# kparts Library API Documentation

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# genericfactory.h

    00001 #ifndef __kparts__genericfactory_h__
    00002 #define __kparts__genericfactory_h__
    00003
    00004 #include <kparts/factory.h>
    00005 #include <kparts/part.h>
    00006 #include <kgenericfactory.h>
    00007 #include <kaboutdata.h>
    00008 #include <kdebug.h>
    00009
    00010 namespace KParts
    00011 {
    00012
    00016     template <class T>
    00017     class GenericFactoryBase : public KParts::Factory
    00018     {
    00019     public:
    00020         GenericFactoryBase()
    00021         {
    00022             if ( s_self )
    00023                 kdWarning() << "KParts::GenericFactory instantiated more than once!" << endl;
    00024             s_self = this;
    00025         }
    00026         virtual ~GenericFactoryBase()
    00027         {
    00028             delete s_aboutData;
    00029             delete s_instance;
    00030             s_aboutData = 0;
    00031             s_instance = 0;
    00032             s_self = 0;
    00033         }
    00034
    00035         static KInstance *instance();
    00036         static KAboutData *aboutData();
    00037
    00038     protected:
    00039         virtual KInstance *createInstance()
    00040         {
    00041             return new KInstance( aboutData() );
    00042         }
    00043
    00044     private:
    00045         static GenericFactoryBase<T> *s_self;
    00046         static KInstance *s_instance;
    00047         static KAboutData *s_aboutData;
    00048     };
    00049
    00082     template <class T>
    00083     class GenericFactory : public GenericFactoryBase<T>
    00084     {
    00085     public:
    00086         GenericFactory() { }
    00087
    00088         virtual KParts::Part *createPartObject( QWidget *parentWidget, const char *widgetName,
    00089                                                 QObject *parent, const char *name,
    00090                                                 const char *className,
    00091                                                 const QStringList &args )
    00092         {
    00093             T *part = KDEPrivate::ConcreteFactory<T>::create( parentWidget,
    00094                                                               widgetName,
    00095                                                               parent,
    00096                                                               name,
    00097                                                               className,
    00098                                                               args );
    00099
    00100             if ( part && !qstrcmp( className, "KParts::ReadOnlyPart" ) )
    00101             {
    00102                 KParts::ReadWritePart *rwp = dynamic_cast<KParts::ReadWritePart *>( part );
    00103                 if ( rwp )
    00104                     rwp->setReadWrite( false );
    00105             }
    00106             return part;
    00107         }
    00108     };
    00109
    00110     template <class T1, class T2>
    00111     class GenericFactory< KTypeList<T1, T2> > : public GenericFactoryBase<T1>
    00112     {
    00113     public:
    00114         GenericFactory() { }
    00115
    00116         virtual KParts::Part *createPartObject( QWidget *parentWidget, const char *widgetName,
    00117                                                 QObject *parent, const char *name,
    00118                                                 const char *className,
    00119                                                 const QStringList &args )
    00120         {
    00121             QObject *object = KDEPrivate::MultiFactory< KTypeList<T1, T2> >::create( parentWidget,
    00122                                                                                      widgetName,
    00123                                                                                      parent, name,
    00124                                                                                      className,
    00125                                                                                      args );
    00126
    00127             // (this cast is guaranteed to work...)
    00128             KParts::Part *part = dynamic_cast<KParts::Part *>( object );
    00129
    00130             if ( part && !qstrcmp( className, "KParts::ReadOnlyPart" ) )
    00131             {
    00132                 KParts::ReadWritePart *rwp = dynamic_cast<KParts::ReadWritePart *>( part );
    00133                 if ( rwp )
    00134                     rwp->setReadWrite( false );
    00135             }
    00136             return part;
    00137         }
    00138     };
    00139
    00143     template <class T>
    00144     GenericFactoryBase<T> *GenericFactoryBase<T>::s_self = 0;
    00145
    00149     template <class T>
    00150     KInstance *GenericFactoryBase<T>::s_instance = 0;
    00151
    00155     template <class T>
    00156     KAboutData *GenericFactoryBase<T>::s_aboutData = 0;
    00157
    00161     template <class T>
    00162     KInstance *GenericFactoryBase<T>::instance()
    00163     {
    00164         if ( !s_instance )
    00165         {
    00166             if ( s_self )
    00167                 s_instance = s_self->createInstance();
    00168             else
    00169                 s_instance = new KInstance( aboutData() );
    00170         }
    00171         return s_instance;
    00172     }
    00173
    00177     template <class T>
    00178     KAboutData *GenericFactoryBase<T>::aboutData()
    00179     {
    00180         if ( !s_aboutData )
    00181             s_aboutData = T::createAboutData();
    00182         return s_aboutData;
    00183     }
    00184
    00185 }
    00186
    00187 #endif
    00188

This file is part of the documentation for kdelibs Version 3.1.5.
Documentation copyright © 1996-2002 the KDE developers.
Generated on Wed Jan 28 13:26:50 2004 by doxygen 1.3.4 written by Dimitri van Heesch, © 1997-2001