Java JTextComponent Action setHistoryActions(JTextComponent textComponent)

Description

set History Actions

License

Open Source License

Declaration

private static void setHistoryActions(JTextComponent textComponent) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

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.Document;
import javax.swing.text.JTextComponent;

import javax.swing.undo.CannotRedoException;
import javax.swing.undo.CannotUndoException;
import javax.swing.undo.UndoManager;

public class Main {
    private static void setHistoryActions(JTextComponent textComponent) {
        Document doc = textComponent.getDocument();
        UndoManager undo = new UndoManager();
        doc.addUndoableEditListener(new UndoableEditListener() {
            @Override//from  w  ww  . ja va 2s .  c  o  m
            public void undoableEditHappened(UndoableEditEvent evt) {
                undo.addEdit(evt.getEdit());
            }
        });

        textComponent.getActionMap().put("Undo", new AbstractAction("Undo") {
            private static final long serialVersionUID = 2048749213313143683L;

            @Override
            public void actionPerformed(ActionEvent evt) {
                try {
                    if (undo.canUndo()) {
                        undo.undo();
                    }
                } catch (CannotUndoException e) {
                }
            }
        });
        textComponent.getInputMap().put(KeyStroke.getKeyStroke("control Z"), "Undo");

        textComponent.getActionMap().put("Redo", new AbstractAction("Redo") {
            private static final long serialVersionUID = 2048749213313143683L;

            @Override
            public void actionPerformed(ActionEvent evt) {
                try {
                    if (undo.canRedo()) {
                        undo.redo();
                    }
                } catch (CannotRedoException e) {
                }
            }
        });
        textComponent.getInputMap().put(KeyStroke.getKeyStroke("control Y"), "Redo");
    }
}

Related

1. getAction(JTextComponent component, String actionName)
2. getAction(JTextComponent target, Class aClass)