Histogram.cxx

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/*
 This class plots image's histograms in a plotter
*/

 //---------------------
 // Includes
 //----------------------
 #include "Histogram.h"
 #include  "vtkImageCast.h"
 #include  <math.h>
// ----------------------------------------------------------------------------
// WX headers inclusion.
// For compilers that support precompilation, includes <wx/wx.h>.
// ----------------------------------------------------------------------------

        #ifndef WX_PRECOMP
        #include <wx/wx.h>
        #endif

//----------------------------------------------------------------------------
// Class implementation
//----------------------------------------------------------------------------

IMPLEMENT_CLASS(Histogram, wxWindow)
//----------------------------------------------------------------------------
// Event Table
//----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(Histogram, wxWindow)
        EVT_SIZE  (Histogram::OnSize)
END_EVENT_TABLE()
 //---------------------
 // Constructor
 //----------------------

//EED Borrame 07Mai2009
//Histogram::Histogram( wxWindow *parent, wxWindowID id, const wxPoint &pos, const wxSize &size, int flag,vtkImageData* imageData):
        Histogram::Histogram( wxWindow *parent, wxWindowID id, const wxPoint &pos, const wxSize &size, int flag):
        wxPanel(parent,id,pos,size,flag)
        {
                 SetBackgroundColour(wxColour(255,255,255));
                //histogram
//EED Borrame 07Mai2009
//              histogram= new pHistogram(imageData);
                
                //plotter
                plotter=new pPlotterWindow(this, -1, wxPoint(0,0), wxSize(742,476), wxSUNKEN_BORDER );
                
                plotter->AddLayer(new pPlotterScaleX());
                plotter->AddLayer(new pPlotterScaleY());
                //is a plotter of histograms
                plotter->setType(2);
                //setting the popMenu
                plotter->setPopUpMenu(true,true,true,true,true,true,false,false,false,false,false,false,false);
                histogramSize=0;
                
                idHistogram=-1;
                
//EED Borrame 07Mai2009
                //drawing
//              drawHistogram();
                
                
        }

        Histogram::~Histogram()
        {
                delete histogram;
                delete plotter;

        }

    void Histogram::Configure(vtkImageData* imageData)
        {
                histogram= new pHistogram(imageData);
                drawHistogram();
        }

        /*
        Draw the histogram in the plotter
        */
        void Histogram::drawHistogram()
        {
                //int xValues[MAX],yValues[MAX],extent[6];
                double* xValues;
                double* yValues;
                
                vtkImageData* histogramImageData=histogram->getHistogram();
                
                //size
                histogramSize=histogram->getSize();

                //plotting
                xValues=(double*)malloc(NUM_POINTS*sizeof(double));
                yValues=(double*)malloc(NUM_POINTS*sizeof(double));
                
                unsigned short* histogramPointer=(unsigned short*)histogramImageData->GetScalarPointer(0,0,0);
                
                for(int i=0; i< histogramSize; i++)
                {
                        xValues[i]=i;
                        yValues[i]=log( (double) histogramPointer[i])*10;
                }

                
                pGraphicalFunction* histogramFunction=plotter->getFunctionForVectors(xValues,histogramSize,yValues,histogramSize);
                
                if (histogramFunction)
                {
                        histogramFunction->setEditable(false);
                        //smooth function
                        histogramFunction->setType(2);
                        //it is an histogram
                        histogramFunction->setmType(2);
                        idHistogram=plotter->addFunction(histogramFunction);
                        //for setting range the vision
                        plotter->addFunctionToMove(histogramFunction);
                        wxPen mypen1(*wxBLUE, 1, wxSOLID );
                        mypen1.SetWidth(2);
                        histogramFunction->SetPen( mypen1 );
                }
                
                
                        free(xValues);
                        free(yValues);
                
                //plotter->setPopUpMenu(true,true,false,false,true,true,false,false,false,false,false,false,false);
        }
        
        /*
                if the user resize the window   
        */
        void Histogram::OnSize(wxSizeEvent &WXUNUSED(event))
        {
                int scrX,scrY;
                GetClientSize(&scrX,&scrY);
                plotter->SetSize(scrX,scrY);
                /*
                pGraphicalFunction* actual=plotter->getFunction(idTransferenceFunction);
                actual->setScreens(scrX,scrY);
                actual->setScales();
                */
        }
        
        /*
                get a point of the Histogram
                given the grey value
        */
        int Histogram::getHistogramPoint(int gValue)
        {
                return histogram->getHistogramPoint(gValue);
        }
        

        //-------------------
        // Getter and setters
        //-------------------

        int Histogram::getHistogramSize()
        {
                return histogramSize;
        }