@Override
public void mouseMoved(MouseEvent e) {
final MouseEvent event = SwingUtilities.convertMouseEvent(e.getComponent(), e, getParent());
final boolean insideRec = getBounds().contains(event.getPoint());
boolean buttonsNotPressed =
(e.getModifiersEx()
& (InputEvent.BUTTON1_DOWN_MASK
| InputEvent.BUTTON2_DOWN_MASK
| InputEvent.BUTTON3_DOWN_MASK))
== 0;
if (!myPopupIsShowing && insideRec && buttonsNotPressed) {
showPopup(null, false);
} else if (myPopupIsShowing && !insideRec) {
final Component over =
SwingUtilities.getDeepestComponentAt(e.getComponent(), e.getX(), e.getY());
JPopupMenu popup = myUnderPopup.isShowing() ? myUnderPopup : myAbovePopup;
if (over != null && popup.isShowing()) {
final Rectangle rec = new Rectangle(popup.getLocationOnScreen(), popup.getSize());
int delta = 15;
rec.x -= delta;
rec.width += delta * 2;
rec.y -= delta;
rec.height += delta * 2;
final Point eventPoint = e.getPoint();
SwingUtilities.convertPointToScreen(eventPoint, e.getComponent());
if (rec.contains(eventPoint)) {
return;
}
}
closePopup();
}
}
public static void main(String... args) throws Exception {
Robot robot = new Robot();
SwingUtilities.invokeAndWait(
new Runnable() {
public void run() {
popup = new JPopupMenu();
popup.add(new JMenuItem("item"));
popup.setVisible(true);
}
});
robot.waitForIdle();
if (!popup.isShowing()) {
throw new RuntimeException("Where is my popup ?");
}
SwingUtilities.invokeAndWait(
new Runnable() {
public void run() {
popup.setVisible(false);
popup.removeAll();
popup.setVisible(true);
}
});
robot.waitForIdle();
if (popup.isShowing()) {
throw new RuntimeException("Empty popup is shown");
}
popup.setVisible(false);
}