TnbMfcDragDrawingListCtrl.h

[詳解]

#pragma once
#include "TnbMfcDrawingListCtrl.h"
#include "TnbMfcDrag.h"
 
 
 
//TNB Library
namespace TNB {
namespace MFC {
 
 
 
class CDragDrawingListCtrl : public CDragAddinT<CDrawingListCtrl>
{
    DEFSUPER(CDragAddinT<CDrawingListCtrl>);
    int     m_itemHeight;       
    int     m_headerHeight;     
    int     m_ctrlId;           
    int     m_scrollCount;      
    int GetItemHeight(void)
    {
        if ( m_itemHeight < 0 )
        {
            CRect rc;
            GetItemRect(0, &rc, LVIR_BOUNDS);
            m_itemHeight = rc.Height();
        }
        return m_itemHeight;
    }
    int GetHeaderHeight(void)
    {
        if ( m_headerHeight < 0 )
        {
            CRect rc;
            GetHeaderCtrl()->GetClientRect(rc);
            m_headerHeight = rc.Height();
        }
        return m_headerHeight;
    }
 
protected:
 
    int GetVirtualCtrlID(void) const
    {
        return m_ctrlId;
    }
 
    virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
    {
        if ( message == WM_LBUTTONDOWN )
        {
            CPoint po;
            ::GetCursorPos(&po);
            ScreenToClient(&po);
            if ( _super::HitTest(po, NULL) >= 0 )
            {
                CListCtrl::WindowProc(message, wParam, lParam);
            }
        }
        else if ( IsNofityMessage(message) && wParam == static_cast<WPARAM>(MAKELONG(CANDROP, GetDragGroupID())) )
        {
            if ( ! _super::CanDropping() )
            {
                return false;
            }
            TDropParam* P = reinterpret_cast<TDropParam*>(lParam);  //クライアント座標が格納されている
            if ( P->point.y < GetHeaderHeight() + 2 )
            {
                return false;
            }
            int h = GetItemHeight();
            CRect rc;
            _super::GetClientRect(&rc);
            LONG scrollHeight = 0;
            if ( P->point.y < GetHeaderHeight() + 2 + h )
            {
                if ( _super::GetTopIndex() > 0 && ++m_scrollCount > 4 )
                {
                    scrollHeight = -h;
                }
            }
            else if ( rc.bottom - h < P->point.y )
            {
                int i1 = _super::GetItemCount() - _super::GetTopIndex();
                int i2 = _super::GetCountPerPage();
                if ( i1 > i2 && ++m_scrollCount > 4 )
                {
                    scrollHeight = h;
                }
            }
            if ( scrollHeight != 0 )
            {
                m_scrollCount = 0;
                _super::Scroll(CSize(0, scrollHeight));
                _super::Invalidate(false);
            }
            int r = _super::HitTest(P->point, NULL);
            if ( r >= 0 )
            {
                RECT rc;
                _super::GetItemRect(r, &rc, LVIR_BOUNDS);
                _DeleteObject(P->hRgn);
                P->hRgn = ::CreateRectRgnIndirect(&rc);
                ASSERT1( m_ctrlId + r < 0x10000, "CDrawingListCtrlDg", "仮想コントロールIDが WORD で表現できない値になってしまいました(%u)。", m_ctrlId + r );
                P->ctrlID = static_cast<WORD>(m_ctrlId + r);
                return true;
            }
            return false;
        }
        return _super::WindowProc(message, wParam, lParam);
    }
 
    virtual int OnBeginDrag(RECT& _rc, const POINT& po)
    {
        CPoint p = po;
        ScreenToClient(&p);
        int r = HitTest(p, NULL);
        if ( r >= 0 )
        {
            if ( ! ::DragDetect(m_hWnd, p) )
            {
                return 0;
            }
//          UINT s = LVIS_SELECTED | LVIS_FOCUSED;
//          SetItemState(r, s, s);
            GetItemRect(r, &_rc, LVIR_BOUNDS);
            ClientToScreen(&_rc);
            //void SetDraggingBitmap(CBitmapHandle bmp)
            return m_ctrlId + r;
        }
        return 0;
    }   
 
 
public:
 
    CDragDrawingListCtrl(void) 
        : _super(), m_ctrlId(0x8000), m_itemHeight(-1), m_headerHeight(-1), m_scrollCount(0)
    {
    }
 
    ~CDragDrawingListCtrl(void)
    {
    }
 
    void SetVirtualCtrlID(int base)
    {
        m_ctrlId = base;
    }
};
 
 
 
}; // MFC
}; // TNB