Package org.apache.jmeter.gui

Class UndoHistory

java.lang.Object

org.apache.jmeter.gui.UndoHistory

All Implemented Interfaces:

Serializable, EventListener, TreeModelListener

public class UndoHistory
extends Object
implements TreeModelListener, Serializable

This class serves storing Test Tree state and navigating through it to give the undo/redo ability for test plan changes

Since:

2.12

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	UndoHistory.HistoryListener	Interface to be implemented by components interested in UndoHistory

Constructor Summary

Constructors

Constructor	Description
UndoHistory()

Method Summary

Modifier and Type	Method	Description
void	add(JMeterTreeModel treeModel, String comment)	Add tree model copy to the history
boolean	canRedo()
boolean	canUndo()
void	clear()	Clears the undo history
void	moveInHistory(int offset, JMeterTreeModel acceptorModel)	Goes through undo history, changing GUI
void	registerHistoryListener(UndoHistory.HistoryListener listener)	Register HistoryListener
void	treeNodesChanged(TreeModelEvent tme)	Record the changes in the node as the undo step
void	treeNodesInserted(TreeModelEvent tme)	Record adding nodes as the undo step
void	treeNodesRemoved(TreeModelEvent tme)	Record deleting nodes as the undo step
void	treeStructureChanged(TreeModelEvent tme)	Record some other change

Methods inherited from class java.lang.Object

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

Constructor Detail

UndoHistory

public UndoHistory()

Method Detail

clear

public void clear()

Clears the undo history

add

public void add(JMeterTreeModel treeModel,
                String comment)

Add tree model copy to the history

This method relies on the rule that the record in history made AFTER change has been made to test plan

Parameters:

treeModel - JMeterTreeModel

comment - String

moveInHistory

public void moveInHistory(int offset,
                          JMeterTreeModel acceptorModel)

Goes through undo history, changing GUI

Parameters:

offset - the direction to go to, usually -1 for undo or 1 for redo

acceptorModel - TreeModel to accept the changes

canRedo

public boolean canRedo()

Returns:

true if remaing items

canUndo

public boolean canUndo()

Returns:

true if not at first element

treeNodesChanged

public void treeNodesChanged(TreeModelEvent tme)

Record the changes in the node as the undo step

Specified by:

treeNodesChanged in interface TreeModelListener

Parameters:

tme - TreeModelEvent with event details

treeNodesInserted

public void treeNodesInserted(TreeModelEvent tme)

Record adding nodes as the undo step

Specified by:

treeNodesInserted in interface TreeModelListener

Parameters:

tme - TreeModelEvent with event details

treeNodesRemoved

public void treeNodesRemoved(TreeModelEvent tme)

Record deleting nodes as the undo step

Specified by:

treeNodesRemoved in interface TreeModelListener

Parameters:

tme - TreeModelEvent with event details

treeStructureChanged

public void treeStructureChanged(TreeModelEvent tme)

Record some other change

Specified by:

treeStructureChanged in interface TreeModelListener

Parameters:

tme - TreeModelEvent with event details

registerHistoryListener

public void registerHistoryListener(UndoHistory.HistoryListener listener)

Register HistoryListener

Parameters:

listener - to add to our listeners