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.launcher3;
18
19import android.content.Context;
20import android.graphics.Bitmap;
21import android.graphics.Canvas;
22import android.graphics.Region;
23import android.graphics.Region.Op;
24import android.util.AttributeSet;
25import android.util.TypedValue;
26import android.widget.TextView;
27
28/**
29 * An icon on a PagedView, specifically for items in the launcher's paged view (with compound
30 * drawables on the top).
31 */
32public class PagedViewIcon extends TextView {
33    /** A simple callback interface to allow a PagedViewIcon to notify when it has been pressed */
34    public static interface PressedCallback {
35        void iconPressed(PagedViewIcon icon);
36    }
37
38    @SuppressWarnings("unused")
39    private static final String TAG = "PagedViewIcon";
40    private static final float PRESS_ALPHA = 0.4f;
41
42    private PagedViewIcon.PressedCallback mPressedCallback;
43    private boolean mLockDrawableState = false;
44
45    private Bitmap mIcon;
46
47    public PagedViewIcon(Context context) {
48        this(context, null);
49    }
50
51    public PagedViewIcon(Context context, AttributeSet attrs) {
52        this(context, attrs, 0);
53    }
54
55    public PagedViewIcon(Context context, AttributeSet attrs, int defStyle) {
56        super(context, attrs, defStyle);
57    }
58
59    public void onFinishInflate() {
60        super.onFinishInflate();
61
62        // Ensure we are using the right text size
63        LauncherAppState app = LauncherAppState.getInstance();
64        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
65        setTextSize(TypedValue.COMPLEX_UNIT_SP, grid.iconTextSize);
66    }
67
68    public void applyFromApplicationInfo(AppInfo info, boolean scaleUp,
69            PagedViewIcon.PressedCallback cb) {
70        mIcon = info.iconBitmap;
71        mPressedCallback = cb;
72        setCompoundDrawables(null, Utilities.createIconDrawable(mIcon),
73                null, null);
74        setText(info.title);
75        setTag(info);
76    }
77
78    public void lockDrawableState() {
79        mLockDrawableState = true;
80    }
81
82    public void resetDrawableState() {
83        mLockDrawableState = false;
84        post(new Runnable() {
85            @Override
86            public void run() {
87                refreshDrawableState();
88            }
89        });
90    }
91
92    protected void drawableStateChanged() {
93        super.drawableStateChanged();
94
95        // We keep in the pressed state until resetDrawableState() is called to reset the press
96        // feedback
97        if (isPressed()) {
98            setAlpha(PRESS_ALPHA);
99            if (mPressedCallback != null) {
100                mPressedCallback.iconPressed(this);
101            }
102        } else if (!mLockDrawableState) {
103            setAlpha(1f);
104        }
105    }
106
107    @Override
108    public void draw(Canvas canvas) {
109        // If text is transparent, don't draw any shadow
110        if (getCurrentTextColor() == getResources().getColor(android.R.color.transparent)) {
111            getPaint().clearShadowLayer();
112            super.draw(canvas);
113            return;
114        }
115
116        // We enhance the shadow by drawing the shadow twice
117        getPaint().setShadowLayer(BubbleTextView.SHADOW_LARGE_RADIUS, 0.0f,
118                BubbleTextView.SHADOW_Y_OFFSET, BubbleTextView.SHADOW_LARGE_COLOUR);
119        super.draw(canvas);
120        canvas.save(Canvas.CLIP_SAVE_FLAG);
121        canvas.clipRect(getScrollX(), getScrollY() + getExtendedPaddingTop(),
122                getScrollX() + getWidth(),
123                getScrollY() + getHeight(), Region.Op.INTERSECT);
124        getPaint().setShadowLayer(BubbleTextView.SHADOW_SMALL_RADIUS, 0.0f, 0.0f,
125                BubbleTextView.SHADOW_SMALL_COLOUR);
126        super.draw(canvas);
127        canvas.restore();
128    }
129}
130