graphics/java/android/graphics/drawable/shapes/PathShape.java

/*
 * Copyright (C) 2007 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.shapes;

import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;

/**
 * Creates geometric paths, utilizing the {@link android.graphics.Path} class.
 * The path can be drawn to a Canvas with its own draw() method,
 * but more graphical control is available if you instead pass
 * the PathShape to a {@link android.graphics.drawable.ShapeDrawable}.
 */
public class PathShape extends Shape {
    private Path    mPath;
    private float   mStdWidth;
    private float   mStdHeight;
    
    private float   mScaleX;    // cached from onResize
    private float   mScaleY;    // cached from onResize
    
    /**
     * PathShape constructor.
     * 
     * @param path       a Path that defines the geometric paths for this shape
     * @param stdWidth   the standard width for the shape. Any changes to the 
     *                   width with resize() will result in a width scaled based
     *                   on the new width divided by this width.
     * @param stdHeight  the standard height for the shape. Any changes to the 
     *                   height with resize() will result in a height scaled based
     *                   on the new height divided by this height.
     */
    public PathShape(Path path, float stdWidth, float stdHeight) {
        mPath = path;
        mStdWidth = stdWidth;
        mStdHeight = stdHeight;
    }
    
    @Override
    public void draw(Canvas canvas, Paint paint) {
        canvas.save();
        canvas.scale(mScaleX, mScaleY);
        canvas.drawPath(mPath, paint);
        canvas.restore();
    }
    
    @Override
    protected void onResize(float width, float height) {
        mScaleX = width / mStdWidth;
        mScaleY = height / mStdHeight;
    }
}