check1

在CTreeCtrl中捕获复选框选中消息,父子节点选中状态联动

一些代码 2009-09-23 08:11:49 阅读98 评论0   字号：大中小 订阅

void CMyDlg::OnClickTree1(NMHDR* pNMHDR, LRESULT* pResult) {// TODO: Add your control notification handler code hereNM_TREEVIEW* pHdr = (NM_TREEVIEW*)pNMHDR;*pResult = 0;

CPoint point;UINT uFlag;GetCursorPos(&point);ScreenToClient(&point);

HTREEITEM item = m_ctrlTree.HitTest(point, &uFlag);if((item) && (TVHT_ONITEMSTATEICON & uFlag))   {   BOOL bCheck = m_ctrlTree.GetCheck(item);SetItemCheckState(item, !bCheck);}   }

/************************************************************************//* 根据选择的节点选中状态，设置相关节点的选中状态                   *//************************************************************************/void CHistoryDlg::SetItemCheckState(HTREEITEM item, BOOL bCheck){SetChildCheck(item, bCheck);SetParentCheck(item, bCheck);}

/************************************************************************//* 设置子节点的选中状态                                              *//************************************************************************/void CHistoryDlg::SetChildCheck(HTREEITEM item, BOOL bCheck){HTREEITEM child = m_ctrlTree.GetChildItem(item);while(child){m_ctrlTree.SetCheck(child, bCheck);SetChildCheck(child, bCheck);child = m_ctrlTree.GetNextItem(child, TVGN_NEXT);}}

/************************************************************************//* 设置父节点选中状态                                                 *//************************************************************************/void CHistoryDlg::SetParentCheck(HTREEITEM item, BOOL bCheck){HTREEITEM parent = m_ctrlTree.GetParentItem(item);if(parent == NULL)return;

if(bCheck)m_ctrlTree.SetCheck(parent, bCheck);else{HTREEITEM bro = m_ctrlTree.GetNextItem(item, TVGN_NEXT);BOOL bFlag = false;while(bro){if(m_ctrlTree.GetCheck(bro)){bFlag = true;break;}bro = m_ctrlTree.GetNextItem(bro, TVGN_NEXT);}if(!bFlag){bro = m_ctrlTree.GetNextItem(item, TVGN_PREVIOUS);while(bro){if(m_ctrlTree.GetCheck(bro)){bFlag = true;break;}bro = m_ctrlTree.GetNextItem(bro, TVGN_PREVIOUS);}}if(!bFlag)m_ctrlTree.SetCheck(parent, false);}SetParentCheck(parent, GetCheck(parent));}