KGenericFactory< Product, ParentType > Class Template Reference

#include <kgenericfactory.h>

Inheritance diagram for KGenericFactory< Product, ParentType >:

Public Member Functions
	KGenericFactory (const char *instanceName=0)
	KGenericFactory (const TDEAboutData *data)
Public Member Functions inherited from KLibFactory
	KLibFactory (TQObject *parent=0, const char *name=0)
TQObject *	create (TQObject *parent=0, const char *name=0, const char *classname="TQObject", const TQStringList &args=TQStringList())

Protected Member Functions
virtual TQObject *	createObject (TQObject *parent, const char *name, const char *className, const TQStringList &args)
Protected Member Functions inherited from KLibFactory
virtual void	virtual_hook (int id, void *data)

Additional Inherited Members
Signals inherited from KLibFactory
void	objectCreated (TQObject *obj)

Detailed Description

template<class Product, class ParentType = TQObject>
class KGenericFactory< Product, ParentType >

This template provides a generic implementation of a KLibFactory , for use with shared library components.

It implements the pure virtual createObject method of KLibFactory and instantiates objects of the specified class (template argument) when the class name argument of createObject matches a class name in the given hierarchy.

In case you are developing a KParts component, skip this file and go directly to KParts::GenericFactory .

Note that the class specified as template argument needs to provide a certain constructor:

• If the class is derived from TQObject then it needs to have a constructor like: MyClass( TQObject *parent, const char *name, const TQStringList &args );
• If the class is derived from TQWidget then it needs to have a constructor like: MyWidget( TQWidget *parent, const char *name, const TQStringList &args);
• If the class is derived from KParts::Part then it needs to have a constructor like: MyPart( TQWidget *parentWidget, const char *widgetName, TQObject *parent, const char *name, const TQStringList &args );

The args TQStringList passed to the constructor is the args string list that the caller passed to KLibFactory's create method.

In addition upon instantiation this template provides a central TDEInstance object for your component, accessible through the static instance() method. The instanceName argument of the KGenericFactory constructor is passed to the TDEInstance object.

The creation of the TDEInstance object can be customized by inheriting from this template class and re-implementing the virtual createInstance method. For example it could look like this:

TDEInstance *MyFactory::createInstance()
{
    return new TDEInstance( myAboutData );
}

Example of usage of the whole template:

class MyPlugin : public KParts::Plugin
{
    Q_ OBJECT
public:
    MyPlugin( TQObject *parent, const char *name,
              const TQStringList &args );
    ...
};
 
K_EXPORT_COMPONENT_FACTORY( libmyplugin, KGenericFactory<MyPlugin> )

Definition at line 173 of file kgenericfactory.h.

Constructor & Destructor Documentation

KGenericFactory()

template<class Product , class ParentType = TQObject>

KGenericFactory< Product, ParentType >::KGenericFactory ( const TDEAboutData *  data )

inline

Since

3.3

Definition at line 183 of file kgenericfactory.h.

Member Function Documentation

createObject()

template<class Product , class ParentType = TQObject>

virtual TQObject* KGenericFactory< Product, ParentType >::createObject ( TQObject *  parent, const char *  name, const char *  className, const TQStringList &  args  )

inlineprotectedvirtual

Creates a new object.

The returned object has to be derived from the requested classname.

It is valid behavior to create different kinds of objects depending on the requested className. For example a koffice library may usually return a pointer to KoDocument. But if asked for a "TQWidget", it could create a wrapper widget, that encapsulates the Koffice specific features.

This function is called by create()

Parameters

parent	the parent of the TQObject, 0 for no parent
name	the name of the TQObject, 0 for no name
className	the name of the class
args	a list of arguments

Implements KLibFactory.

Definition at line 189 of file kgenericfactory.h.

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The documentation for this class was generated from the following file:

• kgenericfactory.h