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.example.android.apis.graphics;
18
19import android.graphics.Canvas;
20import android.graphics.ColorFilter;
21import android.graphics.PixelFormat;
22import android.graphics.drawable.Drawable;
23
24public class ProxyDrawable extends Drawable {
25
26    private Drawable mProxy;
27    private boolean mMutated;
28
29    public ProxyDrawable(Drawable target) {
30        mProxy = target;
31    }
32
33    public Drawable getProxy() {
34        return mProxy;
35    }
36
37    public void setProxy(Drawable proxy) {
38        if (proxy != this) {
39            mProxy = proxy;
40        }
41    }
42
43    @Override
44    public void draw(Canvas canvas) {
45        if (mProxy != null) {
46            mProxy.draw(canvas);
47        }
48    }
49
50    @Override
51    public int getIntrinsicWidth() {
52        return mProxy != null ? mProxy.getIntrinsicWidth() : -1;
53    }
54
55    @Override
56    public int getIntrinsicHeight() {
57        return mProxy != null ? mProxy.getIntrinsicHeight() : -1;
58    }
59
60    @Override
61    public int getOpacity() {
62        return mProxy != null ? mProxy.getOpacity() : PixelFormat.TRANSPARENT;
63    }
64
65    @Override
66    public void setFilterBitmap(boolean filter) {
67        if (mProxy != null) {
68            mProxy.setFilterBitmap(filter);
69        }
70    }
71
72    @Override
73    public void setDither(boolean dither) {
74        if (mProxy != null) {
75            mProxy.setDither(dither);
76        }
77    }
78
79    @Override
80    public void setColorFilter(ColorFilter colorFilter) {
81        if (mProxy != null) {
82            mProxy.setColorFilter(colorFilter);
83        }
84    }
85
86    @Override
87    public void setAlpha(int alpha) {
88        if (mProxy != null) {
89            mProxy.setAlpha(alpha);
90        }
91    }
92
93    @Override
94    public Drawable mutate() {
95        if (mProxy != null && !mMutated && super.mutate() == this) {
96            mProxy.mutate();
97            mMutated = true;
98        }
99        return this;
100    }
101}
102
103