Android example source code file (PictureDrawable.java)

This example Android source code file (PictureDrawable.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, content, drawing, graphics, override, paint, picture, picturedrawable, rect, ui, view

The PictureDrawable.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 android.graphics.drawable;

import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Matrix.ScaleToFit;
import android.graphics.drawable.Drawable;
import android.graphics.Picture;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.view.Gravity;

/**
 * Drawable subclass that wraps a Picture, allowing the picture to be used
 * whereever a Drawable is supported.
 */
public class PictureDrawable extends Drawable {

    private Picture mPicture;

    /**
     * Construct a new drawable referencing the specified picture. The picture
     * may be null.
     *
     * @param picture The picture to associate with the drawable. May be null.
     */
    public PictureDrawable(Picture picture) {
        mPicture = picture;
    }
    
    /**
     * Return the picture associated with the drawable. May be null.
     *
     * @return the picture associated with the drawable, or null.
     */
    public Picture getPicture() {
        return mPicture;
    }
    
    /**
     * Associate a picture with this drawable. The picture may be null.
     *
     * @param picture The picture to associate with the drawable. May be null.
     */
    public void setPicture(Picture picture) {
        mPicture = picture;
    }
    
    @Override
    public void draw(Canvas canvas) {
        if (mPicture != null) {
            Rect bounds = getBounds();
            canvas.save();
            canvas.clipRect(bounds);
            canvas.translate(bounds.left, bounds.top);
            canvas.drawPicture(mPicture);
            canvas.restore();
        }
    }

    @Override
    public int getIntrinsicWidth() {
        return mPicture != null ? mPicture.getWidth() : -1;
    }

    @Override
    public int getIntrinsicHeight() {
        return mPicture != null ? mPicture.getHeight() : -1;
    }

    @Override
    public int getOpacity() {
        // not sure, so be safe
        return PixelFormat.TRANSLUCENT;
    }
    
    @Override
    public void setFilterBitmap(boolean filter) {}
    
    @Override
    public void setDither(boolean dither) {}
    
    @Override
    public void setColorFilter(ColorFilter colorFilter) {}
    
    @Override
    public void setAlpha(int alpha) {}
}