draw Wallpaper Selection Frame on Canvas - Android Graphics

Android examples for Graphics:Canvas

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Description

draw Wallpaper Selection Frame on Canvas

Demo Code

/*//from   w w  w  .j a v  a 2 s.  c o m
 * Copyright (C) 2013 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.java2s;
import android.graphics.Canvas;

import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.graphics.Region;

public class Main {
    public static void drawWallpaperSelectionFrame(Canvas canvas,
            RectF cropBounds, float spotX, float spotY, Paint p,
            Paint shadowPaint) {
        float sx = cropBounds.width() * spotX;
        float sy = cropBounds.height() * spotY;
        float cx = cropBounds.centerX();
        float cy = cropBounds.centerY();
        RectF r1 = new RectF(cx - sx / 2, cy - sy / 2, cx + sx / 2, cy + sy
                / 2);
        float temp = sx;
        sx = sy;
        sy = temp;
        RectF r2 = new RectF(cx - sx / 2, cy - sy / 2, cx + sx / 2, cy + sy
                / 2);
        canvas.save();
        canvas.clipRect(cropBounds);
        canvas.clipRect(r1, Region.Op.DIFFERENCE);
        canvas.clipRect(r2, Region.Op.DIFFERENCE);
        canvas.drawPaint(shadowPaint);
        canvas.restore();
        Path path = new Path();
        path.moveTo(r1.left, r1.top);
        path.lineTo(r1.right, r1.top);
        path.moveTo(r1.left, r1.top);
        path.lineTo(r1.left, r1.bottom);
        path.moveTo(r1.left, r1.bottom);
        path.lineTo(r1.right, r1.bottom);
        path.moveTo(r1.right, r1.top);
        path.lineTo(r1.right, r1.bottom);
        path.moveTo(r2.left, r2.top);
        path.lineTo(r2.right, r2.top);
        path.moveTo(r2.right, r2.top);
        path.lineTo(r2.right, r2.bottom);
        path.moveTo(r2.left, r2.bottom);
        path.lineTo(r2.right, r2.bottom);
        path.moveTo(r2.left, r2.top);
        path.lineTo(r2.left, r2.bottom);
        canvas.drawPath(path, p);
    }
}

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