/**
* Returns the Point where Windows should be centered. It is recommended that centered Windows be
* checked to ensure they fit within the available display area using getMaximumWindowBounds().
*
* @return the point where Windows should be centered
* @exception HeadlessException if isHeadless() returns true
* @see #getMaximumWindowBounds
* @since 1.4
*/
public Point getCenterPoint() throws HeadlessException {
// Default implementation: return the center of the usable bounds of the
// default screen device.
Rectangle usableBounds = SunGraphicsEnvironment.getUsableBounds(getDefaultScreenDevice());
return new Point(
(usableBounds.width / 2) + usableBounds.x, (usableBounds.height / 2) + usableBounds.y);
}
private void deactivateDisplayListener() {
final GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
((SunGraphicsEnvironment) ge).removeDisplayChangedListener(this);
}
/**
* Returns the maximum bounds for centered Windows. These bounds account for objects in the native
* windowing system such as task bars and menu bars. The returned bounds will reside on a single
* display with one exception: on multi-screen systems where Windows should be centered across all
* displays, this method returns the bounds of the entire display area.
*
* <p>To get the usable bounds of a single display, use <code>GraphicsConfiguration.getBounds()
* </code> and <code>Toolkit.getScreenInsets()</code>.
*
* @return the maximum bounds for centered Windows
* @exception HeadlessException if isHeadless() returns true
* @see #getCenterPoint
* @see GraphicsConfiguration#getBounds
* @see Toolkit#getScreenInsets
* @since 1.4
*/
public Rectangle getMaximumWindowBounds() throws HeadlessException {
// Default implementation: return the usable bounds of the default screen
// device. This is correct for Microsoft Windows and non-Xinerama X11.
return SunGraphicsEnvironment.getUsableBounds(getDefaultScreenDevice());
}