CEF3：用CEF3实现最简单的浏览器

本例开发环境：WIN10 + VS2015

如果还没有编译CEF3库，请见：Windows下用VS2015编译CEF3

创建一个空的 Windows 应用程序，命名为 SimpleBrowser，如下图：

新建 main.cpp ，编写如下代码：

#include "include/cef_app.h"
#include "include/cef_browser.h"
#include "include/cef_client.h"
#include "include/wrapper/cef_closure_task.h"
#include "include/wrapper/cef_helpers.h"
#include <Windows.h>

class MyClient : public CefClient, public CefLifeSpanHandler
{
    // Constructor & Destructor
public:
    virtual ~MyClient() {}

    // CefClient methods:
public:
    virtual CefRefPtr<CefLifeSpanHandler> GetLifeSpanHandler() override
    {
        return this;
    }

    // CefLifeSpanHandler methods:
public:
    virtual void OnBeforeClose(CefRefPtr<CefBrowser> browser) override
    {
        CefQuitMessageLoop();
    }

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

// Implement application-level callbacks for the browser process.
class MyApp : public CefApp, public CefBrowserProcessHandler
{
public:
    virtual ~MyApp() {}

    // CefApp methods:
    virtual CefRefPtr<CefBrowserProcessHandler> GetBrowserProcessHandler() override { return this; }

    // CefBrowserProcessHandler methods:
    virtual void OnContextInitialized() override
    {
        CEF_REQUIRE_UI_THREAD();

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

        // SimpleHandler implements browser-level callbacks.
        CefRefPtr<MyClient> client(new MyClient());

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

        // Specify CEF browser settings here.
        CefBrowserSettings browser_settings;

        // Create the first browser window.
        CefString url = "http://www.baidu.com";
        CefBrowserHost::CreateBrowser(window_info, client, url, browser_settings, NULL);
    }

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

int APIENTRY wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
    // Provide CEF with command-line arguments.
    CefMainArgs main_args(hInstance);

    // 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, NULL, NULL);
    if (exit_code >= 0)
    {
        // The sub-process has completed so return here.
        return exit_code;
    }

    // Specify CEF global settings here.
    CefSettings settings;
    settings.no_sandbox = true;

    // SimpleApp implements application-level callbacks for the browser process.
    // It will create the first browser instance in OnContextInitialized() after
    // CEF has initialized.
    auto myApp = CefRefPtr<MyApp>(new MyApp());

    // Initialize CEF.
    CefInitialize(main_args, settings, myApp.get(), NULL);

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

    // Shut down CEF.
    CefShutdown();

    return 0;
}

[工程属性] -> [C/C++] ，将 cef 库的 include 所在目录添加到 [附加包含目录]：

[工程属性] -> [链接器]，设置好 [附加库目录] 和 [附加依赖项]：

这里写图片描述

[工程属性] -> [后期生成事件]，在命令行里输入如下内容，将依赖的二进制和资源拷贝过来。另外注意需要将 manifest 清单文件嵌入到最后生成的 exe 中，否则可能无法正常运行。

mt.exe -nologo -manifest "G:\libs\cef\manifest\cef.exe.manifest" "G:\libs\cef\manifest\compatibility.manifest" -outputresource:"$(OutDir)$(TargetFileName)";#1
xcopy G:\libs\cef\lib\Debug\*.dll $(OutDir) /Y /E /F
xcopy G:\libs\cef\lib\Debug\*.bin $(OutDir) /Y /E /F
xcopy G:\libs\cef\Resources\* $(OutDir) /Y /E /F

编译，运行，效果如下：

以上就是用 CEF3 开发的最简单的浏览器。

CEF3：用CEF3实现最简单的浏览器

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