|
1
|
/*******************************************************************************
|
|
2
|
* Copyright (c) 2000, 2009 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.ui.internal.navigator.framelist;
|
|
12
|
|
|
13
|
import org.eclipse.osgi.util.NLS;
|
|
14
|
import org.eclipse.ui.ISharedImages;
|
|
15
|
import org.eclipse.ui.PlatformUI;
|
|
16
|
|
|
17
|
/**
|
|
18
|
* Generic "Back" action which goes back one frame,
|
|
19
|
* @since 3.4
|
|
20
|
*/
|
|
21
|
public class BackAction extends FrameAction {
|
|
22
|
|
|
23
|
private static final String ID = "org.eclipse.ui.framelist.back"; //$NON-NLS-1$
|
|
24
|
|
|
25
|
/**
|
|
26
|
* Constructs a new action for the specified frame list.
|
|
27
|
*
|
|
28
|
* @param frameList the frame list
|
|
29
|
*/
|
|
30
|
public BackAction(FrameList frameList) {
|
|
31
|
super(frameList);
|
|
32
|
setId(ID);
|
|
33
|
setText(FrameListMessages.Back_text);
|
|
34
|
ISharedImages images = PlatformUI.getWorkbench().getSharedImages();
|
|
35
|
setImageDescriptor(images
|
|
36
|
.getImageDescriptor(ISharedImages.IMG_TOOL_BACK));
|
|
37
|
setDisabledImageDescriptor(images
|
|
38
|
.getImageDescriptor(ISharedImages.IMG_TOOL_BACK_DISABLED));
|
|
39
|
PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
|
|
40
|
IFrameListHelpContextIds.BACK_ACTION);
|
|
41
|
update();
|
|
42
|
}
|
|
43
|
|
|
44
|
private Frame getPreviousFrame() {
|
|
45
|
FrameList list = getFrameList();
|
|
46
|
return list.getFrame(list.getCurrentIndex() - 1);
|
|
47
|
}
|
|
48
|
|
|
49
|
private String getToolTipText(Frame previousFrame) {
|
|
50
|
if (previousFrame != null) {
|
|
51
|
String text = previousFrame.getToolTipText();
|
|
52
|
if (text != null && text.length() > 0) {
|
|
53
|
return NLS.bind(FrameListMessages.Back_toolTipOneArg, text);
|
|
54
|
}
|
|
55
|
}
|
|
56
|
return FrameListMessages.Back_toolTip;
|
|
57
|
}
|
|
58
|
|
|
59
|
/**
|
|
60
|
* Calls <code>back()</code> on the frame list.
|
|
61
|
*/
|
|
62
|
public void run() {
|
|
63
|
getFrameList().back();
|
|
64
|
}
|
|
65
|
|
|
66
|
/**
|
|
67
|
* Updates this action's enabled state and tool tip text.
|
|
68
|
* This action is enabled only when there is a previous frame in the frame list.
|
|
69
|
* The tool tip text is "Back to " plus the tool tip text for the previous frame.
|
|
70
|
*/
|
|
71
|
public void update() {
|
|
72
|
super.update();
|
|
73
|
Frame previousFrame = getPreviousFrame();
|
|
74
|
setEnabled(previousFrame != null);
|
|
75
|
setToolTipText(getToolTipText(previousFrame));
|
|
76
|
}
|
|
77
|
|
|
78
|
}
|