Class draw2d.CommandStack

Object
   |
   +--draw2d.CommandStack

class draw2d.CommandStack

Defined in CommandStack.js

Version: 0.9.14

Author: Andreas Herz

Field Detail

POST_EXECUTE

<static> Object POST_EXECUTE

Constant indicating notification after a command has been executed (value is 8).

POST_MASK

<static> Object POST_MASK

POST_REDO

<static> Object POST_REDO

Constant indicating notification after a command has been redone (value is 16).

POST_UNDO

<static> Object POST_UNDO

Constant indicating notification after a command has been undone (value is 32).

PRE_EXECUTE

<static> Object PRE_EXECUTE

Constant indicating notification prior to executing a command (value is 1).

PRE_MASK

<static> Object PRE_MASK

PRE_REDO

<static> Object PRE_REDO

Constant indicating notification prior to redoing a command (value is 2).

PRE_UNDO

<static> Object PRE_UNDO

Constant indicating notification prior to undoing a command (value is 4).

draw2d.CommandStack

draw2d.CommandStack()

Version: 0.9.14

Author: Andreas Herz

addCommandStackEventListener

void addCommandStackEventListener( <draw2d.CommandStackListener> listener)

Adds a listener to the command stack, which will be notified whenever a command has been processed on the stack.

Parameters:
listener - the listener to add.

canRedo

boolean canRedo()

Returns:
true if it is appropriate to call ().

canUndo

boolean canUndo()

Returns:
true if () can be called

execute

void execute( <draw2d.Command> command)

Executes the specified Command if possible. Prior to executing the command, a draw2d.CommandStackEvent for PRE_EXECUTE will be fired to event listeners. Similarly, after attempting to execute the command, an event for POST_EXECUTE will be fired.

Parameters:
command - The command to execute.

markSaveLocation

void markSaveLocation()

Remove the undo / redo history. This is usefull if the user has been save the document.

notifyListeners

void notifyListeners( <draw2d.Command> command, <int> state)

Notifies command stack event listeners that the command stack has changed to the specified state.

Parameters:
command - the command
state - the current stack state

redo

void redo()

Redo the command after the user has undo this command

removeCommandStackEventListener

void removeCommandStackEventListener( <draw2d.CommandStackListener> listener)

Removes a listener from the command stack.

Parameters:
listener - the listener to remove.

setUndoLimit

void setUndoLimit( <int> count)

Set the maximal undo stack size. Entries will be remove if the max. stack size has been reached.

Parameters:
count - The maximal undo stack size.

undo

void undo()

Undo the command