dox/Rendering/vtkRenderWindowInteractor.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkRenderWindowInteractor.h,v $

  Copyright (c) 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 __vtkRenderWindowInteractor_h
#define __vtkRenderWindowInteractor_h

#include "vtkObject.h"

class vtkTimerIdMap;


// Timer flags for win32/X compatibility
#define VTKI_TIMER_FIRST  0
#define VTKI_TIMER_UPDATE 1

class vtkAbstractPicker;
class vtkAbstractPropPicker;
class vtkInteractorObserver;
class vtkRenderWindow;
class vtkRenderer;
class vtkObserverMediator;
class vtkInteractorEventRecorder;

class VTK_RENDERING_EXPORT vtkRenderWindowInteractor : public vtkObject
{
  //BTX
  friend class vtkInteractorEventRecorder;
  //ETX
public:
  static vtkRenderWindowInteractor *New();
  vtkTypeRevisionMacro(vtkRenderWindowInteractor,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);


  virtual void Initialize();
  void ReInitialize() {  this->Initialized = 0; this->Enabled = 0;
                        this->Initialize(); } 

  virtual void UnRegister(vtkObjectBase *o);

  virtual void Start() {}


  virtual void Enable() { this->Enabled = 1; this->Modified();}
  virtual void Disable() { this->Enabled = 0; this->Modified();}
  vtkGetMacro(Enabled, int);


  vtkBooleanMacro(EnableRender, bool);
  vtkSetMacro(EnableRender, bool);
  vtkGetMacro(EnableRender, bool);


  void SetRenderWindow(vtkRenderWindow *aren);
  vtkGetObjectMacro(RenderWindow,vtkRenderWindow);

  virtual void UpdateSize(int x,int y);


  virtual int CreateTimer(int timerType); //first group, for backward compatibility
  virtual int DestroyTimer(); //first group, for backward compatibility
  int CreateRepeatingTimer(unsigned long duration);
  int CreateOneShotTimer(unsigned long duration);
  int IsOneShotTimer(int timerId);
  unsigned long GetTimerDuration(int timerId);
  int ResetTimer(int timerId);
  int DestroyTimer(int timerId);
  virtual int GetVTKTimerId(int platformTimerId);

  //BTX
  // Moved into the public section of the class so that classless timer procs
  // can access these enum members without being "friends"...
  enum {OneShotTimer=1,RepeatingTimer};
  //ETX


  vtkSetClampMacro(TimerDuration,unsigned long,1,100000);
  vtkGetMacro(TimerDuration,unsigned long);


  vtkSetMacro(TimerEventId, int);
  vtkGetMacro(TimerEventId, int);
  vtkSetMacro(TimerEventType, int);
  vtkGetMacro(TimerEventType, int);
  vtkSetMacro(TimerEventDuration, int);
  vtkGetMacro(TimerEventDuration, int);
  vtkSetMacro(TimerEventPlatformId, int);
  vtkGetMacro(TimerEventPlatformId, int);

  virtual void TerminateApp(void) {}


  virtual void SetInteractorStyle(vtkInteractorObserver *);
  vtkGetObjectMacro(InteractorStyle,vtkInteractorObserver);


  vtkSetMacro(LightFollowCamera,int);
  vtkGetMacro(LightFollowCamera,int);
  vtkBooleanMacro(LightFollowCamera,int);


  vtkSetClampMacro(DesiredUpdateRate,double,0.0001,VTK_LARGE_FLOAT);
  vtkGetMacro(DesiredUpdateRate,double);


  vtkSetClampMacro(StillUpdateRate,double,0.0001,VTK_LARGE_FLOAT);
  vtkGetMacro(StillUpdateRate,double);


  vtkGetMacro(Initialized,int);


  virtual void SetPicker(vtkAbstractPicker*);
  vtkGetObjectMacro(Picker,vtkAbstractPicker);

  virtual vtkAbstractPropPicker *CreateDefaultPicker();


  virtual void ExitCallback();
  virtual void UserCallback();
  virtual void StartPickCallback();
  virtual void EndPickCallback();
  
  virtual void GetMousePosition(int *x, int *y) { *x = 0 ; *y = 0; }


  void HideCursor();
  void ShowCursor();

  virtual void Render();


  void FlyTo(vtkRenderer *ren, double x, double y, double z);
  void FlyTo(vtkRenderer *ren, double *x)
    {this->FlyTo(ren, x[0], x[1], x[2]);}
  void FlyToImage(vtkRenderer *ren, double x, double y);
  void FlyToImage(vtkRenderer *ren, double *x)
    {this->FlyToImage(ren, x[0], x[1]);}


  vtkSetClampMacro(NumberOfFlyFrames,int,1,VTK_LARGE_INTEGER);
  vtkGetMacro(NumberOfFlyFrames,int);


  vtkSetMacro(Dolly,double);
  vtkGetMacro(Dolly,double);


  vtkGetVector2Macro(EventPosition,int);
  vtkGetVector2Macro(LastEventPosition,int);
  vtkSetVector2Macro(LastEventPosition,int);
  virtual void SetEventPosition(int x, int y)
  {
    vtkDebugMacro(<< this->GetClassName() << " (" << this 
                  << "): setting EventPosition to (" << x << "," << y << ")");
    if (this->EventPosition[0] != x || this->EventPosition[1] != y)
      {
      this->LastEventPosition[0] = this->EventPosition[0];
      this->LastEventPosition[1] = this->EventPosition[1];
      this->EventPosition[0] = x;
      this->EventPosition[1] = y;
      this->Modified();
      }
  }
  virtual void SetEventPosition(int pos[2])
  {
    this->SetEventPosition(pos[0], pos[1]);
  } 
  virtual void SetEventPositionFlipY(int x, int y)
  {
    this->SetEventPosition(x, this->Size[1] - y - 1);
  }
  virtual void SetEventPositionFlipY(int pos[2])
  {
    this->SetEventPositionFlipY(pos[0], pos[1]);
  } 
  vtkSetMacro(AltKey, int);
  vtkGetMacro(AltKey, int);
  vtkSetMacro(ControlKey, int);
  vtkGetMacro(ControlKey, int);
  vtkSetMacro(ShiftKey, int);
  vtkGetMacro(ShiftKey, int);
  vtkSetMacro(KeyCode, char);
  vtkGetMacro(KeyCode, char);
  vtkSetMacro(RepeatCount, int);
  vtkGetMacro(RepeatCount, int);
  vtkSetStringMacro(KeySym);
  vtkGetStringMacro(KeySym);


  void SetEventInformation(int x, 
                           int y, 
                           int ctrl=0, 
                           int shift=0, 
                           char keycode=0, 
                           int repeatcount=0,
                           const char* keysym=0)
    {
      this->LastEventPosition[0] = this->EventPosition[0];
      this->LastEventPosition[1] = this->EventPosition[1];
      this->EventPosition[0] = x;
      this->EventPosition[1] = y;
      this->ControlKey = ctrl;
      this->ShiftKey = shift;
      this->KeyCode = keycode;
      this->RepeatCount = repeatcount;
      if(keysym)
        {
        this->SetKeySym(keysym);
        }
      this->Modified();
    }


  void SetEventInformationFlipY(int x, 
                                int y, 
                                int ctrl=0, 
                                int shift=0, 
                                char keycode=0, 
                                int repeatcount=0,
                                const char* keysym=0)
    {
      this->SetEventInformation(x, 
                                this->Size[1] - y - 1, 
                                ctrl, 
                                shift, 
                                keycode, 
                                repeatcount, 
                                keysym);
    }


  void SetKeyEventInformation(int ctrl=0, 
                              int shift=0, 
                              char keycode=0, 
                              int repeatcount=0,
                              const char* keysym=0)
    {
      this->ControlKey = ctrl;
      this->ShiftKey = shift;
      this->KeyCode = keycode;
      this->RepeatCount = repeatcount;
      if(keysym)
        {
        this->SetKeySym(keysym);
        }
      this->Modified();
    }


  vtkSetVector2Macro(Size,int);
  vtkGetVector2Macro(Size,int);
  vtkSetVector2Macro(EventSize,int);
  vtkGetVector2Macro(EventSize,int);

  virtual vtkRenderer *FindPokedRenderer(int,int);

  vtkObserverMediator *GetObserverMediator();

protected:
  vtkRenderWindowInteractor();
  ~vtkRenderWindowInteractor();

  vtkRenderWindow       *RenderWindow;
  vtkInteractorObserver *InteractorStyle;

  // Used as a helper object to pick instances of vtkProp
  vtkAbstractPicker     *Picker;

  int    Initialized;
  int    Enabled;
  bool   EnableRender;
  int    Style;
  int    LightFollowCamera;
  int    ActorMode;
  double DesiredUpdateRate;
  double StillUpdateRate;  

  // Event information
  int   AltKey;
  int   ControlKey;
  int   ShiftKey;
  char  KeyCode;
  int   RepeatCount;
  char* KeySym; 
  int   EventPosition[2];
  int   LastEventPosition[2];
  int   EventSize[2];
  int   Size[2];
  int   TimerEventId;
  int   TimerEventType;
  int   TimerEventDuration;
  int   TimerEventPlatformId;

  // control the fly to
  int NumberOfFlyFrames;
  double Dolly;


  friend class vtkInteractorObserver;
  void GrabFocus(vtkCommand *mouseEvents, vtkCommand *keypressEvents=NULL)
    {this->Superclass::InternalGrabFocus(mouseEvents,keypressEvents);}
  void ReleaseFocus()
    {this->Superclass::InternalReleaseFocus();}
  //ETX

  vtkObserverMediator *ObserverMediator;

  // Timer related members
  //BTX
  friend struct vtkTimerStruct;
  vtkTimerIdMap *TimerMap; // An internal, PIMPLd map of timers and associated attributes
  unsigned long  TimerDuration; //in milliseconds

  virtual int InternalCreateTimer(int timerId, int timerType, unsigned long duration);
  virtual int InternalDestroyTimer(int platformTimerId);
  int GetCurrentTimerId();
  //ETX

  // Force the interactor to handle the Start() event loop, ignoring any 
  // overrides. (Overrides are registered by observing StartEvent on the 
  // interactor.)
  int HandleEventLoop;
  
private:
  vtkRenderWindowInteractor(const vtkRenderWindowInteractor&);  // Not implemented.
  void operator=(const vtkRenderWindowInteractor&);  // Not implemented.
};

#endif

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