Source Code : Palettes

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Palettes

 

/*******************************************************************************
 * 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();
  }
}


           
         
  

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