|| || || || || || || ||

---

HistogramBars.h

Go to the documentation of this file.

//345678901234567890123456789012345678901234567890123456789012345678901234567890
// Author: Richard van Balen
#ifndef Impala_Application_TagsLife_HistogramBars_h
#define Impala_Application_TagsLife_HistogramBars_h

namespace Impala {
namespace Application {
namespace TagsLife {

#ifndef OglGui_Window_h
#include "OglGui/Window.h"
#endif

class HistogramBars :    public OglGui::Window
{
public:
    typedef OglGui::Window          Window;

    HistogramBars(Window* parent, int x, int y, int w, int h) :
        Window(parent,x,y,w,h)
    {
        Init(w,h);
    }

    void Clear()
    {
        mStartBar = mEndBar = -1;
        mMaxFreq = 0;
        mHistogram.clear();
    }

    void AddToHistogram(int val)
    {
        if (val > mMaxFreq)
            mMaxFreq = val;

        mHistogram.push_back(val);
    }

    void HighLightInterval(int startBar, int endBar)
    {
        mStartBar = startBar;
        mEndBar   = endBar;
    }

    void SetColors(int normalColor, int highlightColor)
    {
        mNormalColor    = normalColor;
        mHighlightColor = highlightColor;
    }

    virtual void DisplayFunc()
    {
        OGC oldOGC;
        OGCSave(&oldOGC);

        Window::DisplayFunc();

        int     nrBars = mHistogram.size();
        ILOG_VAR(Impala.Application.TagsLife.HistogramBars);
        float   slotSz = W() / (float) nrBars;
        float   barSz  = (slotSz > 2) ? slotSz / 2 : 1;

        for (int i=0; i<nrBars; i++)
        {
            int x = i * slotSz;
            bool highLight = (i >= mStartBar && i <= mEndBar);
            ULONG color = (highLight ? mHighlightColor : mNormalColor);
            SetSolidFillColor(color);
            int barH = (mHistogram[i] / (float) mMaxFreq) * H();
            FillRectangle(x+slotSz/4,0,barSz,barH);
        }
        OGCRestore(&oldOGC);
    }

private:
    void Init(int w, int h)
    {
        mStartBar = mEndBar = -1;
        mNormalColor = oglRED;
        mHighlightColor = 0xff800000;
        mMaxFreq = 0;
    }

    std::vector<int>    mHistogram;
    ULONG               mNormalColor;
    ULONG               mHighlightColor;
    int                 mStartBar;
    int                 mEndBar;
    int                 mMaxFreq;
};

} // namespace HistogramBars
} // namespace Application
} // namespace Impala

#endif

---