FreqGauge.cpp

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  FreqGauge.cpp
 
  Dominic Mazzoni
 
**********************************************************************/
 
/*
  Salvo Ventura - November 2006
  Extended range check for additional FFT windows
*/
 
#include "FreqGauge.h"
#include "FFT.h"
 
#include <wx/dcclient.h>
 
FreqGauge::FreqGauge(wxWindow * parent, wxWindowID winid)
:  wxStatusBar(parent, winid, wxST_SIZEGRIP)
{
   mRange = 0;
}
 
void FreqGauge::SetRange(int range, int bar, int gap)
{
   mRange = range;
   mBar = bar;
   mGap = gap;
 
   GetFieldRect(0, mRect);
   mRect.Inflate(-1);
 
   mInterval = mRange / (mRect.width / (mBar + mGap));
   mRect.width = mBar;
   mMargin = mRect.x;
   mLast = -1;
 
   Update();
}
 
void FreqGauge::SetValue(int value)
{
   mCur = value / mInterval;
 
   if (mCur != mLast)
   {
      wxClientDC dc(this);
      dc.SetPen(*wxTRANSPARENT_PEN);
      dc.SetBrush(wxColour(100, 100, 220));
 
      while (mLast < mCur)
      {
         mLast++;
         mRect.x = mMargin + mLast * (mBar + mGap);
         dc.DrawRectangle(mRect);
      }
      Update();
   }
}
 
void FreqGauge::Reset()
{
   mRange = 0;
   Refresh(true);
}