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.content.ComponentName;
20 import android.content.Context;
21 import android.content.res.ColorStateList;
22 import android.content.res.Configuration;
23 import android.content.res.Resources;
24 import android.graphics.drawable.TransitionDrawable;
25 import android.os.UserHandle;
26 import android.util.AttributeSet;
27 import android.view.View;
28 import android.view.ViewGroup;
29 
30 import com.android.launcher.R;
31 
32 public class InfoDropTarget extends ButtonDropTarget {
33 
34     private ColorStateList mOriginalTextColor;
35     private TransitionDrawable mDrawable;
36 
InfoDropTarget(Context context, AttributeSet attrs)37     public InfoDropTarget(Context context, AttributeSet attrs) {
38         this(context, attrs, 0);
39     }
40 
InfoDropTarget(Context context, AttributeSet attrs, int defStyle)41     public InfoDropTarget(Context context, AttributeSet attrs, int defStyle) {
42         super(context, attrs, defStyle);
43     }
44 
45     @Override
onFinishInflate()46     protected void onFinishInflate() {
47         super.onFinishInflate();
48 
49         mOriginalTextColor = getTextColors();
50 
51         // Get the hover color
52         Resources r = getResources();
53         mHoverColor = r.getColor(R.color.info_target_hover_tint);
54         mDrawable = (TransitionDrawable) getCurrentDrawable();
55         if (null != mDrawable) {
56             mDrawable.setCrossFadeEnabled(true);
57         }
58 
59         // Remove the text in the Phone UI in landscape
60         int orientation = getResources().getConfiguration().orientation;
61         if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
62             if (!LauncherApplication.isScreenLarge()) {
63                 setText("");
64             }
65         }
66     }
67 
isFromAllApps(DragSource source)68     private boolean isFromAllApps(DragSource source) {
69         return (source instanceof AppsCustomizePagedView);
70     }
71 
72     @Override
acceptDrop(DragObject d)73     public boolean acceptDrop(DragObject d) {
74         // acceptDrop is called just before onDrop. We do the work here, rather than
75         // in onDrop, because it allows us to reject the drop (by returning false)
76         // so that the object being dragged isn't removed from the drag source.
77         ComponentName componentName = null;
78         if (d.dragInfo instanceof ApplicationInfo) {
79             componentName = ((ApplicationInfo) d.dragInfo).componentName;
80         } else if (d.dragInfo instanceof ShortcutInfo) {
81             componentName = ((ShortcutInfo) d.dragInfo).intent.getComponent();
82         } else if (d.dragInfo instanceof PendingAddItemInfo) {
83             componentName = ((PendingAddItemInfo) d.dragInfo).componentName;
84         }
85         final UserHandle user;
86         if (d.dragInfo instanceof ItemInfo) {
87             user = ((ItemInfo) d.dragInfo).user;
88         } else {
89             user = android.os.Process.myUserHandle();
90         }
91         if (componentName != null) {
92             mLauncher.startApplicationDetailsActivity(componentName, user);
93         }
94 
95         // There is no post-drop animation, so clean up the DragView now
96         d.deferDragViewCleanupPostAnimation = false;
97         return false;
98     }
99 
100     @Override
onDragStart(DragSource source, Object info, int dragAction)101     public void onDragStart(DragSource source, Object info, int dragAction) {
102         boolean isVisible = true;
103 
104         // Hide this button unless we are dragging something from AllApps
105         if (!isFromAllApps(source)) {
106             isVisible = false;
107         }
108 
109         mActive = isVisible;
110         mDrawable.resetTransition();
111         setTextColor(mOriginalTextColor);
112         ((ViewGroup) getParent()).setVisibility(isVisible ? View.VISIBLE : View.GONE);
113     }
114 
115     @Override
onDragEnd()116     public void onDragEnd() {
117         super.onDragEnd();
118         mActive = false;
119     }
120 
onDragEnter(DragObject d)121     public void onDragEnter(DragObject d) {
122         super.onDragEnter(d);
123 
124         mDrawable.startTransition(mTransitionDuration);
125         setTextColor(mHoverColor);
126     }
127 
onDragExit(DragObject d)128     public void onDragExit(DragObject d) {
129         super.onDragExit(d);
130 
131         if (!d.dragComplete) {
132             mDrawable.resetTransition();
133             setTextColor(mOriginalTextColor);
134         }
135     }
136 }
137