/**
* 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);
}
protected void customizePopup(BasicComboPopup popup) {
scrollPane = getScrollPane(popup);
if (popupWider) popupWider(popup);
checkHorizontalScrollBar(popup);
// For some reason in JDK7 the popup will not display at its preferred
// width unless its location has been changed from its default
// (ie. for normal "pop down" shift the popup and reset)
Component comboBox = popup.getInvoker();
Point location = comboBox.getLocationOnScreen();
if (popupAbove) {
int height = popup.getPreferredSize().height;
popup.setLocation(location.x, location.y - height);
} else {
int height = comboBox.getPreferredSize().height;
popup.setLocation(location.x, location.y + height - 1);
popup.setLocation(location.x, location.y + height);
}
}