TnbMfcHitTest.h

[詳解]

#pragma once
#include "TnbMfcCommon.h"
#include "TnbSimpleVector.h"
 
 
 
//TNB Library
namespace TNB {
namespace MFC {
 
 
 
template<typename WND = CWnd>
class CHitTestAddinT : public WND
{
    DEFSUPER(WND);
public:
    CHitTestAddinT(void) : _super()
    {
    }
 
    virtual ~CHitTestAddinT(void)
    {
        DeleteAllAreas();
    }
 
    bool AddArea(INDEX id, HRGN rgn)
    {
        HRGN h = ::CreateRectRgn(0, 0, 0, 0);
        if ( ::CombineRgn(h, rgn, NULL, RGN_COPY) == ERROR )
        {
            return false;
        }
        TParam p = { id, h };
        return m_areas.Add(p) != INVALID_INDEX;
    }
 
    bool AddArea(INDEX id, const RECT& rc)
    {
        HRGN h = ::CreateRectRgnIndirect(&rc);
        if ( h == NULL )
        {
            return false;
        }
        TParam p = { id, h };
        return m_areas.Add(p) != INVALID_INDEX;
    }
 
    void DeleteAllAreas(void)
    {
        loop ( i, m_areas.GetSize() )
        {
            _DeleteObject(m_areas[i].hRgn);
        }
        m_areas.RemoveAll();
    }
 
    INDEX HitTest(const POINT& po) const
    {
        loop ( i, m_areas.GetSize() )
        {
            if ( ::PtInRegion(m_areas[i].hRgn, po.x, po.y) )
            {
                return m_areas[i].id;
            }
        }
        return INVALID_INDEX;
    }
 
protected:
    struct TParam
    {
        INDEX   id;     
        HRGN    hRgn;   
    };
    CSimpleVectorT<TParam> m_areas;     
    virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
    {
        switch ( message )
        {
        case WM_GETDLGCODE:
            break;
        default:
            break;
        }
        return _super::WindowProc(message, wParam, lParam);
    }
    virtual INT_PTR OnToolHitTest(CPoint point, TOOLINFO* pTI) const
    {
        INDEX idx = HitTest(point);
        if ( idx != INVALID_INDEX )
        {
            return idx;
        }
        return -1;
    }
};
 
 
 
}; //MFC
}; //TNB