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Add Mouse Down, Up and Move event

import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; public class MouseEventDownUpMove {   public static void main(String[] args) {     Display display = new Display();     final Shell shell = new Shell(display);     Listener listener = new Listener() {       public void handleEvent(Event event) {         switch (event.type) {         case SWT.MouseDown:           System.out.println("down:" + event);           break;         case SWT.MouseMove:           System.out.println("move:"+event);           break;         case SWT.MouseUp:           System.out.println("Up:"+event);           break;         }       }     };     shell.addListener(SWT.MouseDown, listener);     shell.addListener(SWT.MouseUp, listener);     shell.addListener(SWT.MouseMove, listener);     shell.setSize(300, 300);     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch())         display.sleep();     }     display.dispose();   } }