ColorBlob.h

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#pragma once
#include "stdafx.h"

//--------------------------------------------------------------------------------------
//--------------------------------------------------------------------------------------
//
//
//                                                  WTL Control Library
//                                                           by
//                                            Bright Ideas Software®
//                               Copyright © 2018 by Bright Ideas Software.
//
//
//
//--------------------------------------------------------------------------------------
//--------------------------------------------------------------------------------------

namespace BIS_WTL_CONTROLS
{

    //----------------------------------------------------------------------------------------------
    class CColorBlob : public CWindowImpl<CColorBlob, CStatic> 
    {
    public:

        DECLARE_WND_SUPERCLASS(_T("CColorBlob"), CStatic::GetWndClassName())

        CColorBlob() noexcept;
        virtual ~CColorBlob();


        void SubclassStatic(HWND hWnd);
        void UnSubclassStatic();

        void SetBackColor(COLORREF value);
        COLORREF GetBackColor() const;

        void SetEdgeStyle(CEdgeStyle style);
        CEdgeStyle GetEdgeStyle() const;

        void UpdateContent();


    private:

        void UpdateBackBrush();

        void PrepareGDIStuff();
        void DestroyGDIStuff();

        void DrawEdge(CRect r);

        bool m_bDirtyColor;
        bool m_bUpdateContent;

        COLORREF m_clrBackColor;
        CEdgeStyle m_EdgeStyle;

        HBRUSH m_hbrBackBrush;
        HBITMAP m_hOldMap;
        CImage m_hCanvas;
        HDC m_hMemDC;



        BOOL OnEraseBkgnd(CDCHandle dc);
        LRESULT OnPaint(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);

        BEGIN_MSG_MAP_EX(CColorBlob)    
            MESSAGE_HANDLER(WM_PAINT,    OnPaint)
            MSG_WM_ERASEBKGND(OnEraseBkgnd)
        END_MSG_MAP()


    };
    //----------------------------------------------------------------------------------------------
};