bind Undo Manager for JTextComponent - Java Swing

Java examples for Swing:JTextComponent

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Description

bind Undo Manager for JTextComponent

Demo Code


//package com.java2s;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.KeyStroke;
import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;
import javax.swing.text.JTextComponent;
import javax.swing.undo.CannotRedoException;
import javax.swing.undo.CannotUndoException;
import javax.swing.undo.UndoManager;

public class Main {
    public static void bindUndoManager(final JTextComponent text,
            final UndoManager undo) {

        text.getDocument().addUndoableEditListener(
                new UndoableEditListener() {
                    @Override/*from  w  w  w . j a  v a  2 s. c  o m*/
                    public void undoableEditHappened(UndoableEditEvent e) {
                        undo.addEdit(e.getEdit());
                    }
                });

        text.getActionMap().put("Undo", new AbstractAction("Undo") {
            private static final long serialVersionUID = 1L;

            public void actionPerformed(ActionEvent evt) {
                try {
                    if (undo.canUndo()) {
                        undo.undo();
                    }
                } catch (CannotUndoException e) {
                }
            }
        });
        // Bind the undo action to ctl-Z
        text.getInputMap().put(KeyStroke.getKeyStroke("control Z"), "Undo");

        // Create a redo action and add it to the text component
        text.getActionMap().put("Redo", new AbstractAction("Redo") {
            private static final long serialVersionUID = 1L;

            public void actionPerformed(ActionEvent evt) {
                try {
                    if (undo.canRedo()) {
                        undo.redo();
                    }
                } catch (CannotRedoException e) {
                }
            }
        });
        // Bind the redo action to ctl-Y 
        text.getInputMap().put(KeyStroke.getKeyStroke("control Y"), "Redo");
    }
}

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