How to use

getAncestorWindow

method

in

de.schlichtherle.truezip.swing.EnhancedPanel

/**
 * Returns the ancestor {@link Window} of this {@code Panel} or
 * {@code null} if the component is not (yet) placed in a
 * {@code Window}.
 */
public @Nullable Window getAncestorWindow() {
  return getAncestorWindow(this);
}

final Window window = evt.getSource().getAncestorWindow();
window.addWindowFocusListener(new WindowFocusListener() {
  @Override

final Window window = evt.getSource().getAncestorWindow();
window.addWindowFocusListener(new WindowFocusListener() {
  @Override

final Window window = evt.getSource().getAncestorWindow();
window.addWindowFocusListener(new WindowFocusListener() {
  @Override

  @Override
  public void hierarchyChanged(final HierarchyEvent e) {
    if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED)
        != HierarchyEvent.SHOWING_CHANGED)
      return;
    final Window window = getAncestorWindow();
    assert null != window : "A showing panel must have a containing window!";
    final boolean windowShown = window.isShowing();
    if (windowShown != isShowing())
      return;
    processPanelEvent(new PanelEvent(EnhancedPanel.this,
        windowShown
          ? PanelEvent.ANCESTOR_WINDOW_SHOWN
          : PanelEvent.ANCESTOR_WINDOW_HIDDEN));
  }
} // class EnhancedPanelHierarchyListener

@Test
public void testGetAncestorWindow() throws InterruptedException {
  assertNull(instance.getAncestorWindow());
  JFrameOperator frame = showFrameWith(instance);
  Window window1 = instance.getAncestorWindow();
  assertSame(frame.getSource(), window1);
  frame.dispose();
  frame = showFrameWith(instance); // change enclosing frame
  Window window2 = instance.getAncestorWindow();
  assertSame(frame.getSource(), window2);
  frame.dispose();
  assertNotSame(window1, window2);
}