官方MFC+CEF例子:https://bitbucket.org/TSS_DEV/cef-mfc/src/default/
學習參考:https://www.codeproject.com/Articles/1105945/Embedding-a-Chromium-Browser-in-an-MFC-Application
CEF3的二進制發行版可從https://cefbuilds.com/獲得,其中包括以下內容:
- CEF共享庫(libcef)及其依賴項的調試和發布版本
- 使用CEF的C ++應用程序所必需的C ++包裝靜態庫(libcef_dll_wrapper)
- 兩個示例應用程序(cefsimple和cefclient)
- 使用CEF的應用程序資源
- CEF的調試和發布符號(作為單獨下載)
出於本文的目的,我們將使用CEF的二進制分發。
因此,本文的前提條件是:
- 來自開發分支機構(樹干)的最新CEF 64位版本(cef_binary_79.0.10+ge866a07+chromium-79.0.3945.88_windows64)
- Visual Studio 2017(因為CEF已與此版本一起編譯)
一個MFC SDI應用程序主要包含CWinApp、CFrameWnd、CDocument以及CView等組件。
另一方面,基於CEF的應用程序具有以下組件:
- 初始化CEF並運行CEF消息循環的入口點。
- 一個CefApp派生類,用於處理特定於進程的回調。
- CefClient派生的類,用於處理特定於瀏覽器實例的回調(可以包括瀏覽器生命周期,上下文菜單,對話框,顯示通知,拖動事件,焦點事件,鍵盤事件等的回調)。 CefClient的單個實例可以在任意數量的瀏覽器之間共享。
- 使用CefBrowserHost::CreateBrowser()創建的一個或多個CefBrowser實例。
要將Chromium瀏覽器嵌入到MFC應用程序中,我們需要:
- 啟動應用程序時初始化CEF;這應該在CWinApp::InitInstance()重寫方法中完成
- 應用程序存在時取消初始化CEF; 這應該在CWinApp::ExitInstance()重寫方法中完成
- 實現CefClient來處理特定於瀏覽器實例的回調;CefClient的實例存儲在CView派生類中。 創建視圖時,我們還必須創建一個CefBrowser作為視圖的子視圖,並將其顯示在視圖頂部,並始終保持其大小與視圖相同。
PS: libcef_dll_wrapper.lib使用MDd(Debug)和MD(Release)方式構建
創建cefmfcdemo工程,注意以下設置:
- 從32位創建一個64位項目目標復制設置。
- 確保$(SolutionDir)$(Configuration)\是所有平台和配置的輸出(這意味着CEF主文件夾中的Debug和Release文件夾)。
- 更改VC ++目錄,並將.\添加到包含目錄,並將$(SolutionDir)\lib\$(Configuration)\添加到Library目錄。
- 將libcef.lib和libcef_dll_wrapper.lib添加到鏈接器的其他依賴項。
- 在運行應用程序之前,將Resources文件夾的內容復制到Debug and Release,因為它包含CEF框架所需的資源。
ClientHandler.h
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// Copyright (c) 2013 The Chromium Embedded Framework Authors. All rights // reserved. Use of this source code is governed by a BSD-style license that // can be found in the LICENSE file. #ifndef CEF_TESTS_CEFSIMPLE_SIMPLE_HANDLER_H_ #define CEF_TESTS_CEFSIMPLE_SIMPLE_HANDLER_H_ #include "include/base/cef_lock.h" #include "include/cef_client.h" class ClientHandler : public CefClient, public CefDisplayHandler, public CefLifeSpanHandler, public CefLoadHandler { public : // Implement this interface to receive notification of ClientHandler // events. The methods of this class will be called on the main thread. class Delegate { public : // Called when the browser is created. virtual void OnBrowserCreated(CefRefPtr<CefBrowser> browser) = 0 ; // Called when the browser is closing. virtual void OnBrowserClosing(CefRefPtr<CefBrowser> browser) = 0 ; // Called when the browser has been closed. virtual void OnBrowserClosed(CefRefPtr<CefBrowser> browser) = 0 ; // Set the window URL address. virtual void OnSetAddress(std::string const &url) = 0 ; // Set the window title. virtual void OnSetTitle(std::string const &title) = 0 ; // Set fullscreen mode. virtual void OnSetFullscreen( bool const fullscreen) = 0 ; // Set the loading state. virtual void OnSetLoadingState( bool const isLoading, bool const canGoBack, bool const canGoForward) = 0 ; protected : virtual ~Delegate() {} }; public : ClientHandler(Delegate *delegate); ~ClientHandler(); void CreateBrowser(CefWindowInfo const &info, CefBrowserSettings const &settings, CefString const &url); // CefClient methods: virtual CefRefPtr<CefDisplayHandler> GetDisplayHandler() override { return this ; } virtual CefRefPtr<CefLifeSpanHandler> GetLifeSpanHandler() override { return this ; } virtual CefRefPtr<CefLoadHandler> GetLoadHandler() override { return this ; } // CefDisplayHandler methods: virtual void OnAddressChange(CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, const CefString &url) override; virtual void OnTitleChange(CefRefPtr<CefBrowser> browser, const CefString &title) override; virtual void OnFullscreenModeChange(CefRefPtr<CefBrowser> browser, bool fullscreen) override; // CefLifeSpanHandler methods: virtual void OnAfterCreated(CefRefPtr<CefBrowser> browser) override; virtual bool DoClose(CefRefPtr<CefBrowser> browser) override; virtual void OnBeforeClose(CefRefPtr<CefBrowser> browser) override; // CefLoadHandler methods: virtual void OnLoadingStateChange(CefRefPtr<CefBrowser> browser, bool isLoading, bool canGoBack, bool canGoForward) override; virtual void OnLoadError(CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, ErrorCode errorCode, const CefString &errorText, const CefString &failedUrl) override; // This object may outlive the Delegate object so it's necessary for the // Delegate to detach itself before destruction. void DetachDelegate(); private : // Include the default reference counting implementation. IMPLEMENT_REFCOUNTING(ClientHandler); // Include the default locking implementation. IMPLEMENT_LOCKING(ClientHandler); private : Delegate *m_delegate; }; #endif // CEF_TESTS_CEFSIMPLE_SIMPLE_HANDLER_H_ |
ClientHandler.cpp
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// Copyright (c) 2013 The Chromium Embedded Framework Authors. All rights // reserved. Use of this source code is governed by a BSD-style license that // can be found in the LICENSE file. #include "stdafx.h" #include "ClientHandler.h" #include <sstream> #include <string> #include "include/base/cef_bind.h" #include "include/cef_app.h" #include "include/wrapper/cef_closure_task.h" #include "include/wrapper/cef_helpers.h" ClientHandler::ClientHandler(Delegate *delegate) : m_delegate(delegate) { } ClientHandler::~ClientHandler() { } void ClientHandler::CreateBrowser(CefWindowInfo const &info, CefBrowserSettings const &settings, CefString const &url) { CefBrowserHost::CreateBrowser(info, this , url, settings, nullptr, nullptr); } void ClientHandler::OnAddressChange(CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, const CefString &url) { CEF_REQUIRE_UI_THREAD(); // Only update the address for the main (top-level) frame. if (frame->IsMain()) { if (m_delegate != nullptr) m_delegate->OnSetAddress(url); } } void ClientHandler::OnTitleChange(CefRefPtr<CefBrowser> browser, const CefString &title) { CEF_REQUIRE_UI_THREAD(); if (m_delegate != nullptr) m_delegate->OnSetTitle(title); } void ClientHandler::OnFullscreenModeChange(CefRefPtr<CefBrowser> browser, bool fullscreen) { CEF_REQUIRE_UI_THREAD(); if (m_delegate != nullptr) m_delegate->OnSetFullscreen(fullscreen); } void ClientHandler::OnAfterCreated(CefRefPtr<CefBrowser> browser) { CEF_REQUIRE_UI_THREAD(); if (m_delegate != nullptr) m_delegate->OnBrowserCreated(browser); } bool ClientHandler::DoClose(CefRefPtr<CefBrowser> browser) { CEF_REQUIRE_UI_THREAD(); if (m_delegate != nullptr) m_delegate->OnBrowserClosing(browser); return false ; } void ClientHandler::OnBeforeClose(CefRefPtr<CefBrowser> browser) { CEF_REQUIRE_UI_THREAD(); if (m_delegate != nullptr) m_delegate->OnBrowserClosed(browser); } void ClientHandler::OnLoadError(CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, ErrorCode errorCode, const CefString &errorText, const CefString &failedUrl) { CEF_REQUIRE_UI_THREAD(); // Don't display an error for downloaded files. if (errorCode == ERR_ABORTED) return ; // Display a load error message. std::stringstream ss; ss << "<html><body bgcolor=\" white\ ">" "<h2>Failed to load URL " << std::string(failedUrl) << " with error " << std::string(errorText) << " (" << errorCode << ").</h2></body></html>" ; //frame->LoadString(ss.str(), failedUrl); frame->LoadURL(CefString(ss.str())); } void ClientHandler::OnLoadingStateChange(CefRefPtr<CefBrowser> browser, bool isLoading, bool canGoBack, bool canGoForward) { CEF_REQUIRE_UI_THREAD(); if (m_delegate != nullptr) m_delegate->OnSetLoadingState(isLoading, canGoBack, canGoForward); } void ClientHandler::DetachDelegate() { m_delegate = nullptr; } |
CefView.h
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// CefView.h : interface of the CefView class // #pragma once #include "ClientHandler.h" class CefView : public CView, public ClientHandler::Delegate { protected : // create from serialization only CefView(); DECLARE_DYNCREATE(CefView) // Attributes public : CefDoc *GetDocument() const ; // Operations public : void Navigate(CString const &url); void NavigateBack(); void NavigateForward(); bool CanNavigateBack(); bool CanNavigateForward(); void CloseBrowser(); // Overrides public : virtual void OnDraw(CDC *pDC); // overridden to draw this view virtual BOOL PreCreateWindow(CREATESTRUCT &cs); virtual void OnActivateView(BOOL bActivate, CView *pActivateView, CView *pDeactiveView); virtual BOOL PreTranslateMessage(MSG *pMsg); protected : // Implementation public : virtual ~CefView(); #ifdef _DEBUG virtual void AssertValid() const ; virtual void Dump(CDumpContext &dc) const ; #endif protected : virtual void OnBrowserCreated(CefRefPtr<CefBrowser> browser) override; // Called when the browser is closing. virtual void OnBrowserClosing(CefRefPtr<CefBrowser> browser) override; // Called when the browser has been closed. virtual void OnBrowserClosed(CefRefPtr<CefBrowser> browser) override; // Set the window URL address. virtual void OnSetAddress(std::string const &url) override; // Set the window title. virtual void OnSetTitle(std::string const &title) override; // Set fullscreen mode. virtual void OnSetFullscreen( bool const fullscreen) override; // Set the loading state. virtual void OnSetLoadingState( bool const isLoading, bool const canGoBack, bool const canGoForward) override; // Generated message map functions protected : DECLARE_MESSAGE_MAP() virtual void OnInitialUpdate(); void OnSize(UINT nType, int cx, int cy); private : void InitStartUrl(); CefRefPtr<ClientHandler> m_clientHandler; CefRefPtr<CefBrowser> m_browser; CWnd *m_wndMain = nullptr; CString m_startUrl; }; #ifndef _DEBUG // debug version in CefView.cpp inline CefDoc *CefView::GetDocument() const { return reinterpret_cast <CefDoc *>(m_pDocument); } #endif |
CefView.cpp
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// CefView.cpp : implementation of the CefView class // #include "stdafx.h" // SHARED_HANDLERS can be defined in an ATL project implementing preview, thumbnail // and search filter handlers and allows sharing of document code with that project. #ifndef SHARED_HANDLERS #include "cefmfcdemo.h" #endif #include "CefDoc.h" #include "CefView.h" #include "CefWindowsHelpers.h" #include "include\internal\cef_string_wrappers.h" #include "MainFrm.h" #ifdef _DEBUG #define new DEBUG_NEW #endif // CefView IMPLEMENT_DYNCREATE(CefView, CView) BEGIN_MESSAGE_MAP(CefView, CView) ON_WM_SIZE() END_MESSAGE_MAP() // CefView construction/destruction CefView::CefView() { // TODO: add construction code here } CefView::~CefView() { if (m_clientHandler != nullptr) m_clientHandler->DetachDelegate(); } BOOL CefView::PreCreateWindow(CREATESTRUCT &cs) { // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs return CView::PreCreateWindow(cs); } void CefView::OnActivateView(BOOL bActivate, CView *pActivateView, CView *pDeactiveView) { m_wndMain = AfxGetMainWnd(); return CView::OnActivateView(bActivate, pActivateView, pDeactiveView); } // CefView drawing void CefView::OnDraw(CDC * /*pDC*/ ) { CefDoc *pDoc = GetDocument(); ASSERT_VALID(pDoc); if (!pDoc) return ; // TODO: add draw code for native data here } // CefView diagnostics #ifdef _DEBUG void CefView::AssertValid() const { CView::AssertValid(); } void CefView::Dump(CDumpContext &dc) const { CView::Dump(dc); } CefDoc *CefView::GetDocument() const // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CefDoc))); return (CefDoc *)m_pDocument; } #endif //_DEBUG void CefView::OnBrowserCreated(CefRefPtr<CefBrowser> browser) { m_browser = browser; } void CefView::OnBrowserClosing(CefRefPtr<CefBrowser> browser) { } void CefView::OnBrowserClosed(CefRefPtr<CefBrowser> browser) { if (m_browser != nullptr && m_browser->GetIdentifier() == browser->GetIdentifier()) { m_browser = nullptr; m_clientHandler->DetachDelegate(); } } void CefView::OnSetAddress(std::string const &url) { auto main = static_cast <CMainFrame *>(m_wndMain); if (main != nullptr) { auto newurl = CString {url.c_str()}; if (newurl.Find(m_startUrl) >= 0 ) newurl = "" ; main->SetUrl(newurl); } } void CefView::OnSetTitle(std::string const &title) { ::SetWindowText(m_hWnd, CefString(title).ToWString().c_str()); } void CefView::OnSetFullscreen( bool const fullscreen) { if (m_browser != nullptr) { if (fullscreen) { CefWindowsHelpers::Maximize(m_browser); } else { CefWindowsHelpers::Restore(m_browser); } } } void CefView::OnSetLoadingState( bool const isLoading, bool const canGoBack, bool const canGoForward) { } void CefView::OnInitialUpdate() { CView::OnInitialUpdate(); InitStartUrl(); auto rect = RECT{ 0 }; GetClientRect(&rect); CefWindowInfo info; info.SetAsChild(GetSafeHwnd(), rect); CefBrowserSettings browserSettings; browserSettings.web_security = STATE_DISABLED; m_clientHandler = new ClientHandler( this ); m_clientHandler->CreateBrowser(info, browserSettings, CefString(m_startUrl)); } void CefView::OnSize(UINT nType, int cx, int cy) { CView::OnSize(nType, cx, cy); if (m_clientHandler != nullptr) { if (m_browser != nullptr) { auto hwnd = m_browser->GetHost()->GetWindowHandle(); auto rect = RECT { 0 }; GetClientRect(&rect); ::SetWindowPos(hwnd, HWND_TOP, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER); } } } BOOL CefView::PreTranslateMessage(MSG *pMsg) { if (pMsg->message == WM_KEYDOWN) { if (pMsg->wParam == VK_F5) { m_browser->Reload(); } } return CView::PreTranslateMessage(pMsg); } void CefView::Navigate(CString const &url) { if (m_browser != nullptr) { auto frame = m_browser->GetMainFrame(); if (frame != nullptr) { frame->LoadURL(CefString(url)); } } } void CefView::NavigateBack() { if (m_browser != nullptr) { m_browser->GoBack(); } } void CefView::NavigateForward() { if (m_browser != nullptr) { m_browser->GoForward(); } } bool CefView::CanNavigateBack() { return m_browser != nullptr && m_browser->CanGoBack(); } bool CefView::CanNavigateForward() { return m_browser != nullptr && m_browser->CanGoForward(); } void CefView::InitStartUrl() { TCHAR path_buffer[_MAX_PATH] = { 0 }; TCHAR drive[_MAX_DRIVE] = { 0 }; TCHAR dir[_MAX_DIR] = { 0 }; TCHAR fname[_MAX_FNAME] = { 0 }; TCHAR ext[_MAX_EXT] = { 0 }; ::GetModuleFileName( NULL , path_buffer, sizeof (path_buffer)); auto err = _tsplitpath_s(path_buffer, drive, _MAX_DRIVE, dir, _MAX_DIR, fname, _MAX_FNAME, ext, _MAX_EXT); if (err != 0 ) {} auto s = CString{dir}; s += _T( "html" ); err = _tmakepath_s(path_buffer, _MAX_PATH, drive, (LPCTSTR)s, _T( "index" ), _T( "html" )); if (err != 0 ) {} m_startUrl = CString {path_buffer}; m_startUrl.Replace(_T( '\\' ), _T( '/' )); m_startUrl = CString {_T( "file:///" )} + m_startUrl; } void CefView::CloseBrowser() { if (m_browser != nullptr) { ::DestroyWindow(m_browser->GetHost()->GetWindowHandle()); //m_browser->GetHost()->CloseBrowser(true); } } |
CefMfcdDemoApp.h
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// cefmfcdemo.h : main header file for the cefmfcdemo application // #pragma once #ifndef __AFXWIN_H__ #error "include 'stdafx.h' before including this file for PCH" #endif #include "resource.h" // main symbols #include "include/cef_base.h" #include "include/cef_app.h" // CefMfcdDemoApp: // See cefmfcdemo.cpp for the implementation of this class // class CefMfcdDemoApp : public CWinApp { public : CefMfcdDemoApp(); // Overrides public : virtual BOOL InitInstance(); virtual int ExitInstance(); virtual BOOL PumpMessage() override; // Implementation afx_msg void OnAppAbout(); DECLARE_MESSAGE_MAP() private : void InitializeCef(); void UninitializeCef(); bool m_bCEFInitialized; CefRefPtr<CefApp> m_app; }; extern CefMfcdDemoApp theApp; |
C++ Code
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// cefmfcdemo.cpp : Defines the class behaviors for the application. // #include "stdafx.h" #include "afxwinappex.h" #include "afxdialogex.h" #include "cefmfcdemo.h" #include "MainFrm.h" #include "CefDoc.h" #include "CefView.h" #ifdef _DEBUG #define new DEBUG_NEW #endif // CefMfcdDemoApp BEGIN_MESSAGE_MAP(CefMfcdDemoApp, CWinApp) ON_COMMAND(ID_APP_ABOUT, &CefMfcdDemoApp::OnAppAbout) // Standard file based document commands ON_COMMAND(ID_FILE_NEW, &CWinApp::OnFileNew) ON_COMMAND(ID_FILE_OPEN, &CWinApp::OnFileOpen) END_MESSAGE_MAP() // CefMfcdDemoApp construction CefMfcdDemoApp::CefMfcdDemoApp() { // support Restart Manager m_dwRestartManagerSupportFlags = AFX_RESTART_MANAGER_SUPPORT_ALL_ASPECTS; #ifdef _MANAGED // If the application is built using Common Language Runtime support (/clr): // 1) This additional setting is needed for Restart Manager support to work properly. // 2) In your project, you must add a reference to System.Windows.Forms in order to build. System::Windows::Forms::Application::SetUnhandledExceptionMode(System::Windows::Forms::UnhandledExceptionMode::ThrowException); #endif // TODO: replace application ID string below with unique ID string; recommended // format for string is CompanyName.ProductName.SubProduct.VersionInformation SetAppID(_T( "cefmfcdemo.AppID.NoVersion" )); // TODO: add construction code here, // Place all significant initialization in InitInstance m_bCEFInitialized = false ; } // The one and only CefMfcdDemoApp object CefMfcdDemoApp theApp; // CefMfcdDemoApp initialization BOOL CefMfcdDemoApp::InitInstance() { // InitCommonControlsEx() is required on Windows XP if an application // manifest specifies use of ComCtl32.dll version 6 or later to enable // visual styles. Otherwise, any window creation will fail. INITCOMMONCONTROLSEX InitCtrls; InitCtrls.dwSize = sizeof (InitCtrls); // Set this to include all the common control classes you want to use // in your application. InitCtrls.dwICC = ICC_WIN95_CLASSES; InitCommonControlsEx(&InitCtrls); InitializeCef(); CWinApp::InitInstance(); // Initialize OLE libraries if (!AfxOleInit()) { AfxMessageBox(IDP_OLE_INIT_FAILED); return FALSE; } AfxEnableControlContainer(); EnableTaskbarInteraction(FALSE); // AfxInitRichEdit2() is required to use RichEdit control // AfxInitRichEdit2(); // Standard initialization // If you are not using these features and wish to reduce the size // of your final executable, you should remove from the following // the specific initialization routines you do not need // Change the registry key under which our settings are stored // TODO: You should modify this string to be something appropriate // such as the name of your company or organization SetRegistryKey(_T( "Local AppWizard-Generated Applications" )); LoadStdProfileSettings( 0 ); // Load standard INI file options (including MRU) // Register the application's document templates. Document templates // serve as the connection between documents, frame windows and views CSingleDocTemplate *pDocTemplate; pDocTemplate = new CSingleDocTemplate( IDR_MAINFRAME, RUNTIME_CLASS(CefDoc), RUNTIME_CLASS(CMainFrame), // main SDI frame window RUNTIME_CLASS(CefView)); if (!pDocTemplate) return FALSE; AddDocTemplate(pDocTemplate); // Parse command line for standard shell commands, DDE, file open CCommandLineInfo cmdInfo; ParseCommandLine(cmdInfo); // Dispatch commands specified on the command line. Will return FALSE if // app was launched with /RegServer, /Register, /Unregserver or /Unregister. if (!ProcessShellCommand(cmdInfo)) return FALSE; // The one and only window has been initialized, so show and update it m_pMainWnd->ShowWindow(SW_SHOW); m_pMainWnd->UpdateWindow(); return TRUE; } int CefMfcdDemoApp::ExitInstance() { //TODO: handle additional resources you may have added AfxOleTerm(FALSE); UninitializeCef(); return CWinApp::ExitInstance(); } BOOL CefMfcdDemoApp::PumpMessage() { if (m_bCEFInitialized) CefDoMessageLoopWork(); return CWinApp::PumpMessage(); } // CefMfcdDemoApp message handlers // CAboutDlg dialog used for App About class CAboutDlg : public CDialogEx { public : CAboutDlg(); // Dialog Data enum { IDD = IDD_ABOUTBOX }; protected : virtual void DoDataExchange(CDataExchange *pDX); // DDX/DDV support // Implementation 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() // App command to run the dialog void CefMfcdDemoApp::OnAppAbout() { CAboutDlg aboutDlg; aboutDlg.DoModal(); } // CefMfcdDemoApp message handlers void CefMfcdDemoApp::InitializeCef() { CefMainArgs mainargs(m_hInstance); CefSettings settings; settings.multi_threaded_message_loop = false ; m_bCEFInitialized = CefInitialize(mainargs, settings, m_app, nullptr); } void CefMfcdDemoApp::UninitializeCef() { CefShutdown(); } |
運行截圖:
參考完整代碼下載:
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