/**
* Returns the corner that contains the point <code>x</code>, <code>y</code>, or -1 if the
* position doesn't match a corner.
*/
private int calculateCorner(Window w, int x, int y) {
Insets insets = w.getInsets();
int xPosition = calculatePosition(x - insets.left, w.getWidth() - insets.left - insets.right);
int yPosition = calculatePosition(y - insets.top, w.getHeight() - insets.top - insets.bottom);
if (xPosition == -1 || yPosition == -1) {
return -1;
}
return yPosition * 5 + xPosition;
}
