Qt 4.8
qgraphicssystemfactory.cpp
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41 
44 #include "private/qfactoryloader_p.h"
45 #include "qmutex.h"
46 
47 #include "qapplication.h"
50 #include "qdebug.h"
51 
53 
54 #ifndef QT_NO_LIBRARY
57 #endif
58 
60 {
61  QGraphicsSystem *ret = 0;
62  QString system = key.toLower();
63 
64 #if defined (QT_GRAPHICSSYSTEM_OPENGL)
65  if (system.isEmpty()) {
66  system = QLatin1String("opengl");
67  }
68 #elif defined (QT_GRAPHICSSYSTEM_OPENVG) && !defined(Q_CC_NOKIAX86)
69  if (system.isEmpty()) {
70  system = QLatin1String("openvg");
71  }
72 #elif defined (QT_GRAPHICSSYSTEM_RUNTIME)
73  if (system.isEmpty()) {
74  system = QLatin1String("runtime");
75  }
76 #elif defined (QT_GRAPHICSSYSTEM_RASTER) && !defined(Q_WS_WIN) && !defined(Q_OS_SYMBIAN) || defined(Q_WS_X11)
77  if (system.isEmpty()) {
78  system = QLatin1String("raster");
79  }
80 #endif
81 
82  if (system == QLatin1String("raster"))
83  return new QRasterGraphicsSystem;
84  else if (system == QLatin1String("runtime"))
85  return new QRuntimeGraphicsSystem;
86  else if (system.isEmpty() || system == QLatin1String("native"))
87  return 0;
88 
89 #ifndef QT_NO_LIBRARY
90  if (!ret) {
91  if (QGraphicsSystemFactoryInterface *factory = qobject_cast<QGraphicsSystemFactoryInterface*>(loader()->instance(system)))
92  ret = factory->create(system);
93  }
94 #endif
95 
96  if (!ret)
97  qWarning() << "Unable to load graphicssystem" << system;
98 
99  return ret;
100 }
101 
109 {
110 #ifndef QT_NO_LIBRARY
111  QStringList list = loader()->keys();
112 #else
113  QStringList list;
114 #endif
115  if (!list.contains(QLatin1String("Raster")))
116  list << QLatin1String("raster");
117  return list;
118 }
119 
121 
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
static QStringList keys()
Returns the list of valid keys, i.e.
QLatin1String(DBUS_INTERFACE_DBUS))) Q_GLOBAL_STATIC_WITH_ARGS(QString
The QString class provides a Unicode character string.
Definition: qstring.h:83
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
static QGraphicsSystem * create(const QString &)
bool isEmpty() const
Returns true if the string has no characters; otherwise returns false.
Definition: qstring.h:704
The QStringList class provides a list of strings.
Definition: qstringlist.h:66
Q_CORE_EXPORT void qWarning(const char *,...)
The QLatin1String class provides a thin wrapper around an US-ASCII/Latin-1 encoded string literal...
Definition: qstring.h:654
QBool contains(const QString &str, Qt::CaseSensitivity cs=Qt::CaseSensitive) const
Returns true if the list contains the string str; otherwise returns false.
Definition: qstringlist.h:172
int key
QString toLower() const Q_REQUIRED_RESULT
Returns a lowercase copy of the string.
Definition: qstring.cpp:5389
#define QGraphicsSystemFactoryInterface_iid
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,(QGraphicsSystemFactoryInterface_iid, QLatin1String("/graphicssystems"), Qt::CaseInsensitive)) QGraphicsSystem *QGraphicsSystemFactory