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

  Program:   Visualization Toolkit
  Module:    vtkXOpenGLRenderWindowInteractor.h

  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 vtkXOpenGLRenderWindowInteractor_h
#define vtkXOpenGLRenderWindowInteractor_h

//===========================================================
// now we define the C++ class

#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkRenderWindowInteractor.h"
#include <X11/StringDefs.h> // Needed for X types in the public interface
#include <X11/Intrinsic.h> // Needed for X types in the public interface

class vtkCallbackCommand;
class vtkXOpenGLRenderWindowInteractorInternals;

// Forward declare internal friend functions.
void VTKRENDERINGOPENGL2_EXPORT vtkXOpenGLRenderWindowInteractorCallback(Widget,XtPointer, XEvent *,Boolean *);
void VTKRENDERINGOPENGL2_EXPORT vtkXOpenGLRenderWindowInteractorTimer(XtPointer,XtIntervalId *);

class VTKRENDERINGOPENGL2_EXPORT vtkXOpenGLRenderWindowInteractor : public vtkRenderWindowInteractor
{
public:
  static vtkXOpenGLRenderWindowInteractor *New();
  vtkTypeMacro(vtkXOpenGLRenderWindowInteractor,vtkRenderWindowInteractor);
  void PrintSelf(ostream& os, vtkIndent indent);

  virtual void Initialize();

  void TerminateApp();


  vtkGetMacro(BreakLoopFlag, int);
  void SetBreakLoopFlag(int);
  void BreakLoopFlagOff();
  void BreakLoopFlagOn();


  virtual void Initialize(XtAppContext app);
  vtkGetMacro( App, XtAppContext );


  virtual void Enable();
  virtual void Disable();

  virtual void UpdateSize(int,int);


  virtual void SetWidget(Widget);
  Widget GetWidget() {return this->Top;};


  virtual void SetTopLevelShell(Widget);
  Widget GetTopLevelShell() {return this->TopLevelShell;};

  virtual void GetMousePosition(int *x, int *y);


  friend void vtkXOpenGLRenderWindowInteractorCallback(Widget,XtPointer,
                                                 XEvent *,Boolean *);
  friend void vtkXOpenGLRenderWindowInteractorTimer(XtPointer,XtIntervalId *);

protected:
  vtkXOpenGLRenderWindowInteractor();
  ~vtkXOpenGLRenderWindowInteractor();

  //Using static here to avoid detroying context when many apps are open:
  static XtAppContext App;
  static int NumAppInitialized;

  Display *DisplayId;
  Window WindowId;
  Atom KillAtom;
  Widget Top;
  int OwnTop;
  int OwnApp;
  int PositionBeforeStereo[2];
  Widget TopLevelShell;
  int TimerId;
  vtkXOpenGLRenderWindowInteractorInternals* Internal;


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

  XtIntervalId AddTimeOut(XtAppContext app_context, unsigned long interval,
                          XtTimerCallbackProc proc, XtPointer client_data) ;
  void Timer(XtPointer client_data, XtIntervalId *id);
  void Callback(Widget w, XtPointer client_data, XEvent *event, Boolean *ctd);

  static int BreakLoopFlag;

  virtual void StartEventLoop();

private:
  vtkXOpenGLRenderWindowInteractor(const vtkXOpenGLRenderWindowInteractor&);  // Not implemented.
  void operator=(const vtkXOpenGLRenderWindowInteractor&);  // Not implemented.
};

#endif