backgroundgraphic.java

java 文件下载器。可自定义

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   BackGroundGraphic.java

package org.gudy.azureus2.ui.swt.components.graphics;

import com.aelitis.azureus.ui.swt.utils.ColorCache;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.Canvas;
import org.gudy.azureus2.core3.util.AEMonitor;
import org.gudy.azureus2.ui.swt.mainwindow.Colors;

// Referenced classes of package org.gudy.azureus2.ui.swt.components.graphics:
//			Graphic

public class BackGroundGraphic
	implements Graphic
{

	protected Canvas drawCanvas;
	protected Image bufferBackground;
	protected Color lightGrey;
	protected Color lightGrey2;
	protected Color colorWhite;
	protected AEMonitor this_mon;

	public BackGroundGraphic()
	{
		this_mon = new AEMonitor("BackGroundGraphic");
	}

	public void initialize(Canvas canvas)
	{
		drawCanvas = canvas;
		lightGrey = ColorCache.getColor(canvas.getDisplay(), 250, 250, 250);
		lightGrey2 = ColorCache.getColor(canvas.getDisplay(), 233, 233, 233);
		colorWhite = ColorCache.getColor(canvas.getDisplay(), 255, 255, 255);
	}

	public void refresh()
	{
	}

	protected void drawBackGround(boolean sizeChanged)
	{
		if (drawCanvas == null || drawCanvas.isDisposed())
			return;
		if (sizeChanged || bufferBackground == null)
		{
			Rectangle bounds = drawCanvas.getClientArea();
			if (bounds.height < 30 || bounds.width < 100)
				return;
			if (bufferBackground != null && !bufferBackground.isDisposed())
				bufferBackground.dispose();
			if (bounds.width > 10000 || bounds.height > 10000)
				return;
			bufferBackground = new Image(drawCanvas.getDisplay(), bounds);
			Color colors[] = new Color[4];
			colors[0] = colorWhite;
			colors[1] = lightGrey;
			colors[2] = lightGrey2;
			colors[3] = lightGrey;
			GC gcBuffer = new GC(bufferBackground);
			for (int i = 0; i < bounds.height - 2; i++)
			{
				gcBuffer.setForeground(colors[i % 4]);
				gcBuffer.drawLine(1, i + 1, bounds.width - 1, i + 1);
			}

			gcBuffer.setForeground(Colors.black);
			gcBuffer.drawLine(bounds.width - 70, 0, bounds.width - 70, bounds.height - 1);
			gcBuffer.drawRectangle(0, 0, bounds.width - 1, bounds.height - 1);
			gcBuffer.dispose();
		}
	}

	public void dispose()
	{
		if (bufferBackground != null && !bufferBackground.isDisposed())
			bufferBackground.dispose();
	}

	public void setColors(Color color1, Color color2, Color color3)
	{
		colorWhite = color1;
		lightGrey = color2;
		lightGrey2 = color3;
		drawCanvas.redraw();
	}
}