// GetPath returns the path name for true folders, and a null string // for virtual folders. CString CShellFolderView::GetPath(HTREEITEM hNode) { CString strPath(""); if(hNode == NULL) return strPath; // 对于虚拟文件夹返回空串 switch(((LPFOLDERNODE)(GetTreeCtrl().GetItemData(hNode)))->fType) { case ftNetworkNeighborhood: case ftNetNode: case ftRecycleBin: case ftMyComputer: return strPath; } // 对于真正的文件夹返回绝对路径 strPath = ((LPFOLDERNODE)(GetTreeCtrl().GetItemData(hNode)))->cPath; if(strPath.GetLength() > 0) // If path is null, it's a virtual folder { if(strPath.GetLength() < 3) // If the result is less than 3 bytes, strPath += "\\"; // It's the root -- add a "\". } return strPath; }// 对目录进行排序的回调函数 // The lParam1 and lParam2 parameters correspond to the lParam member // of the TVITEM structure for the two items being compared. // The lParamSort parameter corresponds to the lParam member of this structure.static int CALLBACK ShortItemProc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort) { CTreeCtrl* pCtrl = (CTreeCtrl*) lParamSort; LPFOLDERNODE lpfn1 = (LPFOLDERNODE)lParam1; LPFOLDERNODE lpfn2 = (LPFOLDERNODE)lParam2; if(lpfn1 == NULL || lpfn2 == NULL) return 0; // 虚拟文件夹排在前面,并且不改变原顺序 if((lpfn1->dwAttributes & SFGAO_FILESYSTEM) == 0 && (lpfn2->dwAttributes & SFGAO_FILESYSTEM) == 0) return 0; else if((lpfn1->dwAttributes & SFGAO_FILESYSTEM) == 0) return -1; else if((lpfn2->dwAttributes & SFGAO_FILESYSTEM)==0) return 1; // 真正的文件夹排在虚拟文件夹之后,且按字母顺序(不区分大小写) else if((lpfn1->dwAttributes & SFGAO_FOLDER) && (lpfn1->dwAttributes & SFGAO_FOLDER)) return stricmp(lpfn1->cPath, lpfn2->cPath); else if(lpfn1->dwAttributes & SFGAO_FOLDER) return -1; else if(lpfn2->dwAttributes & SFGAO_FOLDER) return 1; else // 其它的排在最后面,按字母序(不区分大小写) return stricmp(lpfn1->cPath, lpfn2->cPath); } // AttachFolders unconditionally attaches child folders to the // node passed in Node. If there are any, it also starts a thread // to watch for changes in the tree structure. BOOL CShellFolderView::AttachFolders(HTREEITEM hNode) { CWaitCursor cur; // 显示等待光标 BOOL bRet = FALSE; BOOL bChildren = TRUE; CTreeCtrl& tree = GetTreeCtrl(); tree.SetRedraw(FALSE); // 禁止控件更新窗口,以免插入时闪烁 //tree.EnableWindow(FALSE); CString strPath = GetPath(hNode); // The full path for the node. LPFOLDERNODE lpfn = (LPFOLDERNODE)tree.GetItemData(hNode); // If the node being expanded is a root, get the volume serial number // and lop off the backslash. if(strPath.GetLength() <= 3) { lpfn->Vol_Ser = GetVol_Ser(strPath); } // Enumerate the folder's contents. IEnumIDList* pEnum = NULL; if(lpfn->pShellFolder->EnumObjects(m_hWnd, SHCONTF_FOLDERS | SHCONTF_INCLUDEHIDDEN, &pEnum) == NOERROR) { bChildren = FALSE; pEnum->Reset(); // Reset the enumerate interface ULONG u = 1; // Enumerate context. LPITEMIDLIST lpidlChild = NULL; while(pEnum->Next(1, &lpidlChild, &u) == NOERROR) { // 为每个PIDL创建对应的树结点(包含其中的虚拟文件夹) HTREEITEM hChild = CreateFolderNode(lpidlChild, hNode, TRUE); // 释放PIDL m_pMalloc->Free(lpidlChild); if(hChild != NULL) { // 调整结点的类型 bChildren = TRUE; LPFOLDERNODE lpfnChild = (LPFOLDERNODE)tree.GetItemData(hChild); switch(lpfnChild->fType) { case ftMyComputer: case ftNetNode: lpfnChild->Vol_Ser = GetVol_Ser(lpfnChild->cPath); break; default: lpfnChild->Vol_Ser = lpfn->Vol_Ser; bRet = TRUE; break; } } } // 释放枚举接口 pEnum->Release(); } // 调整父结点的属性 TVITEM tvi; tvi.mask = TVIF_CHILDREN; tvi.cChildren = bChildren?1:0; tvi.hItem = hNode; tree.SetItem(&tvi); // Alphabetize the nodes, unless the parent is MyComputer or // Network Neighborhood. switch(lpfn->fType) { case ftMyComputer: case ftNetworkNeighborhood: break; default:{ // 排序所有子结点(根据给定的回调函数) TVSORTCB tvs; tvs.hParent = hNode; tvs.lpfnCompare = ShortItemProc; tvs.lParam = (LPARAM)&tree; tree.SortChildrenCB(&tvs); }break; } if(bRet) { // 如果还没有的话,则启动一个线程,开始监视该文件夹的变化 if(lpfn->pMonitorThread == NULL) { lpfn->pMonitorThread = new CFolderChangeMonitor(strPath, m_hWnd, (WPARAM)hNode); } } // 可以更新窗口了 tree.SetRedraw(TRUE); // tree.EnableWindow(TRUE); return bRet; } // This routine is used only for diskettes. It returns the volume serial // number of a disk in the drive--if there is no disk there, it returns // -1. It's used whenever the user clicks on a node, to determine whether // he has swapped diskettes, necessitating a discard of all nodes for the // affected drive. // For volumes other than diskettes, it returns a dummy value of 1, // as -1 is used to signify a diskette drive that isn't loaded. LONG CShellFolderView::GetVol_Ser(LPCTSTR strDriver) { LONG result = -1; // If there is no path it's My Computer -- exit now if(strlen(strDriver) == 0) return result; // If the driver isn't removeable, we dont have to do this CString strPath = strDriver[0] + ":\\"; strPath.MakeLower(); if(::GetDriveType(strPath) != DRIVE_REMOVABLE) { result = 1; return result; } // I f there's no disk in the drive, bail out with a result = -1. DWORD dwVSN, dwMCL, dwFSF; if(GetVolumeInformation(strPath, NULL, 0, &dwVSN, &dwMCL, &dwFSF, NULL, 0)) { result = (LONG) dwVSN; } else result = -1; return result; } // ShowDesktop is performed when Create posts a WM_SHOWDESKTOP // message, so we see the correct value of fFolderOptions. void CShellFolderView::ShowDesktop() { CTreeCtrl& tree = GetTreeCtrl(); PATHINFO PathInfo; GetSpecialFolder(CSIDL_DESKTOP, &PathInfo); //strDesktopPath = PathInfo.cPath; // 创建桌面这个根结点 HTREEITEM hDesktop = CreateFolderNode(PathInfo.pidl, NULL, TRUE); LPFOLDERNODE lpfn = (LPFOLDERNODE)tree.GetItemData(hDesktop); FILEPATHLIST fpl; GetLongFilePath(lpfn->pShellFolder, lpfn->pidl, &fpl); tree.SetItemText(hDesktop, fpl.cNormal); strcpy(lpfn->cPath , PathInfo.cPath); lpfn->fType = ftDesktop; // 展开桌面 AttachFolders(hDesktop); tree.Expand(hDesktop, TVE_EXPAND); }// 展开指定的结点,如果需要的话,附加创建其下子结点 int CShellFolderView::Expand(HTREEITEM hNode, UINT nCode) { if(GetTreeCtrl().GetChildItem(hNode) == NULL) { AttachFolders(hNode); } return GetTreeCtrl().Expand(hNode, nCode); }
1.SetCurPath : 设置选中一个路径.如果需要的话,它会展开相应有文件夹
2.GetSelectedDir : 返回当前选中的文件夹,没有选中的话,返回自然就是空串//////////////////////////////////////////////////////////////////////////
// ShellFolderView.h ---- 头文件
#if !defined(AFX_SHELLFOLDERVIEW_H__D30D10ED_3D11_4873_9909_146B8E18BEB1__INCLUDED_)
#define AFX_SHELLFOLDERVIEW_H__D30D10ED_3D11_4873_9909_146B8E18BEB1__INCLUDED_#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// ShellFolderView.h : header file
//**********************************************************************
// 该类根据DELPHI相应控件源代码改编
/***********************************************************************
简介:
CShellFolderView从CTreeView拜生,它显示整个WINDOWS的文件目录树.在WINDOWS中
又叫外壳名字空间(Shell Name Space).外壳名字空间是Windows下的标准文件系统，
它大大扩展了Dos文件系统，形成了以“桌面”（Desktop）为根的单一的文件系统
树，原有的Ｃ盘、Ｄ盘等目录树变成了“我的电脑”这一外壳名字空间子树的下一级
子树，而像“控制面板”、“回收站”、“网上邻居”等应用程序及“打印机”等设
备也被虚拟成了外壳名字空间中的节点。另外，与ＤＯＳ中物理存储只能和文件系统
项一一对应这一点不同的是，一个实际目录在外壳名字空间中可以表现为不同的项。
例如“我的文档”与“C:\My Documents”其实都指向“C:\My Documents”目录，但
它们在外壳名字空间中是不同的项。 外壳名字空间下的路径: PIDL
PIDL是一个元素类型为ITEMIDLIST结构的数组，数组中元素的个数是未知的，但紧接
着数组末尾的必是一个双字节的零。每个数组元素代表了外壳名字空间树中的一层（
即一个文件夹或文件），数组中的前一元素代表的是后一元素的父文件夹。由此可见，
PIDL实际上就是指向一块由若干个顺序排列的ITEMIDLIST结构组成、并在最后有一个
双字节零的空间的指针。所以PIDL的类型就被Windows定义为ITEMIDLIST结构的指针。 PIDL亦有“绝对路径”与“相对路径”的概念。表示“相对路径”的PIDL只有一个
ITEMIDLIST结构的元素，用于标识相对于父文件夹的“路径”；表示“绝对路径”的
PIDL（简称为“绝对PIDL”）有若干个ITEMIDLIST结构的元素，第一个元素表示外壳
名字空间根文件夹（“桌面”）下的某一子文件夹A，第二个元素则表示文件夹A下的
某一子文件夹B，其余依此类推。这样绝对PIDL就通过保存一条从“桌面”下的直接子
文件夹或文件的绝对PIDL与相对PIDL是相同的，而其他的文件夹或文件的相对PIDL就
只是其绝对PIDL的最后一部分了。由于所有的PIDL都是从桌面下的某一个子文件夹开
始的,所以对于桌面本身来说,它的PIDL数组显然一个元素都没有。这样就只剩下PIDL
数组最后的那个双字节的零了。所以，“桌面”的PIDL就是一个16位的零。 **********************************************************************/
// 监视指定的文件夹的变化的类. 该类由CShellFolderView专用,所以定义在源文件中
// 不对外部公开,在这里进行提前声明,因为下面要用到
class CFolderChangeMonitor; // 外壳名字空间下结点的串表示
typedef struct _FILEPATHLIST
{
char cNormal[MAX_PATH]; // 绝对名称(如,"我的电脑")
char cForParsing[MAX_PATH]; // 用来分析解释的名称, 可以根据它来产生PIDL
char cInFolder[MAX_PATH]; // 相对名称
} FILEPATHLIST, *LPFILEPATHLIST;// 文件夹的分类
typedef enum emFolderType{
ftFolder, // 文件夹
ftNetworkNeighborhood, // 网上邻居
ftRecycleBin, // 回收站
ftMyComputer, // 我的电脑
ftDesktop, // 桌面
ftNetNode, // 网络结点
ftNone // 空
}FOLDERTYPE;// 路径信息
typedef struct _PATHINFO{
char cPath[MAX_PATH]; // 路径
char cText[MAX_PATH]; // 名称
UINT uIconIndex; // 图标索引
UINT uSelectedIndex; // 选中时的图标索引
LPITEMIDLIST pidl; // PIDL
}PATHINFO,*LPPATHINFO;// 结点数据
typedef struct _FOLDERNODE{
char cPath[MAX_PATH]; // 路径
BOOL bHasParent; // 是否有父结点
LONG Vol_Ser; // 卷标
ULONG dwAttributes; // 属性
FOLDERTYPE fType; // 类型
IShellFolder* pShellFolder; // 指向该文件夹的IShellFolder接口
LPITEMIDLIST pidl; // 文件夹的PIDL
WORD widlen; // PIDL的长度
CFolderChangeMonitor* pMonitorThread; // 监视文件夹变化的线程
}FOLDERNODE, *LPFOLDERNODE;
/////////////////////////////////////////////////////////////////////////////
// CShellFolderView viewclass CShellFolderView : public CTreeView
{
protected:
CShellFolderView(); // protected constructor used by dynamic creation
DECLARE_DYNCREATE(CShellFolderView)// Attributes
public:// Operations
public:
BOOL SetCurPath(LPCTSTR lpszPath); // 设置当前选中的文件夹, 成功返回TRUE
CString GetSelectedDir(); // 取得当前选中的文件夹,没有则返回一个空串// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CShellFolderView)
protected:
//virtual void OnDraw(CDC* pDC); // overridden to draw this view
//}}AFX_VIRTUAL// Implementation
protected:
virtual ~CShellFolderView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif // Generated message map functions
protected:
//{{AFX_MSG(CShellFolderView)
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
afx_msg void OnItemexpanding(NMHDR* pNMHDR, LRESULT* pResult);
afx_msg void OnDestroy();
//}}AFX_MSG
afx_msg LRESULT OnFolderChanged(WPARAM wParam, LPARAM); // 处理文件夹发生变化的消息
DECLARE_MESSAGE_MAP()
private:
IMalloc* m_pMalloc; // COM内存分配接口用来分配和回收PIDL使用的空间
protected:
void GetSpecialFolder(int nFolder, LPPATHINFO lppi); // 取得指定的特殊文件夹的信息
void GetNetHood(LPPATHINFO lpPI); // 取得网上邻居结点
// 创建一个结点
HTREEITEM CreateFolderNode(LPITEMIDLIST lpidl, HTREEITEM hParent, BOOL bVirtual);
CString GetPath(HTREEITEM hNode); // 取得结点的对应的路径
BOOL AttachFolders(HTREEITEM hNode); // 展开指定的结点下的子结点
LONG GetVol_Ser(LPCTSTR strDriver); // 获取卷标
void ShowDesktop(); // 显示桌面
void RetrieveSysImageList(); // 获取系统图像列表
void FreeNode(HTREEITEM hNode); // 释放结点
void FreeNodeData(LPFOLDERNODE lpfn); // 释放结点数据
int Expand(HTREEITEM hNode, UINT nCode); // 展开结点};
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.#endif // !defined(AFX_SHELLFOLDERVIEW_H__D30D10ED_3D11_4873_9909_146B8E18BEB1__INCLUDED_) ///////////////////////////////////////////////////////////////////////////
// ShellFolderView.cpp : implementation file
///////////////////////////////////////////////////////////////////////////#include "stdafx.h"
#include "ShellFolderView.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif#define WM_U_FOLDERCHANGED (WM_USER+215) // 消息// 一些固定的名字:
static const char c_cMyComputer[] = "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}"; // Normal = 我的电脑
static const char c_cNetworkNeighborhood[] = "::{208D2C60-3AEA-1069-A2D7-08002B30309D}"; // Normal = 网上邻居
static const char c_cRecycleBin[] = "::{645FF040-5081-101B-9F08-00AA002F954E}"; // Normal = 回收站
static const char c_cController[] = "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\\::{21EC2020-3AEA-1069-A2DD-08002B30309D}"; // Normal = 控制面板
static const char c_cPrinter[] = "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\\::{21EC2020-3AEA-1069-A2DD-08002B30309D}\\::{2227A280-3AEA-1069-A2DE-08002B30309D}"; // Normal = 打印机
static const char c_cDial[] = "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\\::{21EC2020-3AEA-1069-A2DD-08002B30309D}\\::{7007ACC7-3202-11D1-AAD2-00805FC1270E}"; // Normal = 网络和拨号连接
static const char c_cFonts[] = "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\\::{21EC2020-3AEA-1069-A2DD-08002B30309D}\\::{D20EA4E1-3957-11D2-A40B-0C5020524152}"; // Normal = 字体
static const char c_cManager[] = "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\\::{21EC2020-3AEA-1069-A2DD-08002B30309D}\\::{D20EA4E1-3957-11D2-A40B-0C5020524153}"; // Normal = 管理工具
static const char c_cPlans[] = "::{20D04FE0-3AEA-1069-A2D8-08002B30309D}\\::{21EC2020-3AEA-1069-A2DD-08002B30309D}\\::{D6277990-4C6A-11CF-8D87-00AA0060F5BF}"; // Normal = 任务计划// 文件夹监视线程类
class CFolderChangeMonitor
{
public:
CFolderChangeMonitor(LPCTSTR lpszPath, HWND hWnd, WPARAM wParam);
~CFolderChangeMonitor();private:
CWinThread* m_pThread;
CString m_strPath;
HWND m_hWnd;
WPARAM m_wParam;
BOOL m_bStop; friend UINT MonitorProc(void* lp);
void Run();
};/////////////////////////////////////////////////////////////////////////////
// CFolderChangeMonitor class
/////////////////////////////////////////////////////////////////////////////
// 文件夹监视线程类的构造函数
// lpszPath : 被监视的文件夹
// hWnd : 文件夹已经改变的消息将发往该窗口
// wParam : 消息的参数,在这里是树上的一结点句柄
CFolderChangeMonitor::CFolderChangeMonitor(LPCTSTR lpszPath, HWND hWnd, WPARAM wParam)
:m_hWnd(hWnd), m_wParam(wParam), m_strPath(lpszPath)
{
m_bStop = FALSE;
// 开始监视线程
m_pThread = AfxBeginThread(MonitorProc, (void*)this);
}CFolderChangeMonitor::~CFolderChangeMonitor()
{
// 停止监视线程
m_bStop = TRUE;
// 原来可以等待线程结束后才返回,后来不知道怎么搞的,居然会死锁,只好先不等待了,嘻嘻
// ::WaitForSingleObject(m_pThread->m_hThread, INFINITE);
}// 监视线程函数
UINT MonitorProc(void*lp)
{
if(lp)
{
// 将线程反调回类中
((CFolderChangeMonitor*)lp)->Run();
}
return 0;
}// 监视函数
void CFolderChangeMonitor::Run()
{
// 检测结束标志, 没有就一直循环
while(!m_bStop)
{
// 创建事件句柄,当文件夹发生了指定的变化时,该事件被触发
HANDLE handle = ::FindFirstChangeNotification(m_strPath, FALSE,
FILE_NOTIFY_CHANGE_DIR_NAME);
// 如果事件创建不成功则结束
if(handle == INVALID_HANDLE_VALUE) break; // 开始监视
if(::FindNextChangeNotification(handle))
{
int i = WAIT_TIMEOUT;
// 除非指明结束监视或者发生了一次事件,否则一直循环等待
while(i == WAIT_TIMEOUT && !m_bStop)
{
// 等待事件发生(每次等待20mS)因为线程需要不断检测m_bStop
// 标志,以便及时退出,所以不能无限制地等待下去
i = ::WaitForSingleObject(handle, 20);
}
// 循环结束,如果不是指定结束,则一定是发事件被触发了
if(!m_bStop)
{
// 发送消息通知窗口来更新目录树
::SendMessage(m_hWnd, WM_U_FOLDERCHANGED, m_wParam,0);
}
}
else
{
// 监视不能开始,则退出
::FindCloseChangeNotification(handle);
break;
}
// 关闭事件
::FindCloseChangeNotification(handle);
}
}
/***************************************************************
FUNCTION : GetName 描述：lpio lpsf所指的IshellFolder接口代表的文件夹下的相对PIDL，
本函数获得lpi所指项的显示名称，dwFlags表明欲得到的显示名称类型，
lpFriendlyName为存放显示名称的缓冲区。
***************************************************************/BOOL GetName(LPSHELLFOLDER lpsf,LPITEMIDLIST lpi,DWORD dwFlags,LPSTR lpFriendlyName)
{
STRRET str;
AGAIN:
//得到显示名称
if(NOERROR!=lpsf->GetDisplayNameOf(lpi,dwFlags,&str))
return FALSE; //根据返回值进行转换
switch(str.uType)
{
case STRRET_WSTR: //如为Unicode字符串，则转成Ansi字符集的字符串case STRRET_WSTR:
if(str.pOleStr != NULL)
WideCharToMultiByte(CP_ACP,0,str.pOleStr,-1,lpFriendlyName,MAX_PATH,NULL,NULL);
else if(dwFlags == SHGDN_NORMAL)
{
dwFlags = SHGDN_FORPARSING;
goto AGAIN;
}
break;
case STRRET_OFFSET: //如为偏移量，则去除偏移量
lstrcpy(lpFriendlyName,(LPSTR)lpi+str.uOffset);
break;
case STRRET_CSTR: // 如为Ansi字符串，则直接拷贝
lstrcpy(lpFriendlyName,(LPSTR)str.cStr);
break;
default: //非法情况
return FALSE; } return TRUE;
}// 获取路径
void GetLongFilePath(IShellFolder* pShellFolder, LPITEMIDLIST lpidl, LPFILEPATHLIST lpfpl)
{
BOOL bRelease = FALSE;
// 如果IShellFolder接口为空,则使用桌面的IShellFolder接口
if(pShellFolder == NULL)
{
if(SHGetDesktopFolder(&pShellFolder) != NOERROR)
return;
bRelease = TRUE;
}
// 取得显示, PIDL及相对名称
GetName(pShellFolder, lpidl, SHGDN_NORMAL, lpfpl->cNormal);
GetName(pShellFolder, lpidl, SHGDN_FORPARSING, lpfpl->cForParsing);
GetName(pShellFolder, lpidl, SHGDN_INFOLDER, lpfpl->cInFolder); // 取得的COM接口一定要释放
if(bRelease) pShellFolder->Release();
}
/////////////////////////////////////////////////////////////////////////////
// CShellFolderViewIMPLEMENT_DYNCREATE(CShellFolderView, CTreeView)CShellFolderView::CShellFolderView()
{
// 取得内存分配的COM接口, 这里一定要成功,否则接下来的程序中无法分配空间
VERIFY(SHGetMalloc(&m_pMalloc)==NOERROR);
}CShellFolderView::~CShellFolderView()
{
// 释放IMalloc接口
m_pMalloc->Release();
}
BEGIN_MESSAGE_MAP(CShellFolderView, CTreeView)
//{{AFX_MSG_MAP(CShellFolderView)
ON_WM_CREATE()
ON_NOTIFY_REFLECT(TVN_ITEMEXPANDING, OnItemexpanding)
ON_WM_DESTROY()
//}}AFX_MSG_MAP
ON_MESSAGE(WM_U_FOLDERCHANGED, OnFolderChanged)
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CShellFolderView drawing//void CShellFolderView::OnDraw(CDC* pDC)
//{
// CDocument* pDoc = GetDocument();
// TODO: add draw code here
//}/////////////////////////////////////////////////////////////////////////////
// CShellFolderView diagnostics#ifdef _DEBUG
void CShellFolderView::AssertValid() const
{
CTreeView::AssertValid();
}void CShellFolderView::Dump(CDumpContext& dc) const
{
CTreeView::Dump(dc);
}
#endif //_DEBUG/////////////////////////////////////////////////////////////////////////////
// CShellFolderView message handlersint CShellFolderView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CTreeView::OnCreate(lpCreateStruct) == -1)
return -1;
// TODO: Add your specialized creation code here
// 设置树控件的风格:带有展开按钮,结点间有连线
GetTreeCtrl().ModifyStyle(0, TVS_HASLINES|TVS_HASBUTTONS|TVS_LINESATROOT);
RetrieveSysImageList(); // 取得系统图标列表
// 显示桌面虚拟文件夹
ShowDesktop(); return 0;
}// 当某个结点将要被展开前
void CShellFolderView::OnItemexpanding(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;
// TODO: Add your control notification handler code here
// 如果是展开操作
if(pNMTreeView->action == TVE_EXPAND)
{
// 如果被展开的结点还没有子结点则为该结点附加它的子结点
// 我们不能一开始就将所有的结点添加上去,这将是一个漫长的过程,且浪费
// 大量的系统资源,只有那些被展开的结点才需要显示其子结点
if(GetTreeCtrl().GetChildItem(pNMTreeView->itemNew.hItem) == NULL)
{
AttachFolders(pNMTreeView->itemNew.hItem);
}
}
*pResult = 0;
*pResult = 0;
}void CShellFolderView::OnDestroy()
{
// 释放所有的结点
FreeNode(NULL); CTreeView::OnDestroy();
}// 当被监视的文件夹发生变化时,该消息被监视线程发送过来
LRESULT CShellFolderView::OnFolderChanged(WPARAM wParam, LPARAM)
{
// 变化对应的结点句柄
HTREEITEM hNode = (HTREEITEM)wParam;
CTreeCtrl& tree = GetTreeCtrl(); // 视图上的树控件
// 保存该结点的状态(是否是已经展开的)
BOOL bExpanded = tree.GetItemState(hNode, TVIS_EXPANDED) == TVIS_EXPANDED;
// 它的子结点
HTREEITEM hChild = tree.GetChildItem(hNode);
// 删除该结点下的所有子结点
while(hChild != NULL)
{
HTREEITEM hCur = hChild;
hChild = tree.GetNextSiblingItem(hChild); // 下一个子结点
FreeNode(hCur);
tree.DeleteItem(hCur);
} // 重新生成子结点.
AttachFolders(hNode);
// 恢复展开状态(如果以前是展开的)
if(bExpanded) tree.Expand(hNode, TVE_EXPAND); return 0;
}
//////////////////////////////////////////////////////////////////
// protected member function// 获取系统图标列表
void CShellFolderView::RetrieveSysImageList()
{
PATHINFO DesktopInfo;
SHFILEINFO FileInfo;
CString strDesktop;
GetSpecialFolder(CSIDL_DESKTOPDIRECTORY, &DesktopInfo);
// SHGetFileInfo函数的返回值就是系统图标列表的句柄(可参考MSDN)
HIMAGELIST hSysImageList = (HIMAGELIST)::SHGetFileInfo(
(LPCTSTR)DesktopInfo.pidl, 0, &FileInfo, sizeof(FileInfo),
SHGFI_PIDL | SHGFI_SYSICONINDEX | SHGFI_SMALLICON);
// 设置重叠图标
// 设置1号重叠图标对应图标列表中索引为0的图标,这是一个手托,象征被共享的文件夹
// 设置2号重叠图标对应图标列表中索引为1的图标,这是一个箭头,象征快捷方式
// 设置3号重叠图标对应图标列表中索引为2的图标,这个图标我研究了好长时间也没看出来是个什么东东
ImageList_SetOverlayImage(hSysImageList, 0,1);
ImageList_SetOverlayImage(hSysImageList, 1,2);
ImageList_SetOverlayImage(hSysImageList, 2,3);
// 树控件就使用这个图标列表
GetTreeCtrl().SetImageList(CImageList::FromHandle(hSysImageList),TVSIL_NORMAL);}// 获取特殊的文件夹信息
void CShellFolderView::GetSpecialFolder(int nFolder, LPPATHINFO lppi)
{
LPITEMIDLIST lpidl = NULL;
// 取得该文件夹的PIDL
if(SUCCEEDED(SHGetSpecialFolderLocation(m_hWnd, nFolder, &lpidl)))
{
lppi->pidl = lpidl; // Get the actual path of the directory from the PItemIDList
SHGetPathFromIDList(lpidl, lppi->cPath); // Do it // Get the Normal Image index
SHFILEINFO shfi;
SHGetFileInfo((LPCTSTR)lpidl, SFGAO_SHARE, &shfi, sizeof(shfi),
SHGFI_PIDL | SHGFI_SYSICONINDEX);
lppi->uIconIndex = shfi.iIcon; // Get the selected image index
SHGetFileInfo((LPCTSTR)lpidl, SFGAO_SHARE, &shfi, sizeof(shfi),
SHGFI_PIDL | SHGFI_SYSICONINDEX | SHGFI_OPENICON);
lppi->uSelectedIndex = shfi.iIcon;
}
}void CShellFolderView::GetNetHood(LPPATHINFO lpPI)
{
FILEPATHLIST fpl;
GetSpecialFolder(CSIDL_NETWORK, lpPI);
GetLongFilePath(NULL, lpPI->pidl, &fpl);
strcpy(lpPI->cText, fpl.cNormal);
}// CreateFolderNode creates a Folder_Node and inserts it under
// the "parent" node (if any), using the last of the path
// string as the Name, and setting the new node's text
// property to match.
HTREEITEM CShellFolderView::CreateFolderNode(
LPITEMIDLIST lpidl, // 文件夹的PIDL
HTREEITEM hParent, // 父结点
BOOL bVirtual) // 是否包含虚拟文件夹
{
CTreeCtrl& tree = GetTreeCtrl();
LPFOLDERNODE lpfnParent = NULL;
FILEPATHLIST fpl; // 父结点的信息
if(hParent != NULL)
{
lpfnParent = (LPFOLDERNODE)tree.GetItemData(hParent);
GetLongFilePath(lpfnParent->pShellFolder, lpidl, &fpl);
}
else
{
GetLongFilePath(NULL, lpidl, &fpl);
} CString strFileName(fpl.cInFolder); // 相对名字
CString strPath(fpl.cForParsing); // 法定名字 // 以"::"开头的,是一些特殊的文件夹,普通的目录或文件的名称中是不能包含":"字符的
// 打印出来看看都是些什么东东
if(strncmp(fpl.cForParsing, "::", 2) ==0)
{
TRACE3("<%s> = \"%s\"; // Normal = %s\n", fpl.cInFolder, fpl.cForParsing, fpl.cNormal);
} // 取得属性
ULONG Attributes = SFGAO_SHARE | SFGAO_FILESYSTEM |
SFGAO_LINK | SFGAO_HASSUBFOLDER;
if(lpfnParent == NULL ||
lpfnParent->pShellFolder->GetAttributesOf(
1, (LPCITEMIDLIST*)&lpidl, &Attributes) != NOERROR)
{
Attributes = 0;
//lpfnParent = NULL;
} // 是否是一个虚拟文件夹
BOOL bVirFolder = ((Attributes & SFGAO_FILESYSTEM) == 0); if(lpfnParent != NULL)
{
switch(lpfnParent->fType)
{
case ftNetworkNeighborhood:
case ftNetNode:
bVirFolder = TRUE;
}
}
if(!bVirtual && bVirFolder)
return NULL; // 生成该文件夹的绝对PIDL,方法就是将相对PIDL附加到父PIDL后
WORD wParentPIDLLen = 0;
LPITEMIDLIST lpidlParent = NULL;
if(lpfnParent != NULL)
{
wParentPIDLLen = lpfnParent->widlen;
lpidlParent = lpfnParent->pidl;
} WORD pidlen = lpidl->mkid.cb;
// 使用IMalloc接口分配新PIDL需要的空间.因为从系统API返回的PIDL
// 都是通过IMalloc接口分配的空间,所以为了统一,这里也使用IMalloc来分配空间
LPITEMIDLIST lpidlNew = (LPITEMIDLIST)m_pMalloc->Alloc(pidlen + wParentPIDLLen + 2); if(wParentPIDLLen != 0)
{
memcpy(lpidlNew, lpidlParent, wParentPIDLLen);
memcpy((char*)lpidlNew+wParentPIDLLen, lpidl,pidlen);
}
else
{
memcpy(lpidlNew, lpidl, pidlen);
} *(WORD*)((char*)lpidlNew + wParentPIDLLen + pidlen) = 0; LPITEMIDLIST lpidlTemp = /*bVirFolder ? lpidl : */lpidlNew; // 获取图标索引
SHFILEINFO shfi;
UINT uIcon, uSelectedIcon;
::SHGetFileInfo((LPCTSTR)lpidlTemp, SFGAO_SHARE, &shfi, sizeof(shfi),
SHGFI_PIDL | SHGFI_SYSICONINDEX);
uIcon = uSelectedIcon = shfi.iIcon;
//if((Attributes & SFGAO_FOLDER) == SFGAO_FOLDER)
{
::SHGetFileInfo((LPCTSTR)lpidlTemp, SFGAO_SHARE, &shfi, sizeof(shfi),
SHGFI_PIDL | SHGFI_SYSICONINDEX | SHGFI_OPENICON);
uSelectedIcon = shfi.iIcon;
} // 一个新的结点
LPFOLDERNODE lpNewNode = new FOLDERNODE;
lpNewNode->widlen = wParentPIDLLen + pidlen;
lpNewNode->pidl = lpidlNew;
strcpy(lpNewNode->cPath, (LPCTSTR)strPath);
lpNewNode->bHasParent = (hParent != NULL);
//lpNewNode->pChangeThread = NULL;
//lpNewNode->VolSer = 1;
// 结点的类型(只要和几个固定的名字比较一下啦)
if(strPath.Compare(c_cMyComputer) == 0)
lpNewNode->fType = ftMyComputer;
else if(strPath.Compare(c_cNetworkNeighborhood) == 0)
lpNewNode->fType = ftNetworkNeighborhood;
else if(strPath.Compare(c_cRecycleBin) == 0)
lpNewNode->fType = ftRecycleBin;
else
lpNewNode->fType = ftFolder;
lpNewNode->dwAttributes = Attributes;
lpNewNode->pMonitorThread = NULL; // 获取该文件夹对应的IShellFolder接口
// If this Node has no parent, it mut be the Desktop.
if(lpfnParent != NULL)
{
lpfnParent->pShellFolder->BindToObject(lpidl, NULL, IID_IShellFolder,
(void**)&lpNewNode->pShellFolder);
//if(lpfnParent->fType == ftNetworkNeighborhood)
//{
// lpNewNode->fType = ftNetNode;
// sprintf(lpNewNode->cPath, "\\\\%s", (LPCTSTR)strFileName);
//} }
else
{
// 桌面的IShellFolder
::SHGetDesktopFolder(&lpNewNode->pShellFolder);
} // 插入树结点
TVINSERTSTRUCT tvis;
tvis.item.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE |
TVIF_STATE | TVIF_PARAM;
// 如果该文件夹包含子文件夹,则对应的树结点也应该有子结点
if(Attributes & SFGAO_HASSUBFOLDER)
{
tvis.item.mask |= TVIF_CHILDREN;
// 使用 I_CHILDRENCALLBACK 值告诉控件,该结点有子结点,但具体的结点还没给出
// 当该结点被展开时就会通知父窗口.这时你应该为该结点添加子结点
tvis.item.cChildren = I_CHILDRENCALLBACK;
} // 设置覆盖图标
if(Attributes & SFGAO_SHARE) // 共享的
tvis.item.state = INDEXTOOVERLAYMASK(1);
else if(Attributes & SFGAO_LINK) // 快捷方式
tvis.item.state = INDEXTOOVERLAYMASK(2);
else // 其它的
tvis.item.state = INDEXTOOVERLAYMASK(0); tvis.item.stateMask = TVIS_OVERLAYMASK; // 指明状太标志包含覆盖图标
tvis.item.iImage = uIcon; // 正常图标
tvis.item.iSelectedImage = uSelectedIcon;// 选中时的图标
//CString strTemp = strFileName + "(" + strPath + ")"; // 看看它的完整路径
tvis.item.pszText = (char*)fpl.cNormal; // 标题
tvis.hParent = hParent; // 父结点
tvis.hInsertAfter = TVI_LAST; // 插入到其它兄弟结点的后面
tvis.item.lParam = (DWORD)lpNewNode; // 自定义的结点数据 HTREEITEM hIns = tree.InsertItem(&tvis); // 插入该结点 if(hIns == NULL) // 插入失败??不大可能的事
FreeNodeData(lpNewNode); return hIns; // 返回新结点句柄
}
// GetPath returns the path name for true folders, and a null string
// for virtual folders.
CString CShellFolderView::GetPath(HTREEITEM hNode)
{
CString strPath(""); if(hNode == NULL) return strPath; // 对于虚拟文件夹返回空串
switch(((LPFOLDERNODE)(GetTreeCtrl().GetItemData(hNode)))->fType)
{
case ftNetworkNeighborhood:
case ftNetNode:
case ftRecycleBin:
case ftMyComputer:
return strPath;
} // 对于真正的文件夹返回绝对路径
strPath = ((LPFOLDERNODE)(GetTreeCtrl().GetItemData(hNode)))->cPath; if(strPath.GetLength() > 0) // If path is null, it's a virtual folder
{
if(strPath.GetLength() < 3) // If the result is less than 3 bytes,
strPath += "\\"; // It's the root -- add a "\".
} return strPath;
}// 对目录进行排序的回调函数
// The lParam1 and lParam2 parameters correspond to the lParam member
// of the TVITEM structure for the two items being compared.
// The lParamSort parameter corresponds to the lParam member of this structure.static int CALLBACK ShortItemProc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
{
CTreeCtrl* pCtrl = (CTreeCtrl*) lParamSort; LPFOLDERNODE lpfn1 = (LPFOLDERNODE)lParam1;
LPFOLDERNODE lpfn2 = (LPFOLDERNODE)lParam2;
if(lpfn1 == NULL || lpfn2 == NULL) return 0; // 虚拟文件夹排在前面,并且不改变原顺序
if((lpfn1->dwAttributes & SFGAO_FILESYSTEM) == 0 &&
(lpfn2->dwAttributes & SFGAO_FILESYSTEM) == 0)
return 0;
else if((lpfn1->dwAttributes & SFGAO_FILESYSTEM) == 0)
return -1;
else if((lpfn2->dwAttributes & SFGAO_FILESYSTEM)==0)
return 1;
// 真正的文件夹排在虚拟文件夹之后,且按字母顺序(不区分大小写)
else if((lpfn1->dwAttributes & SFGAO_FOLDER) &&
(lpfn1->dwAttributes & SFGAO_FOLDER))
return stricmp(lpfn1->cPath, lpfn2->cPath);
else if(lpfn1->dwAttributes & SFGAO_FOLDER)
return -1;
else if(lpfn2->dwAttributes & SFGAO_FOLDER)
return 1;
else
// 其它的排在最后面,按字母序(不区分大小写)
return stricmp(lpfn1->cPath, lpfn2->cPath);
}
// AttachFolders unconditionally attaches child folders to the
// node passed in Node. If there are any, it also starts a thread
// to watch for changes in the tree structure.
BOOL CShellFolderView::AttachFolders(HTREEITEM hNode)
{
CWaitCursor cur; // 显示等待光标
BOOL bRet = FALSE; BOOL bChildren = TRUE;
CTreeCtrl& tree = GetTreeCtrl();
tree.SetRedraw(FALSE); // 禁止控件更新窗口,以免插入时闪烁
//tree.EnableWindow(FALSE); CString strPath = GetPath(hNode); // The full path for the node.
LPFOLDERNODE lpfn = (LPFOLDERNODE)tree.GetItemData(hNode); // If the node being expanded is a root, get the volume serial number
// and lop off the backslash.
if(strPath.GetLength() <= 3)
{
lpfn->Vol_Ser = GetVol_Ser(strPath);
} // Enumerate the folder's contents.
IEnumIDList* pEnum = NULL;
if(lpfn->pShellFolder->EnumObjects(m_hWnd, SHCONTF_FOLDERS | SHCONTF_INCLUDEHIDDEN,
&pEnum) == NOERROR)
{
bChildren = FALSE;
pEnum->Reset(); // Reset the enumerate interface
ULONG u = 1; // Enumerate context.
LPITEMIDLIST lpidlChild = NULL;
while(pEnum->Next(1, &lpidlChild, &u) == NOERROR)
{
// 为每个PIDL创建对应的树结点(包含其中的虚拟文件夹)
HTREEITEM hChild = CreateFolderNode(lpidlChild, hNode, TRUE);
// 释放PIDL
m_pMalloc->Free(lpidlChild);
if(hChild != NULL)
{
// 调整结点的类型
bChildren = TRUE;
LPFOLDERNODE lpfnChild = (LPFOLDERNODE)tree.GetItemData(hChild);
switch(lpfnChild->fType)
{
case ftMyComputer:
case ftNetNode:
lpfnChild->Vol_Ser = GetVol_Ser(lpfnChild->cPath);
break;
default:
lpfnChild->Vol_Ser = lpfn->Vol_Ser;
bRet = TRUE;
break;
}
}
}
// 释放枚举接口
pEnum->Release();
}
// 调整父结点的属性
TVITEM tvi;
tvi.mask = TVIF_CHILDREN;
tvi.cChildren = bChildren?1:0;
tvi.hItem = hNode;
tree.SetItem(&tvi); // Alphabetize the nodes, unless the parent is MyComputer or
// Network Neighborhood.
switch(lpfn->fType)
{
case ftMyComputer:
case ftNetworkNeighborhood:
break;
default:{ // 排序所有子结点(根据给定的回调函数)
TVSORTCB tvs;
tvs.hParent = hNode;
tvs.lpfnCompare = ShortItemProc;
tvs.lParam = (LPARAM)&tree;
tree.SortChildrenCB(&tvs);
}break;
} if(bRet)
{
// 如果还没有的话,则启动一个线程,开始监视该文件夹的变化
if(lpfn->pMonitorThread == NULL)
{
lpfn->pMonitorThread = new CFolderChangeMonitor(strPath, m_hWnd, (WPARAM)hNode);
}
} // 可以更新窗口了
tree.SetRedraw(TRUE);
// tree.EnableWindow(TRUE);
return bRet;
}
// This routine is used only for diskettes. It returns the volume serial
// number of a disk in the drive--if there is no disk there, it returns
// -1. It's used whenever the user clicks on a node, to determine whether
// he has swapped diskettes, necessitating a discard of all nodes for the
// affected drive.
// For volumes other than diskettes, it returns a dummy value of 1,
// as -1 is used to signify a diskette drive that isn't loaded.
LONG CShellFolderView::GetVol_Ser(LPCTSTR strDriver)
{
LONG result = -1; // If there is no path it's My Computer -- exit now
if(strlen(strDriver) == 0)
return result; // If the driver isn't removeable, we dont have to do this
CString strPath = strDriver[0] + ":\\";
strPath.MakeLower(); if(::GetDriveType(strPath) != DRIVE_REMOVABLE)
{
result = 1;
return result;
}
// I f there's no disk in the drive, bail out with a result = -1.
DWORD dwVSN, dwMCL, dwFSF;
if(GetVolumeInformation(strPath, NULL, 0, &dwVSN, &dwMCL, &dwFSF, NULL, 0))
{
result = (LONG) dwVSN;
}
else
result = -1;
return result;
}
// ShowDesktop is performed when Create posts a WM_SHOWDESKTOP
// message, so we see the correct value of fFolderOptions.
void CShellFolderView::ShowDesktop()
{
CTreeCtrl& tree = GetTreeCtrl(); PATHINFO PathInfo;
GetSpecialFolder(CSIDL_DESKTOP, &PathInfo);
//strDesktopPath = PathInfo.cPath; // 创建桌面这个根结点
HTREEITEM hDesktop = CreateFolderNode(PathInfo.pidl, NULL, TRUE);
LPFOLDERNODE lpfn = (LPFOLDERNODE)tree.GetItemData(hDesktop);
FILEPATHLIST fpl;
GetLongFilePath(lpfn->pShellFolder, lpfn->pidl, &fpl);
tree.SetItemText(hDesktop, fpl.cNormal);
strcpy(lpfn->cPath , PathInfo.cPath);
lpfn->fType = ftDesktop; // 展开桌面
AttachFolders(hDesktop); tree.Expand(hDesktop, TVE_EXPAND);
}// 展开指定的结点,如果需要的话,附加创建其下子结点
int CShellFolderView::Expand(HTREEITEM hNode, UINT nCode)
{
if(GetTreeCtrl().GetChildItem(hNode) == NULL)
{
AttachFolders(hNode);
}
return GetTreeCtrl().Expand(hNode, nCode);
}
// 将路径转化为PIDL,如果失败,返回NULL
LPITEMIDLIST PathToIDList(LPCTSTR lpszPath)
{
OLECHAR szOleStr[MAX_PATH];
IShellFolder* pDesktop = NULL;
LPITEMIDLIST lpidl = NULL;
// 使用桌面的IShellFolder来转换,这将生成一个绝对的PIDL
if(SHGetDesktopFolder(&pDesktop) != NOERROR)
return NULL; // 将路径转换成宽字符格式
MultiByteToWideChar(CP_ACP,MB_PRECOMPOSED, lpszPath, -1,
szOleStr, sizeof(szOleStr));
// 转换路径
pDesktop->ParseDisplayName(NULL, NULL, szOleStr, NULL, &lpidl, NULL); // 释放接口
pDesktop->Release(); return lpidl;
}// PIDL中的下一个结构
inline LPITEMIDLIST PIDL_Next(LPITEMIDLIST p)
{
return (LPITEMIDLIST)((DWORD)p + p->mkid.cb);
}// 求指定的PIDL的长度,不包括结尾的两个字节的0
inline int PIDL_Len(LPITEMIDLIST p)
{
WORD wLen = 0;
// 累加所有的单元结构尺寸
while(p && p->mkid.cb != 0)
{
wLen += p->mkid.cb;
p = PIDL_Next(p);
}
return wLen;
}
// 设置当前目录
BOOL CShellFolderView::SetCurPath(LPCTSTR lpszPath)
{
// 解释路径为PIDL
LPITEMIDLIST lpidl = PathToIDList(lpszPath);
if(lpidl == NULL) return FALSE; CTreeCtrl& tree = GetTreeCtrl();
// 从桌面结点开始搜索
HTREEITEM hDesktop = tree.GetRootItem();
if(hDesktop == NULL){
m_pMalloc->Free(lpidl);
return FALSE;
} HTREEITEM hCur = hDesktop;
WORD wPart = 0;
LPITEMIDLIST lpidlPart = lpidl;
// 对于每一个存在的结点,搜索其下的子结点
while(hCur != NULL && lpidlPart->mkid.cb != 0)
{
// 展开该结点
Expand(hCur,TVE_EXPAND);
wPart += lpidlPart->mkid.cb;
HTREEITEM hChild = tree.GetChildItem(hCur);
// 如果子结点存在,则:
while (hChild != NULL)
{
// 取得结点数据
LPFOLDERNODE lpfn = (LPFOLDERNODE)tree.GetItemData(hChild);
// 如果PIDL的长度匹配的话,则比较这两个PIDL
// PIDL的匹配长度按搜索深度层次而增加,即,第一次搜索匹配一个结构的长度,第二次
// 则匹配两个结构的长...
if(lpfn && PIDL_Len(lpfn->pidl) == wPart)
{
if(memcmp(lpidl, lpfn->pidl, wPart) == 0)
{
// 匹配成功
break;
}
}
hChild = tree.GetNextSiblingItem(hChild); // 下一个结点
}
hCur = hChild;
lpidlPart = PIDL_Next(lpidlPart); // PIDL的下一个结构
}
// 如果子结点存在,则匹配成功. 选中该结点
if(hCur != NULL)
{
tree.SelectItem(hCur);
tree.EnsureVisible(hCur);
} m_pMalloc->Free(lpidl); return hCur != NULL;
}// 释放结点数据
void CShellFolderView::FreeNodeData(LPFOLDERNODE lpfn)
{
if(lpfn)
{
m_pMalloc->Free(lpfn->pidl); // 释放PIDL
if(lpfn->pShellFolder) // 释放IShellFolder接口
lpfn->pShellFolder->Release();
if(lpfn->pMonitorThread != NULL) // 删除监视线程
delete lpfn->pMonitorThread;
delete lpfn; // 删除该结点
}
}void CShellFolderView::FreeNode(HTREEITEM hNode)
{
CTreeCtrl& tree = GetTreeCtrl();
if(hNode == NULL)
{
// 空的参数指明,将删除所有结点的数据
hNode = tree.GetRootItem();
}
else
{
// 删除本结点数据
LPFOLDERNODE lpfn = (LPFOLDERNODE)tree.GetItemData(hNode);
FreeNodeData(lpfn);
// 结点指向子结点
hNode = tree.GetChildItem(hNode);
}
// 删除所有子结点的数据
while(hNode != NULL)
{
FreeNode(hNode);
hNode = tree.GetNextSiblingItem(hNode);
}
}// 返回当前选中的路径(没有则返回空串)
CString CShellFolderView::GetSelectedDir()
{
HTREEITEM hSel = GetTreeCtrl().GetSelectedItem();
if(hSel == NULL) return "";
return ((LPFOLDERNODE)GetTreeCtrl().GetItemData(hSel))->cPath;
}
codeproject / shell 里面有个 explorer demo，也挺好的。不过是 WTL的