Examples of javax.swing.text.Document.addUndoableEditListener()

javax.swing.text.Document.addUndoableEditListener()
Registers the given observer to begin receiving notifications when undoable edits are made to the document. @param listener the observer to register @see javax.swing.event.UndoableEditEvent

                    doc.removeUndoableEditListener(getUndoableEditListener());
                }


                doc = (Document)evt.getNewValue();
                if (doc != null) {
                    doc.addUndoableEditListener(getUndoableEditListener());
                }
            }
        }


    }

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        }
        
        Document doc = pane.getDocument();
        
        // Listen for undo and redo events
        doc.addUndoableEditListener(new UndoableEditListener() {
            public void undoableEditHappened(UndoableEditEvent evt) {
                if (isUndoable()) {
                    undomanager.addEdit(evt.getEdit());
                }
            }

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    /** Creates new form WikiEditorPanel */
    public WikiEditorPanel() {
        initComponents();
        Document doc = jTextWiki.getDocument();
        doc.addUndoableEditListener(new MyUndoableEditListener());
        jButtonUndo.setAction(undoAction);
        jButtonRedo.setAction(redoAction);
        
    }

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  private void makeUndoable(JTextComponent textComponent) {
    // code from: http://stackoverflow.com/a/12030993
    final UndoManager undoManager = new UndoManager();
    Document doc = textComponent.getDocument();
    doc.addUndoableEditListener(new UndoableEditListener() {
      @Override
      public void undoableEditHappened(UndoableEditEvent e) {
        //System.out.println("Add edit");
        undoManager.addEdit(e.getEdit());
      }

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  void InitializeUndo() {


    // Taken from
    // http://www.java2s.com/Tutorial/Java/0240__Swing/AddingUndoandRedotoaTextComponent.htm
    Document doc = jTextArea1.getDocument();
    doc.addUndoableEditListener(new UndoableEditListener() {
        public void undoableEditHappened(UndoableEditEvent evt) {
            undo.addEdit(evt.getEdit());
        }
    });

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        editMenu.addSeparator();
 
        editMenu.add(getActionByName(DefaultEditorKit.selectAllAction));
         
        final Document d = textPane.getDocument();
        d.addUndoableEditListener(new MyUndoableEditListener());
        d.addDocumentListener(new DocumentListener() {
            public void changedUpdate(DocumentEvent evt) { update(); }
            public void insertUpdate(DocumentEvent evt) { update(); }
            public void removeUpdate(DocumentEvent evt) { update(); }
            private void update() { countLabel.setText("Characters: " + d.getLength()); }

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   if (cb1 != null) {
      tfld.addActionListener(cb1);
      tfld.addFocusListener(new TextUnfocus(lbl,cb1));
    }
   if (cb2 != null) doc.addUndoableEditListener(cb2);


   addGBComponent(tfld,1,y_count++,0,1,10,0);


   tag_map.put(tfld,lbl);
   tag_map.put(doc,lbl);

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   addGBComponent(tag,0,y_count,1,1,0,0);


   JTextArea tarea = new JTextArea(val,row,col);
   Document doc = tarea.getDocument();


   if (cb != null) doc.addUndoableEditListener(cb);


   addGBComponent(new JScrollPane(tarea),1,y_count++,0,1,10,10);


   tarea.setBorder(new LineBorder(SwingColors.SWING_DARK_COLOR));

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   if (cb1 != null) {
      tfld.addActionListener(cb1);
      tfld.addFocusListener(new TextUnfocus(lbl,cb1));
    }


   if (cb2 != null) doc.addUndoableEditListener(cb2);


   if (cb3 != null) tfld.addCaretListener(cb3);


   addGBComponent(tfld,1,y_count,1,1,10,0);

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    final int redoKey   = isMacOS ? KeyEvent.VK_Z : KeyEvent.VK_Y;
    final int redoMod    = isMacOS ? meta | InputEvent.SHIFT_MASK : meta;
     imap.put( KeyStroke.getKeyStroke( redoKey, redoMod ), "redo" );


     final Document doc = getDocument(); 
     doc.addUndoableEditListener( this );
     
     // create default tabs
    tabs = new TabStop[ 30 ];
    for( int i = 0; i < 30; i++ ) {
      tabs[ i ] = new TabStop( i * 28 );

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