked; |
| 274 | |
| 275 | public SavedState(Parcel source) { |
| 276 | super(source); |
| 277 | checked = source.readInt() == 1; |
| 278 | } |
| 279 | |
| 280 | @Override |
| 281 | public void writeToParcel(Parcel dest, int flags) { |
| 282 | super.writeToParcel(dest, flags); |
| 283 | dest.writeInt(checked ? 1 : 0); |
| 284 | } |
| 285 | |
| 286 | public SavedState(Parcelable superState) { |
| 287 | super(superState); |
| 288 | } |
| 289 | |
| 290 | public static final Parcelable.Creator<SavedState> CREATOR = |
| 291 | new Parcelable.Creator<SavedState>() { |
| 292 | public SavedState createFromParcel(Parcel in) { |
| 293 | return new SavedState(in); |
| 294 | } |
| 295 | |
| 296 | public SavedState[] newArray(int size) { |
| 297 | return new SavedState[size]; |
| 298 | } |
| 299 | }; |
| 300 | } |
Adam Powell | be0a453 | 2010-11-29 17:47:48 -0800 | [diff] [blame] | 301 | } |