These two lines can be placed on the 'execute' method of an Action, or the 'widgedSelected' method of a SelectionListener.

new Thread( new MyRunnable( "RUN_A", true ), "A" ).start(); //$NON-NLS-1$ //$NON-NLS-2$
new Thread( new MyRunnable( "RUN_B", false ), "B" ).start(); //$NON-NLS-1$ //$NON-NLS-2$



This class can be used as an inner class within the same file where the two lines above where used.

private static class MyRunnable implements Runnable {

		private String name;
		private boolean singleColor;

		public MyRunnable( String name, boolean singleColor ) {
			this.name = name;
			this.singleColor = singleColor;
		}

		@Override
		public void run() {
			Color colorA = null;
			Color colorB = null;

			if ( singleColor ) {
				colorA = new Color( Display.findDisplay( Thread.currentThread() ), 255, 0, 128 );
			} else {
				colorA = new Color( Display.findDisplay( Thread.currentThread() ), 193, 98, 107 );
				colorB = new Color( Display.findDisplay( Thread.currentThread() ), 146, 190, 137 );
			}

			Display display = new Display();
			Image image = new Image( display, 1000, 1000 );
			GC gc = new GC( image );

			int items = 20;

			for ( int i = 0; i < items; i++ ) {
				for ( int j = 0; j < items; j++ ) {
					int x = i * ( 1000 / items ) + ( 1000 / items / 4 );
					int y = j * ( 1000 / items ) + ( 1000 / items / 4 );

					gc.setAntialias( (int) ( Math.random() * 2 ) );

					Color bg;

					if ( singleColor ) {
						bg = colorA;
					} else {
						if ( ( i + j ) % 2 == 1 ) {
							bg = colorA;
						} else {
							bg = colorB;
						}
					}

					gc.setBackground( bg );
					gc.fillRectangle( x, y, 1000 / items / 2, 1000 / items / 2 );
				}
			}

			ImageLoader imageLoader = new ImageLoader();
			imageLoader.data = new ImageData[] { image.getImageData() };
			imageLoader.save( "C:\\img\\" + name + ".png", SWT.IMAGE_PNG ); //$NON-NLS-1$ //$NON-NLS-2$

			gc.dispose();
			image.dispose();
			display.dispose();

			colorA.dispose();

			if ( colorB != null ) {
				colorB.dispose();
			}
		}
	}