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39
40 #include "qstylefactory.h"
41 #include "qstyleplugin.h"
42 #include "private/qfactoryloader_p.h"
43 #include "qmutex.h"
44
45 #include "qapplication.h"
46 #include "qwindowsstyle_p.h"
47 #if QT_CONFIG(style_fusion)
48 #include "qfusionstyle_p.h"
49 #endif
50
51 QT_BEGIN_NAMESPACE
52
53 Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
54 (QStyleFactoryInterface_iid, QLatin1String("/styles"), Qt::CaseInsensitive))
55
56 /*!
57 \class QStyleFactory
58 \brief The QStyleFactory class creates QStyle objects.
59
60 \ingroup appearance
61 \inmodule QtWidgets
62
63 The QStyle class is an abstract base class that encapsulates the
64 look and feel of a GUI. QStyleFactory creates a QStyle object
65 using the create() function and a key identifying the style. The
66 styles are either built-in or dynamically loaded from a style
67 plugin (see QStylePlugin).
68
69 The valid keys can be retrieved using the keys()
70 function. Typically they include "windows" and "fusion".
71 Depending on the platform, "windowsvista"
72 and "macintosh" may be available.
73 Note that keys are case insensitive.
74
75 \sa QStyle
76 */
77
78 /*!
79 Creates and returns a QStyle object that matches the given \a key, or
80 returns \nullptr if no matching style is found.
81
82 Both built-in styles and styles from style plugins are queried for a
83 matching style.
84
85 \note The keys used are case insensitive.
86
87 \sa keys()
88 */
create(const QString & key)89 QStyle *QStyleFactory::create(const QString& key)
90 {
91 QStyle *ret = nullptr;
92 QString style = key.toLower();
93 #if QT_CONFIG(style_windows)
94 if (style == QLatin1String("windows"))
95 ret = new QWindowsStyle;
96 else
97 #endif
98 #if QT_CONFIG(style_fusion)
99 if (style == QLatin1String("fusion"))
100 ret = new QFusionStyle;
101 else
102 #endif
103 { } // Keep these here - they make the #ifdefery above work
104 if (!ret)
105 ret = qLoadPlugin<QStyle, QStylePlugin>(loader(), style);
106 if(ret)
107 ret->setObjectName(style);
108 return ret;
109 }
110
111 /*!
112 Returns the list of valid keys, i.e. the keys this factory can
113 create styles for.
114
115 \sa create()
116 */
keys()117 QStringList QStyleFactory::keys()
118 {
119 QStringList list;
120 typedef QMultiMap<int, QString> PluginKeyMap;
121
122 const PluginKeyMap keyMap = loader()->keyMap();
123 const PluginKeyMap::const_iterator cend = keyMap.constEnd();
124 for (PluginKeyMap::const_iterator it = keyMap.constBegin(); it != cend; ++it)
125 list.append(it.value());
126 #if QT_CONFIG(style_windows)
127 if (!list.contains(QLatin1String("Windows")))
128 list << QLatin1String("Windows");
129 #endif
130 #if QT_CONFIG(style_fusion)
131 if (!list.contains(QLatin1String("Fusion")))
132 list << QLatin1String("Fusion");
133 #endif
134 return list;
135 }
136
137 QT_END_NAMESPACE
138