TestLayerControl.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"

class TestLayerControl : public IKnobControlBase
{
public:
  TestLayerControl(const IRECT& rect, int paramIdx)
  : IKnobControlBase(rect, paramIdx)
  {
    SetTooltip("TestLayerControl");
  }

  void Draw(IGraphics& g) override
  {
    g.DrawDottedRect(COLOR_BLACK, mRECT);

    if (mDrawBackground)
    {
      if (!g.CheckLayer(mLayer))
      {
        IText text;
        text.mVAlign = EVAlign::Top;
        text.mSize = 15;
        g.StartLayer(this, mRECT);
        g.FillRoundRect(COLOR_LIGHT_GRAY, mRECT.GetPadded(-5.5f), mRECT.W() / 4.f);
        g.DrawText(text, "Cached Layer", mRECT.GetPadded(-10.f));
        mLayer = g.EndLayer();
      }

      g.DrawLayer(mLayer);
    }

    g.FillCircle(COLOR_BLUE, mRECT.MW(), mRECT.MH(), mRECT.H() / 4.f);
    g.DrawRadialLine(COLOR_BLACK, mRECT.MW(), mRECT.MH(), -120.f + static_cast<float>(GetValue()) * 240.f, 0.f, mRECT.H() / 4.f, nullptr, 3.f);
  }

  void OnMouseDown(float x, float y, const IMouseMod& mod) override
  {
    mLayer->Invalidate();
    mDrawBackground = !mDrawBackground;
    SetDirty(false);
  }

private:
  ILayerPtr mLayer;
  bool mDrawBackground = true;
};