Class WindowUtils

Method Details

• makeWindowNonOpaque

  public static void makeWindowNonOpaque(Window window)

  Try's to make the given Window non-opqaue (transparent) across platforms and JREs. This method is not guaranteed to succeed, and will fail silently if the given Window cannot be made non-opaque.

  This method is useful, for example, when creating a HUD style window that is semi-transparent, and thus doesn't want the window background to be drawn.

  Parameters:

  window - the Window to make non-opaque.

• createAndInstallRepaintWindowFocusListener

  @Deprecated public static WindowFocusListener createAndInstallRepaintWindowFocusListener(Window window)

  Deprecated.

  use the more targeted installJComponentRepainterOnWindowFocusChanged(JComponent) method.

  Creates and installs a WindowFocusListener on the given Window which calls the Window's repaint() method on focus state changes.

  Parameters:

  window - the Window to repaint on focus state changes.

  Returns:

  the listener installed.

• isParentWindowFocused

  public static boolean isParentWindowFocused(Component component)

  true if the given Component's has a parent Window (i.e. it's not null) and that Window is currently active (focused).

  Parameters:

  component - the Component to check the parent Window's focus for.

  Returns:

  true if the given Component's parent Window is currently active.

• installWeakWindowFocusListener

  public static void installWeakWindowFocusListener(JComponent component, WindowFocusListener focusListener)

  Installs a WindowFocusListener on the given JComponent's parent Window. If the JComponent doesn't yet have a parent, then the listener will be installed when the component is added to a container.

  Parameters:

  component - the component who's parent frame to listen to focus changes on.

  focusListener - the WindowFocusListener to notify when focus changes.

• installJComponentRepainterOnWindowFocusChanged

  public static void installJComponentRepainterOnWindowFocusChanged(JComponent component)

  Installs a listener on the given JComponent's parent Window that repaints the given component when the parent window's focused state changes. If the given component does not have a parent at the time this method is called, then an ancestor listener will be installed that installs a window listener when the components parent changes.

  Parameters:

  component - the JComponent to add the repaint focus listener to.