/* (@)JColorChooserLocaleSwitchTestGUI.java */
/* Copyright 2011 Sebastian Haufe
* Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
[url]http://www.apache.org/licenses/LICENSE-2.0[/url]
* Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. */
package com.ebenius;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.util.Collection;
import java.util.LinkedList;
import java.util.Locale;
import javax.accessibility.AccessibleContext;
import javax.swing.*;
import javax.swing.colorchooser.AbstractColorChooserPanel;
/**
* That {@link JColorChooser} beast is really resistant against any wish to
* change the locale. Needs a lot of cheating, see below.
*
* @author Sebastian Haufe
*/
public class JColorChooserLocaleSwitchTestGUI {
/** Creates the GUI. Call on EDT, only! */
static void createAndShowGui() {
final JColorChooser colorChooser = new JColorChooser();
final JPanel contentPane = new JPanel(new BorderLayout(6, 6));
contentPane.add(new JButton(new AbstractAction(
"Toggle Locale (de_DE/en_US)") {
private static final long serialVersionUID = 1L;
public void actionPerformed(ActionEvent e) {
if (Locale.US.equals(colorChooser.getLocale())) {
colorChooser.setLocale(Locale.GERMANY);
} else {
colorChooser.setLocale(Locale.US);
}
System.out.println("Set locale: " + colorChooser.getLocale());
Locale.setDefault(colorChooser.getLocale());
final String oldRecentStr =
UIManager.getString("ColorChooser.swatchesRecentText");
/* 1) Buggy BasicColorChooserUI bastard! To get the tabbed pane titles
reset to now locale settings, you need to reinstall them on the
color chooser component. The AbstractColorChooserPanel instances
created by that UI implementation read their display name from the
L&F defaults; of course ignoring the locale of the components.
That's why we need to set the default locale on the L&F defaults.*/
UIManager.getLookAndFeelDefaults().setDefaultLocale(
colorChooser.getLocale());
/* 2) Buggy BasicColorChooserUI bastard! If the UI is installed on the
component while preview panel is not null, it removes the preview
panel holder, unless the preview panel has non-zero insets. If you
try to unset the preview panel (null) the UI immediately creates a
default preview panel and resets it to the component (which has
zero insets again). Basically, there are a two workarounds
possible:
a) Create a dummy panel with non-zero insets, set that panel as
preview panel, then update the UI and then set the preview panel
to null (to have it recreated, immediately).
b) Unset the UI, unset the preview panel and then update the UI.
Choice a) would possibly break other UI implementations, but b)
should be save; so we go for that one. */
colorChooser.setUI(null);
colorChooser.setPreviewPanel(null);
SwingUtilities.updateComponentTreeUI(colorChooser);
/* 3) Buggy BasicColorChooserUI bastard! The text of the "Recent"
label in the DefaultSwatchChooser is assigned to a
private static String field on class instantiation only. The
label is not accessible in any way. So we find it in the
component hierarchy by comparing the text. Of course the text is
assigned in somewhere below installUI(). So we need to do the
voodoo after updateUI()! Damn it! */
AbstractColorChooserPanel[] panels = colorChooser.getChooserPanels();
for (AbstractColorChooserPanel cp : panels) {
if ("javax.swing.colorchooser.DefaultSwatchChooserPanel".equals(cp
.getClass().getName())) {
final String recentStr =
UIManager.getString("ColorChooser.swatchesRecentText");
for (Component c : flattenChildHierarchy(cp,
new LinkedList<Component>())) {
if (c instanceof JLabel) {
final String txt = ((JLabel) c).getText();
if ((oldRecentStr == null && txt == null)
|| (oldRecentStr != null && oldRecentStr.equals(txt))) {
((JLabel) c).setText(recentStr);
}
} else if ("javax.swing.colorchooser.RecentSwatchPanel"
.equals(c)) {
((JComponent) c).putClientProperty(
AccessibleContext.ACCESSIBLE_NAME_PROPERTY, recentStr);
}
}
}
}
}
private Collection<Component> flattenChildHierarchy(
Container parent,
Collection<Component> collector) {
for (int i = 0; i < parent.getComponentCount(); i++) {
final Component c = parent.getComponent(i);
collector.add(c);
if (c instanceof Container) {
flattenChildHierarchy((Container) c, collector);
}
}
return collector;
}
}), BorderLayout.SOUTH);
contentPane.add(colorChooser);
final JFrame f =
new JFrame("Test Frame: JColorChooserLocaleSwitchTestGUI"); //$NON-NLS-1$
f.setContentPane(contentPane);
f.pack();
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.setVisible(true);
}
/** @param args ignored */
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
