Java Reference
In-Depth Information
if (value instanceof Color) {
renderer.setBackground((Color)value);
}
renderer.setPreferredSize(preferredSize);
return renderer;
}
}
public static void main(String args[]) {
Runnable runner = new Runnable() {
public void run() {
Color colors[] = {Color.BLACK, Color.BLUE, Color.CYAN, Color.DARK_GRAY,
Color.GRAY, Color.GREEN, Color.LIGHT_GRAY, Color.MAGENTA,
Color.ORANGE, Color.PINK, Color.RED, Color.WHITE, Color.YELLOW};
JFrame frame = new JFrame("Color JComboBox");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JComboBox comboBox = new JComboBox(colors);
comboBox.setMaximumRowCount(5);
comboBox.setEditable(true);
comboBox.setRenderer(new ColorCellRenderer());
Color color = (Color)comboBox.getSelectedItem();
ComboBoxEditor editor = new ColorComboBoxEditor(color);
comboBox.setEditor(editor);
frame.add(comboBox, BorderLayout.NORTH);
final JLabel label = new JLabel();
label.setOpaque(true);
label.setBackground((Color)comboBox.getSelectedItem());
frame.add(label, BorderLayout.CENTER);
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
Color selectedColor = (Color)comboBox.getSelectedItem();
label.setBackground(selectedColor);
}
};
comboBox.addActionListener(actionListener);
frame.setSize(300, 200);
frame.setVisible(true);
}
};
EventQueue.invokeLater(runner);
}
}
Figure 13-18 shows the screen and a visible editor.
