MFC树形控件中使用背景位图

// TreeDlg.cpp : implementation file // #include "stdafx.h" #include "Tree.h" #include "TreeDlg.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CAboutDlg dialog used for App About class CAboutDlg : public CDialog { public: CAboutDlg(); // Dialog Data //{{AFX_DATA(CAboutDlg) enum { IDD = IDD_ABOUTBOX }; //}}AFX_DATA // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support //}}AFX_VIRTUAL // Implementation protected: //{{AFX_MSG(CAboutDlg) //}}AFX_MSG DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) { //{{AFX_DATA_INIT(CAboutDlg) //}}AFX_DATA_INIT } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CAboutDlg) //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //{{AFX_MSG_MAP(CAboutDlg) // No message handlers //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CTreeDlg dialog CTreeDlg::CTreeDlg(CWnd* pParent /*=NULL*/) : CDialog(CTreeDlg::IDD, pParent) { //{{AFX_DATA_INIT(CTreeDlg) // NOTE: the ClassWizard will add member initialization here //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CTreeDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CTreeDlg) DDX_Control(pDX, IDC_TREE1, m_CtrlTree); //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CTreeDlg, CDialog) //{{AFX_MSG_MAP(CTreeDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CTreeDlg message handlers BOOL CTreeDlg::OnInitDialog() { CDialog::OnInitDialog(); // Add "About..." menu item to system menu. // IDM_ABOUTBOX must be in the system command range. ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != NULL) { CString strAboutMenu; strAboutMenu.LoadString(IDS_ABOUTBOX); if (!strAboutMenu.IsEmpty()) { pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); } } // Set the icon for this dialog. The framework does this automatically // when the application's main window is not a dialog SetIcon(m_hIcon, TRUE); // Set big icon // TODO: Add extra initialization here m_CtrlTree.SetBKImage("cibas.bmp"); SetIcon(m_hIcon, FALSE); // Set small icon TVINSERTSTRUCT tvInsert; tvInsert.hParent = NULL; tvInsert.hInsertAfter = NULL; tvInsert.item.mask = TVIF_TEXT; tvInsert.item.pszText = _T("VC知识库www.vckbase.com"); HTREEITEM hCountry = m_CtrlTree.InsertItem(&tvInsert); HTREEITEM hPA = m_CtrlTree.InsertItem(TVIF_TEXT, _T("程序员社区"), 0, 0, 0, 0, 0, hCountry, NULL); HTREEITEM hWA = m_CtrlTree.InsertItem(_T("文档代码中心"), 0, 0, hCountry, hPA); m_CtrlTree.InsertItem(_T("程序员论坛"), hPA, TVI_SORT); m_CtrlTree.InsertItem(_T("程序员交友"), hPA, TVI_SORT); m_CtrlTree.InsertItem(_T("人才交流"), hPA, TVI_SORT); m_CtrlTree.InsertItem(_T("文档中心"), hWA, TVI_SORT); m_CtrlTree.InsertItem(_T("代码仓库"), hWA, TVI_SORT); m_CtrlTree.InsertItem(_T("个人专辑"), hWA, TVI_SORT); m_CtrlTree.Expand(hCountry,TVE_EXPAND); return TRUE; // return TRUE unless you set the focus to a control } void CTreeDlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialog::OnSysCommand(nID, lParam); } } // If you add a minimize button to your dialog, you will need the code below // to draw the icon. For MFC applications using the document/view model, // this is automatically done for you by the framework. void CTreeDlg::OnPaint() { if (IsIconic()) { CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); // Center icon in client rectangle 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; // Draw the icon dc.DrawIcon(x, y, m_hIcon); } else { CDialog::OnPaint(); } } // The system calls this to obtain the cursor to display while the user drags // the minimized window. HCURSOR CTreeDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; }