toolbarexample.java

java swing 开发代码

//  ToolBarExample.java
// An example of JToolBar.  The actions used to build the toolbar are also
// placed in a JMenu to further demonstrate the flexibility of the Action
// class.  (See the examples in Chapter 3 for more details on Action.)
//
package	jswing.ch14;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class ToolBarExample extends JPanel {

    public JTextPane pane;
    public JMenuBar menuBar;
    public JToolBar toolBar;
    String fonts[] =
                {"Serif","SansSerif","Monospaced","Dialog","DialogInput"};

    public ToolBarExample() {
        menuBar = new JMenuBar();

        // Create a set of actions to use in both the menu and toolbar
        DemoAction leftJustifyAction = new DemoAction("Left",
            new ImageIcon("left.gif"), "Left justify text", 'L');
        DemoAction rightJustifyAction = new DemoAction("Right",
            new ImageIcon("right.gif"), "Right justify text", 'R');
        DemoAction centerJustifyAction = new DemoAction("Center",
            new ImageIcon("center.gif"), "Center justify text", 'M');
        DemoAction fullJustifyAction = new DemoAction("Full",
            new ImageIcon("full.gif"), "Full justify text", 'F');

       JMenu formatMenu = new JMenu("Justify");
       formatMenu.add(leftJustifyAction);
       formatMenu.add(rightJustifyAction);
       formatMenu.add(centerJustifyAction);
       formatMenu.add(fullJustifyAction);

       menuBar.add(formatMenu);

       toolBar = new JToolBar("Formatting");
       toolBar.add(leftJustifyAction);
       toolBar.add(rightJustifyAction);
       toolBar.add(centerJustifyAction);
       toolBar.add(fullJustifyAction);

       toolBar.addSeparator();
       JLabel label = new JLabel("Font");
       toolBar.add(label);

       toolBar.addSeparator();
       JComboBox combo = new JComboBox(fonts);
       combo.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {
               try { pane.getStyledDocument().insertString(0,
                   "Font [" + ((JComboBox)e.getSource()).getSelectedItem() +
                   "] chosen!\n", null);
               } catch (Exception ex) { ex.printStackTrace(); }
           }
       });
       toolBar.add(combo);
 
       //  Disable one of the Actions
       fullJustifyAction.setEnabled(false);
    }

    public static void main(String s[]) {

        ToolBarExample example = new ToolBarExample();
        example.pane = new JTextPane();
        example.pane.setPreferredSize(new Dimension(250, 250));
        example.pane.setBorder(new BevelBorder(BevelBorder.LOWERED));
        example.toolBar.setMaximumSize(example.toolBar.getSize());

        JFrame frame = new JFrame("Menu Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setJMenuBar(example.menuBar);
        frame.getContentPane().add(example.toolBar, BorderLayout.NORTH);
        frame.getContentPane().add(example.pane, BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
    }

    class DemoAction extends AbstractAction {
   
        public DemoAction(String text, Icon icon, String description,
                          char accelerator) {
            super(text, icon);
            putValue(ACCELERATOR_KEY, KeyStroke.getKeyStroke(accelerator,
                       Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
            putValue(SHORT_DESCRIPTION, description);
        }

        public void actionPerformed(ActionEvent e) {
            try { pane.getStyledDocument().insertString(0,
                  "Action [" + getValue(NAME) + "] performed!\n", null);
            } catch (Exception ex) { ex.printStackTrace(); } 
        }
    }
}