ptolemy.vergil.gt
Class GTFrameTools.DelegatedUndoStackAttribute

java.lang.Object
  ptolemy.kernel.util.NamedObj
      ptolemy.kernel.util.Attribute
          ptolemy.kernel.util.SingletonAttribute
              ptolemy.kernel.undo.UndoStackAttribute
                  ptolemy.vergil.gt.GTFrameTools.DelegatedUndoStackAttribute

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Changeable, Debuggable, DebugListener, Derivable, ModelErrorHandler, MoMLExportable, Moveable, Nameable, Singleton

Enclosing class:

GTFrameTools

public static class GTFrameTools.DelegatedUndoStackAttribute
extends UndoStackAttribute

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class ptolemy.kernel.util.NamedObj

NamedObj.ContainedObjectsIterator

Field Summary

private UndoStackAttribute

_oldAttribute

Fields inherited from class ptolemy.kernel.util.NamedObj

_changeListeners, _changeLock, _changeRequests, _debugging, _debugListeners, _elementName, _isPersistent, _verbose, _workspace, ATTRIBUTES, CLASSNAME, COMPLETE, CONTENTS, DEEP, FULLNAME, LINKS

Constructor Summary

GTFrameTools.DelegatedUndoStackAttribute(NamedObj container, java.lang.String name, UndoStackAttribute oldAttribute)

Method Summary

void	mergeTopTwo() Merge the top two undo entries into a single action, unless we are in either a redo or an undo, in which case the merge happens automatically and need not be explicitly requested by the client.
void	push(UndoAction action) Push an action to the undo stack, or if we are executing an undo, onto the redo stack.
void	redo() Remove the top redo action and execute it.
void	undo() Remove the top undo action and execute it.

Methods inherited from class ptolemy.kernel.undo.UndoStackAttribute

getUndoInfo

Methods inherited from class ptolemy.kernel.util.SingletonAttribute

setContainer

Methods inherited from class ptolemy.kernel.util.Attribute

_checkContainer, _getContainedObject, _propagateExistence, clone, getContainer, moveDown, moveToFirst, moveToIndex, moveToLast, moveUp, setName, updateContent

Methods inherited from class ptolemy.kernel.util.NamedObj

_addAttribute, _adjustOverride, _attachText, _cloneFixAttributeFields, _debug, _debug, _debug, _debug, _debug, _description, _exportMoMLContents, _getIndentPrefix, _isMoMLSuppressed, _markContentsDerived, _propagateValue, _recordDecoratedAttributes, _removeAttribute, _splitName, _stripNumericSuffix, _validateSettables, addChangeListener, addDebugListener, attributeChanged, attributeList, attributeList, attributeTypeChanged, clone, containedObjectsIterator, deepContains, depthInHierarchy, description, description, event, executeChangeRequests, exportMoML, exportMoML, exportMoML, exportMoML, exportMoML, exportMoMLPlain, getAttribute, getAttribute, getAttributes, getChangeListeners, getClassName, getDecoratorAttribute, getDecoratorAttributes, getDerivedLevel, getDerivedList, getDisplayName, getElementName, getFullName, getModelErrorHandler, getName, getName, getPrototypeList, getSource, handleModelError, isDeferringChangeRequests, isOverridden, isPersistent, lazyContainedObjectsIterator, message, propagateExistence, propagateValue, propagateValues, removeChangeListener, removeDebugListener, requestChange, setClassName, setDeferringChangeRequests, setDerivedLevel, setDisplayName, setModelErrorHandler, setPersistent, setSource, sortContainedObjects, toplevel, toString, uniqueName, validateSettables, workspace

Methods inherited from class java.lang.Object

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

Field Detail

_oldAttribute

private UndoStackAttribute _oldAttribute

Constructor Detail

GTFrameTools.DelegatedUndoStackAttribute

public GTFrameTools.DelegatedUndoStackAttribute(NamedObj container,
                                                java.lang.String name,
                                                UndoStackAttribute oldAttribute)
                                         throws IllegalActionException,
                                                NameDuplicationException

Throws:

IllegalActionException

NameDuplicationException

Method Detail

mergeTopTwo

public void mergeTopTwo()

Description copied from class: UndoStackAttribute

Merge the top two undo entries into a single action, unless we are in either a redo or an undo, in which case the merge happens automatically and need not be explicitly requested by the client. If there are fewer than two entries on the stack, do nothing. Note that when two entries are merged, the one on the top of the stack becomes the first one executed and the one below that on the stack becomes the second one executed. This method gets write access on the workspace.

Overrides:

mergeTopTwo in class UndoStackAttribute

push

public void push(UndoAction action)

Description copied from class: UndoStackAttribute

Push an action to the undo stack, or if we are executing an undo, onto the redo stack. This method gets write access on the workspace.

Overrides:

push in class UndoStackAttribute

Parameters:

action - The undo action.

redo

public void redo()
          throws java.lang.Exception

Description copied from class: UndoStackAttribute

Remove the top redo action and execute it. If there are no redo entries, do nothing. This method gets write access on the workspace.

Overrides:

redo in class UndoStackAttribute

Throws:

java.lang.Exception - If something goes wrong.

undo

public void undo()
          throws java.lang.Exception

Description copied from class: UndoStackAttribute

Remove the top undo action and execute it. If there are no undo entries, do nothing. This method gets write access on the workspace.

Overrides:

undo in class UndoStackAttribute

Throws:

java.lang.Exception - If something goes wrong.