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);
 
    for (int c=0; c<mBuf.nChans; c++)
    {
      // drawdata expects normalized values and buffer contains unnormalized, so draw in the top half
      g.DrawData(GetColor(kFG), r.FracRectVertical(0.5, true), mBuf.vals[c].data(), mBufferSize, nullptr, &mBlend, mTrackSize);
    }
  }
  
  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);
    }
  }
  
  void SetBufferSize(int bufferSize)
  {
    assert(bufferSize > 0);
    assert(bufferSize <= MAXBUF);
    mBufferSize = bufferSize;
  }
 
private:
  ISenderData<MAXNC, std::array<float, MAXBUF>> mBuf;
  float mPadding = 2.f;
  int mBufferSize = MAXBUF;
};
 
END_IGRAPHICS_NAMESPACE
END_IPLUG_NAMESPACE