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//: swt/ColorBoxes.java

package TIJ4_code.swt;

// SWT translation of Swing ColorBoxes.java.

import TIJ4_code.swt.util.*;

import org.eclipse.swt.*;

import org.eclipse.swt.widgets.*;

import org.eclipse.swt.events.*;

import org.eclipse.swt.graphics.*;

import org.eclipse.swt.layout.*;

import java.awt.*;

import java.awt.event.*;

import java.util.concurrent.*;

import java.util.*;

import TIJ4_code.net.mindview.util.*;

class CBox extends Canvas implements Runnable {

class CBoxPaintListener implements PaintListener {

public void paintControl(PaintEvent e) {

Color color = new Color(e.PAINT_FIRST, cColor);

e.gc.setBackground(color);

Point size = getSize();

e.gc.fillRectangle(0, 0, size.x, size.y);

color.dispose();

}

}

private static Random rand = new Random();

private static RGB newColor() {

return new RGB(rand.nextInt(255),

rand.nextInt(255), rand.nextInt(255));

}

private int pause;

private RGB cColor = newColor();

public CBox(Composite parent, int pause) {

super(parent, SWT.NONE);

this.pause = pause;

addPaintListener(new CBoxPaintListener());

}

public void run() {

try {

while(!Thread.interrupted()) {

cColor = newColor();

getDisplay().asyncExec(new Runnable() {

public void run() {

try { redraw(); } catch(SWTException e) {}

// SWTException is OK when the parent

// is terminated from under us.

}

});

TimeUnit.MILLISECONDS.sleep(pause);

}

} catch(InterruptedException e) {

// Acceptable way to exit

} catch(SWTException e) {

// Acceptable way to exit: our parent

// was terminated from under us.

}

}

}

public class ColorBoxes implements SWTApplication {

private int grid = 12;

private int pause = 50;

public void createContents(Composite parent) {

GridLayout gridLayout = new GridLayout(grid, true);

gridLayout.horizontalSpacing = 0;

gridLayout.verticalSpacing = 0;

parent.setLayout(gridLayout);

ExecutorService exec = new DaemonThreadPoolExecutor();

for(int i = 0; i < (grid * grid); i++) {

final CBox cb = new CBox(parent, pause);

cb.setLayoutData(new GridData(GridData.FILL_BOTH));

exec.execute(cb);

}

}

public static void main(String[] args) {

ColorBoxes boxes = new ColorBoxes();

if(args.length > 0)

boxes.grid = new Integer(args[0]);

if(args.length > 1)

boxes.pause = new Integer(args[1]);

SWTConsole.run(boxes, 500, 400);

}

} ///:~