/*
* File : ScaledGraphic.java
* Created : 15 d�c. 2003}
* By : Olivier
*
* Azureus - a Java Bittorrent client
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*
* This program 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 General Public License for more details ( see the LICENSE file ).
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.gudy.azureus2.ui.swt.components.graphics;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.ui.swt.mainwindow.Colors;
/**
* @author Olivier
*
*/
public class ScaledGraphic extends BackGroundGraphic {
protected Scale scale;
protected ValueFormater formater;
protected Image bufferScale;
private int lastMax;
private int update_divider_width = 0;
public ScaledGraphic(Scale scale,ValueFormater formater) {
this.scale = scale;
this.formater = formater;
}
public void setUpdateDividerWidth(int width) {
this.update_divider_width = width;
}
protected void drawScale(boolean sizeChanged) {
if(drawCanvas == null || drawCanvas.isDisposed() || !drawCanvas.isVisible())
return;
drawBackGround(sizeChanged);
if (bufferBackground == null || bufferBackground.isDisposed()) {
return;
}
boolean scaleChanged = lastMax != scale.getMax();
if(sizeChanged || scaleChanged || bufferScale == null) {
Rectangle bounds = drawCanvas.getClientArea();
if(bounds.height < 30 || bounds.width < 100)
return;
if(bufferScale != null && ! bufferScale.isDisposed())
bufferScale.dispose();
bufferScale = new Image(drawCanvas.getDisplay(),bounds);
GC gcBuffer = new GC(bufferScale);
try {
gcBuffer.drawImage(bufferBackground,0,0);
gcBuffer.setForeground(Colors.black);
//gcImage.setBackground(null);
scale.setNbPixels(bounds.height - 16);
int[] levels = scale.getScaleValues();
for(int i = 0 ; i < levels.length ; i++) {
int height = bounds.height - scale.getScaledValue(levels[i]) - 2;
gcBuffer.drawLine(1,height,bounds.width - 70 ,height);
gcBuffer.drawText(formater.format(levels[i]),bounds.width - 65,height - 12,true);
}
if (this.update_divider_width > 0) {
for (int i=bounds.width - 70; i > 0; i-=this.update_divider_width) {
gcBuffer.setForeground(Colors.grey);
gcBuffer.drawLine(i, 0, i, bounds.height);
}
}
} catch (Exception e) {
Debug.out(e);
} finally {
gcBuffer.dispose();
}
}
}
public void dispose() {
super.dispose();
if(bufferScale != null && ! bufferScale.isDisposed())
bufferScale.dispose();
}
}