/*
* JBoss, Home of Professional Open Source
* Copyright 2010, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.renderkit.html.images;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import javax.faces.context.FacesContext;
import org.richfaces.renderkit.util.ColorUtils;
import org.richfaces.resource.AbstractJava2DUserResource;
import org.richfaces.resource.DynamicUserResource;
import org.richfaces.resource.ImageType;
import org.richfaces.resource.Java2DAnimatedUserResource;
import org.richfaces.resource.PostConstructResource;
import org.richfaces.resource.StateHolderResource;
import org.richfaces.skin.Skin;
import org.richfaces.skin.SkinFactory;
/**
* @author Nick Belaevski
*
*/
// TODO - add version
@DynamicUserResource
public class ProgressBarAnimatedBackgroundImage extends AbstractJava2DUserResource implements Java2DAnimatedUserResource,
StateHolderResource {
private static final int NUMBER_OF_FRAMES = 12;
private static final Dimension DIMENSION = new Dimension(24, 48);
private int frameNumber = 0;
private Integer basicColor;
public ProgressBarAnimatedBackgroundImage() {
super(ImageType.GIF, DIMENSION);
}
public boolean isLooped() {
return true;
}
public int getFrameDelay() {
return 1000;
}
public void startFramesSequence() {
frameNumber = 0;
}
public boolean hasNextFrame() {
return frameNumber < NUMBER_OF_FRAMES;
}
@PostConstructResource
public void initialize() {
FacesContext context = FacesContext.getCurrentInstance();
Skin skin = SkinFactory.getInstance(context).getSkin(context);
Skin defaultSkin = SkinFactory.getInstance(context).getDefaultSkin(context);
basicColor = skin.getColorParameter(context, Skin.SELECT_CONTROL_COLOR);
if (basicColor == null) {
basicColor = defaultSkin.getColorParameter(context, Skin.SELECT_CONTROL_COLOR);
}
}
/**
* Creates a main stage for progress bar background.
*
* @param context resource context
* @return a <code>BufferedImage</code> object
*/
private BufferedImage createMainStage() {
Color progressbarBackgroundColor = new Color(basicColor);
Color progressbarSpiralColor = ColorUtils.adjustLightness(progressbarBackgroundColor, 0.2f);
Dimension dimension = getDimension();
BufferedImage retVal = getImageType().createImage(dimension.width, dimension.height * 2);
Graphics g = retVal.getGraphics();
try {
g.setColor(progressbarBackgroundColor);
g.fillRect(0, 0, dimension.width, dimension.height * 2);
g.setColor(progressbarSpiralColor);
for (int k : new int[] { -24, 0, 24, 48, 72 }) {
g.fillPolygon(new int[] { 0, 24, 24, 0 }, new int[] { 24 + k, k, 12 + k, 36 + k }, 4);
}
} finally {
if (g != null) {
g.dispose();
}
}
return retVal;
}
public void paint(Graphics2D g2d) {
frameNumber++;
Dimension dimension = getDimension();
BufferedImage mainStage = createMainStage();
BufferedImage frame = mainStage.getSubimage(0, 48 - frameNumber * 2, dimension.width, dimension.height);
g2d.drawImage(frame, null, null);
Color progressbarBackgroundColor = new Color(basicColor);
Color progressbarShadowStartColor = ColorUtils.overwriteAlpha(
ColorUtils.adjustLightness(progressbarBackgroundColor, 0.7f), 0.6f);
Color progressbarShadowEndColor = ColorUtils.overwriteAlpha(
ColorUtils.adjustLightness(progressbarBackgroundColor, 0.3f), 0.6f);
// paint a shadow in the form of semi-transparent gradient
g2d.setPaint(new GradientPaint(0, 0, progressbarShadowStartColor, 0, 7, progressbarShadowEndColor));
g2d.fillRect(0, 0, dimension.width, 7);
}
public boolean isTransient() {
return false;
}
public void writeState(FacesContext context, DataOutput dataOutput) throws IOException {
dataOutput.writeInt(basicColor);
}
public void readState(FacesContext context, DataInput dataInput) throws IOException {
basicColor = dataInput.readInt();
}
}