如何利用CEF3创建一个简单的应用程序(WindowsPlatform)

# Load the local file “c:\example\example.html”
cefsimple.exe --url=file://c:/example/example.html

# Load the local file “c:\example\example.html”
…
  if (url.empty())
    url = file://c:/example/example.html;    

#include 

#include "cefsimple/simple_app.h"
#include "include/cef_sandbox_win.h"


// Set to 0 to disable sandbox support.
#define CEF_ENABLE_SANDBOX 1

#if CEF_ENABLE_SANDBOX
// The cef_sandbox.lib static library is currently built with VS2010. It may not
// link successfully with other VS versions.
#pragma comment(lib, "cef_sandbox.lib")
#endif


// Entry point function for all processes.
int APIENTRY wWinMain(HINSTANCE hInstance,
                      HINSTANCE hPrevInstance,
                      LPTSTR    lpCmdLine,
                      int       nCmdShow) {
  UNREFERENCED_PARAMETER(hPrevInstance);
  UNREFERENCED_PARAMETER(lpCmdLine);

  void* sandbox_info = NULL;

#if CEF_ENABLE_SANDBOX
  // Manage the life span of the sandbox information object. This is necessary
  // for sandbox support on Windows. See cef_sandbox_win.h for complete details.
  CefScopedSandboxInfo scoped_sandbox;
  sandbox_info = scoped_sandbox.sandbox_info();
#endif

  // Provide CEF with command-line arguments.
  CefMainArgs main_args(hInstance);

  // SimpleApp implements application-level callbacks. It will create the first
  // browser instance in OnContextInitialized() after CEF has initialized.
  CefRefPtr app(new SimpleApp);

  // CEF applications have multiple sub-processes (render, plugin, GPU, etc)
  // that share the same executable. This function checks the command-line and,
  // if this is a sub-process, executes the appropriate logic.
  int exit_code = CefExecuteProcess(main_args, app.get(), sandbox_info);
  if (exit_code >= 0) {
    // The sub-process has completed so return here.
    return exit_code;
  }

  // Specify CEF global settings here.
  CefSettings settings;

#if !CEF_ENABLE_SANDBOX
  settings.no_sandbox = true;
#endif

  // Initialize CEF.
  CefInitialize(main_args, settings, app.get(), sandbox_info);

  // Run the CEF message loop. This will block until CefQuitMessageLoop() is
  // called.
  CefRunMessageLoop();

  // Shut down CEF.
  CefShutdown();

  return 0;
}

// simple_app.h
#include "include/cef_app.h"

class SimpleApp : public CefApp,
                  public CefBrowserProcessHandler {
 public:
  SimpleApp();

  // CefApp methods:
  virtual CefRefPtr GetBrowserProcessHandler()
      OVERRIDE { return this; }

  // CefBrowserProcessHandler methods:
  virtual void OnContextInitialized() OVERRIDE;

 private:
  // Include the default reference counting implementation.
  IMPLEMENT_REFCOUNTING(SimpleApp);
};


// simple_app.cpp
#include "cefsimple/simple_app.h"

#include <string>

#include "cefsimple/simple_handler.h"
#include "cefsimple/util.h"
#include "include/cef_browser.h"
#include "include/cef_command_line.h"

SimpleApp::SimpleApp() {
}

void SimpleApp::OnContextInitialized() {
  REQUIRE_UI_THREAD();

  // Information used when creating the native window.
  CefWindowInfo window_info;

#if defined(OS_WIN)
  // On Windows we need to specify certain flags that will be passed to
  // CreateWindowEx().
  window_info.SetAsPopup(NULL, "cefsimple");
#endif

  // SimpleHandler implements browser-level callbacks.
  CefRefPtr handler(new SimpleHandler());

  // Specify CEF browser settings here.
  CefBrowserSettings browser_settings;

  std::string url;

  // Check if a "--url=" value was provided via the command-line. If so, use
  // that instead of the default URL.
  CefRefPtr command_line =
      CefCommandLine::GetGlobalCommandLine();
  url = command_line->GetSwitchValue("url");
  if (url.empty())
    url = "http://www.google.com";

  // Create the first browser window.
  CefBrowserHost::CreateBrowserSync(window_info, handler.get(), url,
                                    browser_settings, NULL);
}

// simple_handler.h
#include "include/cef_client.h"

#include 

class SimpleHandler : public CefClient,
                      public CefDisplayHandler,
                      public CefLifeSpanHandler,
                      public CefLoadHandler {
 public:
  SimpleHandler();
  ~SimpleHandler();

  // Provide access to the single global instance of this object.
  static SimpleHandler* GetInstance();

  // CefClient methods:
  virtual CefRefPtr GetDisplayHandler() OVERRIDE {
    return this;
  }
  virtual CefRefPtr GetLifeSpanHandler() OVERRIDE {
    return this;
  }
  virtual CefRefPtr GetLoadHandler() OVERRIDE {
    return this;
  }

  // CefDisplayHandler methods:
  virtual void OnTitleChange(CefRefPtr browser,
                             const CefString& title) OVERRIDE;

  // CefLifeSpanHandler methods:
  virtual void OnAfterCreated(CefRefPtr browser) OVERRIDE;
  virtual void OnBeforeClose(CefRefPtr browser) OVERRIDE;

  // CefLoadHandler methods:
  virtual void OnLoadError(CefRefPtr browser,
                           CefRefPtr frame,
                           ErrorCode errorCode,
                           const CefString& errorText,
                           const CefString& failedUrl) OVERRIDE;

  // Request that all existing browser windows close.
  void CloseAllBrowsers(bool force_close);

 private:
  // List of existing browser windows. Only accessed on the CEF UI thread.
  typedef std::list > BrowserList;
  BrowserList browser_list_;

  // Include the default reference counting implementation.
  IMPLEMENT_REFCOUNTING(SimpleHandler);
};


// simple_handler.cpp
#include "cefsimple/simple_handler.h"

#include 
#include <string>

#include "cefsimple/util.h"
#include "include/cef_app.h"
#include "include/cef_runnable.h"

namespace {

SimpleHandler* g_instance = NULL;

}  // namespace

SimpleHandler::SimpleHandler() {
  ASSERT(!g_instance);
  g_instance = this;
}

SimpleHandler::~SimpleHandler() {
  g_instance = NULL;
}

// static
SimpleHandler* SimpleHandler::GetInstance() {
  return g_instance;
}

void SimpleHandler::OnAfterCreated(CefRefPtr browser) {
  REQUIRE_UI_THREAD();

  // Add to the list of existing browsers.
  browser_list_.push_back(browser);
}

void SimpleHandler::OnBeforeClose(CefRefPtr browser) {
  REQUIRE_UI_THREAD();

  // Remove from the list of existing browsers.
  BrowserList::iterator bit = browser_list_.begin();
  for (; bit != browser_list_.end(); ++bit) {
    if ((*bit)->IsSame(browser)) {
      browser_list_.erase(bit);
      break;
    }
  }

  if (browser_list_.empty()) {
    // All browser windows have closed. Quit the application message loop.
    CefQuitMessageLoop();
  }
}

void SimpleHandler::OnLoadError(CefRefPtr browser,
                                CefRefPtr frame,
                                ErrorCode errorCode,
                                const CefString& errorText,
                                const CefString& failedUrl) {
  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 <<""
        "
Failed to load URL " <string(failedUrl) <<
        " with error " <string(errorText) <<" (" <        ").";
  frame->LoadString(ss.str(), failedUrl);
}

void SimpleHandler::CloseAllBrowsers(bool force_close) {
  if (!CefCurrentlyOn(TID_UI)) {
    // Execute on the UI thread.
    CefPostTask(TID_UI,
        NewCefRunnableMethod(this, &SimpleHandler::CloseAllBrowsers,
                             force_close));
    return;
  }

  if (browser_list_.empty())
    return;

  BrowserList::const_iterator it = browser_list_.begin();
  for (; it != browser_list_.end(); ++it)
    (*it)->GetHost()->CloseBrowser(force_close);
}


// simple_handler_win.cpp -- Windows-specific code.
#include "cefsimple/simple_handler.h"

#include <string>
#include 

#include "cefsimple/util.h"
#include "include/cef_browser.h"

void SimpleHandler::OnTitleChange(CefRefPtr browser,
                                  const CefString& title) {
  REQUIRE_UI_THREAD();

  CefWindowHandle hwnd = browser->GetHost()->GetWindowHandle();
  SetWindowText(hwnd, std::wstring(title).c_str());
}


// simple_handler_gtk.cc  -- Linux-specific code.
#include "cefsimple/simple_handler.h"

#include 
#include <string>

#include "cefsimple/util.h"
#include "include/cef_browser.h"

void SimpleHandler::OnTitleChange(CefRefPtr browser,
                                  const CefString& title) {
  REQUIRE_UI_THREAD();

  GtkWidget* window = gtk_widget_get_ancestor(
      GTK_WIDGET(browser->GetHost()->GetWindowHandle()),
      GTK_TYPE_WINDOW);
  std::string titleStr(title);
  gtk_window_set_title(GTK_WINDOW(window), titleStr.c_str());
}


// simple_handler_mac.mm -- OS X-specific code.
#include "cefsimple/simple_handler.h"

#import 

#include "cefsimple/util.h"
#include "include/cef_browser.h"

void SimpleHandler::OnTitleChange(CefRefPtr browser,
                                  const CefString& title) {
  REQUIRE_UI_THREAD();

  NSView* view = (NSView*)browser->GetHost()->GetWindowHandle();
  NSWindow* window = [view window];
  std::string titleStr(title);
  NSString* str = [NSString stringWithUTF8String:titleStr.c_str()];
  [window setTitle:str];
}

Application/
  cefsimple.exe  <= cefsimple application executable
  libcef.dll <= main CEF library
  icudt.dll <= ICU unicode support library
  ffmpegsumo.dll <= HTML5 audio/video support library
  libEGL.dll, libGLESv2.dll, … <= accelerated compositing support libraries
  cef.pak, devtools_resources.pak <= non-localized resources and strings
  locales/
    en-US.pak, … <= locale-specific resources and strings