/****************************************************
*
* 名称：FindItem
*
* 功能：在树控制中根据数据项名称查找数据项
*
* 参数：item    - 要查询的数据项及其子数据项
*
*       strText - 要查询的数据项名称
*
* 返回值：NULL  - 没找到
*     
*        (非空的HTREEITEM ) - 找到
*
**************************************************/
HTREEITEM CTreeCtrlEx::FindItem(HTREEITEM item, CString strText)
{
 HTREEITEM hFind; 
 if(item == NULL)
  return NULL;
 while(item!=NULL)
 {
  if(GetItemText(item) == strText)
   return item;
  if(ItemHasChildren(item))
  {
   item = GetChildItem(item);
   hFind = FindItem(item,strText);  
   if(hFind)
   {
    return hFind;  
   }
   else
   {
   item= GetNextSiblingItem(GetParentItem(item));
   }
  }
  else
  {
   item = GetNextSiblingItem(item);
   if(item==NULL)
    return NULL;
  }  
 }

 return item;
}

void CMyTreeCtrlDlg::OnBeginlabeleditMytree(NMHDR* pNMHDR, LRESULT* pResult)
{
 TV_DISPINFO* pTVDispInfo = (TV_DISPINFO*)pNMHDR;
 // TODO: Add your control notification handler code here
 m_ctrlTree.GetEditControl()->LimitText(16);
 *pResult = 0;
}

void CMyTreeCtrlDlg::OnEndlabeleditMytree(NMHDR* pNMHDR, LRESULT* pResult)
{
 TV_DISPINFO* pTVDispInfo = (TV_DISPINFO*)pNMHDR;
 // TODO: Add your control notification handler code here
 CString strName;
 m_ctrlTree.GetEditControl()->GetWindowText(strName);
 if(strName.IsEmpty())
 { 
  AfxMessageBox(_T("数据项名称不能为空，请重新输入!"));
  CEdit* pEdit = m_ctrlTree.EditLabel(m_hInsertItem);
  ASSERT(pEdit != NULL);
  return;
 }

 HTREEITEM hRoot = m_ctrlTree.GetRootItem();
 HTREEITEM hFind = m_ctrlTree.FindItem(hRoot,strName);
 if(hFind==NULL)
 {
  char msg[64]={0};
  sprintf(msg,"新添加数据项名称 %s ,确定吗?",strName);
  if(MessageBox(msg,_T("提示"),MB_OKCANCEL) == IDOK)
   *pResult = TRUE;
  else
   m_ctrlTree.DeleteItem(m_hInsertItem);
 }
 else
 {
  AfxMessageBox(_T("该数据项已存在，请重新输入!"));
  CEdit* pEdit = m_ctrlTree.EditLabel(m_hInsertItem);
  ASSERT(pEdit != NULL);
  *pResult = 0;  
 } 
}