MouseDown.java

   1 package org.argeo.cms.swt;
   2
   3 import org.eclipse.swt.events.MouseEvent;
   4 import org.eclipse.swt.events.MouseListener;
   5
   6 /**
   7  * {@link MouseListener#mouseDown(MouseEvent)} as a functional interface in
   8  * order to use as a short lambda expression in UI code.
   9  * {@link MouseListener#mouseDoubleClick(MouseEvent)} and
  10  * {@link MouseListener#mouseUp(MouseEvent)} do nothing by default.
  11  */
  12 @FunctionalInterface
  13 public interface MouseDown extends MouseListener {
  14         @Override
  15         void mouseDown(MouseEvent e);
  16
  17         @Override
  18         default void mouseDoubleClick(MouseEvent e) {
  19                 // does nothing
  20         }
  21
  22         @Override
  23         default void mouseUp(MouseEvent e) {
  24                 // does nothing
  25         }
  26 }