metadone.metabusiness.impl.UndoRedoManager_impl Class Reference

Inheritance diagram for metadone.metabusiness.impl.UndoRedoManager_impl:

Collaboration diagram for metadone.metabusiness.impl.UndoRedoManager_impl:

List of all members.

Classes
class	UndoEventGroup
class	UndoRedoList
Public Member Functions
	UndoRedoManager_impl (Workspace workspace)
final Workspace	getWorkspace ()
Object	getContext ()
synchronized boolean	addContext (Object context)
synchronized boolean	removeContext (Object context)
boolean	canRedo ()
synchronized void	redo () throws UndoRedoException
synchronized void	undo () throws UndoRedoException
synchronized void	trigger (Metal1Event event)
Private Member Functions
synchronized UndoRedoList	getList ()
Private Attributes
final Workspace	workspace
final HashMap< Object, UndoRedoList >	map = new HashMap<Object, UndoRedoList>()
final LinkedList< Object >	context = new LinkedList<Object>()
volatile boolean	undoing
volatile boolean	redoing
Static Private Attributes
static final Logger	logger = Logger.getLogger(UndoRedoManager_impl.class)
static final long	EVENT_GROUP_DURATION_MILLI = 500

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Detailed Description

Implements partial undo/redo by observing the events and trying to reproduce the inverse transformation.

FIXME this is a bad way of implementing undo/redo it should be done for example by using a command pattern (also transactions at metal1/metal2 level would help)

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Constructor & Destructor Documentation

metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoManager_impl

(

Workspace

workspace

)

References metadone.metabusiness.impl.UndoRedoManager_impl.workspace.

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Member Function Documentation

synchronized boolean metadone.metabusiness.impl.UndoRedoManager_impl.addContext

(

Object

context

)

Adds a context on the context stack.

Parameters:

context

The new context

Returns:

true if the context was added

Implements metadone.metabusiness.UndoRedoManager.

boolean metadone.metabusiness.impl.UndoRedoManager_impl.canRedo

(

)

Indicates whether redo can be called.

The result is false if it makes no sense to redo, most of the time it means that undo() was not yet called.

Returns:

true if it is possible to redo

Implements metadone.metabusiness.UndoRedoManager.

References metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.canRedo(), metadone.metabusiness.impl.UndoRedoManager_impl.getContext(), and metadone.metabusiness.impl.UndoRedoManager_impl.map.

Object metadone.metabusiness.impl.UndoRedoManager_impl.getContext

(

)

Gets the current context.

Returns:

The context (may be null)

Implements metadone.metabusiness.UndoRedoManager.

References metadone.metabusiness.impl.UndoRedoManager_impl.context.

Referenced by metadone.metabusiness.impl.UndoRedoManager_impl.canRedo(), metadone.metabusiness.impl.UndoRedoManager_impl.getList(), metadone.metabusiness.impl.UndoRedoManager_impl.redo(), and metadone.metabusiness.impl.UndoRedoManager_impl.undo().

synchronized UndoRedoList metadone.metabusiness.impl.UndoRedoManager_impl.getList

(

)

[private]

References metadone.metabusiness.impl.UndoRedoManager_impl.getContext(), and metadone.metabusiness.impl.UndoRedoManager_impl.map.

Referenced by metadone.metabusiness.impl.UndoRedoManager_impl.trigger().

final Workspace metadone.metabusiness.impl.UndoRedoManager_impl.getWorkspace

(

)

Gets the workspace.

Returns:

The workspace

Implements metadone.metabusiness.UndoRedoManager.

References metadone.metabusiness.impl.UndoRedoManager_impl.workspace.

synchronized void metadone.metabusiness.impl.UndoRedoManager_impl.redo

(

)

throws UndoRedoException

Re-does the last undone operations.

Exceptions:

UndoRedoException

Implements metadone.metabusiness.UndoRedoManager.

References metadone.metabusiness.impl.UndoRedoManager_impl.getContext(), metadone.metabusiness.impl.UndoRedoManager_impl.map, metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.redo(), metadone.metabusiness.impl.UndoRedoManager_impl.redoing, and metadone.metabusiness.impl.UndoRedoManager_impl.undoing.

synchronized boolean metadone.metabusiness.impl.UndoRedoManager_impl.removeContext

(

Object

context

)

Removes the context from the stack.

Parameters:

context

The context

Returns:

true if the context was removed

Implements metadone.metabusiness.UndoRedoManager.

synchronized void metadone.metabusiness.impl.UndoRedoManager_impl.trigger

(

Metal1Event

event

)

References metadone.metabusiness.impl.UndoRedoManager_impl.getList(), and metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.trigger().

Referenced by metadone.metabusiness.impl.Workspace_impl.trigger().

synchronized void metadone.metabusiness.impl.UndoRedoManager_impl.undo

(

)

throws UndoRedoException

Undoes the last operations.

Exceptions:

UndoRedoException

Implements metadone.metabusiness.UndoRedoManager.

References metadone.metabusiness.impl.UndoRedoManager_impl.getContext(), metadone.metabusiness.impl.UndoRedoManager_impl.map, metadone.metabusiness.impl.UndoRedoManager_impl.redoing, metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.undo(), and metadone.metabusiness.impl.UndoRedoManager_impl.undoing.

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Member Data Documentation

final LinkedList<Object> metadone.metabusiness.impl.UndoRedoManager_impl.context = new LinkedList<Object>() [private]

Referenced by metadone.metabusiness.impl.UndoRedoManager_impl.getContext().

final long metadone.metabusiness.impl.UndoRedoManager_impl.EVENT_GROUP_DURATION_MILLI = 500 [static, private]

Referenced by metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.createNewGroup().

final Logger metadone.metabusiness.impl.UndoRedoManager_impl.logger = Logger.getLogger(UndoRedoManager_impl.class) [static, private]

Referenced by metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.undoredo().

final HashMap<Object, UndoRedoList> metadone.metabusiness.impl.UndoRedoManager_impl.map = new HashMap<Object, UndoRedoList>() [private]

Referenced by metadone.metabusiness.impl.UndoRedoManager_impl.canRedo(), metadone.metabusiness.impl.UndoRedoManager_impl.getList(), metadone.metabusiness.impl.UndoRedoManager_impl.redo(), and metadone.metabusiness.impl.UndoRedoManager_impl.undo().

volatile boolean metadone.metabusiness.impl.UndoRedoManager_impl.redoing [private]

Referenced by metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.redo(), metadone.metabusiness.impl.UndoRedoManager_impl.redo(), metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.trigger(), and metadone.metabusiness.impl.UndoRedoManager_impl.undo().

volatile boolean metadone.metabusiness.impl.UndoRedoManager_impl.undoing [private]

Referenced by metadone.metabusiness.impl.UndoRedoManager_impl.redo(), metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.trigger(), metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoList.undo(), and metadone.metabusiness.impl.UndoRedoManager_impl.undo().

final Workspace metadone.metabusiness.impl.UndoRedoManager_impl.workspace [private]

Referenced by metadone.metabusiness.impl.UndoRedoManager_impl.getWorkspace(), and metadone.metabusiness.impl.UndoRedoManager_impl.UndoRedoManager_impl().

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The documentation for this class was generated from the following file:

• metadone_bundle_metabusiness/src/metadone/metabusiness/impl/UndoRedoManager_impl.java