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< div class = "subTitle" > com.mxgraph.util< / div >
< h2 title = "Class mxUndoManager" class = "title" > Class mxUndoManager< / h2 >
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< li > < a href = "../../../com/mxgraph/util/mxEventSource.html" title = "class in com.mxgraph.util" > com.mxgraph.util.mxEventSource< / a > < / li >
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< li > com.mxgraph.util.mxUndoManager< / li >
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< pre > public class < span class = "strong" > mxUndoManager< / span >
extends < a href = "../../../com/mxgraph/util/mxEventSource.html" title = "class in com.mxgraph.util" > mxEventSource< / a > < / pre >
< div class = "block" > Implements an undo history.
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This class fires the following events:
mxEvent.CLEAR fires after clear was executed. The event has no properties.
mxEvent.UNDO fires afer a significant edit was undone in undo. The
< code > edit< / code > property contains the mxUndoableEdit that was undone.
mxEvent.REDO fires afer a significant edit was redone in redo. The
< code > edit< / code > property contains the mxUndoableEdit that was redone.
mxEvent.ADD fires after an undoable edit was added to the history. The
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< code > edit< / code > property contains the mxUndoableEdit that was added.< / div >
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< td class = "colFirst" > < code > protected < a href = "http://download.oracle.com/javase/1.5.0/docs/api/java/util/List.html?is-external=true" title = "class or interface in java.util" > List< / a > < < a href = "../../../com/mxgraph/util/mxUndoableEdit.html" title = "class in com.mxgraph.util" > mxUndoableEdit< / a > > < / code > < / td >
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< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#history" > history< / a > < / strong > < / code >
< div class = "block" > List that contains the steps of the command history.< / div >
< / td >
< / tr >
< tr class = "rowColor" >
< td class = "colFirst" > < code > protected int< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#indexOfNextAdd" > indexOfNextAdd< / a > < / strong > < / code >
< div class = "block" > Index of the element to be added next.< / div >
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< td class = "colFirst" > < code > protected int< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#size" > size< / a > < / strong > < / code >
< div class = "block" > Maximum command history size.< / div >
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< code > < a href = "../../../com/mxgraph/util/mxEventSource.html#eventListeners" > eventListeners< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#eventsEnabled" > eventsEnabled< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#eventSource" > eventSource< / a > < / code > < / li >
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< td class = "colOne" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#mxUndoManager()" > mxUndoManager< / a > < / strong > ()< / code >
< div class = "block" > Constructs a new undo manager with a default history size.< / div >
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< td class = "colOne" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#mxUndoManager(int)" > mxUndoManager< / a > < / strong > (int size)< / code >
< div class = "block" > Constructs a new undo manager for the specified size.< / div >
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< td class = "colFirst" > < code > boolean< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#canRedo()" > canRedo< / a > < / strong > ()< / code >
< div class = "block" > Returns true if a redo is possible.< / div >
< / td >
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< td class = "colFirst" > < code > boolean< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#canUndo()" > canUndo< / a > < / strong > ()< / code >
< div class = "block" > Returns true if an undo is possible.< / div >
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< td class = "colFirst" > < code > void< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#clear()" > clear< / a > < / strong > ()< / code >
< div class = "block" > Clears the command history.< / div >
< / td >
< / tr >
< tr class = "rowColor" >
< td class = "colFirst" > < code > boolean< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#isEmpty()" > isEmpty< / a > < / strong > ()< / code > < / td >
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< td class = "colFirst" > < code > void< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#redo()" > redo< / a > < / strong > ()< / code >
< div class = "block" > Redoes the last change.< / div >
< / td >
< / tr >
< tr class = "rowColor" >
< td class = "colFirst" > < code > protected void< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#trim()" > trim< / a > < / strong > ()< / code >
< div class = "block" > Removes all pending steps after indexOfNextAdd from the history,
invoking die on each edit.< / div >
< / td >
< / tr >
< tr class = "altColor" >
< td class = "colFirst" > < code > void< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#undo()" > undo< / a > < / strong > ()< / code >
< div class = "block" > Undoes the last change.< / div >
< / td >
< / tr >
< tr class = "rowColor" >
< td class = "colFirst" > < code > void< / code > < / td >
< td class = "colLast" > < code > < strong > < a href = "../../../com/mxgraph/util/mxUndoManager.html#undoableEditHappened(com.mxgraph.util.mxUndoableEdit)" > undoableEditHappened< / a > < / strong > (< a href = "../../../com/mxgraph/util/mxUndoableEdit.html" title = "class in com.mxgraph.util" > mxUndoableEdit< / a > undoableEdit)< / code >
< div class = "block" > Method to be called to add new undoable edits to the history.< / div >
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< code > < a href = "../../../com/mxgraph/util/mxEventSource.html#addListener(java.lang.String, com.mxgraph.util.mxEventSource.mxIEventListener)" > addListener< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#fireEvent(com.mxgraph.util.mxEventObject)" > fireEvent< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#fireEvent(com.mxgraph.util.mxEventObject, java.lang.Object)" > fireEvent< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#getEventSource()" > getEventSource< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#isEventsEnabled()" > isEventsEnabled< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#removeListener(com.mxgraph.util.mxEventSource.mxIEventListener)" > removeListener< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#removeListener(com.mxgraph.util.mxEventSource.mxIEventListener, java.lang.String)" > removeListener< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#setEventsEnabled(boolean)" > setEventsEnabled< / a > , < a href = "../../../com/mxgraph/util/mxEventSource.html#setEventSource(java.lang.Object)" > setEventSource< / a > < / code > < / li >
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< pre > protected int size< / pre >
< div class = "block" > Maximum command history size. 0 means unlimited history. Default is 100.< / div >
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< pre > protected < a href = "http://download.oracle.com/javase/1.5.0/docs/api/java/util/List.html?is-external=true" title = "class or interface in java.util" > List< / a > < < a href = "../../../com/mxgraph/util/mxUndoableEdit.html" title = "class in com.mxgraph.util" > mxUndoableEdit< / a > > history< / pre >
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< div class = "block" > List that contains the steps of the command history.< / div >
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< a name = "indexOfNextAdd" >
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< h4 > indexOfNextAdd< / h4 >
< pre > protected int indexOfNextAdd< / pre >
< div class = "block" > Index of the element to be added next.< / div >
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< pre > public mxUndoManager()< / pre >
< div class = "block" > Constructs a new undo manager with a default history size.< / div >
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< a name = "mxUndoManager(int)" >
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< pre > public mxUndoManager(int size)< / pre >
< div class = "block" > Constructs a new undo manager for the specified size.< / div >
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< h4 > clear< / h4 >
< pre > public void clear()< / pre >
< div class = "block" > Clears the command history.< / div >
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< div class = "block" > Returns true if an undo is possible.< / div >
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< h4 > undo< / h4 >
< pre > public void undo()< / pre >
< div class = "block" > Undoes the last change.< / div >
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