---

Rendering/vtkRenderWindowInteractor.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkRenderWindowInteractor.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 __vtkRenderWindowInteractor_h
#define __vtkRenderWindowInteractor_h

#include "vtkObject.h"

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

class vtkAbstractPicker;
class vtkAbstractPropPicker;
class vtkInteractorObserver;
class vtkInteractorObserver;
class vtkRenderWindow;
class vtkRenderer;

class VTK_RENDERING_EXPORT vtkRenderWindowInteractor : public vtkObject
{
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);


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

  virtual void UpdateSize(int x,int y);


  virtual int CreateTimer(int )  { return 1; };
  virtual int DestroyTimer()    { return 1; };

  virtual void TerminateApp(void) {};


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


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


  vtkSetClampMacro(DesiredUpdateRate,float,0.0001f,VTK_LARGE_FLOAT);
  vtkGetMacro(DesiredUpdateRate,float);


  vtkSetClampMacro(StillUpdateRate,float,0.0001f,VTK_LARGE_FLOAT);
  vtkGetMacro(StillUpdateRate,float);


  vtkGetMacro(Initialized,int);


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

  virtual vtkAbstractPropPicker *CreateDefaultPicker();

#ifndef VTK_REMOVE_LEGACY_CODE


  void SetStartPickMethod(void (*f)(void *), void *arg);
  void SetStartPickMethodArgDelete(void (*f)(void *));
  void SetEndPickMethod(void (*f)(void *), void *arg);
  void SetEndPickMethodArgDelete(void (*f)(void *));
  void SetUserMethod(void (*f)(void *), void *arg);
  void SetUserMethodArgDelete(void (*f)(void *));
  void SetExitMethod(void (*f)(void *), void *arg);
  void SetExitMethodArgDelete(void (*f)(void *));
#endif
  

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


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


  vtkSetMacro(Dolly,float);
  vtkGetMacro(Dolly,float);


  vtkGetVector2Macro(EventPosition,int);
  vtkGetVector2Macro(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(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);

  vtkRenderer *FindPokedRenderer(int,int);

protected:
  vtkRenderWindowInteractor();
  ~vtkRenderWindowInteractor();

  vtkRenderWindow    *RenderWindow;
  vtkInteractorObserver *InteractorStyle;

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

  int   Initialized;
  int   Enabled;
  int   Style;
  int   LightFollowCamera;
  int   ActorMode;
  float DesiredUpdateRate;
  float StillUpdateRate;  

  // Event information
  int   ControlKey;
  int   ShiftKey;
  char  KeyCode;
  int   RepeatCount;
  char* KeySym; 
  int   EventPosition[2];
  int   LastEventPosition[2];
  int   EventSize[2];
  int   Size[2];
  
  // These should be removed when the Set*Method methods that are
  // deprecated above are removed.  We don't want these inside the
  // check for VTK_REMOVE_LEGACY_CODE because it will change the size
  // of the object.
  unsigned long StartPickTag;
  unsigned long EndPickTag;
  unsigned long UserTag;
  unsigned long ExitTag;
  
  // control the fly to
  int NumberOfFlyFrames;
  float Dolly;
  
private:
  vtkRenderWindowInteractor(const vtkRenderWindowInteractor&);  // Not implemented.
  void operator=(const vtkRenderWindowInteractor&);  // Not implemented.
};

#endif

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