/*
* Create using the specified focus policy
*/
public TabFocusHandler(JTabbedPane tabbedPane, int focusPolicy) {
if (focusPolicy != RESET_FOCUS && focusPolicy != RETAIN_FOCUS)
throw new IllegalArgumentException("Invalid focus policy");
this.tabbedPane = tabbedPane;
this.focusPolicy = focusPolicy;
// Add listeners to manage a tab change
tabbedPane.addChangeListener(this);
KeyboardFocusManager focusManager = KeyboardFocusManager.getCurrentKeyboardFocusManager();
focusManager.addPropertyChangeListener("permanentFocusOwner", this);
}
/*
* The method maps the list of the active windows to the window's AppContext,
* then the method registers ActiveWindowListener, GuiDisposedListener listeners;
* it executes the initilialization only once per AppContext.
*/
@SuppressWarnings("unchecked")
private static void initActiveWindowsTracking(Window w) {
AppContext appContext = AppContext.getAppContext();
synchronized (appContext) {
List<WWindowPeer> l = (List<WWindowPeer>) appContext.get(ACTIVE_WINDOWS_KEY);
if (l == null) {
l = new LinkedList<WWindowPeer>();
appContext.put(ACTIVE_WINDOWS_KEY, l);
appContext.addPropertyChangeListener(AppContext.GUI_DISPOSED, guiDisposedListener);
KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager();
kfm.addPropertyChangeListener("activeWindow", activeWindowListener);
}
}
}