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< div class = "subTitle" > < span class = "packageLabelInType" > Package< / span > < a href = "../../../com/mxgraph/util/package-summary.html" > com.mxgraph.util< / a > < / div >
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< h2 title = "Class mxUndoManager" class = "title" > Class mxUndoManager< / h2 >
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< li > java.lang.Object< / li >
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< pre > public class < span class = "typeNameLabel" > mxUndoManager< / span >
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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 java.util.List< < a href = "../../../com/mxgraph/util/mxUndoableEdit.html" title = "class in com.mxgraph.util" > mxUndoableEdit< / a > > < / code > < / td >
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< th class = "colSecond" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#history" > history< / a > < / span > < / code > < / th >
< td class = "colLast" >
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< div class = "block" > List that contains the steps of the command history.< / div >
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< td class = "colFirst" > < code > protected int< / code > < / td >
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< th class = "colSecond" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#indexOfNextAdd" > indexOfNextAdd< / a > < / span > < / code > < / th >
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< div class = "block" > Index of the element to be added next.< / div >
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< td class = "colFirst" > < code > protected int< / code > < / td >
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< th class = "colSecond" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#size" > size< / a > < / span > < / code > < / th >
< td class = "colLast" >
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< 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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< th class = "colConstructorName" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#mxUndoManager--" > mxUndoManager< / a > < / span > ()< / code > < / th >
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< div class = "block" > Constructs a new undo manager with a default history size.< / div >
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< th class = "colConstructorName" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#mxUndoManager-int-" > mxUndoManager< / a > < / span > ​ (int size)< / code > < / th >
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< div class = "block" > Constructs a new undo manager for the specified size.< / div >
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< div class = "block" > Returns true if a redo is possible.< / div >
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< td class = "colLast" >
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< div class = "block" > Returns true if an undo is possible.< / div >
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< th class = "colSecond" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#clear--" > clear< / a > < / span > ()< / code > < / th >
< td class = "colLast" >
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< div class = "block" > Clears the command history.< / div >
< / td >
< / tr >
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< tr id = "i3" class = "rowColor" >
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< td class = "colFirst" > < code > boolean< / code > < / td >
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< th class = "colSecond" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#isEmpty--" > isEmpty< / a > < / span > ()< / code > < / th >
< td class = "colLast" > < / td >
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< / tr >
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< td class = "colFirst" > < code > void< / code > < / td >
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< th class = "colSecond" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#redo--" > redo< / a > < / span > ()< / code > < / th >
< td class = "colLast" >
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< div class = "block" > Redoes the last change.< / div >
< / td >
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< tr id = "i5" class = "rowColor" >
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< td class = "colFirst" > < code > protected void< / code > < / td >
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< th class = "colSecond" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#trim--" > trim< / a > < / span > ()< / code > < / th >
< td class = "colLast" >
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< div class = "block" > Removes all pending steps after indexOfNextAdd from the history,
invoking die on each edit.< / div >
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< / tr >
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< td class = "colFirst" > < code > void< / code > < / td >
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< th class = "colSecond" scope = "row" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/util/mxUndoManager.html#undo--" > undo< / a > < / span > ()< / code > < / th >
< td class = "colLast" >
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< div class = "block" > Undoes the last change.< / div >
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< td class = "colFirst" > < code > void< / code > < / td >
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< 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 java.util.List< < a href = "../../../com/mxgraph/util/mxUndoableEdit.html" title = "class in com.mxgraph.util" > mxUndoableEdit< / a > > history< / pre >
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< pre > public void undoableEditHappened​ (< a href = "../../../com/mxgraph/util/mxUndoableEdit.html" title = "class in com.mxgraph.util" > mxUndoableEdit< / a > undoableEdit)< / pre >
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< div class = "block" > Removes all pending steps after indexOfNextAdd from the history,
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