ICornerResizerControl.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"

BEGIN_IPLUG_NAMESPACE
BEGIN_IGRAPHICS_NAMESPACE

class ICornerResizerControl : public IControl
{
public:
  ICornerResizerControl(const IRECT& graphicsBounds, float size, const IColor& color = COLOR_TRANSLUCENT, const IColor& mouseOverColour = COLOR_BLACK, const IColor& dragColor = COLOR_BLACK)
  : IControl(graphicsBounds.GetFromBRHC(size, size).GetPadded(-1))
  , mSize(size)
  , mInitialGraphicsBounds(graphicsBounds)
  , mColor(color)
  , mMouseOverColor(mouseOverColour)
  , mDragColor(dragColor)
  {
  }

  void Draw(IGraphics& g) override
  {
    const IColor &color = GetUI()->mResizingInProcess ? mDragColor : GetMouseIsOver()? mMouseOverColor : mColor;
    
    g.FillTriangle(color, mRECT.L, mRECT.B, mRECT.R, mRECT.T, mRECT.R, mRECT.B);
  }

  void OnMouseDown(float x, float y, const IMouseMod& mod) override
  {
    GetUI()->StartDragResize();
  }
    
  void OnMouseDblClick(float x, float y, const IMouseMod& mod) override
  {
    GetUI()->Resize(static_cast<int>(mInitialGraphicsBounds.W()), static_cast<int>(mInitialGraphicsBounds.H()), 1.f);
  }

  void OnRescale() override
  {
    float size = mSize * (1.f/GetUI()->GetDrawScale());
    IRECT r = GetUI()->GetBounds().GetFromBRHC(size, size);
    SetTargetAndDrawRECTs(r);
  }

  void OnMouseOver(float x, float y, const IMouseMod& mod) override
  {
    if (!mMouseOver)
      mPrevCursorType = GetUI()->SetMouseCursor(ECursor::SIZENWSE);
    mMouseOver = true;
    IControl::OnMouseOver(x, y, mod);
  }

  void OnMouseOut() override
  {
    if (mMouseOver)
      GetUI()->SetMouseCursor(mPrevCursorType);
    mMouseOver = false;
    IControl::OnMouseOut();
  }
private:
  float mSize;
  bool mMouseOver = false;
  ECursor mPrevCursorType = ECursor::ARROW;
  IRECT mInitialGraphicsBounds;
  IColor mColor, mMouseOverColor, mDragColor;
};

END_IGRAPHICS_NAMESPACE
END_IPLUG_NAMESPACE