VC控件 TreeCtrl 与 ListCtrl 演示

主要用到的类有

CListCtrlCTreeCtrlCImageListCFileFind 和函数SHGetFileInfo()

简述步骤如下

增加 TreeCtrl 的 TVS_HASBUTTONSTVS_HASLINESTVS_LINESATROOT Style代码如下

DWORD dwStyle = GetWindowLong(m_treem_hWndGWL_STYLE);

dwStyle |= TVS_HASBUTTONS | TVS_HASLINES | TVS_LINESATROOT;

SetWindowLong(m_treem_hWndGWL_STYLEdwStyle);

为TreeCtrl添加Root项

m_hRoot = m_treeInsertItem(我的电脑);

InsertItem()的函数原形为

HTREEITEM InsertItem( LPCTSTR lpszItem HTREEITEM hParent = TVI_ROOT

HTREEITEM hInsertAfter = TVI_LAST );

获取本地逻辑驱动器并添加void CTreeViewDlg::GetLogicalDrives(HTREEITEM hParent)

{

size_t szAllDriveStrings = GetLogicalDriveStrings(NULL);

char *pDriveStrings = new char[szAllDriveStrings + sizeof(_T())];

GetLogicalDriveStrings(szAllDriveStringspDriveStrings);

size_t szDriveString = strlen(pDriveStrings);

while(szDriveString > )

{

m_treeInsertItem(pDriveStringshParent);

pDriveStrings += szDriveString + ;

szDriveString = strlen(pDriveStrings);

}

}

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(itemhItem == m_hRoot)

return;

HTREEITEM hChild = m_treeGetChildItem(itemhItem);

while(hChild)

{

AddSubDir(hChild);

hChild = m_treeGetNextItem(hChildTVGN_NEXT);

}

*pResult = ;

}

AddSubDir函数功能添加子项具体代码见示例

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_listDeleteAllItems();

NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;

TVITEM item = pNMTreeView>itemNew;

if(itemhItem == m_hRoot)

return;

CString str = GetFullPath(itemhItem);

if(strRight() != \\)

str += \\;

str += **;

CFileFind file;

BOOL bContinue = fileFindFile(str);

while(bContinue)

{

bContinue = fileFindNextFile();

if(!fileIsDirectory() && !fileIsDots())

{

SHFILEINFO info;

CString temp = str;

int index = tempFind(**);

tempDelete(index);

SHGetFileInfo(temp + fileGetFileName()

&infosizeof(&info)

SHGFI_DISPLAYNAME | SHGFI_ICON);

int i = m_ImageListAdd(infohIcon);

m_listInsertItem(iinfoszDisplayNamei);

}

}

*pResult = ;

}

这只是一个简单的例子你可以在 ListCtrl 中添加鼠标双击消息的处理函数用 Process 打开该选中的文件; 该示例在VCxp下编译通过

VC初学者如有不足之处请来信指教(way)

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