QT浏览器插件开发入门

./QT浏览器插件开发入门简介主流的浏览器插件开发主要分为两种:ActiveX控件,适合IE核的浏览器NPAPI插件,适合Netscape浏览器的开发NPAPI全称为NetscapePluginApplicationProgrammingInterface在QT4.7.2下有这两种模式的开发支持,相关资料可在Qt文档上找到,ActiveX开发有QT提供ActiveQTserverlibrary支持库〔QT4.7.2,NPAPI开发QT4.7.2本身无此支持,需要下载相关的API,下载,解压后qtbrowserplugin目录就是。下面是完成的一个测试,首先做了一个功能库imagedemo,主要完成一个图片的显示功能,现在将它分别封装为ActiveX控件和NPAPI插件,供不同浏览器调用。ActiveX创建QTApplication工程工程名称：npgraphapp,创建时注意必须选择ActiveQTserverlibrary,如下图创建资源文件文件npgraphapp.rc中就一句话：1TYPELIB"npgraphapp.rc"修改类npgraphapp.h在文件中增加Q_CLASSINFO信息,代码如下：#ifndefNPGRAPHAPP_H#defineNPGRAPHAPP_H#include<QtGui/QtGui>classnpgraphapp:publicQWidget{ Q_OBJECT Q_CLASSINFO<"ClassID","{4CFCDEDD-F2F6-42E9-8671-D63D7B15AA2C}">; Q_CLASSINFO<"InterfaceID","{615B202B-C4F2-4C9F-B9F5-2F9D52ECF0BC}">; Q_CLASSINFO<"EventsID","{C9C4EB5F-F926-4770-AA7F-50702B53DB3E}">;public: npgraphapp<QWidget*parent=0>; ~npgraphapp<>;…};#endif//NPGRAPHAPP_H修改main.cpp在文件中增加QAXFACTORY_BEGIN宏,代码如下：#include"npgraphapp.h"#include<QtGui/QApplication>#include<ActiveQt/QAxFactory>QAXFACTORY_BEGIN<"{5E2C9F73-03E9-4351-9ECC-C46697D1A8D5}","{443A7F7F-FFE1-498A-AECB-D3EBCD5810CB}">QAXCLASS<npgraphapp>QAXFACTORY_END<>intmain<intargc,char*argv[]>{ QApplicationa<argc,argv>; if<!QAxFactory::isServer<>> { npgraphapp*w=newnpgraphapp<>; w->show<>; } returna.exec<>;}修改工程属性增加生成事件,如下图：在命令行中编辑〔注册ActiveX控件C:\Qt\4.7.2\bin\idc.exe$<TargetPath>/idl$<IntDir>\npgraphapp.idl-version1.0iferrorlevel1gotoVCReportErrormidl$<IntDir>\npgraphapp.idl/nologo/tlb$<IntDir>\npgraphapp.tlbiferrorlevel1gotoVCReportErrorC:\Qt\4.7.2\bin\idc.exe$<TargetPath>/tlb$<IntDir>\npgraphapp.tlbiferrorlevel1gotoVCReportErrorC:\Qt\4.7.2\bin\idc.exe$<TargetPath>/regserver注册和调用工程编译后自动生成事件会注册组件,注意看编译信息是否注册成功测试组件<OBJECTID="npgraphdemo"CLASSID="CLSID:4CFCDEDD-F2F6-42E9-8671-D63D7B15AA2C"HEIGHT="80%"WIDTH="80%"ALIGN="LEFT"></OBJECT>问题：如果仅仅在界面上绘制可创建QTActive库,如果界面上需调用其它QT控件或自定义的QT控件,需创建为可执行文件才可以NPAPI创建QTLibrary工程名称：npgraphdemo下载,解压后qtbrowserplugin目录就是NPAPI的封装支持,使用src中的文件,将下列的五个文件拷贝到工程目录下,在工程中加入qtnpapi.hqtbrowserplugin.hqtbrowserplugin_p.hqtbrowserplugin.cppqtbrowserplugin_win.cpp〔windows操作系统增加资源文件文件名称是npgraphdemo.rc,容如下1VERSIONINFOFILEVERSION1,0,0,1PRODUCTVERSION1,0,0,1FILEFLAGSMASK0x3fL#ifdef_DEBUGFILEFLAGS0x1L#elseFILEFLAGS0x0L#endifFILEOS0x4LFILETYPE0x2LFILESUBTYPE0x0LBEGINBLOCK"StringFileInfo"BEGINBLOCK"040904e4"BEGINVALUE"Comments","\0"VALUE"CompanyName","Nokia\0"VALUE"FileDescription","grapher\0"VALUE"FileExtents","g1n\0"VALUE"FileOpenName","Graphabledata<*.g1n>\0"VALUE"FileVersion","1,0,0,1\0"VALUE"InternalName","npgraphdemo\0"VALUE"LegalTrademarks","\0"VALUE"MIMEType","application/grapher"VALUE"OriginalFilename","npgraphdemo.dll\0"VALUE"PrivateBuild","\0"VALUE"ProductName","graphernpapiexample\0"VALUE"ProductVersion","1,0,0,1\0"VALUE"SpecialBuild","\0"ENDENDBLOCK"VarFileInfo"BEGINVALUE"Translation",0x409,1252ENDEND注意VALUE"MIMEType","application/grapher"这句,其中的MIMEType后面字符串为自定义类型新建模块定义文件在工程选择"新建项",创建npgraphdemo.def,如下图文件容：LIBRARY "npgraphdemo"EXPORTS NP_GetEntryPoints1 NP_Initialize2 NP_Shutdown3修改npgraphdemo.h在文件增加Q_CLASSINFO定义,注意Q_CLASSINFO<"MIME","application/grapher:g1n:GraphableASCIInumericdata">,此处的定义要和资源文件的MIMEType定义的一致#ifndefGRAPHFROM_H#defineGRAPHFROM_H#include<QtGui/QtGui>#include<qtbrowserplugin.h>QT_BEGIN_NAMESPACEclassQVBoxLayout;QT_END_NAMESPACEclassnpgraphdemo:publicQWidget,publicQtNPBindable{ Q_OBJECT Q_CLASSINFO<"ClassID","{2e5b2715-46b2-4831-ba9b-6a3b195d5ec8}"> Q_CLASSINFO<"InterfaceID","{94581136-3c0c-46cc-97a1-066061356d43}"> Q_CLASSINFO<"EventsID","{8c191b77-1894-45c7-9d6b-201dede95410}"> Q_CLASSINFO<"MIME","application/grapher:g1n:GraphableASCIInumericdata"> Q_CLASSINFO<"ToSuperClass","npgraphdemo">public: npgraphdemo<QWidget*parent=0>; ~npgraphdemo<>;…};#endif//GRAPHFROM_H修改npgraphdemo.cpp在文件中增加QTNPFACTORY_BEGIN宏#include"npgraphdemo.h"#include"imagedemo.h"npgraphdemo::npgraphdemo<QWidget*parent>:QWidget<parent>{…}npgraphdemo::~npgraphdemo<>{}QTNPFACTORY_BEGIN<"Qt-basedGraphPlugin","AQt-basedNSAPIplug-inthatgraphsnumericdata">;QTNPCLASS<npgraphdemo>QTNPFACTORY_END<>修改工程属性在"C/C++"下"预处理器"选项,增加"_X86_",如下图编译即可注册和调用注册方法如下1、在命令行中输入regedit,打开注册表编辑2、在HKEYLOCALMACHIN\SOFTWARE\MozillaPlugins下新建子项/