ButtonDropTarget.java revision 92f3d46cf35e78891f73226e81f8ca7e9a7f4d92 
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
17package com.android.launcher2;
18
19import android.content.Context;
20import android.content.res.Resources;
21import android.graphics.Paint;
22import android.util.AttributeSet;
23import android.widget.TextView;
24
25import com.android.launcher.R;
26
27
28/**
29 * Implements a DropTarget.
30 */
31public class ButtonDropTarget extends TextView implements DropTarget, DragController.DragListener {
32
33    protected final int mTransitionDuration;
34
35    protected Launcher mLauncher;
36    private int mBottomDragPadding;
37    protected TextView mText;
38    protected SearchDropTargetBar mSearchDropTargetBar;
39
40    /** Whether this drop target is active for the current drag */
41    protected boolean mActive;
42
43    /** The paint applied to the drag view on hover */
44    protected final Paint mHoverPaint = new Paint();
45
46    public ButtonDropTarget(Context context, AttributeSet attrs) {
47        this(context, attrs, 0);
48    }
49
50    public ButtonDropTarget(Context context, AttributeSet attrs, int defStyle) {
51        super(context, attrs, defStyle);
52
53        Resources r = getResources();
54        mTransitionDuration = r.getInteger(R.integer.config_dropTargetBgTransitionDuration);
55        mBottomDragPadding = r.getDimensionPixelSize(R.dimen.drop_target_drag_padding);
56    }
57
58    void setLauncher(Launcher launcher) {
59        mLauncher = launcher;
60    }
61
62    public boolean acceptDrop(DragObject d) {
63        return false;
64    }
65
66    public void setSearchDropTargetBar(SearchDropTargetBar searchDropTargetBar) {
67        mSearchDropTargetBar = searchDropTargetBar;
68    }
69
70    public void onDrop(DragObject d) {
71    }
72
73    public void onDragEnter(DragObject d) {
74        d.dragView.setPaint(mHoverPaint);
75    }
76
77    public void onDragOver(DragObject d) {
78        // Do nothing
79    }
80
81    public void onDragExit(DragObject d) {
82        d.dragView.setPaint(null);
83    }
84
85    public void onDragStart(DragSource source, Object info, int dragAction) {
86        // Do nothing
87    }
88
89    public boolean isDropEnabled() {
90        return mActive;
91    }
92
93    public void onDragEnd() {
94        // Do nothing
95    }
96
97    @Override
98    public void getHitRect(android.graphics.Rect outRect) {
99        super.getHitRect(outRect);
100        outRect.bottom += mBottomDragPadding;
101    }
102
103    @Override
104    public DropTarget getDropTargetDelegate(DragObject d) {
105        return null;
106    }
107
108    public void getLocationInDragLayer(int[] loc) {
109        mLauncher.getDragLayer().getLocationInDragLayer(this, loc);
110    }
111}
112