Add Traverse event to Canvas : Canvas « SWT « Java Tutorial

1. Java Tutorial
2. SWT
3. Canvas

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class CanvasTranverseEvent {

  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    
    final Canvas c = new Canvas(shell, SWT.BORDER);
    c.setBounds(10, 50, 100, 32);
    c.addListener(SWT.Traverse, new Listener() {
      public void handleEvent(Event e) {
        switch (e.detail) {
        /* Do tab group traversal */
        case SWT.TRAVERSE_ESCAPE:
          System.out.println("SWT.TRAVERSE_ESCAPE");
          break;
        case SWT.TRAVERSE_RETURN:
        case SWT.TRAVERSE_TAB_NEXT:
          System.out.println("SWT.TRAVERSE_TAB_NEXT");
          break;
        case SWT.TRAVERSE_TAB_PREVIOUS:
        case SWT.TRAVERSE_PAGE_NEXT:
        case SWT.TRAVERSE_PAGE_PREVIOUS:
          e.doit = true;
          break;
        }
      }
    });

    Text t = new Text(shell, SWT.SINGLE | SWT.BORDER);
    t.setBounds(10, 85, 100, 32);

    c.setFocus();
    shell.setSize(200, 200);
    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