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//
//
// $Id: G4OpenGLImmediateQtViewer.cc,v 1.14 2009/05/13 10:28:00 lgarnier Exp $
// GEANT4 tag $Name:  $
//
//
// Class G4OpenGLImmediateQtViewer : a class derived from G4OpenGLQtViewer and
//                                G4OpenGLImmediateViewer.

#ifdef G4VIS_BUILD_OPENGLQT_DRIVER
#define QT_STORE_46_DBG 1

#include "G4VViewer.hh"
#include "G4OpenGLImmediateQtViewer.hh"
#include "G4OpenGLImmediateSceneHandler.hh"

#include "G4ios.hh"

G4OpenGLImmediateQtViewer::G4OpenGLImmediateQtViewer
(G4OpenGLImmediateSceneHandler& sceneHandler,
 const G4String&  name):
  G4VViewer (sceneHandler, sceneHandler.IncrementViewCount (), name),
  G4OpenGLViewer (sceneHandler),
  G4OpenGLQtViewer (sceneHandler),
  G4OpenGLImmediateViewer (sceneHandler)
{

#if QT_VERSION < 0x040000
  setFocusPolicy(QWidget::StrongFocus); // enable keybord events
#else
  setFocusPolicy(Qt::StrongFocus); // enable keybord events
#endif
  fHasToRepaint =false;

  if (fViewId < 0) return;  // In case error in base class instantiation.
}

G4OpenGLImmediateQtViewer::~G4OpenGLImmediateQtViewer() {
  makeCurrent();
}

void G4OpenGLImmediateQtViewer::Initialise() {
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::Initialise \n");
#endif
  fReadyToPaint = false;
  CreateMainWindow (this,QString(fName));
  CreateFontLists ();

  fReadyToPaint = true;
}

#ifdef QT_STORE_46_DBG
void G4OpenGLImmediateQtViewer::initializeGL () {
  glShadeModel(GL_SMOOTH);							// Enable Smooth Shading
  glClearColor(0.0f, 0.0f, 0.0f, 0.5f);				// Black Background
  glClearDepth(1.0f);									// Depth Buffer Setup
  glEnable(GL_DEPTH_TEST);							// Enables Depth Testing
  glDepthFunc(GL_LEQUAL);								// The Type Of Depth Testing To Do
  glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);	// Really Nice Perspective Calculations
 

 return;										// Initialization Went OK

  
 }
#else
void G4OpenGLImmediateQtViewer::initializeGL () {

  InitializeGLView ();


  // If a double buffer context has been forced upon us, ignore the
  // back buffer for this OpenGLImmediate view.
  //   glDrawBuffer (GL_FRONT); // FIXME : Ne marche pas avec cette ligne, mais affiche le run correctement...
  // clear the buffers and window.
  ClearView ();
  FinishView ();

  glDepthFunc (GL_LEQUAL);
  glDepthMask (GL_TRUE);

  if (fSceneHandler.GetScene() == 0) {
    fHasToRepaint =false;
  } else {
    fHasToRepaint =true;
  }

}
#endif

/** To ensure compatibility with DrawView method
 */
void  G4OpenGLImmediateQtViewer::DrawView() {
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::DrawView  VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV\n");
#endif
  // That's no the same logic as Stored Viewer, I don't know why...
  // see G4OpenGLStoredQtViewer::DrawView for more informations

  updateQWidget();
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::DrawView  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n");
#endif
}


#ifdef QT_STORE_46_DBG
void G4OpenGLImmediateQtViewer::ComputeView () {
 }
#else
void G4OpenGLImmediateQtViewer::ComputeView () {

#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::ComputeView %d %d   VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV\n",getWinWidth(), getWinHeight());
#endif
  makeCurrent();
  // If a double buffer context has been forced upon us, ignore the
  // back buffer for this OpenGLImmediate view.
  //  glDrawBuffer (GL_FRONT);

  G4ViewParameters::DrawingStyle style = GetViewParameters().GetDrawingStyle();

  if(style!=G4ViewParameters::hlr &&
     haloing_enabled) {

    HaloingFirstPass ();
    NeedKernelVisit ();
    ProcessView ();
    glFlush ();
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::ComputeView First ProcessView ok\n");
#endif
    HaloingSecondPass ();

  }

  NeedKernelVisit ();  // Always need to visit G4 kernel.
  ProcessView ();

  if (isRecording()) {
    savePPMToTemp();
  }
   
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::ComputeView %d %d ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n",getWinWidth(), getWinHeight());
#endif
  fHasToRepaint = true;
}
#endif

void G4OpenGLImmediateQtViewer::FinishView()
{
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::FinishView() BEGIN\n");
#endif
  glFlush ();
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::FinishView() END\n");
#endif

}


/**
   - Lors du resize de la fenetre, on doit non pas redessiner le detecteur, mais aussi les evenements
*/
#ifdef QT_STORE_46_DBG
void G4OpenGLImmediateQtViewer::resizeGL(
                                      int width
                                      ,int height)
{  
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::resizeGL\n");
#endif
  if (height==0)										// Prevent A Divide By Zero By
    {
      height=1;										// Making Height Equal One
    }
  
  glViewport(0,0,width,height);						// Reset The Current Viewport
  
  glMatrixMode(GL_PROJECTION);						// Select The Projection Matrix
  glLoadIdentity();									// Reset The Projection Matrix
  
  // Calculate The Aspect Ratio Of The Window
  gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);
  
  glMatrixMode(GL_MODELVIEW);							// Select The Modelview Matrix
  glLoadIdentity();									// Reset The Modelview Matrix
  
}
#else
void G4OpenGLImmediateQtViewer::resizeGL(
 int aWidth
,int aHeight)
{  
  ResizeWindow(aWidth,aHeight);
  fHasToRepaint = sizeHasChanged();
}
#endif


#ifdef QT_STORE_46_DBG
void G4OpenGLImmediateQtViewer::paintGL()
{
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::paintGL\n");
#endif
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(1,1,1,0,0,0,0,0,1);

    glBegin(GL_QUADS);
    //carré rouge
    glColor3ub(255,0,0);
    glVertex3d(1,1,0);
    glVertex3d(1,0,0);
    glVertex3d(0,0,0);
    glVertex3d(0,1,0);
    //carré vert
    glColor3ub(0,255,0);
    glVertex3d(1,1,0);
    glVertex3d(2,1,0);
    glVertex3d(2,0,0);
    glVertex3d(1,0,0);
    //carré vert
    glColor3ub(0,255,0);
    glVertex3d(0,2,0);
    glVertex3d(1,2,0);
    glVertex3d(1,1,0);
    glVertex3d(0,1,0);
    //carré bleu
    glColor3ub(0,0,255);
    glVertex3d(2,2,0);
    glVertex3d(2,1,0);
    glVertex3d(1,1,0);
    glVertex3d(1,2,0);
    //carré bleu
    glColor3ub(0,0,255);
    glVertex3d(1,0,0);
    glVertex3d(1,1,0);
    glVertex3d(1,1,1);
    glVertex3d(1,0,1);
    //carré blanc
    glColor3ub(255,255,255);
    glVertex3d(1,1,0);
    glVertex3d(0,1,0);
    glVertex3d(0,1,1);
    glVertex3d(1,1,1);
    //carré rouge
    glColor3ub(255,0,0);
    glVertex3d(1,1,1);
    glVertex3d(1,0,1);
    glVertex3d(0,0,1);
    glVertex3d(0,1,1);
    glEnd();
}

#else
void G4OpenGLImmediateQtViewer::paintGL()
{
#ifdef G4DEBUG_VIS_OGL
  printf("\n\nG4OpenGLImmediateQtViewer::paintGL ??\n");
#endif
  if (!fReadyToPaint) {
    fReadyToPaint= true;
    return;
  }
  // DO NOT RESIZE IF SIZE HAS NOT CHANGE
  if ( !fHasToRepaint) {
    if (((getWinWidth() == (unsigned int)width())) &&(getWinHeight() == (unsigned int) height())) {
      return;
    }
  }
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::paintGL VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV ready %d\n",fReadyToPaint);
#endif

  SetView();
   
  ClearView (); //ok, put the background correct
  ComputeView();

  fHasToRepaint = false; // could be set to false by ComputeView

#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLImmediateQtViewer::paintGL ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ready %d\n\n\n",fReadyToPaint);
#endif
}
#endif


void G4OpenGLImmediateQtViewer::mousePressEvent(QMouseEvent *event)
{
  G4MousePressEvent(event);
}

void G4OpenGLImmediateQtViewer::keyPressEvent (QKeyEvent * event) 
{
  G4keyPressEvent(event);
}

void G4OpenGLImmediateQtViewer::wheelEvent (QWheelEvent * event) 
{
  G4wheelEvent(event);
}

/**
 * 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 G4OpenGLImmediateQtViewer::mouseDoubleClickEvent(QMouseEvent *)
{
  G4MouseDoubleClickEvent();
}

void G4OpenGLImmediateQtViewer::mouseReleaseEvent(QMouseEvent *)
{
  G4MouseReleaseEvent();
}

void G4OpenGLImmediateQtViewer::mouseMoveEvent(QMouseEvent *event)
{
  G4MouseMoveEvent(event);
}


void G4OpenGLImmediateQtViewer::contextMenuEvent(QContextMenuEvent *e)
{
  G4manageContextMenuEvent(e);
}

void G4OpenGLImmediateQtViewer::updateQWidget() {
  fHasToRepaint= true;
  updateGL();
  fHasToRepaint= false;
}


void G4OpenGLImmediateQtViewer::ShowView (
) 
//////////////////////////////////////////////////////////////////////////////
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!//
{
#if QT_VERSION < 0x040000
  setActiveWindow();
#else
  activateWindow();
#endif
}
#endif