VC控件 TreeCtrl 与 ListCtrl 演示

下载源代码这个例子类似于 Windows 的资源管理器,程序运行界面如图一所示：图一主要用到的类有：CListCtrl,CTreeCtrl,CImageList,CFileFind 和函数SHGetFileInfo()简述步骤如下：1、增加 TreeCtrl 的 TVS_HASBUTTONS，TVS_HASLINES、TVS_LINESATROOT Style，代码如下：

    DWORD dwStyle = GetWindowLong(m_tree.m_hWnd,GWL_STYLE);     dwStyle |= TVS_HASBUTTONS | TVS_HASLINES | TVS_LINESATROOT;     SetWindowLong(m_tree.m_hWnd,GWL_STYLE,dwStyle);

2、为TreeCtrl添加Root项：

     m_hRoot = m_tree.InsertItem("我的电脑");      InsertItem()的函数原形为      HTREEITEM InsertItem( LPCTSTR lpszItem, HTREEITEM hParent = TVI_ROOT,      HTREEITEM hInsertAfter = TVI_LAST );     

3、获取本地逻辑驱动器,并添加：

    void CTreeViewDlg::GetLogicalDrives(HTREEITEM hParent)     {          size_t szAllDriveStrings = GetLogicalDriveStrings(0,NULL);        char *pDriveStrings = new char[szAllDriveStrings + sizeof(_T(""))];        GetLogicalDriveStrings(szAllDriveStrings,pDriveStrings);        size_t szDriveString = strlen(pDriveStrings);        while(szDriveString > 0)        {               m_tree.InsertItem(pDriveStrings,hParent);               pDriveStrings += szDriveString + 1;               szDriveString = strlen(pDriveStrings);        }     }      

4、添加TVN_EXPANDED消息处理函数,当一项展开时,为其子项添加下一级目录：

    void CTreeViewDlg::OnItemexpandedTree(NMHDR* pNMHDR, LRESULT* pResult)     {        NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;        // TODO: Add your control notification handler code here        TVITEM item = pNMTreeView->itemNew;        if(item.hItem == m_hRoot)        return;         HTREEITEM hChild = m_tree.GetChildItem(item.hItem);        while(hChild)        {               AddSubDir(hChild);               hChild = m_tree.GetNextItem(hChild,TVGN_NEXT);        }        *pResult = 0;     } 

AddSubDir函数功能添加子项,具体代码见示例。 5、添加TVN_SELCHANGED消息处理函数,在这个函数里,用GetFullPath()取得选中项的绝 路径(GetFullPath()具体代码看示例),在ListCtrl中添加文件而非文件夹的图标：

    void CTreeViewDlg::OnSelchangedTree(NMHDR* pNMHDR, LRESULT* pResult)     {        m_list.DeleteAllItems();        NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;        TVITEM item = pNMTreeView->itemNew;        if(item.hItem == m_hRoot)        return;        CString str = GetFullPath(item.hItem);         if(str.Right(1) != "//")           str += "//";        str += "*.*";        CFileFind file;        BOOL bContinue = file.FindFile(str);        while(bContinue)        {               bContinue = file.FindNextFile();               if(!file.IsDirectory() && !file.IsDots())               {                     SHFILEINFO info;                     CString temp = str;                     int index = temp.Find("*.*");                      temp.Delete(index,3);                     SHGetFileInfo(temp + file.GetFileName(),                     0,                     &info,sizeof(&info),                     SHGFI_DISPLAYNAME | SHGFI_ICON);                     int i = m_ImageList.Add(info.hIcon);                     m_list.InsertItem(i,info.szDisplayName,i);               }        }        *pResult = 0;     }