A panel with buttons to pop up three types of color choosers
/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/**
* @version 1.03 2007-06-12
* @author Cay Horstmann
*/
public class ColorChooserTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
ColorChooserFrame frame = new ColorChooserFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
/**
* A frame with a color chooser panel
*/
class ColorChooserFrame extends JFrame
{
public ColorChooserFrame()
{
setTitle("ColorChooserTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
// add color chooser panel to frame
ColorChooserPanel panel = new ColorChooserPanel();
add(panel);
}
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;
}
/**
* A panel with buttons to pop up three types of color choosers
*/
class ColorChooserPanel extends JPanel
{
public ColorChooserPanel()
{
JButton modalButton = new JButton("Modal");
modalButton.addActionListener(new ModalListener());
add(modalButton);
JButton modelessButton = new JButton("Modeless");
modelessButton.addActionListener(new ModelessListener());
add(modelessButton);
JButton immediateButton = new JButton("Immediate");
immediateButton.addActionListener(new ImmediateListener());
add(immediateButton);
}
/**
* This listener pops up a modal color chooser
*/
private class ModalListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
Color defaultColor = getBackground();
Color selected = JColorChooser.showDialog(ColorChooserPanel.this, "Set background",
defaultColor);
if (selected != null) setBackground(selected);
}
}
/**
* This listener pops up a modeless color chooser. The panel color is changed when the user
* clicks the Ok button.
*/
private class ModelessListener implements ActionListener
{
public ModelessListener()
{
chooser = new JColorChooser();
dialog = JColorChooser.createDialog(ColorChooserPanel.this, "Background Color",
false /* not modal */, chooser, new ActionListener() // OK
// button
// listener
{
public void actionPerformed(ActionEvent event)
{
setBackground(chooser.getColor());
}
}, null /* no Cancel button listener */);
}
public void actionPerformed(ActionEvent event)
{
chooser.setColor(getBackground());
dialog.setVisible(true);
}
private JDialog dialog;
private JColorChooser chooser;
}
/**
* This listener pops up a modeless color chooser. The panel color is changed immediately when
* the user picks a new color.
*/
private class ImmediateListener implements ActionListener
{
public ImmediateListener()
{
chooser = new JColorChooser();
chooser.getSelectionModel().addChangeListener(new ChangeListener()
{
public void stateChanged(ChangeEvent event)
{
setBackground(chooser.getColor());
}
});
dialog = new JDialog((Frame) null, false /* not modal */);
dialog.add(chooser);
dialog.pack();
}
public void actionPerformed(ActionEvent event)
{
chooser.setColor(getBackground());
dialog.setVisible(true);
}
private JDialog dialog;
private JColorChooser chooser;
}
}
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