/**
* 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;
}
/**
* Invokes supers implementation to uninstall any of its state. This will also reset the <code>
* LayoutManager</code> of the <code>JRootPane</code>. If a <code>Component</code> has been added
* to the <code>JRootPane</code> to render the window decoration style, this method will remove
* it. Similarly, this will revert the Border and LayoutManager of the <code>JRootPane</code> to
* what it was before <code>installUI</code> was invoked.
*
* @param c the JRootPane to uninstall state from
*/
public void uninstallUI(JComponent c) {
super.uninstallUI(c);
uninstallClientDecorations(root);
layoutManager = null;
mouseInputListener = null;
root = null;
}
/**
* Invokes supers implementation of <code>installUI</code> to install the necessary state onto the
* passed in <code>JRootPane</code> to render the metal look and feel implementation of <code>
* RootPaneUI</code>. If the <code>windowDecorationStyle</code> property of the <code>JRootPane
* </code> is other than <code>JRootPane.NONE</code>, this will add a custom <code>Component
* </code> to render the widgets to <code>JRootPane</code>, as well as installing a custom <code>
* Border</code> and <code>LayoutManager</code> on the <code>JRootPane</code>.
*
* @param c the JRootPane to install state onto
*/
public void installUI(JComponent c) {
super.installUI(c);
root = (JRootPane) c;
int style = root.getWindowDecorationStyle();
if (style != JRootPane.NONE) {
installClientDecorations(root);
}
}