CTreeCtrl使用总结

//*********************************************************
//
//设置TreeCtrl的风格
//
DWORD dwStyle = ::GetWindowLong(m_treeCtrl.GetSafeHwnd(), GWL_STYLE); 
dwStyle |= TVS_HASLINES;       //Has Lines : true
dwStyle |= TVS_HASBUTTONS;     //Has Buttons : true
dwStyle |= TVS_LINESATROOT;    //Lines At Root : true
::SetWindowLong(m_treeCtrl.GetSafeHwnd(), GWL_STYLE, dwStyle);

//*********************************************************
//
//插入Item
//
//(1)Tree Item纯文本形势
//函数原型:
HTREEITEM InsertItem(LPCTSTR lpszItem,
                     HTREEITEM hParent = TVI_ROOT,
                     HTREEITEM hInsertAfter = TVI_LAST);
//示例代码:
HTREEITEM hTreeItem;
hTreeItem = m_treeCtrl.InsertItem(TEXT("001"));
hTreeItem = m_treeCtrl.InsertItem(TEXT("002"));
m_treeCtrl.InsertItem(TEXT("003"), treeItem);

//(2)Tree Item中加入图片
//函数原型:
HTREEITEM InsertItem(LPCTSTR lpszItem,
                     int nImage,
                     int nSelectedImage,
                     HTREEITEM hParent = TVI_ROOT,
                     HTREEITEM hInsertAfter = TVI_LAST);
//示例代码:
CImageList m_imgList;   //对话框成员变量
m_imgList.Create(16, 16, ILC_COLOR32, 2, 1);    //Size: 16x16; nInitial=2; nGrow=1
m_imgList.Add(AfxGetApp()->LoadIcon(IDI_ICON_001));
m_treeCtrl.SetImageList(&m_imgList, TVSIL_NORMAL);

HTREEITEM hTreeItem;
hTreeItem = m_treeCtrl.InsertItem(TEXT("001"), 0, 1);
hTreeItem = m_treeCtrl.InsertItem(TEXT("002"), 0, 1);
m_treeTest.InsertItem(TEXT("003"), 0, 1, hTreeItem);

//*********************************************************
//
//删除Item
//
BOOL DeleteItem(HTREEITEM hItem);
BOOL DeleteAllItems();

//*********************************************************
//
//遍历某Tree Item下的所有子节点(需用到递归)
//
void fun(HTREEITEM hTreeItem)
{
    HTREEITEM hTreeChild = m_treeCtrl.GetChildItem(hTreeItem);
    while (hTreeChild != NULL)
    {
        doSomething(hTreeChild);
        if (m_treeCtrl.ItemHasChildren(hTreeChild))
        {
            fun(hTreeChild);    //递归调用
        }
        hTreeChild = m_treeCtrl.GetNextSiblingItem(hTreeChild);
    }
}

//
//遍历Tree Ctrl下的所有节点
//
HTREEITEM hRootItem = m_treeCtrl.GetRootItem();
while (hRootItem != NULL)
{
    doSomething(hRootItem);
    if ((m_treeCtrl.ItemHasChildren(hRootItem))
    {
        fun(hRootItem);
    }
    hRootItem = m_treeCtrl.GetNextSiblingItem(hRootItem);
}
//Note:GetRootItem()返回所有RootItem中的第一个
//     所以,遍历所有节点必须还要调用GetNextSiblingItem


//*********************************************************
//
//用代码选中某项或取消选中
//
m_treeCtrl.SetItemState(hItem, TVIS_SELECTED, TVIS_SELECTED);
m_treeCtrl.SetItemState(hItem, 0, TVIS_SELECTED);

//*********************************************************
//
//设置Item项的Image
//
BOOL SetItemImage(HTREEITEM hItem,
                  int nImage,
                  int nSelectedImage);

//*********************************************************
//
//Others
//
CString GetItemText(HTREEITEM hItem) const;
BOOL SetItemText(HTREEITEM hItem,
                 LPCTSTR lpszItem);

HTREEITEM GetSelectedItem( ) const;

DWORD_PTR GetItemData(HTREEITEM hItem) const;
BOOL SetItemData(HTREEITEM hItem,
                 DWORD_PTR dwData);

UINT GetCount() const;