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Borland C++ V5.02
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CMNCTRL.PAK
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MLISTCTL.CPP
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C/C++ Source or Header
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1997-05-06
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166 lines
// MyListCtrl.cpp : implementation file
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1995 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.
#include "stdafx.h"
#include "ctrldemo.h"
#include "mlistctl.h"
#include "listcpg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CMyListCtrl
CMyListCtrl::CMyListCtrl()
{
m_bDragging = FALSE;
m_pimageListDrag = NULL;
}
CMyListCtrl::~CMyListCtrl()
{
}
BEGIN_MESSAGE_MAP(CMyListCtrl, CListCtrl)
//{{AFX_MSG_MAP(CMyListCtrl)
ON_NOTIFY_REFLECT(LVN_BEGINDRAG, OnBeginDrag)
ON_NOTIFY_REFLECT(LVN_BEGINRDRAG, OnBeginDrag)
ON_NOTIFY_REFLECT(LVN_ENDLABELEDIT, OnEndLabelEdit)
ON_WM_MOUSEMOVE()
ON_WM_LBUTTONUP()
ON_WM_RBUTTONUP()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMyListCtrl message handlers
void CMyListCtrl::OnBeginDrag(LPNMHDR pnmhdr, LRESULT *pResult)
{
CPoint ptItem, ptAction, ptImage;
NM_LISTVIEW *pnmListView = (NM_LISTVIEW *)pnmhdr;
((CListCtrlPage *)GetParent())->ShowNotification(pnmhdr, pResult);
ASSERT(!m_bDragging);
m_bDragging = TRUE;
m_iItemDrag = pnmListView->iItem;
ptAction = pnmListView->ptAction;
GetItemPosition(m_iItemDrag, &ptItem); // ptItem is relative to (0,0) and not the view origin
GetOrigin(&m_ptOrigin);
m_pimageListDrag = CreateDragImage(m_iItemDrag, &ptImage);
m_sizeDelta = ptAction - ptImage; // difference between cursor pos and image pos
m_ptHotSpot = ptAction - ptItem + m_ptOrigin; // calculate hotspot for the cursor
m_pimageListDrag->DragShowNolock(TRUE); // lock updates and show drag image
m_pimageListDrag->SetDragCursorImage(0, m_ptHotSpot); // define the hot spot for the new cursor image
m_pimageListDrag->BeginDrag(0, CPoint(0, 0));
ptAction -= m_sizeDelta;
m_pimageListDrag->DragEnter(this, ptAction);
m_pimageListDrag->DragMove(ptAction); // move image to overlap original icon
SetCapture();
}
void CMyListCtrl::OnMouseMove(UINT nFlags, CPoint point)
{
long lStyle;
int iItem;
LV_ITEM lvitem;
lStyle = GetWindowLong(m_hWnd, GWL_STYLE);
lStyle &= LVS_TYPEMASK; // drag will do different things in list and report mode
if (m_bDragging)
{
m_pimageListDrag->DragMove(point - m_sizeDelta); // move the image
if ((iItem = HitTest(point)) != -1)
{
m_iItemDrop = iItem;
m_pimageListDrag->DragLeave(this); // unlock the window and hide drag image
if (lStyle == LVS_REPORT || lStyle == LVS_LIST)
{
lvitem.iItem = iItem;
lvitem.iSubItem = 0;
lvitem.mask = LVIF_STATE;
lvitem.stateMask = LVIS_DROPHILITED; // highlight the drop target
SetItem(&lvitem);
}
point -= m_sizeDelta;
m_pimageListDrag->DragEnter(this, point); // lock updates and show drag image
}
}
CListCtrl::OnMouseMove(nFlags, point);
}
void CMyListCtrl::OnButtonUp(CPoint point)
{
if (m_bDragging) // end of the drag operation
{
long lStyle;
CString cstr;
lStyle = GetWindowLong(m_hWnd, GWL_STYLE) & LVS_TYPEMASK;
m_bDragging = FALSE;
m_pimageListDrag->DragLeave(this);
m_pimageListDrag->EndDrag();
if (lStyle == LVS_REPORT && m_iItemDrop != m_iItemDrag)
{
cstr = GetItemText(m_iItemDrag, 0);
SetItemText(m_iItemDrop, 1, cstr); // drop subitem text is dragged main item text
}
if (lStyle == LVS_LIST && m_iItemDrop != m_iItemDrag) //add ** to the drop item text
{
cstr = GetItemText(m_iItemDrop, 0);
cstr += _T("**");
SetItemText(m_iItemDrop, 0, cstr);
}
if (lStyle == LVS_ICON || lStyle == LVS_SMALLICON) // move the icon
{
point -= m_ptHotSpot; // the icon should be drawn exactly where the image is
point += m_ptOrigin;
SetItemPosition(m_iItemDrag, point); // just move the dragged item
}
::ReleaseCapture();
}
}
void CMyListCtrl::OnLButtonUp(UINT nFlags, CPoint point)
{
OnButtonUp(point);
CListCtrl::OnLButtonUp(nFlags, point);
}
void CMyListCtrl::OnRButtonUp(UINT nFlags, CPoint point)
{
OnButtonUp(point);
CListCtrl::OnRButtonUp(nFlags, point);
}
void CMyListCtrl::OnEndLabelEdit(LPNMHDR pnmhdr, LRESULT *pLResult)
{
LV_DISPINFO *plvDispInfo = (LV_DISPINFO *)pnmhdr;
LV_ITEM *plvItem = &plvDispInfo->item;
((CListCtrlPage *)GetParent())->ShowNotification(pnmhdr, pLResult);
if (plvItem->pszText != NULL)
SetItemText(plvItem->iItem, plvItem->iSubItem, plvItem->pszText);
}