KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > eclipse > team > internal > ccvs > ui > TextViewerAction


1 /*******************************************************************************
2  * Copyright (c) 2000, 2006 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.team.internal.ccvs.ui;
12
13  
14 import org.eclipse.jface.action.Action;
15 import org.eclipse.jface.text.ITextOperationTarget;
16 import org.eclipse.jface.text.ITextViewer;
17 import org.eclipse.ui.texteditor.IUpdate;
18
19 public class TextViewerAction extends Action implements IUpdate {
20     private int operationCode = -1;
21     private ITextOperationTarget operationTarget;
22
23     public TextViewerAction(ITextViewer viewer, int operationCode) {
24         this.operationCode = operationCode;
25         operationTarget = viewer.getTextOperationTarget();
26         update();
27     }
28     public void update() {
29         boolean wasEnabled = isEnabled();
30         boolean isEnabled = (operationTarget != null && operationTarget.canDoOperation(operationCode));
31         setEnabled(isEnabled);
32         if (wasEnabled != isEnabled) {
33             firePropertyChange(ENABLED, wasEnabled ? Boolean.TRUE : Boolean.FALSE, isEnabled ? Boolean.TRUE : Boolean.FALSE);
34         }
35     }
36     public void run() {
37         if (operationCode != -1 && operationTarget != null) {
38             operationTarget.doOperation(operationCode);
39         }
40     }
41 }
42
Popular Tags