Android example source code file (ProxyDrawable.java)

This example Android source code file (ProxyDrawable.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, drawable, drawing, graphics, override, paint, proxydrawable, ui

The ProxyDrawable.java Android example source code

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.graphics;

import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.PixelFormat;
import android.graphics.drawable.Drawable;

public class ProxyDrawable extends Drawable {
    
    private Drawable mProxy;
    private boolean mMutated;

    public ProxyDrawable(Drawable target) {
        mProxy = target;
    }
    
    public Drawable getProxy() {
        return mProxy;
    }
    
    public void setProxy(Drawable proxy) {
        if (proxy != this) {
            mProxy = proxy;
        }
    }

    @Override
    public void draw(Canvas canvas) {
        if (mProxy != null) {
            mProxy.draw(canvas);
        }
    }
    
    @Override
    public int getIntrinsicWidth() {
        return mProxy != null ? mProxy.getIntrinsicWidth() : -1;
    }
    
    @Override
    public int getIntrinsicHeight() {
        return mProxy != null ? mProxy.getIntrinsicHeight() : -1;
    }
    
    @Override
    public int getOpacity() {
        return mProxy != null ? mProxy.getOpacity() : PixelFormat.TRANSPARENT;
    }
    
    @Override
    public void setFilterBitmap(boolean filter) {
        if (mProxy != null) {
            mProxy.setFilterBitmap(filter);
        }
    }
    
    @Override
    public void setDither(boolean dither) {
        if (mProxy != null) {
            mProxy.setDither(dither);
        }
    }
    
    @Override
    public void setColorFilter(ColorFilter colorFilter) {
        if (mProxy != null) {
            mProxy.setColorFilter(colorFilter);
        }
    }
    
    @Override
    public void setAlpha(int alpha) {
        if (mProxy != null) {
            mProxy.setAlpha(alpha);
        }
    }

    @Override
    public Drawable mutate() {
        if (mProxy != null && !mMutated && super.mutate() == this) {
            mProxy.mutate();
            mMutated = true;
        }
        return this;
    }
}