Cursor: create a cursor from a source and a mask


/*
 * Cursor example snippet: create a cursor from a source and a mask
 *
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.graphics.GC;
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.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class Snippet92 {

public static void main (String [] args) {
  Display display = new Display();
  Color white = display.getSystemColor (SWT.COLOR_WHITE);
  Color black = display.getSystemColor (SWT.COLOR_BLACK);
  
  //Create a source ImageData of depth 1 (monochrome)
  PaletteData palette = new PaletteData (new RGB [] {white.getRGB(), black.getRGB(),});
  ImageData sourceData = new ImageData (20, 20, 1, palette);
  for (int i = 0; i < 10; i ++) {
    for (int j = 0; j < 20; j++) {
      sourceData.setPixel(i, j, 1);
    }
  }
  
  //Create a mask ImageData of depth 1 (monochrome)
  palette = new PaletteData (new RGB [] {white.getRGB(), black.getRGB(),});
  ImageData maskData = new ImageData (20, 20, 1, palette);
  for (int i = 0; i < 20; i ++) {
    for (int j = 0; j < 10; j++) {
      maskData.setPixel(i, j, 1);
    }
  }
  //Create cursor
  Cursor cursor = new Cursor(display, sourceData, maskData, 10, 10);
  
  Shell shell = new Shell(display);
  final Image source = new Image (display,sourceData);
  final Image mask = new Image (display, maskData);
  //Draw source and mask just to show what they look like
  shell.addPaintListener(new PaintListener() {
    public void paintControl(PaintEvent e) {
      GC gc = e.gc;
      gc.drawString("source: ", 10, 10);
      gc.drawImage(source, 0, 0, 20, 20, 50, 10, 20, 20);
      gc.drawString("mask: ",10, 40);
      gc.drawImage(mask, 0, 0, 20, 20, 50, 40, 20, 20);
    }
  });
  shell.setSize(150, 150);
  shell.open();
  shell.setCursor(cursor);
  
  while (!shell.isDisposed()) {
    if (!display.readAndDispatch())
      display.sleep();
  }
  cursor.dispose();
  source.dispose();
  mask.dispose();
  display.dispose();
}
}

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Cursor: create a cursor from a source and a mask : Cursor « SWT JFace Eclipse « Java

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