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/*
* Copyright (c) 2011, Polidea
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the distribution.
* Neither the name of the Polidea nor the names of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package pl.polidea.coverflow;
import android.R.color;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Shader.TileMode;
/**
* This adapter provides reflected images from linked adapter.
*
* @author potiuk
*
*/
public class ReflectingImageAdapter extends AbstractCoverFlowImageAdapter {
/** The linked adapter. */
private final AbstractCoverFlowImageAdapter linkedAdapter;
/**
* Gap between the image and its reflection.
*/
private float reflectionGap;
/** The image reflection ratio. */
private float imageReflectionRatio;
/**
* Sets the width ratio.
*
* @param imageReflectionRatio
* the new width ratio
*/
public void setWidthRatio(final float imageReflectionRatio) {
this.imageReflectionRatio = imageReflectionRatio;
}
/**
* Creates reflecting adapter.
*
* @param linkedAdapter
* adapter that provides images to get reflections
*/
public ReflectingImageAdapter(
final AbstractCoverFlowImageAdapter linkedAdapter) {
super();
this.linkedAdapter = linkedAdapter;
}
/**
* Sets the reflection gap.
*
* @param reflectionGap
* the new reflection gap
*/
public void setReflectionGap(final float reflectionGap) {
this.reflectionGap = reflectionGap;
}
/**
* Gets the reflection gap.
*
* @return the reflection gap
*/
public float getReflectionGap() {
return reflectionGap;
}
/*
* (non-Javadoc)
*
* @see pl.polidea.coverflow.AbstractCoverFlowImageAdapter#createBitmap(int)
*/
@Override
protected Bitmap createBitmap(final int position) {
return createReflectedImages(linkedAdapter.getItem(position));
}
/**
* Creates the reflected images.
*
* @param originalImage
* the original image
* @return true, if successful
*/
public Bitmap createReflectedImages(final Bitmap originalImage) {
final int width = originalImage.getWidth();
final int height = originalImage.getHeight();
final Matrix matrix = new Matrix();
matrix.preScale(1, -1);
final Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,
(int) (height * imageReflectionRatio), width,
(int) (height - height * imageReflectionRatio), matrix,
false);
final Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
(int) (height + height * imageReflectionRatio),
Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(originalImage, 0, 0, null);
final Paint deafaultPaint = new Paint();
deafaultPaint.setColor(color.transparent);
canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);
final Paint paint = new Paint();
final LinearGradient shader = new LinearGradient(0,
originalImage.getHeight(), 0,
bitmapWithReflection.getHeight() + reflectionGap,
0x70ffffff, 0x00ffffff, TileMode.CLAMP);
paint.setShader(shader);
paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
+ reflectionGap, paint);
return bitmapWithReflection;
}
/*
* (non-Javadoc)
*
* @see android.widget.Adapter#getCount()
*/
@Override
public int getCount() {
return linkedAdapter.getCount();
}
}
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