IVScopeControl.h

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/*
 ==============================================================================

 This file is part of the iPlug 2 library. Copyright (C) the iPlug 2 developers.

 See LICENSE.txt for  more info.

 ==============================================================================
*/

#pragma once

#include "IControl.h"
#include "ISender.h"
#include "IPlugStructs.h"

BEGIN_IPLUG_NAMESPACE
BEGIN_IGRAPHICS_NAMESPACE

template <int MAXNC = 1, int MAXBUF = 128>
class IVScopeControl : public IControl
                     , public IVectorBase
{
public:
  IVScopeControl(const IRECT& bounds, const char* label = "", const IVStyle& style = DEFAULT_STYLE)
  : IControl(bounds)
  , IVectorBase(style)
  {
    AttachIControl(this, label);
  }
  
  void Draw(IGraphics& g) override
  {
    DrawBackground(g, mRECT);
    DrawWidget(g);
    DrawLabel(g);
    
    if(mStyle.drawFrame)
      g.DrawRect(GetColor(kFR), mWidgetBounds, &mBlend, mStyle.frameThickness);
  }

  void DrawWidget(IGraphics& g) override
  {
    g.DrawHorizontalLine(GetColor(kSH), mWidgetBounds, 0.5, &mBlend, mStyle.frameThickness);
    
    IRECT r = mWidgetBounds.GetPadded(-mPadding);

    const float maxY = (r.H() / 2.f); // y +/- centre

    float xPerData = r.W() / (float) MAXBUF;

    for (int c = 0; c < mBuf.nChans; c++)
    {
      float xHi = 0.f;
      float yHi = mBuf.vals[c][0] * maxY;
      yHi = Clip(yHi, -maxY, maxY);

      g.PathMoveTo(r.L + xHi, r.MH() - yHi);
      for (int s = 1; s < MAXBUF; s++)
      {
        xHi = ((float) s * xPerData);
        yHi = mBuf.vals[c][s] * maxY;
        yHi = Clip(yHi, -maxY, maxY);
        g.PathLineTo(r.L + xHi, r.MH() - yHi);
      }
      
      g.PathStroke(GetColor(kFG), mTrackSize, IStrokeOptions(), &mBlend);
    }
  }
  
  void OnResize() override
  {
    SetTargetRECT(MakeRects(mRECT));
    SetDirty(false);
  }

  void OnMsgFromDelegate(int msgTag, int dataSize, const void* pData) override
  {
    if (!IsDisabled() && msgTag == ISender<>::kUpdateMessage)
    {
      IByteStream stream(pData, dataSize);

      int pos = 0;
      pos = stream.Get(&mBuf, pos);

      SetDirty(false);
    }
  }

private:
  ISenderData<MAXNC, std::array<float, MAXBUF>> mBuf;
  float mPadding = 2.f;
};

END_IGRAPHICS_NAMESPACE
END_IPLUG_NAMESPACE