summaryrefslogtreecommitdiffstats
path: root/src/com/android/launcher2/AppsCustomizeTabHost.java
blob: 225b056280e2c297c82083c6a75f4ca640e00e91 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.launcher2;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.res.Resources;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.TabHost;
import android.widget.TabWidget;
import android.widget.TextView;

import com.android.launcher.R;

import java.util.ArrayList;

public class AppsCustomizeTabHost extends TabHost implements LauncherTransitionable,
        TabHost.OnTabChangeListener  {
    static final String LOG_TAG = "AppsCustomizeTabHost";

    private static final String APPS_TAB_TAG = "APPS";
    private static final String WIDGETS_TAB_TAG = "WIDGETS";

    private final LayoutInflater mLayoutInflater;
    private ViewGroup mTabs;
    private ViewGroup mTabsContainer;
    private AppsCustomizePagedView mAppsCustomizePane;
    private FrameLayout mAnimationBuffer;
    private LinearLayout mContent;

    private boolean mInTransition;
    private boolean mTransitioningToWorkspace;
    private boolean mResetAfterTransition;
    private Runnable mRelayoutAndMakeVisible;

    public AppsCustomizeTabHost(Context context, AttributeSet attrs) {
        super(context, attrs);
        mLayoutInflater = LayoutInflater.from(context);
        mRelayoutAndMakeVisible = new Runnable() {
                public void run() {
                    mTabs.requestLayout();
                    mTabsContainer.setAlpha(1f);
                }
            };
    }

    /**
     * Convenience methods to select specific tabs.  We want to set the content type immediately
     * in these cases, but we note that we still call setCurrentTabByTag() so that the tab view
     * reflects the new content (but doesn't do the animation and logic associated with changing
     * tabs manually).
     */
    void setContentTypeImmediate(AppsCustomizePagedView.ContentType type) {
        setOnTabChangedListener(null);
        onTabChangedStart();
        onTabChangedEnd(type);
        setCurrentTabByTag(getTabTagForContentType(type));
        setOnTabChangedListener(this);
    }
    void selectAppsTab() {
        setContentTypeImmediate(AppsCustomizePagedView.ContentType.Applications);
    }
    void selectWidgetsTab() {
        setContentTypeImmediate(AppsCustomizePagedView.ContentType.Widgets);
    }

    /**
     * Setup the tab host and create all necessary tabs.
     */
    @Override
    protected void onFinishInflate() {
        // Setup the tab host
        setup();

        final ViewGroup tabsContainer = (ViewGroup) findViewById(R.id.tabs_container);
        final TabWidget tabs = getTabWidget();
        final AppsCustomizePagedView appsCustomizePane = (AppsCustomizePagedView)
                findViewById(R.id.apps_customize_pane_content);
        mTabs = tabs;
        mTabsContainer = tabsContainer;
        mAppsCustomizePane = appsCustomizePane;
        mAnimationBuffer = (FrameLayout) findViewById(R.id.animation_buffer);
        mContent = (LinearLayout) findViewById(R.id.apps_customize_content);
        if (tabs == null || mAppsCustomizePane == null) throw new Resources.NotFoundException();

        // Configure the tabs content factory to return the same paged view (that we change the
        // content filter on)
        TabContentFactory contentFactory = new TabContentFactory() {
            public View createTabContent(String tag) {
                return appsCustomizePane;
            }
        };

        // Create the tabs
        TextView tabView;
        String label;
        label = getContext().getString(R.string.all_apps_button_label);
        tabView = (TextView) mLayoutInflater.inflate(R.layout.tab_widget_indicator, tabs, false);
        tabView.setText(label);
        tabView.setContentDescription(label);
        addTab(newTabSpec(APPS_TAB_TAG).setIndicator(tabView).setContent(contentFactory));
        label = getContext().getString(R.string.widgets_tab_label);
        tabView = (TextView) mLayoutInflater.inflate(R.layout.tab_widget_indicator, tabs, false);
        tabView.setText(label);
        tabView.setContentDescription(label);
        addTab(newTabSpec(WIDGETS_TAB_TAG).setIndicator(tabView).setContent(contentFactory));
        setOnTabChangedListener(this);

        // Setup the key listener to jump between the last tab view and the market icon
        AppsCustomizeTabKeyEventListener keyListener = new AppsCustomizeTabKeyEventListener();
        View lastTab = tabs.getChildTabViewAt(tabs.getTabCount() - 1);
        lastTab.setOnKeyListener(keyListener);
        View shopButton = findViewById(R.id.market_button);
        shopButton.setOnKeyListener(keyListener);

        // Hide the tab bar until we measure
        mTabsContainer.setAlpha(0f);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        boolean remeasureTabWidth = (mTabs.getLayoutParams().width <= 0);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        // Set the width of the tab list to the content width
        if (remeasureTabWidth) {
            int contentWidth = mAppsCustomizePane.getPageContentWidth();
            if (contentWidth > 0 && mTabs.getLayoutParams().width != contentWidth) {
                // Set the width and show the tab bar
                mTabs.getLayoutParams().width = contentWidth;
                mRelayoutAndMakeVisible.run();
            }

            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }

     public boolean onInterceptTouchEvent(MotionEvent ev) {
         // If we are mid transitioning to the workspace, then intercept touch events here so we
         // can ignore them, otherwise we just let all apps handle the touch events.
         if (mInTransition && mTransitioningToWorkspace) {
             return true;
         }
         return super.onInterceptTouchEvent(ev);
     };

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // Allow touch events to fall through to the workspace if we are transitioning there
        if (mInTransition && mTransitioningToWorkspace) {
            return super.onTouchEvent(event);
        }

        // Intercept all touch events up to the bottom of the AppsCustomizePane so they do not fall
        // through to the workspace and trigger showWorkspace()
        if (event.getY() < mAppsCustomizePane.getBottom()) {
            return true;
        }
        return super.onTouchEvent(event);
    }

    private void onTabChangedStart() {
        mAppsCustomizePane.hideScrollingIndicator(false);
    }

    private void reloadCurrentPage() {
        if (!LauncherApplication.isScreenLarge()) {
            mAppsCustomizePane.flashScrollingIndicator(true);
        }
        mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage());
        mAppsCustomizePane.requestFocus();
    }

    private void onTabChangedEnd(AppsCustomizePagedView.ContentType type) {
        mAppsCustomizePane.setContentType(type);
    }

    @Override
    public void onTabChanged(String tabId) {
        final AppsCustomizePagedView.ContentType type = getContentTypeForTabTag(tabId);

        // Animate the changing of the tab content by fading pages in and out
        final Resources res = getResources();
        final int duration = res.getInteger(R.integer.config_tabTransitionDuration);

        // We post a runnable here because there is a delay while the first page is loading and
        // the feedback from having changed the tab almost feels better than having it stick
        post(new Runnable() {
            @Override
            public void run() {
                if (mAppsCustomizePane.getMeasuredWidth() <= 0 ||
                        mAppsCustomizePane.getMeasuredHeight() <= 0) {
                    reloadCurrentPage();
                    return;
                }

                // Take the visible pages and re-parent them temporarily to mAnimatorBuffer
                // and then cross fade to the new pages
                int[] visiblePageRange = new int[2];
                mAppsCustomizePane.getVisiblePages(visiblePageRange);
                if (visiblePageRange[0] == -1 && visiblePageRange[1] == -1) {
                    // If we can't get the visible page ranges, then just skip the animation
                    reloadCurrentPage();
                    return;
                }
                ArrayList<View> visiblePages = new ArrayList<View>();
                for (int i = visiblePageRange[0]; i <= visiblePageRange[1]; i++) {
                    visiblePages.add(mAppsCustomizePane.getPageAt(i));
                }

                // We want the pages to be rendered in exactly the same way as they were when
                // their parent was mAppsCustomizePane -- so set the scroll on mAnimationBuffer
                // to be exactly the same as mAppsCustomizePane, and below, set the left/top
                // parameters to be correct for each of the pages
                mAnimationBuffer.scrollTo(mAppsCustomizePane.getScrollX(), 0);

                // mAppsCustomizePane renders its children in reverse order, so
                // add the pages to mAnimationBuffer in reverse order to match that behavior
                for (int i = visiblePages.size() - 1; i >= 0; i--) {
                    View child = visiblePages.get(i);
                    if (child instanceof PagedViewCellLayout) {
                        ((PagedViewCellLayout) child).resetChildrenOnKeyListeners();
                    } else if (child instanceof PagedViewGridLayout) {
                        ((PagedViewGridLayout) child).resetChildrenOnKeyListeners();
                    }
                    PagedViewWidget.setDeletePreviewsWhenDetachedFromWindow(false);
                    mAppsCustomizePane.removeView(child);
                    PagedViewWidget.setDeletePreviewsWhenDetachedFromWindow(true);
                    mAnimationBuffer.setAlpha(1f);
                    mAnimationBuffer.setVisibility(View.VISIBLE);
                    LayoutParams p = new FrameLayout.LayoutParams(child.getMeasuredWidth(),
                            child.getMeasuredHeight());
                    p.setMargins((int) child.getLeft(), (int) child.getTop(), 0, 0);
                    mAnimationBuffer.addView(child, p);
                }

                // Toggle the new content
                onTabChangedStart();
                onTabChangedEnd(type);

                // Animate the transition
                ObjectAnimator outAnim = LauncherAnimUtils.ofFloat(mAnimationBuffer, "alpha", 0f);
                outAnim.addListener(new AnimatorListenerAdapter() {
                    private void clearAnimationBuffer() {
                        mAnimationBuffer.setVisibility(View.GONE);
                        PagedViewWidget.setRecyclePreviewsWhenDetachedFromWindow(false);
                        mAnimationBuffer.removeAllViews();
                        PagedViewWidget.setRecyclePreviewsWhenDetachedFromWindow(true);
                    }
                    @Override
                    public void onAnimationEnd(Animator animation) {
                        clearAnimationBuffer();
                    }
                    @Override
                    public void onAnimationCancel(Animator animation) {
                        clearAnimationBuffer();
                    }
                });
                ObjectAnimator inAnim = LauncherAnimUtils.ofFloat(mAppsCustomizePane, "alpha", 1f);
                inAnim.addListener(new AnimatorListenerAdapter() {
                    @Override
                    public void onAnimationEnd(Animator animation) {
                        reloadCurrentPage();
                    }
                });

                final AnimatorSet animSet = LauncherAnimUtils.createAnimatorSet();
                animSet.playTogether(outAnim, inAnim);
                animSet.setDuration(duration);
                animSet.start();
            }
        });
    }

    public void setCurrentTabFromContent(AppsCustomizePagedView.ContentType type) {
        setOnTabChangedListener(null);
        setCurrentTabByTag(getTabTagForContentType(type));
        setOnTabChangedListener(this);
    }

    /**
     * Returns the content type for the specified tab tag.
     */
    public AppsCustomizePagedView.ContentType getContentTypeForTabTag(String tag) {
        if (tag.equals(APPS_TAB_TAG)) {
            return AppsCustomizePagedView.ContentType.Applications;
        } else if (tag.equals(WIDGETS_TAB_TAG)) {
            return AppsCustomizePagedView.ContentType.Widgets;
        }
        return AppsCustomizePagedView.ContentType.Applications;
    }

    /**
     * Returns the tab tag for a given content type.
     */
    public String getTabTagForContentType(AppsCustomizePagedView.ContentType type) {
        if (type == AppsCustomizePagedView.ContentType.Applications) {
            return APPS_TAB_TAG;
        } else if (type == AppsCustomizePagedView.ContentType.Widgets) {
            return WIDGETS_TAB_TAG;
        }
        return APPS_TAB_TAG;
    }

    /**
     * Disable focus on anything under this view in the hierarchy if we are not visible.
     */
    @Override
    public int getDescendantFocusability() {
        if (getVisibility() != View.VISIBLE) {
            return ViewGroup.FOCUS_BLOCK_DESCENDANTS;
        }
        return super.getDescendantFocusability();
    }

    void reset() {
        if (mInTransition) {
            // Defer to after the transition to reset
            mResetAfterTransition = true;
        } else {
            // Reset immediately
            mAppsCustomizePane.reset();
        }
    }

    private void enableAndBuildHardwareLayer() {
        // isHardwareAccelerated() checks if we're attached to a window and if that
        // window is HW accelerated-- we were sometimes not attached to a window
        // and buildLayer was throwing an IllegalStateException
        if (isHardwareAccelerated()) {
            // Turn on hardware layers for performance
            setLayerType(LAYER_TYPE_HARDWARE, null);

            // force building the layer, so you don't get a blip early in an animation
            // when the layer is created layer
            buildLayer();
        }
    }

    @Override
    public View getContent() {
        return mContent;
    }

    /* LauncherTransitionable overrides */
    @Override
    public void onLauncherTransitionPrepare(Launcher l, boolean animated, boolean toWorkspace) {
        mAppsCustomizePane.onLauncherTransitionPrepare(l, animated, toWorkspace);
        mInTransition = true;
        mTransitioningToWorkspace = toWorkspace;

        if (toWorkspace) {
            // Going from All Apps -> Workspace
            setVisibilityOfSiblingsWithLowerZOrder(VISIBLE);
            // Stop the scrolling indicator - we don't want All Apps to be invalidating itself
            // during the transition, especially since it has a hardware layer set on it
            mAppsCustomizePane.cancelScrollingIndicatorAnimations();
        } else {
            // Going from Workspace -> All Apps
            mContent.setVisibility(VISIBLE);

            // Make sure the current page is loaded (we start loading the side pages after the
            // transition to prevent slowing down the animation)
            mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage(), true);

            if (!LauncherApplication.isScreenLarge()) {
                mAppsCustomizePane.showScrollingIndicator(true);
            }
        }

        if (mResetAfterTransition) {
            mAppsCustomizePane.reset();
            mResetAfterTransition = false;
        }
    }

    @Override
    public void onLauncherTransitionStart(Launcher l, boolean animated, boolean toWorkspace) {
        if (animated) {
            enableAndBuildHardwareLayer();
        }
    }

    @Override
    public void onLauncherTransitionStep(Launcher l, float t) {
        // Do nothing
    }

    @Override
    public void onLauncherTransitionEnd(Launcher l, boolean animated, boolean toWorkspace) {
        mAppsCustomizePane.onLauncherTransitionEnd(l, animated, toWorkspace);
        mInTransition = false;
        if (animated) {
            setLayerType(LAYER_TYPE_NONE, null);
        }

        if (!toWorkspace) {
            // Dismiss the workspace cling
            l.dismissWorkspaceCling(null);
            // Show the all apps cling (if not already shown)
            mAppsCustomizePane.showAllAppsCling();
            // Make sure adjacent pages are loaded (we wait until after the transition to
            // prevent slowing down the animation)
            mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage());

            if (!LauncherApplication.isScreenLarge()) {
                mAppsCustomizePane.hideScrollingIndicator(false);
            }

            // Going from Workspace -> All Apps
            // NOTE: We should do this at the end since we check visibility state in some of the
            // cling initialization/dismiss code above.
            setVisibilityOfSiblingsWithLowerZOrder(INVISIBLE);
        }
    }

    private void setVisibilityOfSiblingsWithLowerZOrder(int visibility) {
        ViewGroup parent = (ViewGroup) getParent();
        if (parent == null) return;

        final int count = parent.getChildCount();
        if (!isChildrenDrawingOrderEnabled()) {
            for (int i = 0; i < count; i++) {
                final View child = parent.getChildAt(i);
                if (child == this) {
                    break;
                } else {
                    if (child.getVisibility() == GONE) {
                        continue;
                    }
                    child.setVisibility(visibility);
                }
            }
        } else {
            throw new RuntimeException("Failed; can't get z-order of views");
        }
    }

    public void onWindowVisible() {
        if (getVisibility() == VISIBLE) {
            mContent.setVisibility(VISIBLE);
            // We unload the widget previews when the UI is hidden, so need to reload pages
            // Load the current page synchronously, and the neighboring pages asynchronously
            mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage(), true);
            mAppsCustomizePane.loadAssociatedPages(mAppsCustomizePane.getCurrentPage());
        }
    }

    public void onTrimMemory() {
        mContent.setVisibility(GONE);
        // Clear the widget pages of all their subviews - this will trigger the widget previews
        // to delete their bitmaps
        mAppsCustomizePane.clearAllWidgetPages();
    }

    boolean isTransitioning() {
        return mInTransition;
    }
}