/**
* Invoked when a property changes. <code>MetalRootPaneUI</code> is primarily interested in events
* originating from the <code>JRootPane</code> it has been installed on identifying the property
* <code>windowDecorationStyle</code>. If the <code>windowDecorationStyle</code> has changed to a
* value other than <code>JRootPane.NONE</code>, this will add a <code>Component</code> to the
* <code>JRootPane</code> to render the window decorations, as well as installing a <code>Border
* </code> on the <code>JRootPane</code>. On the other hand, if the <code>windowDecorationStyle
* </code> has changed to <code>JRootPane.NONE</code>, this will remove the <code>Component</code>
* that has been added to the <code>JRootPane</code> as well resetting the Border to what it was
* before <code>installUI</code> was invoked.
*
* @param e A PropertyChangeEvent object describing the event source and the property that has
* changed.
*/
public void propertyChange(PropertyChangeEvent e) {
super.propertyChange(e);
String propertyName = e.getPropertyName();
if (propertyName == null) {
return;
}
if (propertyName.equals("windowDecorationStyle")) {
JRootPane root = (JRootPane) e.getSource();
int style = root.getWindowDecorationStyle();
// This is potentially more than needs to be done,
// but it rarely happens and makes the install/uninstall process
// simpler. MetalTitlePane also assumes it will be recreated if
// the decoration style changes.
uninstallClientDecorations(root);
if (style != JRootPane.NONE) {
installClientDecorations(root);
}
} else if (propertyName.equals("ancestor")) {
uninstallWindowListeners(root);
if (((JRootPane) e.getSource()).getWindowDecorationStyle() != JRootPane.NONE) {
installWindowListeners(root, root.getParent());
}
}
return;
}
/**
* Installs the necessary state onto the JRootPane to render client decorations. This is ONLY
* invoked if the <code>JRootPane</code> has a decoration style other than <code>JRootPane.NONE
* </code>.
*/
private void installClientDecorations(JRootPane root) {
installBorder(root);
JComponent titlePane = createTitlePane(root);
setTitlePane(root, titlePane);
installWindowListeners(root, root.getParent());
installLayout(root);
if (window != null) {
root.revalidate();
root.repaint();
}
}