一个小问题，关于可编辑SubItemr的CListCtrl

[kenskens]

采用子类化Edit控件，将其移动到命中的SubItem上方进行编辑的方法，但出了点小问题，主要代码如下：
void CFlashIO3Dlg::OnClickList1(NMHDR* pNMHDR, LRESULT* pResult)
{
NMITEMACTIVATE *pLSV = (NMITEMACTIVATE*)pNMHDR;
if( (pLSV->iItem != -1) && (pLSV->iSubItem != 0) ) // 命中某子项
{
m_iItem = pLSV->iItem; // 保存命中子项的位置
m_iSubItem = pLSV->iSubItem;
m_lsvTest.EditLabel(m_iItem);
}

*pResult = 0;
}

void CFlashIO3Dlg::OnBeginlabeleditList1(NMHDR* pNMHDR, LRESULT* pResult)
{
LV_DISPINFO* pDispInfo = (LV_DISPINFO*)pNMHDR;
// TODO: Add your control notification handler code here
if(pDispInfo->item.iItem != -1)
{
ASSERT(m_iItem == pDispInfo->item.iItem);

HWND hEdit = (HWND)m_lsvTest.SendMessage(LVM_GETEDITCONTROL);
ASSERT(hEdit != NULL);
VERIFY(m_edtSub.SubclassWindow(hEdit)); // 子类化控件

CRect rect; // 获取命中子项的坐标
m_lsvTest.GetSubItemRect(m_iItem, m_iSubItem, LVIR_BOUNDS, rect);

// m_edtSub为CSubEdit类对象
m_edtSub.m_x = rect.left + 2; // Edit将出现在命中SubItem的上方 m_edtSub.m_cx = rect.Width()-2;
// 将SubItem内容显示到Edit中供编辑
m_edtSub.SetWindowText(m_lsvTest.GetItemText(m_iItem, m_iSubItem));
*pResult = 0; // 允许编辑
}
else
{
*pResult = 1; // 禁止编辑
}
}

void CFlashIO3Dlg::OnEndlabeleditList1(NMHDR* pNMHDR, LRESULT* pResult)
{
LV_DISPINFO* pDispInfo = (LV_DISPINFO*)pNMHDR;
// TODO: Add your control notification handler code here
if(pDispInfo->item.iItem != -1)
{
ASSERT(pDispInfo->item.iItem == m_iItem);

if(pDispInfo->item.pszText != NULL)
{ // 设置编辑结果至SubItem
m_lsvTest.SetItemText(m_iItem, m_iSubItem, pDispInfo->item.pszText);
m_edtSub.UnsubclassWindow();
*pResult = 0; // 恢复第0子项
}
}
else
{
*pResult = 1; // 将编辑应用于第0子项
}

m_iItem = -1;
m_iSubItem = -1;
}

void CSubEdit::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos)
{
lpwndpos->x = m_x; // 移动Edit至SubItem处
lpwndpos->cx = m_cx;

CEdit::OnWindowPosChanging(lpwndpos);

// TODO: Add your message handler code here
}

现在的问题是当开始编辑SubItem(非0)时，SubItem 0 上的文字消失了，等编辑完成或取消后才恢复显示，我觉得这可能是Edit被移走后，SubItem 0没有重绘的原因吧，但不敢确定，请教高手这是为什么，该怎么解决呢？

[goodboyws]

OnWindowPosChanging去掉应该就可以了，出现空白的原因就是Edit出现时被你移到了错误的位置

[klabc]

为什么要使用MFC为你创建那个edit控件呢？你在调用EditLabel的时候，MFC认为用户要编辑0 subitem的那个项，所以在那个位置创建了一个CEdit控件，你移动那个控件会导致0 subitem显示不正常。

其实有更安全也更简单的办法来做。假如你想编辑2 subitem.
1.首先为dialog添加一个protected member, CEdit* m_pEdit; 初始化为null.
2.响应LVN_ITEMCHANGED消息
ON_NOTIFY(LVN_ITEMCHANGED, IDC_LIST_EDIT, OnItemchangedListEdit)

void CTT2Dlg::OnItemchangedListEdit(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
// TODO: Add your control notification handler code here
*pResult = 0;
int nItem = pNMListView->iItem;
int nSubItem = 2;
CRect rcSubItem;
m_editListctrl.GetSubItemRect(nItem, 2, LVIR_BOUNDS, rcSubItem);

if ( (pNMListView->uOldState & LVIS_SELECTED) && !(pNMListView->uNewState & LVIS_SELECTED) )
{//This item is de-selected.
TRACE(_T("Item %d is de-selected\n"), nItem);
if (NULL != m_pEdit)
{
CString cs;
m_pEdit->GetWindowText(cs);
m_editListctrl.SetItemText(nItem, 2, cs);
m_pEdit->ShowWindow(SW_HIDE);
}
m_editListctrl.InvalidateRect(rcSubItem);
return;

}
if ( !(pNMListView->uOldState & LVIS_SELECTED) && (pNMListView->uNewState & LVIS_SELECTED) )
{
TRACE(_T("Item %d is selected\n"), nItem);
if (NULL == m_pEdit)
{
m_pEdit = new CEdit;
m_pEdit->Create(WS_CHILD | WS_VISIBLE | WS_TABSTOP,
rcSubItem, &m_editListctrl, 0x10);
ASSERT(m_pEdit->GetSafeHwnd());
}
m_pEdit->SetWindowText( m_editListctrl.GetItemText(nItem, nSubItem) );
m_pEdit->ShowWindow(SW_SHOW);
m_pEdit->MoveWindow(rcSubItem);

m_editListctrl.InvalidateRect(rcSubItem);
return;
}
}

[taole0160]

加上这个
void CV2::OnPaint()
{
// CPaintDC dc(this); // device context for painting


// TODO: Add your message handler code here
if (m_subitem)
{
CRect rect;
CRect editrect;

GetListCtrl().GetSubItemRect(m_item1,m_subitem,LVIR_LABEL ,editrect);

m_editWnd.GetWindowRect(editrect);
ScreenToClient(editrect);

//block text redraw of the subitems text (underneath the editcontrol)
//if we didn't do this and deleted some text in the edit control,
//the subitems original label would show
if (editrect.right < rect.right)
{
rect.left = editrect.right ;
ValidateRect(rect);
}

//block filling redraw of leftmost item (caused by FillRect)
GetListCtrl().GetItemRect(m_item1,rect,LVIR_LABEL );
ValidateRect(rect);
}

CListView::OnPaint();
// Do not call CListView::OnPaint() for painting messages
}

[captainliyun]

有没有E_MAIL.给你一份代码

[livedeal]

留底，学习