//
// ********************************************************************
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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()                      // FIXME : gerer le pb du parent !
 {
   zoomAction = false;
   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
  ShowView();
  FinishView();
}

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 (zoomAction) {
     QPainter painter;
     painter.begin(this);
     //     painter.setRenderHint(QPainter::Antialiasing);
     QColor bg = QColor(glBufferImage.pixel(0,0));
     printf("%d+%d+%d+%d %d+%d+%d+%d",bg.red(),bg.green(),bg.blue(),bg.alpha(),qAlpha(glBufferImage.pixel(0,0)),qRed(glBufferImage.pixel(0,0)),qGreen(glBufferImage.pixel(0,0)),qBlue(glBufferImage.pixel(0,0)));
     painter.setBackground(QBrush(bg));
     //     painter.drawRect(10,10,50,80);
//      QImage test = grabFrameBuffer().copy();
//      painter.drawImage(0, 0,test);
     for (int ay=0;ay<glBufferImage.height();ay++) {
       for (int ax=0;ax<glBufferImage.width();ax++) {
         if(QColor(glBufferImage.pixel(ax,ay)) != bg) {
//            painter.setPen(QColor(glBufferImage.pixel(ax,ay)));
//            painter.drawPoint(ax,glBufferImage.height()-ay);
         } else {
           printf("o");
         }
         //          printf("%d+%d+%d+%d ",QColor(glBufferImage.pixel(ax,ay)).red(),QColor(glBufferImage.pixel(ax,ay)).green(),QColor(glBufferImage.pixel(ax,ay)).blue(),QColor(glBufferImage.pixel(ax,ay)).alpha());
//          if (glBufferImage.pixel(ax,ay) == 255) {
//            test.setPixel(ax,ay,1);
//          } else {
//            test.setPixel(ax,ay,0);
//          }
       }
       //       printf("\n");
     }
//      for (int ay=0;ay<test.height();ay++) {
//        for (int ax=0;ax<test.width();ax++) {
//          if (test.pixel(ax,ay) == 1) {
//            printf(".");
//          } else if (!test.pixel(ax,ay)) {
//            printf("X");
//          } else {
//            printf("%d",test.pixel(ax,ay));
//          }
//        }
//        printf("\n");
//      }
     
     //     painter.drawImage(0, 0, glBufferImage);
     //     painter.drawImage(0, 0, test,0,0,-1,-1,Qt::ColorOnly);
     
     printf("paint event zoom \n");
     //     painter.drawRect(beginZoom.x(),beginZoom.y(),endZoom.x()-beginZoom.x(),endZoom.y()-beginZoom.y());
     painter.end();
   } else {
     
     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());
}

void G4OpenGLStoredQtViewer::mouseDoubleClickEvent(QMouseEvent *event)
{
#ifdef GEANT4_QT_DEBUG
  printf("G4OpenGLStoredQtViewer::mouseDoubleClickEvent\n");
#endif
  setMouseTracking(true);
  zoomAction=true;
  makeCurrent();
  glBufferImage = QImage( width(), height(), QImage::Format_ARGB32_Premultiplied );
  glReadPixels( 0, 0, width(), height(), GL_RGBA, GL_UNSIGNED_BYTE, glBufferImage.bits() );
  //  glBufferImage = grabFrameBuffer(false).convertToFormat(QImage::Format_RGB16); //QImage::Format_ARGB32_Premultiplied
  
#ifdef GEANT4_QT_DEBUG
//   for (int ay=0;ay<glBufferImage.height();ay++) {
//     for (int ax=0;ax<glBufferImage.width();ax++) {
//       if (glBufferImage.pixel(ax,ay) == 255) {
//         printf(".");
//       } else if (!glBufferImage.pixel(ax,ay)) {
//         printf("X");
//       } else {
//         printf("%d",glBufferImage.pixel(ax,ay));
//       }
//     }
//     printf("\n");
//   }
#endif
  beginZoom.setX(event->x());
  beginZoom.setY(event->y());
}

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

void G4OpenGLStoredQtViewer::mouseMoveEvent(QMouseEvent *event)
{
  // special case of mouse zoom action, it should draw a rect on
  // the openGL buffer, so it could only be done in this class
  // and sould be reimplemented in G4OpenGLImmediateQtViewer
  if (!zoomAction) {
#if QT_VERSION < 0x040000
    G4MouseMoveEvent(event->x(),event->y(),event->state());
#else
    G4MouseMoveEvent(event->x(),event->y(),event->buttons());
#endif
  } else {
#ifdef GEANT4_QT_DEBUG
    printf("G4OpenGLStoredQtViewer::mouseMoveEvent zoom\n");
#endif
    endZoom.setX(event->x());
    endZoom.setY(event->y());
    updateGL();
  }
  //  DrawView();
}


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