CTreeCtrl基本使用

在OnInitDialog()函数中初始化CTreeCtrl
//初始化CTreeCtrl，为节点添加图片
//资源ID，显示的图标x轴像素，分组
m_pImage->Create(IDB_BITMAP1,24,2,RGB(255,255,255));
m_TreeCtrl.SetImageList(pImage,TVSIL_NORMAL);
//插入root节点
HTREEITEM hRoot = m_TreeCtrl.InsertItem(saValues1[0],0,0,TVI_ROOT,TVI_LAST);
m_TreeCtrl.SetItemData(hRoot,(DWORD)pmbgeo);
//插入叶节点
HTREEITEM ITEM = m_TreeCtrl.InsertItem(saValues2[0],2,2,hRoot,TVI_SORT);
m_TreeCtrl.SetItemData(ITEM,(DWORD)pgridgeo);
//展开节点
m_TreeCtrl.Expand(hRoot,TVE_EXPAND);
//显示第一个节点
HTREEITEM hItem = m_TreeCtrl.GetRootItem();
m_TreeCtrl.Select(hItem,TVGN_FIRSTVISIBLE);
//鼠标单击消息
OnClickTreeMaplist(NMHDR* pNMHDR, LRESULT* pResult)
{
BOOL bCheck ;
CPoint myPoint;
GetCursorPos(&myPoint) ;
m_TreeCtrl.ScreenToClient(&myPoint) ;
UINT uFlags;
//确定相对于工作区的树视图控件的指定点的位置
HTREEITEM hItem = m_TreeCtrl.HitTest(myPoint, &uFlags);

//获取复选框消息 -- TVHT_ONITEMSTATEICONif (hItem  && (TVHT_ONITEMSTATEICON & uFlags)){    //子节点状态随父节点    if (m_TreeCtrl.ItemHasChildren(hItem))  //父节点    {           bCheck = m_TreeCtrl.GetCheck(hItem); //获取当前复选状态        SetChildCheck(hItem,!bCheck); //设置子项复选状态        {            m_TreeCtrl.Expand(hItem,TVE_EXPAND);            hItem = m_TreeCtrl.GetChildItem(hItem); //获取子项句柄            while (hItem)            {                m_TreeCtrl.SetCheck(hItem, bCheck);                SetChildCheck(hItem,bCheck); //递归调用                hItem = m_TreeCtrl.GetNextSiblingItem(hItem); //获取兄弟的句柄            }        }    }    else    {        HTREEITEM hParent = m_TreeCtrl.GetParentItem(hItem);        CString str = m_TreeCtrl.GetItemText(hParent);        m_TreeCtrl.Select(hParent,TVGN_CARET);    }

}
//获取鼠标点击的节点和图标的消息 — TVHT_ONITEMLABEL|TVHT_ONITEMICON
if (hItem && (TVHT_ONITEMLABEL|TVHT_ONITEMICON & uFlags))
{
…

}//点击+-折叠展开树if (hItem && (TVHT_ONITEMBUTTON & uFlags)){    //获取Ctrl键是否被按住    short nState = GetKeyState(VK_CONTROL);    if (nState == -127 || nState == -128)    {        UINT nItemExpand = m_TreeCtrl.GetItemState(hItem,TVIS_EXPANDED);        if ((nItemExpand & TVIS_EXPANDED)!= TVIS_EXPANDED)  //树处于收缩状态        {            HTREEITEM hRoot = m_TreeCtrl.GetRootItem();            while(hRoot)            {                if (hRoot == hItem)                {                    //不处理已经点击+-的节点                    hRoot = m_TreeCtrl.GetNextItem(hRoot,TVGN_NEXT);                    continue;                }                UINT nExpand = m_TreeCtrl.GetItemState(hRoot,TVIS_EXPANDED);                //判断每个父节点的收缩状态                if ((nExpand & TVIS_EXPANDED)!=TVIS_EXPANDED)                {                    m_TreeCtrl.Expand(hRoot,TVE_EXPAND);                }                hRoot = m_TreeCtrl.GetNextItem(hRoot,TVGN_NEXT);            }        }        else    //处于展开状态        {            HTREEITEM hRoot = m_TreeCtrl.GetRootItem();            while(hRoot)            {                if (hRoot == hItem)                {                    hRoot = m_TreeCtrl.GetNextItem(hRoot,TVGN_NEXT);                    continue;                }                UINT nExpand = m_TreeCtrl.GetItemState(hRoot,TVIS_EXPANDED);                if ((nExpand & TVIS_EXPANDED)==TVIS_EXPANDED)                {                    //收缩节点  TVE_COLLAPSE                    m_TreeCtrl.Expand(hRoot,TVE_COLLAPSE);                }                hRoot = m_TreeCtrl.GetNextItem(hRoot,TVGN_NEXT);            }        }        m_TreeCtrl.Select(hItem,TVGN_CARET);    }   }

}
//鼠标双击节点消息
OnDblclkTreeMaplist(NMHDR* pNMHDR, LRESULT* pResult)
{
//*pResult返回TRUE可以屏蔽双击展开节点操作
*pResult = TRUE;
}