/**
* Displays the popup menu at the position x,y in the coordinate space of the component invoker.
*
* @param invoker the component in whose space the popup menu is to appear
* @param x the x coordinate in invoker's coordinate space at which the popup menu is to be
* displayed
* @param y the y coordinate in invoker's coordinate space at which the popup menu is to be
* displayed
*/
public void show(Component invoker, int x, int y) {
if (DEBUG) {
System.out.println("in JPopupMenu.show ");
}
setInvoker(invoker);
Frame newFrame = getFrame(invoker);
if (newFrame != frame) {
// Use the invoker's frame so that events
// are propagated properly
if (newFrame != null) {
this.frame = newFrame;
if (popup != null) {
setVisible(false);
}
}
}
Point invokerOrigin;
if (invoker != null) {
invokerOrigin = invoker.getLocationOnScreen();
// To avoid integer overflow
long lx, ly;
lx = ((long) invokerOrigin.x) + ((long) x);
ly = ((long) invokerOrigin.y) + ((long) y);
if (lx > Integer.MAX_VALUE) lx = Integer.MAX_VALUE;
if (lx < Integer.MIN_VALUE) lx = Integer.MIN_VALUE;
if (ly > Integer.MAX_VALUE) ly = Integer.MAX_VALUE;
if (ly < Integer.MIN_VALUE) ly = Integer.MIN_VALUE;
setLocation((int) lx, (int) ly);
} else {
setLocation(x, y);
}
setVisible(true);
}
@Override
public Dimension getPreferredSize() {
final Component focusOwner =
KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
Point p = null;
if (focusOwner != null && focusOwner.isShowing()) {
p = focusOwner.getLocationOnScreen();
}
return computeNotBiggerDimension(super.getPreferredSize().getSize(), p);
}
