MFC（C++）使用SetPixel和LineTo函数绘制直线

 // MainFrm.cpp: CMainFrame 类的实现 // #include "pch.h" #include "framework.h" #include "Demo23.h" #include "MainFrm.h" #ifdef _DEBUG #define new DEBUG_NEW #endif // CMainFrame IMPLEMENT_DYNCREATE(CMainFrame, CFrameWndEx) const int iMaxUserToolbars = 10; const UINT uiFirstUserToolBarId = AFX_IDW_CONTROLBAR_FIRST + 40; const UINT uiLastUserToolBarId = uiFirstUserToolBarId + iMaxUserToolbars - 1; BEGIN_MESSAGE_MAP(CMainFrame, CFrameWndEx) ON_WM_CREATE() ON_COMMAND(ID_VIEW_CUSTOMIZE, &CMainFrame::OnViewCustomize) ON_REGISTERED_MESSAGE(AFX_WM_CREATETOOLBAR, &CMainFrame::OnToolbarCreateNew) ON_COMMAND_RANGE(ID_VIEW_APPLOOK_WIN_2000, ID_VIEW_APPLOOK_WINDOWS_7, &CMainFrame::OnApplicationLook) ON_UPDATE_COMMAND_UI_RANGE(ID_VIEW_APPLOOK_WIN_2000, ID_VIEW_APPLOOK_WINDOWS_7, &CMainFrame::OnUpdateApplicationLook) ON_WM_SETTINGCHANGE() END_MESSAGE_MAP() static UINT indicators[] = { ID_SEPARATOR, // 状态行指示器 ID_INDICATOR_CAPS, ID_INDICATOR_NUM, ID_INDICATOR_SCRL, }; // CMainFrame 构造/析构 CMainFrame::CMainFrame() noexcept { // TODO: 在此添加成员初始化代码 theApp.m_nAppLook = theApp.GetInt(_T("ApplicationLook"), ID_VIEW_APPLOOK_VS_2008); } CMainFrame::~CMainFrame() { } int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CFrameWndEx::OnCreate(lpCreateStruct) == -1) return -1; BOOL bNameValid; if (!m_wndMenuBar.Create(this)) { TRACE0("未能创建菜单栏\n"); return -1; // 未能创建 } m_wndMenuBar.SetPaneStyle(m_wndMenuBar.GetPaneStyle() | CBRS_SIZE_DYNAMIC | CBRS_TOOLTIPS | CBRS_FLYBY); // 防止菜单栏在激活时获得焦点 CMFCPopupMenu::SetForceMenuFocus(FALSE); if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP | CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) || !m_wndToolBar.LoadToolBar(theApp.m_bHiColorIcons ? IDR_MAINFRAME_256 : IDR_MAINFRAME)) { TRACE0("未能创建工具栏\n"); return -1; // 未能创建 } CString strToolBarName; bNameValid = strToolBarName.LoadString(IDS_TOOLBAR_STANDARD); ASSERT(bNameValid); m_wndToolBar.SetWindowText(strToolBarName); CString strCustomize; bNameValid = strCustomize.LoadString(IDS_TOOLBAR_CUSTOMIZE); ASSERT(bNameValid); m_wndToolBar.EnableCustomizeButton(TRUE, ID_VIEW_CUSTOMIZE, strCustomize); // 允许用户定义的工具栏操作: InitUserToolbars(nullptr, uiFirstUserToolBarId, uiLastUserToolBarId); if (!m_wndStatusBar.Create(this)) { TRACE0("未能创建状态栏\n"); return -1; // 未能创建 } m_wndStatusBar.SetIndicators(indicators, sizeof(indicators)/sizeof(UINT)); // TODO: 如果您不希望工具栏和菜单栏可停靠，请删除这五行 m_wndMenuBar.EnableDocking(CBRS_ALIGN_ANY); m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY); EnableDocking(CBRS_ALIGN_ANY); DockPane(&m_wndMenuBar); DockPane(&m_wndToolBar); // 启用 Visual Studio 2005 样式停靠窗口行为 CDockingManager::SetDockingMode(DT_SMART); // 启用 Visual Studio 2005 样式停靠窗口自动隐藏行为 EnableAutoHidePanes(CBRS_ALIGN_ANY); // 加载菜单项图像(不在任何标准工具栏上): CMFCToolBar::AddToolBarForImageCollection(IDR_MENU_IMAGES, theApp.m_bHiColorIcons ? IDB_MENU_IMAGES_24 : 0); // 创建停靠窗口 if (!CreateDockingWindows()) { TRACE0("未能创建停靠窗口\n"); return -1; } m_wndFileView.EnableDocking(CBRS_ALIGN_ANY); m_wndClassView.EnableDocking(CBRS_ALIGN_ANY); DockPane(&m_wndFileView); CDockablePane* pTabbedBar = nullptr; m_wndClassView.AttachToTabWnd(&m_wndFileView, DM_SHOW, TRUE, &pTabbedBar); m_wndOutput.EnableDocking(CBRS_ALIGN_ANY); DockPane(&m_wndOutput); m_wndProperties.EnableDocking(CBRS_ALIGN_ANY); DockPane(&m_wndProperties); // 基于持久值设置视觉管理器和样式 OnApplicationLook(theApp.m_nAppLook); // 启用工具栏和停靠窗口菜单替换 EnablePaneMenu(TRUE, ID_VIEW_CUSTOMIZE, strCustomize, ID_VIEW_TOOLBAR); // 启用快速(按住 Alt 拖动)工具栏自定义 CMFCToolBar::EnableQuickCustomization(); if (CMFCToolBar::GetUserImages() == nullptr) { // 加载用户定义的工具栏图像 if (m_UserImages.Load(_T(".\\UserImages.bmp"))) { CMFCToolBar::SetUserImages(&m_UserImages); } } // 启用菜单个性化(最近使用的命令) // TODO: 定义您自己的基本命令，确保每个下拉菜单至少有一个基本命令。 CList<UINT, UINT> lstBasicCommands; lstBasicCommands.AddTail(ID_FILE_NEW); lstBasicCommands.AddTail(ID_FILE_OPEN); lstBasicCommands.AddTail(ID_FILE_SAVE); lstBasicCommands.AddTail(ID_FILE_PRINT); lstBasicCommands.AddTail(ID_APP_EXIT); lstBasicCommands.AddTail(ID_EDIT_CUT); lstBasicCommands.AddTail(ID_EDIT_PASTE); lstBasicCommands.AddTail(ID_EDIT_UNDO); lstBasicCommands.AddTail(ID_APP_ABOUT); lstBasicCommands.AddTail(ID_VIEW_STATUS_BAR); lstBasicCommands.AddTail(ID_VIEW_TOOLBAR); lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2003); lstBasicCommands.AddTail(ID_VIEW_APPLOOK_VS_2005); lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2007_BLUE); lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2007_SILVER); lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2007_BLACK); lstBasicCommands.AddTail(ID_VIEW_APPLOOK_OFF_2007_AQUA); lstBasicCommands.AddTail(ID_VIEW_APPLOOK_WINDOWS_7); lstBasicCommands.AddTail(ID_SORTING_SORTALPHABETIC); lstBasicCommands.AddTail(ID_SORTING_SORTBYTYPE); lstBasicCommands.AddTail(ID_SORTING_SORTBYACCESS); lstBasicCommands.AddTail(ID_SORTING_GROUPBYTYPE); CMFCToolBar::SetBasicCommands(lstBasicCommands); return 0; } BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs) { if( !CFrameWndEx::PreCreateWindow(cs) ) return FALSE; // TODO: 在此处通过修改 // CREATESTRUCT cs 来修改窗口类或样式 return TRUE; } BOOL CMainFrame::CreateDockingWindows() { BOOL bNameValid; // 创建类视图 CString strClassView; bNameValid = strClassView.LoadString(IDS_CLASS_VIEW); ASSERT(bNameValid); if (!m_wndClassView.Create(strClassView, this, CRect(0, 0, 200, 200), TRUE, ID_VIEW_CLASSVIEW, WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | CBRS_LEFT | CBRS_FLOAT_MULTI)) { TRACE0("未能创建“类视图”窗口\n"); return FALSE; // 未能创建 } // 创建文件视图 CString strFileView; bNameValid = strFileView.LoadString(IDS_FILE_VIEW); ASSERT(bNameValid); if (!m_wndFileView.Create(strFileView, this, CRect(0, 0, 200, 200), TRUE, ID_VIEW_FILEVIEW, WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | CBRS_LEFT| CBRS_FLOAT_MULTI)) { TRACE0("未能创建“文件视图”窗口\n"); return FALSE; // 未能创建 } // 创建输出窗口 CString strOutputWnd; bNameValid = strOutputWnd.LoadString(IDS_OUTPUT_WND); ASSERT(bNameValid); if (!m_wndOutput.Create(strOutputWnd, this, CRect(0, 0, 100, 100), TRUE, ID_VIEW_OUTPUTWND, WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | CBRS_BOTTOM | CBRS_FLOAT_MULTI)) { TRACE0("未能创建输出窗口\n"); return FALSE; // 未能创建 } // 创建属性窗口 CString strPropertiesWnd; bNameValid = strPropertiesWnd.LoadString(IDS_PROPERTIES_WND); ASSERT(bNameValid); if (!m_wndProperties.Create(strPropertiesWnd, this, CRect(0, 0, 200, 200), TRUE, ID_VIEW_PROPERTIESWND, WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | CBRS_RIGHT | CBRS_FLOAT_MULTI)) { TRACE0("未能创建“属性”窗口\n"); return FALSE; // 未能创建 } SetDockingWindowIcons(theApp.m_bHiColorIcons); return TRUE; } void CMainFrame::SetDockingWindowIcons(BOOL bHiColorIcons) { HICON hFileViewIcon = (HICON) ::LoadImage(::AfxGetResourceHandle(), MAKEINTRESOURCE(bHiColorIcons ? IDI_FILE_VIEW_HC : IDI_FILE_VIEW), IMAGE_ICON, ::GetSystemMetrics(SM_CXSMICON), ::Get