---

Common/vtkCommand.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkCommand.h,v $
  Language:  C++

  Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef __vtkCommand_h
#define __vtkCommand_h

#include "vtkObjectBase.h"

class vtkObject;

// The superclass that all commands should be subclasses of
class VTK_COMMON_EXPORT vtkCommand : public vtkObjectBase
{
public:

  void UnRegister();
  virtual void UnRegister(vtkObjectBase *) 
    { this->UnRegister(); }
  

  virtual void Execute(vtkObject *caller, unsigned long eventId, 
                       void *callData) = 0;


  static const char *GetStringFromEventId(unsigned long event);
  static unsigned long GetEventIdFromString(const char *event);


  void SetAbortFlag(int f)  
    { if(this->AbortFlag) *this->AbortFlag = f; }
  int GetAbortFlag() 
    { return (this->AbortFlag) ? *this->AbortFlag: 0; }
  void AbortFlagOn() 
    { this->SetAbortFlag(1); }
  void AbortFlagOff() 
    { this->SetAbortFlag(0); }
  
//BTX
  /*! All the currently defined events are listed here.  Developers can use
      -- vtkCommand::UserEvent + int to specify their own event ids. If
      this list is adjusted, be sure to adjust vtkCommandEventStrings in
      vtkCommand.cxx to match. */
  enum EventIds {
    NoEvent = 0,
    AnyEvent,
    DeleteEvent,
    StartEvent,
    EndEvent,
    ProgressEvent,
    PickEvent,
    StartPickEvent,
    EndPickEvent,
    AbortCheckEvent,
    ExitEvent,
    LeftButtonPressEvent,
    LeftButtonReleaseEvent,
    MiddleButtonPressEvent,
    MiddleButtonReleaseEvent,
    RightButtonPressEvent,
    RightButtonReleaseEvent,
    EnterEvent,
    LeaveEvent,
    KeyPressEvent,
    KeyReleaseEvent,
    CharEvent,
    ExposeEvent,
    ConfigureEvent,
    TimerEvent,
    MouseMoveEvent,
    ResetCameraEvent,
    ResetCameraClippingRangeEvent,
    ModifiedEvent,
    WindowLevelEvent,
    StartWindowLevelEvent,
    EndWindowLevelEvent,
    ResetWindowLevelEvent,
    NextDataEvent,
    PushDataStartEvent,
    SetOutputEvent,
    EndOfDataEvent,
    ErrorEvent,
    WarningEvent,
    StartInteractionEvent, //mainly used by vtkInteractorObservers
    InteractionEvent,
    EndInteractionEvent,
    EnableEvent,
    DisableEvent,
    CreateTimerEvent,
    DestroyTimerEvent,
    PlaceWidgetEvent,
    CursorChangedEvent,
    ExecuteInformationEvent,
    RenderWindowMessageEvent,
    UserEvent = 1000
  };
//ETX

protected:
  int* AbortFlag;
  vtkCommand();
  virtual ~vtkCommand() {}

  //helper function for manipulating abort flag
  void SetAbortFlagPointer(int* f)  
    { this->AbortFlag = f; }

  friend class vtkSubjectHelper;
//BTX
  vtkCommand(const vtkCommand& c) : vtkObjectBase(c) {}
  void operator=(const vtkCommand&) {}
//ETX
};

#endif /* __vtkCommand_h */
 

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