/**
* Tries to load/restore the window state of the given window.
*
* @param aNamespace the namespace to use for the window state;
* @param aProperties the properties to read from;
* @param aWindow the window to load the state for.
*/
public static void loadWindowState(final Preferences aProperties, final Window aWindow) {
// Special case: for FileDialog/JFileChooser we also should restore the
// properties...
loadFileDialogState(aProperties, aWindow);
try {
final int xPos = aProperties.getInt("winXpos", -1);
final int yPos = aProperties.getInt("winYpos", -1);
if ((xPos >= 0) && (yPos >= 0)) {
aWindow.setLocation(xPos, yPos);
}
} catch (NumberFormatException exception) {
// Ignore...
}
if (isNonResizableWindow(aWindow)) {
// In case the window cannot be resized, don't restore its width &
// height...
return;
}
try {
final int width = aProperties.getInt("winWidth", -1);
final int height = aProperties.getInt("winHeight", -1);
if ((width >= 0) && (height >= 0)) {
aWindow.setSize(width, height);
}
} catch (NumberFormatException exception) {
// Ignore...
}
}
/**
* Returns whether the given component is "actively" shown in screen, that is, it or any of its
* ancestors is focused.
*
* @param aComponent the component to determine whether it is actively shown on screen, may be
* <code>null</code>.
* @return <code>true</code> if the given component is actively shown, <code>false</code>
* otherwise.
*/
public static final boolean isActivelyShown(final Component aComponent) {
final KeyboardFocusManager kbdFocusManager =
KeyboardFocusManager.getCurrentKeyboardFocusManager();
final Window owner = kbdFocusManager.getFocusedWindow();
return ((aComponent != null)
&& (owner != null)
&& ((owner == aComponent) || owner.isAncestorOf(aComponent)));
}
/**
* Saves the window state to the given properties map.
*
* @param aNamespace the namespace to use for the window state;
* @param aProperties the properties to fill;
* @param aWindow the window to save the state for.
*/
public static void saveWindowState(final Preferences aProperties, final Window aWindow) {
// Special case: for FileDialog/JFileChooser we also store the properties...
saveFileDialogState(aProperties, aWindow);
final Point location = aWindow.getLocation();
aProperties.put("winXpos", Integer.toString(location.x));
aProperties.put("winYpos", Integer.toString(location.y));
if (isNonResizableWindow(aWindow)) {
// In case the window cannot be resized, don't restore its width &
// height...
return;
}
final Dimension dims = aWindow.getSize();
aProperties.put("winWidth", Integer.toString(dims.width));
aProperties.put("winHeight", Integer.toString(dims.height));
}