Qt 顯示透明flash和編寫QtWebkit插件

時間 2019-11-13

標籤顯示透明 flash 編寫 qtwebkit 插件欄目 Flash 简体版

原文原文鏈接

Qt 有兩種方法能夠顯示flash.html

1. 經過QAxWidget 調用com形式顯示flash, 須要本機安裝IE flash插件linux

2. 直接經過qwebview顯示flash, 須要下載webkit 的flash插件 NPSWF32.dllweb

1. 經過IE顯示flash 是一般作法. QAxWidget提供很方便的嵌入, 只是IE對頁面的支持可能不是很好json

可是QAxWidget有個最大的問題, 不支持透明的flashwindows

若是直接設置frameless 和tranparent background的話, qaxwidget會整個窗口直接透明的. 瀏覽器

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

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

摸索了好久, 最開始的解決方案爲使用IWebBrowser2模擬出一個瀏覽器, 代碼複雜的很, 繼承一堆com 的東西. 估計有點像簡潔版的mfc html控件ide

概要以下:ui

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:
        //播放完畢回調
        virtual HRESULT OnFlashPlayEnd() = 0;
    };

    CFlashPlayer(IFlashPlayerDelegate *pDelegate);
    ~CFlashPlayer();

    //imp IUnknown
    ULONG STDMETHODCALLTYPE AddRef( void);
    ULONG STDMETHODCALLTYPE Release( void);
    HRESULT STDMETHODCALLTYPE QueryInterface( REFIID riid,__RPC__deref_out void __RPC_FAR *__RPC_FAR *ppvObject);

    //imp IOleClientSite
    HRESULT 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 IOleInPlaceSite
    HRESULT 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 IOleWindow
    HRESULT STDMETHODCALLTYPE GetWindow( __RPC__deref_out_opt HWND *phwnd);
    HRESULT STDMETHODCALLTYPE ContextSensitiveHelp( BOOL fEnterMode);

    //imp IDocHostUIHandler
    HRESULT 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;

};

再後來, 又發現了一個比較好的解決方法:

代碼以下, 直接經過handle控制qaxwidget的窗口屬性.

	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))); //用於處理FLASH傳來的字符串
	flash->dynamicCall("LoadMovie(long,string)", 0, "d:/9023.swf"); //調用方法
	flash->dynamicCall("WMode", "transparent");

就這幾行代碼, 被搞了很久. 幸虧, 完美解決透明問題

2. 經過webview直接顯示flash

下載 NPSWF32_13_0_0_182.dll

放置在exe目錄下的plugins, 不然可能沒法加載flash 插件

目錄結構:

test.exe

plugins

└────NPSWF32_13_0_0_182.dll

顯示本地flash 須要加file:/// , 如 file:///d:/myswf.swf

npswf.dll 在本人寫文章時, 最新版是13, 大小15M.

估計大部分可能沒法接受這個大小

因此, 若是你沒有用到很高級的flash特性的話, 建議找版本老一點的npswf.

好比本人用的就是9.x版的npswf.dll, 大小僅爲2.6M

還有另一種方法, 爲QWebView編寫插件, 手動解析flash

這個方法是有很嚴重的bug, 這裏只是說下思路, 而且該方法也能夠用於解析pdf等等

1). 寫一個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 
//聲明WebKitPluginInterface爲一個接口  
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) //聲明WebKitPluginInterface是一個接口  

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))); //用於處理FLASH傳來的字符串
    flash->dynamicCall("LoadMovie(long,string)", 0, strUrl.toLocal8Bit().data()); //調用方法

    //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是能夠做爲dll 動態載入的. 這裏我爲了方便, 就去掉了導出接口的部分.

怎麼編寫一個Qt插件, 能夠參考Qt exsample中的樣例代碼

把QAxWidget對象返回, webkit會自動顯示.

同理, 也能夠在webkit中嵌入QtextEdit等等widget

ps:

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

這行代碼就是顯示pdf.

而後繼承QWebPluginFactory載入咱們編寫的插件

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，這個接口是咱們自定義的插件的贊成接口。  
};

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);//載入自定義的接口，支持動態插件建立  
    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;  

    ////獲取指定目錄下的全部插件，linux下是插件庫的後綴爲so，windows下則是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);//載入自定義的接口，支持動態插件建立  
    //    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) //根據MIME類型，建立相應的插件實例  
                {  
                    return interfaces[i]->create( mimeType, url, argumentNames, argumentValues);  
                }  
            }  
        }  
    }  
    return NULL; //若是沒有，直接返回NULL，webkit會進行處理的  
}

註釋部分是動態載入. 但其實不是必須的. 若是有多個插件的話, 能夠這樣作

    //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());

最後對QWebView 設置下就能夠了

這個方法有個很嚴重的bug, 不能動態增長axwidget. 而對於普通QWidget對象, 則沒有問題

即: 若是html在載入時必須肯定全部的object(flash, pdf等). 不能動態增長

好比在html中用js增長html代碼

這會致使webkit崩潰. 本人沒法解決該bug. 無力-_-!

猜想緣由多是resize時, 繪圖對象被提早刪了

而後對於QWidget來講, 能夠隨意添加. 定製webkit仍是很方便的