org.faceless.pdf2.viewer2.feature

Class Undo

java.lang.Object

org.faceless.pdf2.viewer2.ViewerFeature

org.faceless.pdf2.viewer2.feature.Undo

All Implemented Interfaces:

ActionListener, EventListener, UndoableEditListener, DocumentPanelListener

public final class Undo
extends ViewerFeature
implements ActionListener, UndoableEditListener, DocumentPanelListener

This features adds an "Undo" and "Redo" entry to the Edit menu, which interfaces with the DocumentPanel.fireUndoableEditEvent(javax.swing.event.UndoableEditEvent) method to provide undo/redo across the Document. The name of this feature is Undo

This code is copyright the Big Faceless Organization. You're welcome to use, modify and distribute it in any form in your own projects, provided those projects continue to make use of the Big Faceless PDF library.

Since:

2.11.19

Field Summary

Fields

Modifier and Type	Field and Description
static UndoableEdit	DISCARD An UndableEdit which can be passed into DocumentPanel.fireUndoableEditEvent(javax.swing.event.UndoableEditEvent) to clear the list.

Constructor Summary

Constructors

Constructor and Description
Undo()

Method Summary

Modifier and Type	Method and Description
void	actionPerformed(ActionEvent e)
void	documentUpdated(DocumentPanelEvent event) Called when an DocumentPanelEvent is raised
void	initialize(PDFViewer viewer) Called when the feature is first added to a viewer
void	undoableEditHappened(UndoableEditEvent event)

Methods inherited from class org.faceless.pdf2.viewer2.ViewerFeature

getAllEnabledFeatures, getAllFeatures, getCustomJavaScript, getFeatureProperty, getFeatureURLProperty, getName, isEnabledByDefault, setFeatureName, teardown, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DISCARD

public static final UndoableEdit DISCARD

An UndableEdit which can be passed into DocumentPanel.fireUndoableEditEvent(javax.swing.event.UndoableEditEvent) to clear the list. This should be done when the list needs to be cleared, due to an action on the Document that permanently changes the state of the PDF.

Constructor Detail

Undo

public Undo()

Method Detail

actionPerformed

public void actionPerformed(ActionEvent e)

Specified by:

actionPerformed in interface ActionListener

initialize

public void initialize(PDFViewer viewer)

Description copied from class: ViewerFeature

Called when the feature is first added to a viewer

Overrides:

initialize in class ViewerFeature

documentUpdated

public void documentUpdated(DocumentPanelEvent event)

Description copied from interface: DocumentPanelListener

Called when an DocumentPanelEvent is raised

Specified by:

documentUpdated in interface DocumentPanelListener

undoableEditHappened

public void undoableEditHappened(UndoableEditEvent event)

Specified by:

undoableEditHappened in interface UndoableEditListener