TestPolyControl.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 TestPolyControl : public IKnobControlBase
{
public:
  TestPolyControl(IRECT rect, int paramIdx = kNoParameter)
  : IKnobControlBase(rect, paramIdx)
  {
    SetTooltip("TestPolyControl");
  }
 
  void Draw(IGraphics& g) override
  {
    const float value = (float) GetValue();
    float xarray[32];
    float yarray[32];
    int npoints = 3 + (int) roundf((float) value * 29.f);
    float angle = (-0.75f * (float) PI) + (float) value * (1.5f * (float) PI);
    float incr = (2.f * (float) PI) / npoints;
    float cr = (float) value * (mRECT.W() / 2.f);
 
    g.FillRoundRect(COLOR_WHITE, mRECT.GetPadded(-2.f), cr);
    g.DrawRoundRect(COLOR_BLACK, mRECT.GetPadded(-2.f), cr);
 
    for (int i = 0; i < npoints; i++)
    {
      xarray[i] = mRECT.MW() + sinf(angle + (float) i * incr) * mRECT.W() * 0.45f;
      yarray[i] = mRECT.MH() + cosf(angle + (float) i * incr) * mRECT.W() * 0.45f;
    }
 
    //IBlend blend { EBlend::Default, 0.5 };
    g.FillConvexPolygon(IColor(120, 255, 127, 0), xarray, yarray, npoints);//, &blend);
    g.DrawConvexPolygon(COLOR_BLACK, xarray, yarray, npoints);
  }
 
  void OnMouseDown(float x, float y, const IMouseMod& mod) override
  {
    GetUI()->HideMouseCursor();
    IKnobControlBase::OnMouseDown(x, y, mod);
  }
 
  void OnMouseUp(float x, float y, const IMouseMod& mod) override
  {
    GetUI()->HideMouseCursor(false);
    IKnobControlBase::OnMouseUp(x, y, mod);
  }
};