IsFrameStateSupported(int) can be used to determine whether a particular window state is supported by a particular window manager. Note: Not all window managers/native platforms support all window states. While you can use the WindowListener methods to detect some window states, such as iconification, there are two reasons why a WindowStateListener might be preferable: it has only one method for you to implement, and it provides support for maximization. WindowStateListener has a single method to detect a change to the state of the window, such as when the window is iconified, deiconified, maximized, or restored to normal. WindowFocusListener contains methods to detect when the window becomes the focus owner or it loses the focus owner status. The other two window listener interfaces are WindowFocusListener and WindowStateListener. The WindowListener interface defines methods that handle most window events, such as the events for opening and closing the window, activation and deactivation of the window, and iconification and deiconification of the window. Maximizing the window - Increasing a window's size to the maximum allowable size, either in the vertical direction, the horizontal direction, or both directions.For more information about focus, see the Deactivated window - This window has lost the focus.Activated window (frame or dialog) - This window is either the focused window, or owns the focused window.Focused window - The window which contains the "focus owner".Deiconifying a window - Restoring the window to its original size.Iconifying a window - Reducing the window to an icon on the desktop.Closing a window - Removing the window from the screen.Opening a window - Showing a window for the first time.The following window activities or states can precede a window event:
A window is considered as a "focus owner", if this window receives keyboard input. When the appropriate listener has been registered on a window (such as aĭialog), window events are fired just after the window activity or state has occurred. The methods in all three event handlers are implemented by the abstract WindowAdapter class.
All three listeners handle WindowEvent objects.
This section explains how to implement three kinds of window-related event handlers: WindowListener, WindowFocusListener, and WindowStateListener.
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