1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
#ifndef __tdeparts__genericfactory_h__
#define __tdeparts__genericfactory_h__
#include <tdeparts/factory.h>
#include <tdeparts/part.h>
#include <kgenericfactory.h>
#include <kaboutdata.h>
#include <kdebug.h>
namespace KParts
{
/**
* @internal
*/
template <class T>
class GenericFactoryBase : public KParts::Factory
{
public:
GenericFactoryBase()
{
if ( s_self )
kdWarning() << "KParts::GenericFactory instantiated more than once!" << endl;
s_self = this;
}
virtual ~GenericFactoryBase()
{
delete s_aboutData;
delete s_instance;
s_aboutData = 0;
s_instance = 0;
s_self = 0;
}
static TDEInstance *instance();
static TDEAboutData *aboutData();
protected:
virtual TDEInstance *createInstance()
{
return new TDEInstance( aboutData() );
}
virtual void virtual_hook( int id, void *data )
{
if ( id != VIRTUAL_QUERY_INSTANCE_PARAMS ) {
KParts::Factory::virtual_hook( id, data );
return;
}
QueryInstanceParams *params = reinterpret_cast<QueryInstanceParams *>( data );
params->instance = instance();
}
private:
static GenericFactoryBase<T> *s_self;
static TDEInstance *s_instance;
static TDEAboutData *s_aboutData;
};
/**
* A template for a KParts::Factory implementation. It implements the pure virtual
* createPartObject method by instantiating the template argument when requested
* through the className field. In addition it is a container for a part's TDEInstance
* object, by providing a static TDEInstance *instance() method.
*
* The template argument has to inherit from KParts::Part and has to implement two methods:
* 1) There needs to be a public constructor with the following signature:
* MyPart( TQWidget *parentWidget, const char *widgetName, TQObject *parent, const char *name, const TQStringList& args )
*
* 2) It needs to provide one static method to create a TDEAboutData object per
* request, holding information about the component's name, its authors, license, etc.
* The signature of that static method has to be
* TDEAboutData *createAboutData()
*
* The template will take care of memory management of the TDEInstance and the TDEAboutData object,
* meaning ownership of what createAboutData returns is passed to the caller (this template) .
*
* For advanced use you can also inherit from the template and re-implement additionally the
* virtual TDEInstance *createInstance() method, for example in case you want to extend the
* paths of your instance's TDEStandardDirs object.
*
* If a KParts::ReadOnlyPart is requested through this factory and the template argument
* implements a KParts::ReadWritePart then setReadWrite( false ) will automatically be
* called in createPartObject.
*
* Use the factory through the K_EXPORT_COMPONENT_FACTORY macro, like that:
* \code
* typedef KParts::GenericFactory<YourKPart> YourKPartFactory;
* K_EXPORT_COMPONENT_FACTORY( yourlibrary, YourKPartFactory )
* \endcode
* yourlibrary is the library name that you compiled your KPart into.
*/
template <class T>
class GenericFactory : public GenericFactoryBase<T>
{
public:
GenericFactory() { }
virtual KParts::Part *createPartObject( TQWidget *parentWidget, const char *widgetName,
TQObject *parent, const char *name,
const char *className,
const TQStringList &args )
{
T *part = KDEPrivate::ConcreteFactory<T>::create( parentWidget,
widgetName,
parent,
name,
className,
args );
if ( part && !qstrcmp( className, "KParts::ReadOnlyPart" ) )
{
KParts::ReadWritePart *rwp = tqt_dynamic_cast<KParts::ReadWritePart *>( part );
if ( rwp )
rwp->setReadWrite( false );
}
return part;
}
};
template <class T1, class T2>
class GenericFactory< KTypeList<T1, T2> > : public GenericFactoryBase<T1>
{
public:
GenericFactory() { }
virtual KParts::Part *createPartObject( TQWidget *parentWidget, const char *widgetName,
TQObject *parent, const char *name,
const char *className,
const TQStringList &args )
{
TQObject *object = KDEPrivate::MultiFactory< KTypeList<T1, T2> >::create( parentWidget,
widgetName,
parent, name,
className,
args );
// (this cast is guaranteed to work...)
KParts::Part *part = tqt_dynamic_cast<KParts::Part *>( object );
if ( part && !qstrcmp( className, "KParts::ReadOnlyPart" ) )
{
KParts::ReadWritePart *rwp = tqt_dynamic_cast<KParts::ReadWritePart *>( part );
if ( rwp )
rwp->setReadWrite( false );
}
return part;
}
};
/**
* @internal
*/
template <class T>
GenericFactoryBase<T> *GenericFactoryBase<T>::s_self = 0;
/**
* @internal
*/
template <class T>
TDEInstance *GenericFactoryBase<T>::s_instance = 0;
/**
* @internal
*/
template <class T>
TDEAboutData *GenericFactoryBase<T>::s_aboutData = 0;
/**
* @internal
*/
template <class T>
TDEInstance *GenericFactoryBase<T>::instance()
{
if ( !s_instance )
{
if ( s_self )
s_instance = s_self->createInstance();
else
s_instance = new TDEInstance( aboutData() );
}
return s_instance;
}
/**
* @internal
*/
template <class T>
TDEAboutData *GenericFactoryBase<T>::aboutData()
{
if ( !s_aboutData )
s_aboutData = T::createAboutData();
return s_aboutData;
}
}
#endif
/**
* vim: et sw=4
*/
|
