Add addPaintListener to Composite : SWT Event « SWT « Java Tutorial

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Java Tutorial » SWT » SWT Event 
17. 89. 14. Add addPaintListener to Composite
Add addPaintListener to Composite
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.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class CompositePaintListener {
  
public static void main (String [] args) {
  Display display = new Display ();
  final Shell shell = new Shell (display, SWT.SHELL_TRIM | SWT.H_SCROLL | SWT.V_SCROLL);

  final Composite composite = new Composite (shell, SWT.BORDER);
  composite.setSize (700600);

  final Color red = display.getSystemColor (SWT.COLOR_RED);
  composite.addPaintListener (new PaintListener() {
    public void paintControl (PaintEvent e) {
      e.gc.setBackground (red);
      e.gc.fillOval (55690590);
    }
  });

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

}
17. 89. SWT Event
17. 89. 1. Events
17. 89. 2. The Event ModelThe Event Model
17. 89. 3. The listener notification processThe listener notification process
17. 89. 4. SWT provides two kinds of event listening mechanism: typed and untyped.SWT provides two kinds of event listening mechanism: typed and untyped.
17. 89. 5. Untyped Events and Untyped Event ListenersUntyped Events and Untyped Event Listeners
17. 89. 6. Introducing Untyped Listeners
17. 89. 7. Get event typeGet event type
17. 89. 8. implements general Event Listenerimplements general Event Listener
17. 89. 9. Introducing Typed Listeners
17. 89. 10. Typed Listeners
17. 89. 11. SWT Message Keys and Values
17. 89. 12. Using SelectionListenerUsing SelectionListener
17. 89. 13. Add Resize listener to ShellAdd Resize listener to Shell
17. 89. 14. Add addPaintListener to CompositeAdd addPaintListener to Composite
17. 89. 15. Add default selection listener to ComboAdd default selection listener to Combo
17. 89. 16. Using HelpListenerUsing HelpListener
17. 89. 17. Demonstrate DisposeListener which is notified on the associated widget's disposal
17. 89. 18. Using ControlListenerUsing ControlListener
17. 89. 19. Using FocusListenerUsing FocusListener
17. 89. 20. Using VerifyListenerUsing VerifyListener
17. 89. 21. Using ModifyListenerUsing ModifyListener
17. 89. 22. Adding AccessibleListenerAdding AccessibleListener
17. 89. 23. Adding AccessibleControlListenerAdding AccessibleControlListener
17. 89. 24. Add and remove filter listenersAdd and remove filter listeners
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