//
// ********************************************************************
// * License and Disclaimer                                           *
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//
//
// $Id: G4OpenGLStoredQtViewer.cc,v 1.6 2007/11/15 18:24:28 lgarnier Exp $
// GEANT4 tag $Name:  $
//
//
// Class G4OpenGLStoredQtViewer : a class derived from G4OpenGLQtViewer and
//                                G4OpenGLStoredViewer.

#ifdef G4VIS_BUILD_OPENGLQT_DRIVER

#define GEANT4_QT_DEBUG

#include "G4OpenGLStoredQtViewer.hh"
#include "G4VisManager.hh"

#include "G4ios.hh"

//#include <qmouseevent.h>
#include <qevent.h> // include <qcontextmenuevent.h>
#include <qpainter.h>

G4OpenGLStoredQtViewer::G4OpenGLStoredQtViewer
(G4OpenGLStoredSceneHandler& sceneHandler,
 const G4String&  name):
 G4VViewer (sceneHandler, sceneHandler.IncrementViewCount (), name),
 G4OpenGLViewer (sceneHandler),
 G4OpenGLQtViewer (sceneHandler),
 G4OpenGLStoredViewer (sceneHandler),
 QGLWidget(QGLFormat(QGL::SampleBuffers))             // FIXME : gerer le pb du parent !
 {
   nbPaint =0;
   hasToRepaint =false;
  if (fViewId < 0) return;  // In case error in base class instantiation.
}

G4OpenGLStoredQtViewer::~G4OpenGLStoredQtViewer() {
#ifdef GEANT4_QT_DEBUG
   printf("GLWidget::~GLWidget \n");
#endif
   makeCurrent();
   // this is connect to the Dialog for deleting it properly
   // when close event.
   //   ((QDialog*)window())->reject();
#ifdef GEANT4_QT_DEBUG
   printf("GLWidget::~GLWidget END\n");
#endif
}

void G4OpenGLStoredQtViewer::Initialise() {
#ifdef GEANT4_QT_DEBUG
   printf("GLWidget::Initialise \n");
#endif
   readyToPaint = false;
   CreateGLQtContext ();
#ifdef GEANT4_QT_DEBUG
   printf("G4OpenGLStoredQtViewer::Initialise () 2\n");
#endif
  CreateMainWindow (this);
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::Initialise () 3\n");
#endif
  //  CreateFontLists ();  // FIXME Does nothing!
  
#ifdef GEANT4_QT_DEBUG
  printf("readyToPaint = true \n");
#endif
  readyToPaint = true;
  
  // First Draw
  SetView();
#ifdef GEANT4_QT_DEBUG
  printf("    ClearView\n");
#endif
  ClearView (); //ok, put the background correct
  FinishView();
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::Initialise () 4\n");
#endif
}

void G4OpenGLStoredQtViewer::initializeGL () {

   InitializeGLView ();

#ifdef GEANT4_QT_DEBUG
   printf("G4OpenGLStoredQtViewer::InitialiseGL () 1\n");
#endif

   // clear the buffers and window.
   ClearView ();
   //   printf("G4OpenGLStoredQtViewer::InitialiseGL () 2\n");
   FinishView ();
   
   glDepthFunc (GL_LEQUAL);
   glDepthMask (GL_TRUE);

   hasToRepaint =true;

#ifdef GEANT4_QT_DEBUG
   printf("G4OpenGLStoredQtViewer::InitialiseGL  -------------------------------------------------------------------------------------\n");
#endif
}


void G4OpenGLStoredQtViewer::DrawView () {
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::DrawView %d %d   VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV\n",WinSize_x, WinSize_y);
#endif
   G4ViewParameters::DrawingStyle style = GetViewParameters().GetDrawingStyle();

   //Make sure current viewer is attached and clean...
   //Qt version needed
   //   glViewport (0, 0, WinSize_x, WinSize_y);

   //See if things have changed from last time and remake if necessary...
   // The fNeedKernelVisit flag might have been set by the user in
   // /vis/viewer/rebuild, but if not, make decision and set flag only
   // if necessary...
   if (!fNeedKernelVisit) 

   if (!fNeedKernelVisit) KernelVisitDecision ();
   
   G4bool kernelVisitWasNeeded = fNeedKernelVisit; // Keep (ProcessView resets).
   ProcessView ();
   

   if(style!=G4ViewParameters::hlr &&
      haloing_enabled) {
#ifdef GEANT4_QT_DEBUG
     printf("G4OpenGLStoredQtViewer::DrawView DANS LE IF\n");
#endif

     HaloingFirstPass ();
     DrawDisplayLists ();
     glFlush ();

     HaloingSecondPass ();

     DrawDisplayLists ();
     FinishView ();

   } else {
#ifdef GEANT4_QT_DEBUG
     printf("***************************  CASE 1 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n");
#endif
     
     // If kernel visit was needed, drawing and FinishView will already
     // have been done, so...
     if (!kernelVisitWasNeeded) {
#ifdef GEANT4_QT_DEBUG
       printf("***************************  CASE 2 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n");
#endif
       DrawDisplayLists ();
       FinishView ();
     } else {
#ifdef GEANT4_QT_DEBUG
       printf("***************************  CASE 3 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n");
#endif
       // However, union cutaways are implemented in DrawDisplayLists, so make
       // an extra pass...
       if (fVP.IsCutaway() &&
           fVP.GetCutawayMode() == G4ViewParameters::cutawayUnion) {
         ClearView();
         DrawDisplayLists ();
         FinishView ();
#ifdef GEANT4_QT_DEBUG
         printf("***************************  CASE 4 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n");
#endif
       } else { // ADD TO AVOID KernelVisit=1 and nothing to display
         DrawDisplayLists ();
         FinishView ();
       }
     }
   }

#ifdef GEANT4_QT_DEBUG
   printf("G4OpenGLStoredQtViewer::DrawView %d %d ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n",WinSize_x, WinSize_y);
#endif
   hasToRepaint =true;
}


//////////////////////////////////////////////////////////////////////////////
void G4OpenGLStoredQtViewer::FinishView (
) 
//////////////////////////////////////////////////////////////////////////////
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!//
{
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::FinishView VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV\n");
#endif

  glFlush ();
  swapBuffers ();
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::FinishView ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n");
#endif

}


/**
 - Lors du resize de la fenetre, on doit non pas redessiner le detecteur, mais aussi les evenements
 */
void G4OpenGLStoredQtViewer::resizeGL(
 int aWidth
,int aHeight)
{  
  setupViewport(aWidth,aHeight);

//   glViewport(0, 0, aWidth, aHeight);
//   glMatrixMode(GL_PROJECTION);
//   glMatrixMode(GL_MODELVIEW);

   if (((WinSize_x != (G4int)aWidth)) || (WinSize_y != (G4int) aHeight)) {
     hasToRepaint =true;
   }
   WinSize_x = (G4int) aWidth;
   WinSize_y = (G4int) aHeight;

#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::resizeGL ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ %d %d=%d %d=%d\n",hasToRepaint,width(),aWidth,height(),aHeight);
#endif
}


/** 
@see :
*/

void G4OpenGLStoredQtViewer::paintGL()
 {
     
     if (!readyToPaint) {
#ifdef GEANT4_QT_DEBUG
       printf("G4OpenGLStoredQtViewer::paintGL ============  Not ready %d\n",readyToPaint);
#endif
       readyToPaint= true;
       return;
     }
     // DO NOT RESIZE IF SIZE HAS NOT CHANGE :
     //    WHEN CLICK ON THE FRAME FOR EXAMPLE
     //    EXECEPT WHEN MOUSE MOVE EVENT
     if ( !hasToRepaint) {
       if (((WinSize_x == (G4int)width())) &&(WinSize_y == (G4int) height())) {
#ifdef GEANT4_QT_DEBUG
         printf("G4OpenGLStoredQtViewer::paintGL ============  Dont repaint\n");
#endif
         return;
       }
     }
     nbPaint++;
#ifdef GEANT4_QT_DEBUG
     printf("G4OpenGLStoredQtViewer::paintGL VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV %d ready %d\n",nbPaint,readyToPaint);
#endif
     WinSize_x = (G4int) width();
     WinSize_y = (G4int) height();
     
     setupViewport(width(),height());
     //     glViewport (0, 0, width(), height());
     //   glLoadIdentity();
     
     
     SetView();
     
     //   //  printf("before ClearView\n");
#ifdef GEANT4_QT_DEBUG
     printf("    ClearView\n");
#endif
     
     ClearView (); //ok, put the background correct
     DrawView();
     
     hasToRepaint =false;
     
#ifdef GEANT4_QT_DEBUG
     printf("G4OpenGLStoredQtViewer::paintGL ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ %d ready %d\n",nbPaint,readyToPaint);
#endif
 }

void G4OpenGLStoredQtViewer::mousePressEvent(QMouseEvent *event)
{
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::mousePressEvent\n");
#endif
  setMouseTracking(true);
  G4MousePressEvent(event->pos());
}

/**
 * This function was build in order to make a zoom on double clic event.
 * It was think to build a rubberband on the zoom area, but never work fine
 */
void G4OpenGLStoredQtViewer::mouseDoubleClickEvent(QMouseEvent *event)
{
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::mouseDoubleClickEvent\n");
#endif
//   setMouseTracking(true);
//   glBufferImage = grabFrameBuffer().convertToFormat(QImage::Format_ARGB32);//_Premultiplied);  
}

void G4OpenGLStoredQtViewer::mouseReleaseEvent(QMouseEvent *event)
{
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::mouseReleaseEvent\n");
#endif
//   setMouseTracking(false);
}

void G4OpenGLStoredQtViewer::mouseMoveEvent(QMouseEvent *event)
{

#if QT_VERSION < 0x040000
    G4MouseMoveEvent(event->x(),event->y(),event->state());
#else
    G4MouseMoveEvent(event->x(),event->y(),event->buttons());
#endif
}


void G4OpenGLStoredQtViewer::contextMenuEvent(QContextMenuEvent *e)
{
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::contextMenuEvent\n");
#endif
  manageContextMenuEvent(e);
}

void G4OpenGLStoredQtViewer::updateQWidget() {
  hasToRepaint= true;
  updateGL();
  hasToRepaint= false;
}


#endif