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varianthandler.h
1 /*
2  varianthandler.h
3 
4  This file is part of GammaRay, the Qt application inspection and
5  manipulation tool.
6 
7  Copyright (C) 2013-2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
8  Author: Volker Krause <volker.krause@kdab.com>
9 
10  This program is free software; you can redistribute it and/or modify
11  it under the terms of the GNU General Public License as published by
12  the Free Software Foundation, either version 2 of the License, or
13  (at your option) any later version.
14 
15  This program is distributed in the hope that it will be useful,
16  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  GNU General Public License for more details.
19 
20  You should have received a copy of the GNU General Public License
21  along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23 
24 #ifndef GAMMARAY_VARIANTHANDLER_H
25 #define GAMMARAY_VARIANTHANDLER_H
26 
27 #include "gammaray_core_export.h"
28 
29 #include <QVariant>
30 
31 namespace GammaRay {
32 
34 namespace VariantHandler
35 {
37  template <typename RetT> struct Converter
38  {
39  virtual RetT operator() (const QVariant &v) = 0;
40  };
41 
42  template <typename RetT, typename InputT, typename FuncT> struct ConverterImpl
43  : public Converter<RetT>
44  {
45  explicit inline ConverterImpl(FuncT converter) : f(converter)
46  {
47  }
48 
49  /*override*/
50  inline RetT operator() (const QVariant &v)
51  {
52  return f(v.value<InputT>());
53  }
54  FuncT f;
55  };
57 
65  GAMMARAY_CORE_EXPORT QString displayString(const QVariant &value);
66 
73  template <typename T>
74  inline QString displayString(T value) { return displayString(QVariant::fromValue<T>(value)); }
75 
82  GAMMARAY_CORE_EXPORT QVariant decoration(const QVariant &value);
83 
88  GAMMARAY_CORE_EXPORT void registerStringConverter(int type, Converter<QString> *converter);
89 
94  template <typename T, typename FuncT>
95  inline void registerStringConverter(FuncT f)
96  {
97  Converter<QString> *converter = new ConverterImpl<QString, T, FuncT>(f);
98  registerStringConverter(qMetaTypeId<T>(), converter);
99  }
100 
101  typedef QString(*GenericStringConverter)(const QVariant &value, bool *ok);
110  GAMMARAY_CORE_EXPORT void registerGenericStringConverter(GenericStringConverter converter);
111 }
112 
113 }
114 
115 #endif // GAMMARAY_VARIANTHANDLER_H

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"The Qt Experts"
http://www.kdab.com/
GammaRay
Qt-application inspection and manipulation tool
http://www.kdab.com/kdab-products/gammaray/