/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_13_patch3/src/Fireworks/Core/src/CmsAnnotation.cc

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#include <sstream>

#include "TGLIncludes.h"
#include "TGLCamera.h"
#include "TGLRnrCtx.h"
#include "TGLSelectRecord.h"
#include "TGLViewerBase.h"
#include "TGLViewer.h"
#include "TImage.h"
#include "TEveManager.h"

#include "Fireworks/Core/interface/CmsAnnotation.h"
#include "Fireworks/Core/src/FWCheckBoxIcon.h"
#include "Fireworks/Core/interface/FWConfiguration.h"

CmsAnnotation::CmsAnnotation(TGLViewerBase *parent, Float_t posx, Float_t posy) :
   TGLOverlayElement(TGLOverlayElement::kUser),
   fPosX(posx), fPosY(posy),
   fMouseX(0),  fMouseY(0),
   fDrag(kNone),
   fParent(0),
   fSize(0.2),
   fSizeDrag(0.0),
   fActive(false),
   fAllowDestroy(false)
{
   // Constructor.
   // Create annotation as plain text

   parent->AddOverlayElement(this);
   fParent = (TGLViewer*)parent;
}


CmsAnnotation::~CmsAnnotation()
{
   // Destructor.

   fParent->RemoveOverlayElement(this);
}


void
CmsAnnotation::Render(TGLRnrCtx& rnrCtx)
{ 
   if (rnrCtx.GetCamera()->RefViewport().Width() == 0 || 
       rnrCtx.GetCamera()->RefViewport().Height() == 0 ) return;
   
   static UInt_t ttid_black = 0;
   static UInt_t ttid_white = 0;
     
   bool whiteBg = rnrCtx.ColorSet().Background().GetColorIndex() == kWhite;
   UInt_t& ttid = whiteBg ? ttid_white : ttid_black;

   if ( (whiteBg == false && ttid == 0) || (whiteBg && ttid == 0))
   {
      TImage* imgs[3];
      TString base =   whiteBg ? "White" : "Black";  
      imgs[0] = TImage::Open(FWCheckBoxIcon::coreIcondir()+"CMSLogo" + base + "Bg.png");
      imgs[1] = TImage::Open(FWCheckBoxIcon::coreIcondir()+"CMSLogo" + base + "BgM.png");
      imgs[2] = TImage::Open(FWCheckBoxIcon::coreIcondir()+"CMSLogo" + base + "BgS.png");

      glGenTextures(1, &ttid);
      glBindTexture(GL_TEXTURE_2D, ttid);
      
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL,0);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 2);
      
      
      glPixelStorei(GL_UNPACK_ALIGNMENT,  1);
      glPixelStorei(GL_UNPACK_SWAP_BYTES, 1);
      
      for (int i=0; i < 3; i++)
         glTexImage2D(GL_TEXTURE_2D, i, GL_RGBA, imgs[i]->GetWidth(), imgs[i]->GetHeight(), 0,
                      GL_BGRA, GL_UNSIGNED_BYTE, imgs[i]->GetArgbArray()); 
      
      glPixelStorei(GL_UNPACK_SWAP_BYTES, 0);
     
      for (int i=0; i < 3; i++)
         delete imgs[i];
   }

   glPushAttrib(GL_ENABLE_BIT | GL_LINE_BIT | GL_POLYGON_BIT );
   TGLCapabilitySwitch lights_off(GL_LIGHTING, kFALSE);


   // reset matrix
   glMatrixMode(GL_PROJECTION);
   glPushMatrix();
   glLoadIdentity();

   if (rnrCtx.Selection())
   {
      TGLRect rect(*rnrCtx.GetPickRectangle());
      rnrCtx.GetCamera()->WindowToViewport(rect);
      gluPickMatrix(rect.X(), rect.Y(), rect.Width(), rect.Height(),
                    (Int_t*) rnrCtx.GetCamera()->RefViewport().CArr());
   }
   const TGLRect& vp = rnrCtx.RefCamera().RefViewport();
   glOrtho(vp.X(), vp.Width(), vp.Y(), vp.Height(), 0, 1);
   glMatrixMode(GL_MODELVIEW);
   glPushMatrix();
   glLoadIdentity();

   // move to pos
   Float_t posX = vp.Width()  * fPosX;
   Float_t posY = vp.Height() * fPosY;
   glTranslatef(posX, posY, -0.99);

   glDisable(GL_DEPTH_TEST);
   glEnable(GL_BLEND);
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

   glEnable(GL_TEXTURE_2D);
   glBindTexture(GL_TEXTURE_2D, ttid);

   glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

   // logo
   glPushName(kMove);
   TGLUtil::Color(rnrCtx.ColorSet().Background().GetColorIndex());
   glBegin(GL_QUADS);
   Float_t z =  0.9;
   Float_t a = fSize * vp.Height();
   glTexCoord2f(0, 1); glVertex3f( 0, -a, z);
   glTexCoord2f(1, 1); glVertex3f( a, -a, z);
   glTexCoord2f(1, 0); glVertex3f( a,  0, z);
   glTexCoord2f(0, 0); glVertex3f( 0,  0, z);  
   glEnd();
   glPopName();


   glDisable(GL_TEXTURE_2D);

   if (fActive)
   {
      // resize button
      glPushMatrix();
      glBegin(GL_QUADS);
      Float_t a = fSize * vp.Height();
      TGLUtil::ColorTransparency(rnrCtx.ColorSet().Markup().GetColorIndex(), 95);
      glTexCoord2f(0, 1); glVertex3f( 0, -a, z);
      glTexCoord2f(1, 1); glVertex3f( a, -a, z);
      glTexCoord2f(1, 0); glVertex3f( a,  0, z);
      glTexCoord2f(0, 0); glVertex3f( 0,  0, z);  
      glEnd();

      glTranslatef(a, -a, 0);
      a *= 0.2;
      z = 0.95;
      glPushName(kResize);
      TGLUtil::ColorTransparency(rnrCtx.ColorSet().Markup().GetColorIndex(), 100);
      glBegin(GL_QUADS);
      glVertex3f( 0, 0, z);
      glVertex3f( 0, a, z);
      glVertex3f(-a, a, z);
      glVertex3f(-a, 0, z);
      glEnd();
      {
         glTranslatef(-a/3, a/3, 0);
         glBegin(GL_LINES);
         TGLUtil::ColorTransparency(rnrCtx.ColorSet().Markup().GetColorIndex(), 40);
         Float_t s = a / 3;
         glVertex3f( 0, 0, z); glVertex3f( 0, s, z);
         glVertex3f( 0, 0, z); glVertex3f( -s, 0, z);
         glEnd();
      }
      glPopName();
      glPopMatrix();

      // delete
      if (fAllowDestroy)
      {
         glPushName(7);
         TGLUtil::ColorTransparency(rnrCtx.ColorSet().Markup().GetColorIndex(), 100);
         glTranslatef(0, -a, 0);
         glBegin(GL_QUADS);
         glVertex3f( 0, 0, z);
         glVertex3f( a, 0, z);
         glVertex3f( a, a, z);
         glVertex3f( 0, a, z);
         glEnd();
         {
            glBegin(GL_LINES);
            TGLUtil::ColorTransparency(rnrCtx.ColorSet().Markup().GetColorIndex(), 40);
            Float_t s = a/3;
            glVertex3f( s, s, z);
            glVertex3f( a-s, a-s, z);
            glVertex3f( s, a-s, z);
            glVertex3f( a-s, s, z);
            glEnd();
         }
         glPopName();   
      }
   }

   glEnable(GL_DEPTH_TEST);
   glMatrixMode(GL_PROJECTION);
   glPopMatrix();
   glMatrixMode(GL_MODELVIEW);
   glPopMatrix();

   glPopAttrib();
}


Bool_t CmsAnnotation::Handle(TGLRnrCtx&          rnrCtx,
                             TGLOvlSelectRecord& selRec,
                             Event_t*            event)
{
   // Handle overlay event.
   // Return TRUE if event was handled.

   if (selRec.GetN() < 2) return kFALSE;
   int recID = selRec.GetItem(1);

   switch (event->fType)
   {
      case kButtonPress:
      {
         fMouseX = event->fX;
         fMouseY = event->fY;
         fDrag = (recID == kResize) ? kResize : kMove;
         fSizeDrag = fSize;
         return kTRUE;
      }
      case kButtonRelease:
      {
         fDrag = kNone;
         if (recID == 7)
         {
            fParent->RequestDraw(rnrCtx.ViewerLOD());
            delete this;
            return kTRUE;
         }
         break;
      }
      case kMotionNotify:
      {
         const TGLRect& vp = rnrCtx.RefCamera().RefViewport();
         if (vp.Width() == 0 || vp.Height() == 0) return false;
         if (fDrag != kNone)
         {
            if (fDrag == kMove)
            {
               fPosX += (Float_t)(event->fX - fMouseX) / vp.Width();
               fPosY -= (Float_t)(event->fY - fMouseY) / vp.Height();
               fMouseX = event->fX;
               fMouseY = event->fY;

               Float_t h = fSize;
               Float_t w = fSize/vp.Aspect();

               // Make sure we don't go offscreen (use fDraw variables set in draw)
               if (fPosX < 0)
                  fPosX = 0;
               else if (fPosX +w > 1.0f)
                  fPosX = 1.0f - w;
               if (fPosY < h)
                  fPosY = h;
               else if (fPosY > 1.0f)
                  fPosY = 1.0f;
            }
            else
            {
               using namespace TMath;
               Float_t oovpw = 1.0f / vp.Width(), oovph = 1.0f / vp.Height();
               
               Float_t xw = oovpw * Min(Max(0, event->fX), vp.Width());
               Float_t yw = oovph * Min(Max(0, vp.Height() - event->fY), vp.Height());
               
               Float_t rx = Max((xw - fPosX) / (oovpw * fMouseX - fPosX), 0.0f);
               Float_t ry = Max((yw - fPosY) / (oovph*(vp.Height() - fMouseY) - fPosY), 0.0f);
               
               fSize  = Max(fSizeDrag * Min(rx, ry), 0.01f);               
            }
         }
         return kTRUE;
      }
      default:
      {
         return kFALSE;
      }
   }

   return false;
}

//______________________________________________________________________________
Bool_t CmsAnnotation::MouseEnter(TGLOvlSelectRecord& /*rec*/)
{
   // Mouse has entered overlay area.

   fActive = kTRUE;
   return kTRUE;
}

//______________________________________________________________________
void CmsAnnotation::MouseLeave()
{
   // Mouse has left overlay area.

   fActive = kFALSE;
}


//______________________________________________________________________
bool CmsAnnotation::getVisible() const
{
   return GetState() == TGLOverlayElement::kActive;
}

//______________________________________________________________________
void CmsAnnotation::setVisible(Bool_t x)
{
   SetState(x ? (TGLOverlayElement::kActive) : (TGLOverlayElement::kInvisible));
   fParent->Changed();
   gEve->Redraw3D();
}

//______________________________________________________________________________

void
CmsAnnotation::addTo(FWConfiguration& iTo) const
{
   std::stringstream s;
   s<<fSize;
   iTo.addKeyValue("LogoSize",FWConfiguration(s.str()));
   
   std::stringstream x;
   x<<fPosX;
   iTo.addKeyValue("LogoPosX",FWConfiguration(x.str()));
   
   std::stringstream y;
   y<<fPosY;
   iTo.addKeyValue("LogoPosY",FWConfiguration(y.str()));
}

void
CmsAnnotation::setFrom(const FWConfiguration& iFrom) 
{
   const FWConfiguration* value;
   value = iFrom.valueForKey("LogoSize");
   if (value) fSize = atof(value->value().c_str());
   
   value = iFrom.valueForKey("LogoPosX");
   if (value) fPosX = atof(value->value().c_str());
   
   value = iFrom.valueForKey("LogoPosY");
   if (value) fPosY = atof(value->value().c_str());
   
}