FolderIcon.java revision a9cf38f533d1e86269868f1e6a806ccffd4a78fc 
1/*
2 * Copyright (C) 2008 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.Canvas;
22import android.graphics.drawable.Drawable;
23import android.util.AttributeSet;
24import android.view.LayoutInflater;
25import android.view.ViewGroup;
26import android.widget.FrameLayout;
27import android.widget.TextView;
28
29import com.android.launcher.R;
30import com.android.launcher2.FolderInfo.FolderListener;
31
32/**
33 * An icon that can appear on in the workspace representing an {@link UserFolder}.
34 */
35public class FolderIcon extends FrameLayout implements DropTarget, FolderListener {
36    private Launcher mLauncher;
37    Folder mFolder;
38    FolderInfo mInfo;
39
40    private static final int NUM_ITEMS_IN_PREVIEW = 4;
41    private static final float ICON_ANGLE = 15f;
42
43    public FolderIcon(Context context, AttributeSet attrs) {
44        super(context, attrs);
45    }
46
47    public FolderIcon(Context context) {
48        super(context);
49    }
50
51    public boolean isDropEnabled() {
52        final ViewGroup cellLayoutChildren = (ViewGroup) getParent();
53        final ViewGroup cellLayout = (ViewGroup) cellLayoutChildren.getParent();
54        final Workspace workspace = (Workspace) cellLayout.getParent();
55        return !workspace.isSmall();
56    }
57
58    static FolderIcon fromXml(int resId, Launcher launcher, ViewGroup group,
59            FolderInfo folderInfo, IconCache iconCache) {
60
61        FolderIcon icon = (FolderIcon) LayoutInflater.from(launcher).inflate(resId, group, false);
62
63        final Resources resources = launcher.getResources();
64        Drawable d = iconCache.getFullResIcon(resources, R.drawable.folder_bg);
65        icon.setBackgroundDrawable(d);
66        icon.setTag(folderInfo);
67        icon.setOnClickListener(launcher);
68        icon.mInfo = folderInfo;
69        icon.mLauncher = launcher;
70
71        Folder folder = Folder.fromXml(launcher);
72        folder.setDragController(launcher.getDragController());
73        folder.setLauncher(launcher);
74        folder.bind(folderInfo);
75        icon.mFolder = folder;
76
77        folderInfo.addListener(icon);
78
79        return icon;
80    }
81
82    public boolean acceptDrop(DragSource source, int x, int y, int xOffset, int yOffset,
83            DragView dragView, Object dragInfo) {
84        final ItemInfo item = (ItemInfo) dragInfo;
85        final int itemType = item.itemType;
86        return (itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION ||
87                itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT)
88                && item.container != mInfo.id;
89    }
90
91    public void addItem(ShortcutInfo item) {
92        mInfo.add(item);
93        LauncherModel.addOrMoveItemInDatabase(mLauncher, item, mInfo.id, 0, item.cellX, item.cellY);
94    }
95
96    public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset,
97            DragView dragView, Object dragInfo) {
98        ShortcutInfo item;
99        if (dragInfo instanceof ApplicationInfo) {
100            // Came from all apps -- make a copy
101            item = ((ApplicationInfo)dragInfo).makeShortcut();
102        } else {
103            item = (ShortcutInfo)dragInfo;
104        }
105        item.cellX = -1;
106        item.cellY = -1;
107        addItem(item);
108    }
109
110    public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset,
111            DragView dragView, Object dragInfo) {
112    }
113
114    public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset,
115            DragView dragView, Object dragInfo) {
116    }
117
118    public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset,
119            DragView dragView, Object dragInfo) {
120    }
121
122    @Override
123    public DropTarget getDropTargetDelegate(DragSource source, int x, int y, int xOffset, int yOffset,
124            DragView dragView, Object dragInfo) {
125        return null;
126    }
127
128    @Override
129    protected void onDraw(Canvas canvas) {
130        if (mFolder == null) return;
131        if (mFolder.getItemCount() == 0) return;
132
133        canvas.save();
134        TextView v = (TextView) mFolder.getItemAt(0);
135        Drawable d = v.getCompoundDrawables()[1];
136
137        canvas.translate( (getMeasuredWidth() - d.getIntrinsicWidth()) / 2,
138                (getMeasuredHeight() - d.getIntrinsicHeight()) / 2);
139
140        canvas.translate(d.getIntrinsicWidth() / 2, d.getIntrinsicHeight() / 2);
141        canvas.rotate(ICON_ANGLE);
142
143        canvas.translate(-d.getIntrinsicWidth() / 2, -d.getIntrinsicHeight() / 2);
144
145        for (int i = Math.max(0, mFolder.getItemCount() - NUM_ITEMS_IN_PREVIEW);
146                i < mFolder.getItemCount(); i++) {
147            v = (TextView) mFolder.getItemAt(i);
148            d = v.getCompoundDrawables()[1];
149
150            if (d != null) {
151                d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
152                d.draw(canvas);
153            }
154
155            canvas.translate(d.getIntrinsicWidth() / 2, d.getIntrinsicHeight() / 2);
156            canvas.rotate(-ICON_ANGLE);
157            canvas.translate(-d.getIntrinsicWidth() / 2, -d.getIntrinsicHeight() / 2);
158        }
159
160        canvas.restore();
161    }
162
163    public void onAdd(ShortcutInfo item) {
164        invalidate();
165        requestLayout();
166    }
167
168    public void onRemove(ShortcutInfo item) {
169        invalidate();
170        requestLayout();
171    }
172}
173