/**
* 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...
}
}
/**
* 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));
}
/**
* Checks whether the given window is either a FileDialog, or contains a JFileChooser component.
* If so, its current directory is restored from the given properties.
*
* @param aNamespace the name space to use;
* @param aProperties the properties to get the directory from;
* @param aWindow the window to check for.
*/
private static void saveFileDialogState(final Preferences aProperties, final Window aWindow) {
final String propKey = "lastDirectory";
if (aWindow instanceof FileDialog) {
final String dir = ((FileDialog) aWindow).getDirectory();
if (dir != null) {
aProperties.put(propKey, dir);
}
} else if (aWindow instanceof JDialog) {
final Container contentPane = ((JDialog) aWindow).getContentPane();
final JFileChooser fileChooser =
(JFileChooser) findComponent(contentPane, JFileChooser.class);
if (fileChooser != null) {
final File dir = fileChooser.getCurrentDirectory();
if (dir != null) {
aProperties.put(propKey, dir.getAbsolutePath());
}
}
}
}
/**
* Checks whether the given window is either a FileDialog, or contains a JFileChooser component.
* If so, its current directory is stored in the given properties.
*
* @param aNamespace the name space to use;
* @param aProperties the properties to store the found directory in;
* @param aWindow the window to check for.
*/
private static void loadFileDialogState(final Preferences aProperties, final Window aWindow) {
final String propKey = "lastDirectory";
if (aWindow instanceof FileDialog) {
final String dir = aProperties.get(propKey, null);
if (dir != null) {
((FileDialog) aWindow).setDirectory(dir);
}
} else if (aWindow instanceof JDialog) {
final Container contentPane = ((JDialog) aWindow).getContentPane();
final JFileChooser fileChooser =
(JFileChooser) findComponent(contentPane, JFileChooser.class);
if (fileChooser != null) {
final String dir = aProperties.get(propKey, null);
if (dir != null) {
fileChooser.setCurrentDirectory(new File(dir));
}
}
}
}