Java Reference
In-Depth Information
The specifics of the
findColorLabel(Object label)
and
findColorPosition(Color newColor)
methods are shown in the complete source in Listing 9-11, coming up shortly.
If you don't use the
showDialog()
means of showing the chooser pop-up window, once the
chooser panel has been defined, and you've created a chooser panel, it can be placed within a
JColorChooser
with
addChooserPanel()
.
AbstractColorChooserPanel newChooser = new SystemColorChooserPanel();
colorChooser.addChooserPanel(newChooser);
After showing the
JColorChooser
and picking the appropriate tab, your new chooser will
be available for use, as shown in Figure 9-24.
Figure 9-24.
After adding the new SystemColor chooser panel
The complete source for the
SystemColorChooserPanel
is shown in Listing 9-11. The program
should use the
ComboBoxModel
to store the
labels
and
colors
arrays of the example in one data
model. However, the complexities of using the MVC capabilities of the
JComboBox
will be saved
for Chapter 13. Feel free to change the example in order to use the appropriate data model for
the
JComboBox
or some of the other Collections API classes available.
Listing 9-11.
Custom AbstractColorChooserPanel
import javax.swing.*;
import javax.swing.colorchooser.*;
import java.awt.*;
import java.awt.event.*;
public class SystemColorChooserPanel
extends AbstractColorChooserPanel
implements ItemListener {
