Repaint Canvas : Canvas « SWT « Java Tutorial

1. Java Tutorial
2. SWT
3. Canvas

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
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 CanvasRepaint {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Canvas Example");
    shell.setLayout(new FillLayout());

    Canvas canvas = new Canvas(shell, SWT.NONE);

    canvas.addPaintListener(new PaintListener() {
      public void paintControl(PaintEvent e) {
        e.gc.drawRoundRectangle(10, 10, 200, 200, 30, 30);
      }
    });

    
    canvas.redraw();
    
    
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
  }
}

17.20.Canvas
	17.20.1.	Repaint Canvas
	17.20.2.	Canvas: scroll an image (flicker free, no double buffering)
	17.20.3.	Add Traverse event to Canvas
	17.20.4.	Add Controls to Canvas
	17.20.5.	Add KeyEvent to Canvas