Palettes.java Source code

Introduction

Here is the source code for Palettes.java

Source

/*******************************************************************************
 * All Right Reserved. Copyright (c) 1998, 2004 Jackwind Li Guojie
 * 
 * Created on 2004-4-21 20:12:55 by JACK $Id$
 *  
 ******************************************************************************/
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class Palettes {
    Display display = new Display();
    Shell shell = new Shell(display);

    public Palettes() {
        shell.setLayout(new FillLayout());

        PaletteData paletteData = new PaletteData(0xFF0000, 0x00FF00, 0x0000FF);
        ImageData imageData = new ImageData(100, 100, 24, paletteData);

        for (int i = 0; i < 100; i++) { // each column.
            for (int j = 0; j < 100; j++) { // each row.
                if (j < 30 || (i > 35 && i < 65))
                    imageData.setPixel(i, j, 0xFF);
                else
                    imageData.setPixel(i, j, 0xFFFF00);
            }
        }

        //      int pixelValue = imageData.getPixel(50, 50);
        //      int redComponent = pixelValue & imageData.palette.redMask;
        //      int greenComponent = pixelValue & imageData.palette.greenMask;
        //      int blueComponent = pixelValue & imageData.palette.blueMask;

        PaletteData paletteData2 = new PaletteData(new RGB[] { new RGB(0, 0, 255), // blue
                new RGB(255, 255, 0) // yellow
        });

        ImageData imageData2 = new ImageData(100, 100, 1, paletteData2);
        for (int i = 0; i < 100; i++) { // each column.
            for (int j = 0; j < 100; j++) { // each row.
                if (j < 30 || (i > 35 && i < 65))
                    imageData2.setPixel(i, j, 0);
                else
                    imageData2.setPixel(i, j, 1);
            }
        }

        System.out.println(imageData.palette.getRGB(imageData.getPixel(50, 50)));

        final Image image2 = new Image(display, imageData2);

        final Image image = new Image(display, imageData);

        final Canvas canvas = new Canvas(shell, SWT.NULL);
        canvas.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
        canvas.addPaintListener(new PaintListener() {
            public void paintControl(PaintEvent e) {
                e.gc.drawImage(image2, 0, 0);
            }
        });

        shell.pack();
        shell.open();
        //textUser.forceFocus();

        // Set up the event loop.
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                // If no more entries in event queue
                display.sleep();
            }
        }

        display.dispose();
    }

    private void init() {

    }

    public static void main(String[] args) {
        new Palettes();
    }
}