CDialogResizeHelper.h

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class CDialogResizeHelper {
public:
    typedef dialog_resize_helper::param ParamOld;

    struct Param {
        t_uint32 id;
        float snapLeft, snapTop, snapRight, snapBottom;
    };
private:
    void AddSizeGrip();
public:
    inline void set_min_size(unsigned x,unsigned y) {min_x = x; min_y = y;}
    inline void set_max_size(unsigned x,unsigned y) {max_x = x; max_y = y;}
    
    
    BEGIN_MSG_MAP_EX(CDialogResizeHelper)
        if (uMsg == WM_INITDIALOG) OnInitDialog(hWnd);
        MSG_WM_SIZE(OnSize)
        MSG_WM_DESTROY(OnDestroy)
        MSG_WM_GETMINMAXINFO(OnGetMinMaxInfo)
    END_MSG_MAP()

    template<typename TParam, t_size paramCount> CDialogResizeHelper(const TParam (& src)[paramCount],CRect const& minMaxRange = CRect(0,0,0,0)) {
        InitTable(src, paramCount);
        InitMinMax(minMaxRange);
    }

    void InitTable(const Param* table, t_size tableSize);
    void InitTable(const ParamOld * table, t_size tableSize);
    void InitMinMax(const CRect & range);
    
    bool EvalRect(UINT id, CRect & out) const;

private:
    bool _EvalRect(t_size index, CSize wndSize, CRect & out) const;
    void OnGetMinMaxInfo(LPMINMAXINFO lpMMI) const;
    void OnSize(UINT nType, CSize size);
    void OnInitDialog(CWindow thisWnd);
    void OnDestroy();

    pfc::array_t<Param> m_table;
    pfc::map_t<UINT, CRect> m_origRects;
    CRect m_rcOrigClient;
    CWindow m_thisWnd, m_sizeGrip;
    unsigned min_x,min_y,max_x,max_y;
};

template<typename TTracker> class CDialogResizeHelperTracking : public CDialogResizeHelper {
public:
    template<typename TParam, t_size paramCount, typename TCfgVar> CDialogResizeHelperTracking(const TParam (& src)[paramCount],CRect const& minMaxRange, TCfgVar & cfgVar) : CDialogResizeHelper(src, minMaxRange), m_tracker(cfgVar) {}
    
    BEGIN_MSG_MAP_EX(CDialogResizeHelperST)
        CHAIN_MSG_MAP(CDialogResizeHelper)
        CHAIN_MSG_MAP_MEMBER(m_tracker)
    END_MSG_MAP()

private:
    TTracker m_tracker;
};

typedef CDialogResizeHelperTracking<cfgDialogSizeTracker> CDialogResizeHelperST;
typedef CDialogResizeHelperTracking<cfgDialogPositionTracker> CDialogResizeHelperPT;

#define REDRAW_DIALOG_ON_RESIZE() if (uMsg == WM_SIZE) RedrawWindow(NULL, NULL, RDW_INVALIDATE | RDW_ERASE | RDW_ALLCHILDREN);