7.23 kCADEventIDUndoRedo

kCADEventPhaseBefore

A kCADEventPhaseBefore phase of the kCADEventIDUndoRedo event is triggered when the user chooses Undo or Redo in the Edit menu or presses command-z (see Undo and redo). The undo action can be a standard undo or an undo defined by the application (see CADTriggerUndo). The action can be intercepted.

IO	Parameter	Type	Description
in	theCADArea	longint	Area ID
in	theEventID	longint	kCADEventIDUndoRedo
in	theEventPhase	longint	kCADEventPhaseBefore
in	theEventData1	longint	The type of undo, a undo constant
in	theEventData2	longint	kCADTrue if a redo, kCADFalse if not
in	theEventData3	longint	Scope or Object ID (not a modifiable scope)
in	theEventData4	longint	theUndoByAppEventParam of CADTriggerUndo, or 0
in	theMouseX	real	0.0
in	theMouseY	real	0.0
in	theEventValue1	real	0.0
in	theEventValue2	real	0.0
in	theKeyAsciiValue	integer	ASCII character value of pressed key, or 0
in	theModifiers	longint	Sum of pressed modifier keys, a mask of modifier key constants
in	theTickCount	longint	Tick count of the system software (a tick is a 1/60th of a second)
out	theEventResult	longint	Set to kCADEventResultDoFilter to filter out the event or to kCADEventResultDontFilter to let it pass.

kCADEventPhaseAfter

An kCADEventPhaseAfter phase is generated when the kCADEventPhaseBefore phase passed and the undo or redo action has taken place.

IO	Parameter	Type	Description
in	theCADArea	longint	Area ID
in	theEventID	longint	kCADEventIDUndoRedo
in	theEventPhase	longint	kCADEventPhaseAfter
in	theEventData1	longint	The type of undo, a undo constant
in	theEventData2	longint	kCADTrue if a redo, kCADFalse if not
in	theEventData3	longint	Scope or Object ID (not a modifiable scope)
in	theEventData4	longint	theUndoByAppEventParam of CADTriggerUndo, or 0
in	theMouseX	real	0.0
in	theMouseY	real	0.0
in	theEventValue1	real	0.0
in	theEventValue2	real	0.0
in	theKeyAsciiValue	integer	ASCII character value of pressed key, or 0
in	theModifiers	longint	Sum of pressed modifier keys, a mask of modifier key constants
in	theTickCount	longint	Tick count of the system software (a tick is a 1/60th of a second)
out	theEventResult	longint	Set to kCADEventResultTriggerUndoRedo to trigger an undo and redo. Set to kCADEventResultTriggerUndoOnly to trigger an undo only. Set to kCADEventResultTriggerNone to trigger nothing.