Qt 显示透明flash和编写QtWebkit插件

Qt 有两种方法可以显示flash.

1. 通过QAxWidget 调用com形式显示flash, 需要本机安装IE flash插件

2. 直接通过qwebview显示flash, 需要下载webkit 的flash插件 NPSWF32.dll

 

1. 通过IE显示flash 是通常做法. QAxWidget提供很方便的嵌入, 只是IE对页面的支持可能不是很好

但是QAxWidget有个最大的问题, 不支持透明的flash

如果直接设置frameless 和tranparent background的话, qaxwidget会整个窗口直接透明的. 

//flash->setWindowFlags(Qt::FramelessWindowHint); 

//flash->setAttribute(Qt::WA_TranslucentBackground);

 

摸索了很久, 最开始的解决方案为使用IWebBrowser2模拟出一个浏览器, 代码复杂的很, 继承一堆com 的东西. 估计有点像简洁版的mfc html控件

概要如下:

class CBrowserEventBridge :public IDispatch
{
public:CBrowserEventBridge();virtual ~CBrowserEventBridge();public:STDMETHOD_(ULONG, AddRef)();STDMETHOD_(ULONG, Release)();STDMETHODIMP QueryInterface(REFIID riid, void** ppv);STDMETHODIMP GetTypeInfoCount(UINT* pCountTypeInfo);STDMETHODIMP GetTypeInfo(UINT iTypeInfo, LCID lcid, ITypeInfo** ppITypeInfo);STDMETHODIMP GetIDsOfNames(REFIID riid, LPOLESTR* rgszNames, UINT cNames, LCID lcid, DISPID* rgDispId);STDMETHODIMP Advise(IUnknown* pUnkCP, const IID& iid);STDMETHODIMP Unadvise(IUnknown* pUnkCP, const IID& iid);STDMETHODIMP Advise(CFlashPlayer *pPlayer, IWebBrowser2* pIE);STDMETHODIMP Unadvise();STDMETHODIMP Invoke(DISPID dispidMember,REFIID riid, LCID lcid, WORD wFlags,DISPPARAMS* dispParams,VARIANT* pvarResult,EXCEPINFO* pExcepInfo,UINT* puArgErr);
private:IWebBrowser2*    m_webBrowser;DWORD            m_dwCookie;CFlashPlayer    *m_pPlayer;
};class CFlashPlayer : public IOleClientSite, public IOleInPlaceSite, public IDocHostUIHandler, public IOleInPlaceFrame
{
public:class IFlashPlayerDelegate{public://播放完毕回调virtual HRESULT OnFlashPlayEnd() = 0;};CFlashPlayer(IFlashPlayerDelegate *pDelegate);~CFlashPlayer();//imp IUnknownULONG STDMETHODCALLTYPE AddRef( void);ULONG STDMETHODCALLTYPE Release( void);HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid,__RPC__deref_out void __RPC_FAR *__RPC_FAR *ppvObject);//imp IOleClientSiteHRESULT STDMETHODCALLTYPE SaveObject( void);HRESULT STDMETHODCALLTYPE GetMoniker(  DWORD dwAssign,DWORD dwWhichMoniker,__RPC__deref_out_opt IMoniker **ppmk);HRESULT STDMETHODCALLTYPE GetContainer(__RPC__deref_out_opt IOleContainer **ppContainer);HRESULT STDMETHODCALLTYPE ShowObject( void);HRESULT STDMETHODCALLTYPE OnShowWindow( BOOL fShow);HRESULT STDMETHODCALLTYPE RequestNewObjectLayout( void);//imp IOleInPlaceSiteHRESULT STDMETHODCALLTYPE CanInPlaceActivate( void);HRESULT STDMETHODCALLTYPE OnInPlaceActivate( void);HRESULT STDMETHODCALLTYPE OnUIActivate( void);HRESULT STDMETHODCALLTYPE GetWindowContext( __RPC__deref_out_opt IOleInPlaceFrame **ppFrame, __RPC__deref_out_opt IOleInPlaceUIWindow **ppDoc, __RPC__out LPRECT lprcPosRect, __RPC__out LPRECT lprcClipRect, __RPC__inout LPOLEINPLACEFRAMEINFO lpFrameInfo);HRESULT STDMETHODCALLTYPE Scroll( SIZE scrollExtant);HRESULT STDMETHODCALLTYPE OnUIDeactivate(  BOOL fUndoable);HRESULT STDMETHODCALLTYPE OnInPlaceDeactivate( void);HRESULT STDMETHODCALLTYPE DiscardUndoState( void);HRESULT STDMETHODCALLTYPE DeactivateAndUndo( void);HRESULT STDMETHODCALLTYPE OnPosRectChange( __RPC__in LPCRECT lprcPosRect);//imp IOleInPlaceFrame
    HRESULT STDMETHODCALLTYPE InsertMenus(  __RPC__in HMENU hmenuShared, __RPC__inout LPOLEMENUGROUPWIDTHS lpMenuWidths);HRESULT STDMETHODCALLTYPE SetMenu( __RPC__in HMENU hmenuShared,__RPC__in HOLEMENU holemenu,__RPC__in HWND hwndActiveObject);HRESULT STDMETHODCALLTYPE RemoveMenus(  __RPC__in HMENU hmenuShared);HRESULT STDMETHODCALLTYPE SetStatusText(  __RPC__in_opt LPCOLESTR pszStatusText);HRESULT STDMETHODCALLTYPE TranslateAccelerator(  __RPC__in LPMSG lpmsg, WORD wID);//imp IOleInPlaceUIWindow
    HRESULT STDMETHODCALLTYPE GetBorder( __RPC__out LPRECT lprectBorder);HRESULT STDMETHODCALLTYPE RequestBorderSpace( __RPC__in_opt LPCBORDERWIDTHS pborderwidths);HRESULT STDMETHODCALLTYPE SetBorderSpace( __RPC__in_opt LPCBORDERWIDTHS pborderwidths);HRESULT STDMETHODCALLTYPE SetActiveObject(  __RPC__in_opt IOleInPlaceActiveObject *pActiveObject, __RPC__in_opt_string LPCOLESTR pszObjName);//imp IOleWindowHRESULT STDMETHODCALLTYPE GetWindow( __RPC__deref_out_opt HWND *phwnd);HRESULT STDMETHODCALLTYPE ContextSensitiveHelp( BOOL fEnterMode);//imp IDocHostUIHandlerHRESULT STDMETHODCALLTYPE ShowContextMenu( DWORD dwID, POINT *ppt, IUnknown *pcmdtReserved,IDispatch *pdispReserved);HRESULT STDMETHODCALLTYPE GetHostInfo( DOCHOSTUIINFO *pInfo);HRESULT STDMETHODCALLTYPE ShowUI( DWORD dwID, IOleInPlaceActiveObject *pActiveObject, IOleCommandTarget *pCommandTarget, IOleInPlaceFrame *pFrame,IOleInPlaceUIWindow *pDoc);HRESULT STDMETHODCALLTYPE HideUI( void);HRESULT STDMETHODCALLTYPE UpdateUI( void);HRESULT STDMETHODCALLTYPE EnableModeless( BOOL fEnable);HRESULT STDMETHODCALLTYPE OnDocWindowActivate( BOOL fActivate);HRESULT STDMETHODCALLTYPE OnFrameWindowActivate( BOOL fActivate);HRESULT STDMETHODCALLTYPE ResizeBorder( LPCRECT prcBorder,IOleInPlaceUIWindow *pUIWindow,BOOL fRameWindow);HRESULT STDMETHODCALLTYPE TranslateAccelerator( LPMSG lpMsg, const GUID *pguidCmdGroup,DWORD nCmdID);HRESULT STDMETHODCALLTYPE GetOptionKeyPath( __out  LPOLESTR *pchKey,DWORD dw);HRESULT STDMETHODCALLTYPE GetDropTarget( IDropTarget *pDropTarget, IDropTarget **ppDropTarget);HRESULT STDMETHODCALLTYPE GetExternal(  IDispatch **ppDispatch);HRESULT STDMETHODCALLTYPE TranslateUrl( DWORD dwTranslate,__in __nullterminated  OLECHAR *pchURLIn,__out  OLECHAR **ppchURLOut);HRESULT STDMETHODCALLTYPE FilterDataObject( IDataObject *pDO,IDataObject **ppDORet);public:
void Resize(int width, int height);HRESULT BeforeNavigate2(std::wstring strUrl, DISPPARAMS* dispParams);static LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);private:void _initialize(HINSTANCE hInstApp );bool _makeTransparent();bool _registWndClass(HINSTANCE hInstApp );void _createWindow(HINSTANCE hInstApp);bool _embedBrowser();void _unenbedBrowser();void _openWebPage(std::wstring strUrl);private:HWND m_hWnd;IWebBrowser2* m_pWeb;IOleObject *m_pOleObj;IFlashPlayerDelegate *m_pDelegate;CBrowserEventBridge *m_pEvtBridge;};

 

再后来, 又发现了一个比较好的解决方法: 

代码如下, 直接通过handle控制qaxwidget的窗口属性. 

 

	HWND hWnd = (HWND)flash->winId(); LONG lStyle = ::GetWindowLong(hWnd, GWL_STYLE);lStyle &= ~(WS_CAPTION | WS_THICKFRAME | WS_MINIMIZE | WS_MAXIMIZE | WS_SYSMENU);::SetWindowLong(hWnd, GWL_STYLE, lStyle); LONG lExStyle = ::GetWindowLong(hWnd, GWL_EXSTYLE);::SetWindowLong(hWnd, GWL_EXSTYLE, lExStyle|WS_EX_LAYERED|WS_EX_TOPMOST|WS_EX_TRANSPARENT); typedef int (WINAPI* LPFUNC)(HWND, COLORREF , BYTE, DWORD);HINSTANCE hins = ::LoadLibraryW(L"User32.DLL");if(!hins)return ;LPFUNC func2 = (LPFUNC)GetProcAddress(hins,"SetLayeredWindowAttributes");if(!func2)return ;COLORREF clrMask = RGB(255,255,255);	func2(hWnd, clrMask, 0, LWA_COLORKEY);			FreeLibrary(hins);flash->setControl(QString::fromUtf8("{d27cdb6e-ae6d-11cf-96b8-444553540000}"));//connect(flash,SIGNAL(FSCommand(QString,QString)),this,SLOT(flashAction(QString,QString))); //用于处理FLASH传来的字符串flash->dynamicCall("LoadMovie(long,string)", 0, "d:/9023.swf"); //调用方法flash->dynamicCall("WMode", "transparent");

　　

 

就这几行代码, 被搞了好久.  幸好, 完美解决透明问题

 

2. 通过webview直接显示flash

下载 NPSWF32_13_0_0_182.dll

放置在exe目录下的plugins, 否则可能无法加载flash 插件

目录结构: 

test.exe

plugins

      └────NPSWF32_13_0_0_182.dll

 

显示本地flash 需要加file:/// , 如 file:///d:/myswf.swf

npswf.dll 在本人写文章时, 最新版是13, 大小15M. 

估计大部分可能无法接受这个大小

所以, 如果你没有用到很高级的flash特性的话, 建议找版本老一点的npswf. 

比如本人用的就是9.x版的npswf.dll, 大小仅为2.6M

 

还有另外一种方法, 为QWebView编写插件, 手动解析flash

这个方法是有很严重的bug, 这里只是说下思路, 并且该方法也可以用于解析pdf等等

1). 写一个webkit的插件

WebKitPluginInterface.h#pragma once#include <QWebPluginFactory>  
#include <QtPlugin>
class WebKitPluginInterface  
{  
public:  WebKitPluginInterface(){};  virtual ~WebKitPluginInterface(){};  virtual QList<QWebPluginFactory::Plugin> plugins()const =0;  virtual QObject *create(const QString &mimeType,  const QUrl &url,  const QStringList &argumentNames,  const QStringList &argumentValues) const =0;  
};  
QT_BEGIN_NAMESPACE 
//声明WebKitPluginInterface为一个接口  
Q_DECLARE_INTERFACE(WebKitPluginInterface, "org.Qt-Plugin.WebkitPluginFlash")
QT_END_NAMESPACE

bluefish.h#include "WebKitPluginInterface.h"class  bluefish: public QObject, public WebKitPluginInterface  {  Q_OBJECT  //Q_PLUGIN_METADATA(IID "org.qt-project.Qt.Examples.WebkitPluginFlash" FILE "bluefish.json")  Q_INTERFACES(WebKitPluginInterface) //声明WebKitPluginInterface是一个接口  public:  bluefish();  ~bluefish();  QList<QWebPluginFactory::Plugin> plugins()const ;  QObject *create(const QString &mimeType,  const QUrl &url,  const QStringList &argumentNames,  const QStringList &argumentValues) const ;  protected:
};  

#include "bluefish.h"
#include <QUrl>  
#include <QDebug>  
#include <QAxWidget>bluefish::bluefish(): WebKitPluginInterface(){};  bluefish::~bluefish(){};  QList<QWebPluginFactory::Plugin> bluefish::plugins()const  
{  qDebug()<<"bluefish::plugins";  QWebPluginFactory::MimeType mimeType;  mimeType.name="application/x-shockwave-flash";  mimeType.description=QObject::tr("flash");  mimeType.fileExtensions.append(".flv");  mimeType.fileExtensions.append(".f4v");  mimeType.fileExtensions.append(".swf");  QList<QWebPluginFactory::MimeType> mimeTypes;  mimeTypes.append(mimeType);  QWebPluginFactory::Plugin plugin;  plugin.name = QObject::tr("ldh flash plugin");  plugin.description=QObject::tr("ldh flash plugin description");  plugin.mimeTypes=mimeTypes;  QList<QWebPluginFactory::Plugin> plugins ;  plugins.append(plugin);  return plugins;  
}  QObject *bluefish::create(const QString &mimeType,  const QUrl &url,  const QStringList &argumentNames,  const QStringList &argumentValues) const  
{  qDebug()<<"bluefish::create";  QString strUrl = url.toString(); // 
QAxWidget *flash = new QAxWidget(0, 0);flash->setControl(QString::fromUtf8("{d27cdb6e-ae6d-11cf-96b8-444553540000}"));//connect(flash,SIGNAL(FSCommand(QString,QString)),this,SLOT(flashAction(QString,QString))); //用于处理FLASH传来的字符串flash->dynamicCall("LoadMovie(long,string)", 0, strUrl.toLocal8Bit().data()); //调用方法//flash->setControl("{ca8a9780-280d-11cf-a24d-444553540000}");//flash->dynamicCall("LoadFile( const string& )", "d:/bcomps.1.pdf");//for(int i = 0; i < argumentNames.length(); i++)//{//    flash->dynamicCall(argumentNames[i].toLocal8Bit().data(), argumentValues[i].toLocal8Bit().data()); //}
Q_UNUSED(argumentNames);  Q_UNUSED(argumentValues);  return flash;  
}  

 

bluefish是可以作为dll 动态载入的. 这里我为了方便, 就去掉了导出接口的部分. 

怎么编写一个Qt插件, 可以参考Qt exsample中的样例代码

把QAxWidget对象返回, webkit会自动显示. 

同理, 也可以在webkit中嵌入QtextEdit等等widget

ps:

//flash->setControl("{ca8a9780-280d-11cf-a24d-444553540000}");

这行代码就是显示pdf.

 

然后继承QWebPluginFactory载入我们编写的插件

qt_modules.h#include <QWebPluginFactory>  
#include <QUrl>  
#include "WebKitPluginInterface.h"class WebkitPluginFactory : public QWebPluginFactory  
{  Q_OBJECT  
public:  WebkitPluginFactory();  QObject *create ( const QString & mimeType, const QUrl & url, const QStringList & argumentNames, const QStringList & argumentValues ) const;  QList<QWebPluginFactory::Plugin> plugins () const;  private:  mutable QList<QList<QWebPluginFactory::Plugin> > pluginslist; // 插件列表  mutable QList<WebKitPluginInterface *> interfaces; //插件接口，这个接口是我们自定义的插件的同意接口。  
};  

 

qt_modules.cpp#include "qt_modules.h"
#include <QtNetwork\QNetworkProxyFactory>
#include <Qdir>
#include <QPluginLoader>  
#include <QLibrary>
#include <QDebug>  
#include <QDir>  
#include "bluefish.h"WebkitPluginFactory::WebkitPluginFactory() : QWebPluginFactory()  
{  qDebug()<<"=== ldh === WebkitPluginFactory::WebkitPluginFactory";  
}  QList<QWebPluginFactory::Plugin> WebkitPluginFactory::plugins () const  
{  qDebug()<<"=== ldh === WebkitPluginFactory::create";  static bool isFirst=true;  static QList<QWebPluginFactory::Plugin> plugins;  if(!isFirst)  {  return plugins;  }  isFirst=false;  plugins.clear();  bluefish *obj = new bluefish; WebKitPluginInterface * interface= qobject_cast<WebKitPluginInterface*> (obj);//载入自定义的接口，支持动态插件创建  plugins.append(interface->plugins());  pluginslist.append(interface->plugins());  interfaces.append(interface);  if(plugins.isEmpty()){  qDebug()<<"no plugins is loaded!";  }//QDir dir(QCoreApplication::applicationDirPath());  //QStringList filters;  //QString abspath=dir.absolutePath();  //qDebug()<<"the webkit plugin dir is:"<< abspath;  ////获取指定目录下的所有插件，linux下是插件库的后缀为so，windows下则是dll  //filters<<"*.dll";  //QStringList files=dir.entryList(filters);  //foreach(QString file,files)  //{  //    file=dir.filePath(file);//dir.filePath(file);  //file.absoluteFilePath();//    qDebug()<<"the webkit plugin path is: "<<file;         //    QPluginLoader loader(file);  //    QObject * obj= loader.instance();  //    if(!obj)//    {//        qDebug()<<"error: "<<loader.errorString();//        continue ; //    }  //    WebKitPluginInterface * interface= qobject_cast<WebKitPluginInterface*> (obj);//载入自定义的接口，支持动态插件创建  //    qDebug() << "loading plugins is: " << interface->plugins().at(0).name;  //    plugins.append(interface->plugins());  //    pluginslist.append(interface->plugins());  //    interfaces.append(interface);  //}  //if(plugins.isEmpty()){  //    qDebug()<<"no plugins is loaded!";  //}  return plugins;  
}  QObject * WebkitPluginFactory::create ( const QString & mimeType, const QUrl & url, const QStringList & argumentNames, const QStringList & argumentValues ) const  
{  qDebug()<<"=== ldh === WebkitPluginFactory::create";  for(int i=0;i<pluginslist.size();i++)  {  for( int j=0;j< pluginslist[i].size();j++)  {  foreach(QWebPluginFactory::MimeType mt, pluginslist[i][j].mimeTypes)  {  if(mt.name == mimeType) //根据MIME类型，创建相应的插件实例  
                {  return interfaces[i]->create( mimeType, url, argumentNames, argumentValues);  }  }  }  }  return NULL; //如果没有，直接返回NULL，webkit会进行处理的  
}  

 

注释部分是动态载入.  但其实不是必须的. 如果有多个插件的话, 可以这样做

 

    //初始化flash插件QNetworkProxyFactory::setUseSystemConfiguration (true);pWebView->settings()->setAttribute(QWebSettings::PluginsEnabled, true);  pWebView->settings()->setAttribute(QWebSettings::JavascriptEnabled, true);
    pWebView->page()->setPluginFactory(new WebkitPluginFactory());  

最后对QWebView 设置下就可以了

 

这个方法有个很严重的bug, 不能动态增加axwidget. 而对于普通QWidget对象, 则没有问题

即: 如果html在载入时必须确定所有的object(flash, pdf等). 不能动态增加

比如在html中用js增加html代码

这会导致webkit崩溃. 本人无法解决该bug. 无力-_-!

猜测原因可能是resize时, 绘图对象被提前删了

然后对于QWidget来说, 可以随意添加. 定制webkit还是很方便的