Java Tutorial/Swing/UI Delegate

14. Creating a New UI Delegate

   <source lang="java">

Swing Component Class ID String Implementation Class JButton ButtonUI ButtonUI JCheckBox CheckBoxUI ButtonUI JCheckBoxMenuItem CheckBoxMenuItemUI MenuItemUI JColorChooser ColorChooserUI ColorChooserUI JComboBox ComboBoxUI ComboBoxUI JComponent n/a ComponentUI JDesktopPane DesktopPaneUI DesktopPaneUI JEditorPane EditorPaneUI TextUI JFileChooser FileChooserUI FileChooserUI JFormattedTextField FormattedTextFieldUI TextUI JInternalFrame InternalFrameUI InternalFrameUI JInternalFrame.JDesktopIcon DesktopIconUI DesktopIconUI JLabel LabelUI LabelUI JList ListUI ListUI JMenu MenuUI MenuItemUI JMenuBar MenuBarUI MenuBarUI JMenuItem MenuItemUI MenuItemUI JOptionPane OptionPaneUI OptionPaneUI JPanel PanelUI PanelUI JPasswordField PasswordFieldUI TextUI JPopupMenu PopupMenuUI PopupMenuUI JPopupMenu.Separator PopupMenuSeparatorUI SeparatorUI JProgressBar ProgressBarUI ProgressBarUI JRadioButton RadioButtonUI ButtonUI JRadioButtonMenuItem RadioButtonMenuItemUI MenuItemUI JRootPane RootPaneUI RootPaneUI JScrollBar ScrollBarUI ScrollBarUI JScrollPane ScrollPaneUI ScrollPaneUI JSeparator SeparatorUI SeparatorUI JSlider SliderUI SliderUI JSpinner SpinnerUI SpinnerUI JSplitPane SplitPaneUI SplitPaneUI JTabbedPane TabbedPaneUI TabbedPaneUI JTable TableUI TableUI JTableHeader TableHeaderUI TableHeaderUI JTextArea TextAreaUI TextUI JTextField TextFieldUI TextUI JTextPane TextPaneUI TextUI JToggleButton ToggleButtonUI ButtonUI JToolBar ToolBarUI ToolBarUI JToolBar.Separator ToolBarSeparatorUI SeparatorUI JToolTip ToolTipUI ToolTipUI JTree TreeUI TreeUI JViewport ViewportUI ViewportUI</source>

14. Using Customized ComboBoxUI

   <source lang="java">

import java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.plaf.ruboBoxUI; import javax.swing.plaf.ruponentUI; import javax.swing.plaf.basic.BasicArrowButton; import javax.swing.plaf.basic.BasicComboBoxUI; class MyComboBoxUI extends BasicComboBoxUI {

 public static ComponentUI createUI(JComponent c) {
   return new MyComboBoxUI();
 }
 protected JButton createArrowButton() {
   JButton button = new BasicArrowButton(BasicArrowButton.EAST);
   return button;
 }

} public class PopupComboSample {

 public static void main(String args[]) {
   String labels[] = { "A", "B", "C", "D" };
   JFrame frame = new JFrame("Popup JComboBox");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JComboBox comboBox = new JComboBox(labels);
   comboBox.setUI((ComboBoxUI) MyComboBoxUI.createUI(comboBox));
   frame.add(comboBox, BorderLayout.NORTH);
   JComboBox comboBox2 = new JComboBox(labels);
   frame.add(comboBox2, BorderLayout.SOUTH);
   frame.setSize(300, 100);
   frame.setVisible(true);
 }

}</source>