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listctrl.cpp
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C/C++ Source or Header
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1998-03-26
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2KB
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87 lines
// ListCtrl.cpp : implementation file
//
// this class is an override of the default clistctrl
// this version provides handlers to allow modifying the
// subitem on repeated selection of the item in the list
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 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 "DAOTable.h"
#include "ListCtrl.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CFieldListCtrl
CFieldListCtrl::CFieldListCtrl()
{
}
CFieldListCtrl::~CFieldListCtrl()
{
}
BEGIN_MESSAGE_MAP(CFieldListCtrl, CListCtrl)
//{{AFX_MSG_MAP(CFieldListCtrl)
ON_WM_LBUTTONDOWN()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CFieldListCtrl message handlers
// if you press the button over an item, then toggle the subitem
// text between "", "ascending", and "descending" for index sort order
// specification
void CFieldListCtrl::OnLButtonDown(UINT nFlags, CPoint point)
{
// what item did we select
UINT flags;
int item = HitTest(point, &flags);
// if an item is actually selected, then process
if (item != -1)
{
// get the item's current selection state based on subitem text
CString text = GetItemText(item, 1);
// if selected, then modify the sub item text
if (text != "")
{
// if already ascending, then descending is next
if (text == _T("ascending"))
{
SetItemText(item, 1, _T("descending"));
SetItemState(item, 1, LVIS_SELECTED);
CListCtrl::OnLButtonDown(nFlags, point);
}
else // descending goes to no selection or text
{
SetItemText(item, 1, _T(""));
SetItemState(item, 0, LVIS_SELECTED);
}
}
else // if no selection at all, then 1st state is ascending
{
SetItemText(item, 1, _T("ascending"));
SetItemState(item, 1, LVIS_SELECTED);
CListCtrl::OnLButtonDown(nFlags, point);
}
}
}