1 /*
2  * Copyright (C) 2011 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 com.android.launcher2;
18 
19 import android.animation.Animator;
20 import android.animation.AnimatorListenerAdapter;
21 import android.animation.ObjectAnimator;
22 import android.content.Context;
23 import android.graphics.Rect;
24 import android.graphics.drawable.Drawable;
25 import android.util.AttributeSet;
26 import android.view.View;
27 import android.view.animation.AccelerateInterpolator;
28 import android.widget.FrameLayout;
29 
30 import com.android.launcher.R;
31 
32 /*
33  * Ths bar will manage the transition between the QSB search bar and the delete drop
34  * targets so that each of the individual IconDropTargets don't have to.
35  */
36 public class SearchDropTargetBar extends FrameLayout implements DragController.DragListener {
37 
38     private static final int sTransitionInDuration = 200;
39     private static final int sTransitionOutDuration = 175;
40 
41     private ObjectAnimator mDropTargetBarAnim;
42     private ObjectAnimator mQSBSearchBarAnim;
43     private static final AccelerateInterpolator sAccelerateInterpolator =
44             new AccelerateInterpolator();
45 
46     private boolean mIsSearchBarHidden;
47     private View mQSBSearchBar;
48     private View mDropTargetBar;
49     private ButtonDropTarget mInfoDropTarget;
50     private ButtonDropTarget mDeleteDropTarget;
51     private int mBarHeight;
52     private boolean mDeferOnDragEnd = false;
53 
54     private Drawable mPreviousBackground;
55     private boolean mEnableDropDownDropTargets;
56 
SearchDropTargetBar(Context context, AttributeSet attrs)57     public SearchDropTargetBar(Context context, AttributeSet attrs) {
58         this(context, attrs, 0);
59     }
60 
SearchDropTargetBar(Context context, AttributeSet attrs, int defStyle)61     public SearchDropTargetBar(Context context, AttributeSet attrs, int defStyle) {
62         super(context, attrs, defStyle);
63     }
64 
setup(Launcher launcher, DragController dragController)65     public void setup(Launcher launcher, DragController dragController) {
66         dragController.addDragListener(this);
67         dragController.addDragListener(mInfoDropTarget);
68         dragController.addDragListener(mDeleteDropTarget);
69         dragController.addDropTarget(mInfoDropTarget);
70         dragController.addDropTarget(mDeleteDropTarget);
71         dragController.setFlingToDeleteDropTarget(mDeleteDropTarget);
72         mInfoDropTarget.setLauncher(launcher);
73         mDeleteDropTarget.setLauncher(launcher);
74     }
75 
prepareStartAnimation(View v)76     private void prepareStartAnimation(View v) {
77         // Enable the hw layers before the animation starts (will be disabled in the onAnimationEnd
78         // callback below)
79         v.setLayerType(View.LAYER_TYPE_HARDWARE, null);
80     }
81 
setupAnimation(ObjectAnimator anim, final View v)82     private void setupAnimation(ObjectAnimator anim, final View v) {
83         anim.setInterpolator(sAccelerateInterpolator);
84         anim.setDuration(sTransitionInDuration);
85         anim.addListener(new AnimatorListenerAdapter() {
86             @Override
87             public void onAnimationEnd(Animator animation) {
88                 v.setLayerType(View.LAYER_TYPE_NONE, null);
89             }
90         });
91     }
92 
93     @Override
onFinishInflate()94     protected void onFinishInflate() {
95         super.onFinishInflate();
96 
97         // Get the individual components
98         mQSBSearchBar = findViewById(R.id.qsb_search_bar);
99         mDropTargetBar = findViewById(R.id.drag_target_bar);
100         mInfoDropTarget = (ButtonDropTarget) mDropTargetBar.findViewById(R.id.info_target_text);
101         mDeleteDropTarget = (ButtonDropTarget) mDropTargetBar.findViewById(R.id.delete_target_text);
102         mBarHeight = getResources().getDimensionPixelSize(R.dimen.qsb_bar_height);
103 
104         mInfoDropTarget.setSearchDropTargetBar(this);
105         mDeleteDropTarget.setSearchDropTargetBar(this);
106 
107         mEnableDropDownDropTargets =
108             getResources().getBoolean(R.bool.config_useDropTargetDownTransition);
109 
110         // Create the various fade animations
111         if (mEnableDropDownDropTargets) {
112             mDropTargetBar.setTranslationY(-mBarHeight);
113             mDropTargetBarAnim = ObjectAnimator.ofFloat(mDropTargetBar, "translationY", -mBarHeight, 0f);
114             mQSBSearchBarAnim = ObjectAnimator.ofFloat(mQSBSearchBar, "translationY", 0f, -mBarHeight);
115         } else {
116             mDropTargetBar.setAlpha(0f);
117             mDropTargetBarAnim = ObjectAnimator.ofFloat(mDropTargetBar, "alpha", 0f, 1f);
118             mQSBSearchBarAnim = ObjectAnimator.ofFloat(mQSBSearchBar, "alpha", 1f, 0f);
119         }
120         setupAnimation(mDropTargetBarAnim, mDropTargetBar);
121         setupAnimation(mQSBSearchBarAnim, mQSBSearchBar);
122     }
123 
finishAnimations()124     public void finishAnimations() {
125         prepareStartAnimation(mDropTargetBar);
126         mDropTargetBarAnim.reverse();
127         prepareStartAnimation(mQSBSearchBar);
128         mQSBSearchBarAnim.reverse();
129     }
130 
131     /*
132      * Shows and hides the search bar.
133      */
showSearchBar(boolean animated)134     public void showSearchBar(boolean animated) {
135         if (!mIsSearchBarHidden) return;
136         if (animated) {
137             prepareStartAnimation(mQSBSearchBar);
138             mQSBSearchBarAnim.reverse();
139         } else {
140             mQSBSearchBarAnim.cancel();
141             if (mEnableDropDownDropTargets) {
142                 mQSBSearchBar.setTranslationY(0);
143             } else {
144                 mQSBSearchBar.setAlpha(1f);
145             }
146         }
147         mIsSearchBarHidden = false;
148     }
hideSearchBar(boolean animated)149     public void hideSearchBar(boolean animated) {
150         if (mIsSearchBarHidden) return;
151         if (animated) {
152             prepareStartAnimation(mQSBSearchBar);
153             mQSBSearchBarAnim.start();
154         } else {
155             mQSBSearchBarAnim.cancel();
156             if (mEnableDropDownDropTargets) {
157                 mQSBSearchBar.setTranslationY(-mBarHeight);
158             } else {
159                 mQSBSearchBar.setAlpha(0f);
160             }
161         }
162         mIsSearchBarHidden = true;
163     }
164 
165     /*
166      * Gets various transition durations.
167      */
getTransitionInDuration()168     public int getTransitionInDuration() {
169         return sTransitionInDuration;
170     }
getTransitionOutDuration()171     public int getTransitionOutDuration() {
172         return sTransitionOutDuration;
173     }
174 
175     /*
176      * DragController.DragListener implementation
177      */
178     @Override
onDragStart(DragSource source, Object info, int dragAction)179     public void onDragStart(DragSource source, Object info, int dragAction) {
180         // Animate out the QSB search bar, and animate in the drop target bar
181         prepareStartAnimation(mDropTargetBar);
182         mDropTargetBarAnim.start();
183         if (!mIsSearchBarHidden) {
184             prepareStartAnimation(mQSBSearchBar);
185             mQSBSearchBarAnim.start();
186         }
187     }
188 
deferOnDragEnd()189     public void deferOnDragEnd() {
190         mDeferOnDragEnd = true;
191     }
192 
193     @Override
onDragEnd()194     public void onDragEnd() {
195         if (!mDeferOnDragEnd) {
196             // Restore the QSB search bar, and animate out the drop target bar
197             prepareStartAnimation(mDropTargetBar);
198             mDropTargetBarAnim.reverse();
199             if (!mIsSearchBarHidden) {
200                 prepareStartAnimation(mQSBSearchBar);
201                 mQSBSearchBarAnim.reverse();
202             }
203         } else {
204             mDeferOnDragEnd = false;
205         }
206     }
207 
onSearchPackagesChanged(boolean searchVisible, boolean voiceVisible)208     public void onSearchPackagesChanged(boolean searchVisible, boolean voiceVisible) {
209         if (mQSBSearchBar != null) {
210             Drawable bg = mQSBSearchBar.getBackground();
211             if (bg != null && (!searchVisible && !voiceVisible)) {
212                 // Save the background and disable it
213                 mPreviousBackground = bg;
214                 mQSBSearchBar.setBackgroundResource(0);
215             } else if (mPreviousBackground != null && (searchVisible || voiceVisible)) {
216                 // Restore the background
217                 mQSBSearchBar.setBackground(mPreviousBackground);
218             }
219         }
220     }
221 
getSearchBarBounds()222     public Rect getSearchBarBounds() {
223         if (mQSBSearchBar != null) {
224             final int[] pos = new int[2];
225             mQSBSearchBar.getLocationOnScreen(pos);
226 
227             final Rect rect = new Rect();
228             rect.left = pos[0];
229             rect.top = pos[1];
230             rect.right = pos[0] + mQSBSearchBar.getWidth();
231             rect.bottom = pos[1] + mQSBSearchBar.getHeight();
232             return rect;
233         } else {
234             return null;
235         }
236     }
237 }
238