vtkXRenderWindowInteractor.h

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

  Program:   Visualization Toolkit
  Module:    vtkXRenderWindowInteractor.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 vtkXRenderWindowInteractor_h
#define vtkXRenderWindowInteractor_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 vtkXRenderWindowInteractorInternals;

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

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

  void Initialize() override;

  void TerminateApp() override;


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


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


  void Enable() override;
  void Disable() override;

  void UpdateSize(int,int) override;


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


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

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


  friend void vtkXRenderWindowInteractorCallback(Widget,XtPointer,
                                                 XEvent *,Boolean *);
  friend void vtkXRenderWindowInteractorTimer(XtPointer,XtIntervalId *);

protected:
  vtkXRenderWindowInteractor();
  ~vtkXRenderWindowInteractor() override;

  //Using static here to avoid destroying 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;
  vtkXRenderWindowInteractorInternals* Internal;


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

  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;

  void StartEventLoop() override;

private:
  vtkXRenderWindowInteractor(const vtkXRenderWindowInteractor&) = delete;
  void operator=(const vtkXRenderWindowInteractor&) = delete;
};

#endif