一、建立treeCtrlDlg mfc工程,参照下图添加控件。
二、修改tree Comtorl控件 always show selection、has button、has lines属性为true,添加TVN_SELCHANGED消息处理函数。
treeCtrlDlg.cpp
// treeCtrlDlg.cpp : 实现文件 // #include "stdafx.h" #include "treeCtrl.h" #include "treeCtrlDlg.h" #include "afxdialogex.h" #ifdef _DEBUG #define new DEBUG_NEW #endif // 用于应用程序“关于”菜单项的 CAboutDlg 对话框 class CAboutDlg : public CDialogEx { public: CAboutDlg(); // 对话框数据 enum { IDD = IDD_ABOUTBOX }; protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持 // 实现 protected: DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD) { } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialogEx::DoDataExchange(pDX); } BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx) END_MESSAGE_MAP() // CtreeCtrlDlg 对话框 CtreeCtrlDlg::CtreeCtrlDlg(CWnd* pParent /*=NULL*/) : CDialogEx(CtreeCtrlDlg::IDD, pParent) { m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CtreeCtrlDlg::DoDataExchange(CDataExchange* pDX) { CDialogEx::DoDataExchange(pDX); DDX_Control(pDX, IDC_TREE, m_tree); } BEGIN_MESSAGE_MAP(CtreeCtrlDlg, CDialogEx) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BTN_ADD, &CtreeCtrlDlg::OnBnClickedBtnAdd) ON_BN_CLICKED(IDC_BTN_EDIT, &CtreeCtrlDlg::OnBnClickedBtnEdit) ON_BN_CLICKED(IDC_BTN_DEL, &CtreeCtrlDlg::OnBnClickedBtnDel) ON_NOTIFY(TVN_SELCHANGED, IDC_TREE, &CtreeCtrlDlg::OnTvnSelchangedTree) END_MESSAGE_MAP() // CtreeCtrlDlg 消息处理程序 BOOL CtreeCtrlDlg::OnInitDialog() { CDialogEx::OnInitDialog(); // 将“关于...”菜单项添加到系统菜单中。 // IDM_ABOUTBOX 必须在系统命令范围内。 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != NULL) { BOOL bNameValid; CString strAboutMenu; bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX); ASSERT(bNameValid); if (!strAboutMenu.IsEmpty()) { pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); } } // 设置此对话框的图标。当应用程序主窗口不是对话框时,框架将自动 // 执行此操作 SetIcon(m_hIcon, TRUE); // 设置大图标 SetIcon(m_hIcon, FALSE); // 设置小图标 // TODO: 在此添加额外的初始化代码 return TRUE; // 除非将焦点设置到控件,否则返回 TRUE } void CtreeCtrlDlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialogEx::OnSysCommand(nID, lParam); } } // 如果向对话框添加最小化按钮,则需要下面的代码 // 来绘制该图标。对于使用文档/视图模型的 MFC 应用程序, // 这将由框架自动完成。 void CtreeCtrlDlg::OnPaint() { if (IsIconic()) { CPaintDC dc(this); // 用于绘制的设备上下文 SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0); // 使图标在工作区矩形中居中 int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.Width() - cxIcon + 1) / 2; int y = (rect.Height() - cyIcon + 1) / 2; // 绘制图标 dc.DrawIcon(x, y, m_hIcon); } else { CDialogEx::OnPaint(); } } //当用户拖动最小化窗口时系统调用此函数取得光标 //显示。 HCURSOR CtreeCtrlDlg::OnQueryDragIcon() { return static_cast<HCURSOR>(m_hIcon); } void CtreeCtrlDlg::OnBnClickedBtnAdd() { // TODO: 在此添加控件通知处理程序代码 CString strText; GetDlgItemText(IDC_EDIT,strText); if(strText.GetLength() == 0) { AfxMessageBox(_T("请输入文本!")); return; } //获取当前选中tree句柄 HTREEITEM hItem = m_tree.GetSelectedItem(); if(hItem == NULL) { hItem = TVI_ROOT; } TVINSERTSTRUCT ts = {0}; ts.hParent = hItem; //插入到最后 ts.hInsertAfter = TVI_LAST; //插入到文本 框 ts.item.pszText = strText.GetBuffer(); //设置文本掩码,使文本成员有效 ts.item.mask = TVIF_TEXT; //插入新节点 HTREEITEM hNewItem = m_tree.InsertItem(&ts); //新添加为当前选中 m_tree.SelectItem(hNewItem); //防止树过大显示不全 m_tree.EnsureVisible(hNewItem); } void CtreeCtrlDlg::OnBnClickedBtnEdit() { // TODO: 在此添加控件通知处理程序代码 HTREEITEM hItem = m_tree.GetSelectedItem(); if(hItem == NULL) { AfxMessageBox(_T("请选择一个节点!")); return; } CString strText; GetDlgItemText(IDC_EDIT,strText); if(strText.GetLength() == 0) { AfxMessageBox(_T("请输入文本!")); return; } m_tree.SetItemText(hItem,strText); } void CtreeCtrlDlg::OnBnClickedBtnDel() { // TODO: 在此添加控件通知处理程序代码 HTREEITEM hItem = m_tree.GetSelectedItem(); if(hItem == NULL) { AfxMessageBox(_T("请选择一个节点!")); return; } HTREEITEM hParent = m_tree.GetParentItem(hItem); m_tree.DeleteItem(hItem); m_tree.SelectItem(hItem); } void CtreeCtrlDlg::OnTvnSelchangedTree(NMHDR *pNMHDR, LRESULT *pResult) { LPNMTREEVIEW pNMTreeView = reinterpret_cast<LPNMTREEVIEW>(pNMHDR); // TODO: 在此添加控件通知处理程序代码 HTREEITEM hItem = m_tree.GetSelectedItem(); if(hItem != NULL) { CString strText = m_tree.GetItemText(hItem); SetDlgItemText(IDC_EDIT,strText); return; } *pResult = 0; }
源码下载:
链接:https://pan.baidu.com/s/1mg1r_3T7QU4r_6Pf0vCvkw
提取码:e2zv