undostyleframe.java

JGraph扩展应用。自定义Renderer,自定义视图View实现自定义工作流控件

/**
 * 
 */
package flow.graph.test.test;

/**
 * @author Administrator
 *
 */
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.SwingConstants;
import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
import javax.swing.undo.UndoableEdit;

public class UndoStyleFrame extends JFrame{

  protected UndoAct undoAction = new UndoAct(); // an Action for undo

  protected RedoAct redoAction = new RedoAct(); // an Action for redo
  protected JTextPane textPane;
  protected JMenuBar menuBar;
  public UndoStyleFrame() {
    super();
	textPane = new JTextPane();
    setTitle("UndoStyleFrame");

    // register the Actions as undo listeners (we inherited textPane)
    textPane.getDocument().addUndoableEditListener(undoAction);
    textPane.getDocument().addUndoableEditListener(redoAction);

    // create menu for undo/redo
	menuBar = new JMenuBar();
    JMenu editMenu = new JMenu("Edit");
    editMenu.add(new JMenuItem(undoAction));
    editMenu.add(new JMenuItem(redoAction));
    menuBar.add(editMenu); // we inherited menuBar from superclass

    // create buttons for undo/redo
    JPanel buttonPanel = new JPanel();
    buttonPanel.add(new JButton(undoAction));
    buttonPanel.add(new JButton(redoAction));
	getContentPane().setLayout(new BorderLayout());
    getContentPane().add(menuBar, BorderLayout.NORTH);
    getContentPane().add(textPane, BorderLayout.CENTER);
    getContentPane().add(buttonPanel, BorderLayout.SOUTH);
  }

  // begin inner classes ------------

  public class UndoAct extends AbstractAction implements UndoableEditListener {
    private UndoableEdit edit;

    public UndoAct() {
      super("Undo");
      setEnabled(false);
    }

    public void updateEnabled() {
      setEnabled(edit.canUndo());
    }

    public void undoableEditHappened(UndoableEditEvent event) {
      edit = event.getEdit();
      putValue(NAME, edit.getUndoPresentationName());
      updateEnabled();
    }

    public void actionPerformed(ActionEvent ae) {
      edit.undo();
      updateEnabled(); // disable undo
      redoAction.updateEnabled(); // enable redo
    }
  }

  public class RedoAct extends AbstractAction implements UndoableEditListener {
    private UndoableEdit edit;

    public RedoAct() {
      super("Redo");
      setEnabled(false);
    }

    public void updateEnabled() {
      setEnabled(edit.canRedo());
    }

    public void undoableEditHappened(UndoableEditEvent event) {
      edit = event.getEdit();
      putValue(NAME, edit.getRedoPresentationName());
      updateEnabled();
    }

    public void actionPerformed(ActionEvent ae) {
      edit.redo();
      updateEnabled(); // disable redo
      undoAction.updateEnabled(); // enable undo
    }
  }

  // end inner classes ------------

  public static void main(String[] args) {
	  System.out.println("1----------------");
    JFrame frame = new UndoStyleFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(400, 300);
    frame.setVisible(true);
  }
}