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//
// $Id: G4OpenGLStoredQtViewer.cc,v 1.30 2010/06/04 15:27:47 lgarnier Exp $
// GEANT4 tag $Name:  $
//
//
// Class G4OpenGLStoredQtViewer : a class derived from G4OpenGLQtViewer and
//                                G4OpenGLStoredViewer.

#ifdef G4VIS_BUILD_OPENGLQT_DRIVER

#include "G4OpenGLStoredQtViewer.hh"

#include "G4ios.hh"

G4OpenGLStoredQtViewer::G4OpenGLStoredQtViewer
(G4OpenGLStoredSceneHandler& sceneHandler,
 const G4String&  name):
  G4VViewer (sceneHandler, sceneHandler.IncrementViewCount (), name),
  G4OpenGLViewer (sceneHandler),
  G4OpenGLQtViewer (sceneHandler),
  G4OpenGLStoredViewer (sceneHandler),             // FIXME : gerer le pb du parent !
  QGLWidget()
{

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

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

G4OpenGLStoredQtViewer::~G4OpenGLStoredQtViewer() {
  makeCurrent();
  // this is connect to the Dialog for deleting it properly
  // when close event.
  //   ((QDialog*)window())->reject();
}

void G4OpenGLStoredQtViewer::Initialise() {
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredQtViewer::Initialise 1\n");
#endif
  fReadyToPaint = false;
  CreateMainWindow (this,QString(GetName()));
  CreateFontLists ();
  
  fReadyToPaint = true;
}

void G4OpenGLStoredQtViewer::initializeGL () {

  InitializeGLView ();

#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredQtViewer::InitialiseGL () 1\n");
#endif

  // clear the buffers and window.
  ClearView ();
  FinishView ();
   
  glDepthFunc (GL_LEQUAL);
  glDepthMask (GL_TRUE);

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

#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredQtViewer::InitialiseGL  END\n");
#endif
}


void G4OpenGLStoredQtViewer::DrawView () {  
  updateQWidget();
}

void G4OpenGLStoredQtViewer::ComputeView () {

#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredQtViewer::ComputeView %d %d   VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV\n",getWinWidth(), getWinHeight());
#endif
  makeCurrent();
  G4ViewParameters::DrawingStyle style = GetViewParameters().GetDrawingStyle();

  //Make sure current viewer is attached and clean...

  //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) {
    KernelVisitDecision ();
  }
  G4bool kernelVisitWasNeeded = fNeedKernelVisit; // Keep (ProcessView resets).
  ProcessView ();
   

  if(style!=G4ViewParameters::hlr &&
     haloing_enabled) {
#ifdef G4DEBUG_VIS_OGL
    printf("G4OpenGLStoredQtViewer::ComputeView DANS LE IF\n");
#endif

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

    HaloingSecondPass ();

    DrawDisplayLists ();
    FinishView ();

  } else {
     
    // If kernel visit was needed, drawing and FinishView will already
    // have been done, so...
    if (!kernelVisitWasNeeded) {
#ifdef G4DEBUG_VIS_OGL
      printf("**************************  G4OpenGLStoredQtViewer::ComputeView Don't need kernel Visit \n");
#endif
      DrawDisplayLists ();
      FinishView ();
    } else {
#ifdef G4DEBUG_VIS_OGL
      printf("**************************  G4OpenGLStoredQtViewer::ComputeView need kernel Visit \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 G4DEBUG_VIS_OGL
        printf("***************************  CASE 4 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n");
#endif
      } else { // ADD TO AVOID KernelVisit=1 and nothing to display
        DrawDisplayLists ();
        FinishView ();
      }
    }
  }

  if (isRecording()) {
    savePPMToTemp();
  }

#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredQtViewer::ComputeView %d %d ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n",getWinWidth(), getWinHeight());
#endif
  fHasToRepaint = true;
}


/**
   - Lors du resize de la fenetre, on doit non pas redessiner le detecteur, mais aussi les evenements
*/
void G4OpenGLStoredQtViewer::resizeGL(
                                      int aWidth
                                      ,int aHeight)
{  
  // Set new size, it will be update when next Repaint()->SetView() called
  if ((aWidth > 0) && (aHeight > 0)) {
    ResizeWindow(aWidth,aHeight);
    fHasToRepaint = sizeHasChanged();
  }
}


// We have to get several case :
// - Only activate the windows (mouse click for example) -> Do not redraw
// - resize window -> redraw
// - try to avoid recompute everything if we do not rescale picture (side is the same)
 
void G4OpenGLStoredQtViewer::paintGL()
{
  if (fIsRepainting) {
    return ;
  }
  fIsRepainting = true;
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredQtViewer::paintGL ready:%d fHasTo:%d??\n",fReadyToPaint,fHasToRepaint);
#endif
  if (!fReadyToPaint) {
    fReadyToPaint= true;
    return;
  }
  // DO NOT RESIZE IF SIZE HAS NOT CHANGE :
  //    WHEN CLICK ON THE FRAME FOR EXAMPLE
  //    EXECEPT WHEN MOUSE MOVE EVENT
  if ( !fHasToRepaint) {
#if QT_VERSION < 0x040000
    if (((getWinWidth() == (unsigned int)width())) &&(getWinHeight() == (unsigned int) height())) { 
#else
    // L. Garnier : Trap to get the size with mac OSX 10.6 and Qt 4.6(devel)
    // Tested on Qt4.5 on mac, 4.4 on windows, 4.5 on unbuntu
    int sw = 0;
    int sh = 0;
    if (!isMaximized() && !isFullScreen()) {
      sw = normalGeometry().width();
      sh = normalGeometry().height();
    } else {
      sw = frameGeometry().width();
      sh = frameGeometry().height();
    }
    if ((getWinWidth() == (unsigned int)sw) &&(getWinHeight() == (unsigned int)sh)) {
#endif
      return;
    }
  }
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredQtViewer::paintGL VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV ready %d\n",fReadyToPaint);
#endif

  SetView();

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

  fHasToRepaint = false;

#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredQtViewer::paintGL ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ready %d\n",fReadyToPaint);
#endif
  fIsRepainting = false;
}

void G4OpenGLStoredQtViewer::paintEvent(QPaintEvent *event) {
  if ( fHasToRepaint) {
    updateGL();
  }
}

void G4OpenGLStoredQtViewer::mousePressEvent(QMouseEvent *event)
{
  G4MousePressEvent(event);
}

void G4OpenGLStoredQtViewer::keyPressEvent (QKeyEvent * event) 
{
  G4keyPressEvent(event);
}

void G4OpenGLStoredQtViewer::wheelEvent (QWheelEvent * event) 
{
  G4wheelEvent(event);
}

void G4OpenGLStoredQtViewer::showEvent (QShowEvent * event) 
{
  fHasToRepaint = true;
}

/**
 * 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 *)
{
  G4MouseDoubleClickEvent();
}

void G4OpenGLStoredQtViewer::mouseReleaseEvent(QMouseEvent *)
{
  G4MouseReleaseEvent();
}

void G4OpenGLStoredQtViewer::mouseMoveEvent(QMouseEvent *event)
{
  G4MouseMoveEvent(event);
}


void G4OpenGLStoredQtViewer::contextMenuEvent(QContextMenuEvent *e)
{
  G4manageContextMenuEvent(e);
}

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

void G4OpenGLStoredQtViewer::ShowView (
) 
//////////////////////////////////////////////////////////////////////////////
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!//
{
#if QT_VERSION < 0x040000
  setActiveWindow();
#else
  activateWindow();
#endif
}

#endif