Initial Commit

.svn/pristine/e8/e8b4496201b516520ef3a4bf5f1962e2f7274b5e.svn-base

@@ -0,0 +1,109 @@
+#ifndef QT_HELPERS_HPP_
+#define QT_HELPERS_HPP_
+
+#include <stdexcept>
+
+#include <QString>
+#include <QMetaObject>
+#include <QHostAddress>
+#include <QDataStream>
+#include <QMetaType>
+#include <QMetaEnum>
+
+#define ENUM_QDATASTREAM_OPS_DECL(CLASS, ENUM)				\
+  QDataStream& operator << (QDataStream&, CLASS::ENUM const&);			\
+  QDataStream& operator >> (QDataStream&, CLASS::ENUM&);
+
+#define ENUM_QDATASTREAM_OPS_IMPL(CLASS, ENUM)				\
+  QDataStream& operator << (QDataStream& os, CLASS::ENUM const& v)		\
+  {									\
+    auto const& mo = CLASS::staticMetaObject;				\
+    return os << mo.enumerator (mo.indexOfEnumerator (#ENUM)).valueToKey (v); \
+  }									\
+									\
+  QDataStream& operator >> (QDataStream& is, CLASS::ENUM& v)		\
+  {									\
+    char * buffer;							\
+    is >> buffer;							\
+    bool ok {false};							\
+    auto const& mo = CLASS::staticMetaObject;				\
+    auto const& me = mo.enumerator (mo.indexOfEnumerator (#ENUM)); \
+    if (buffer)								\
+      {									\
+	v = static_cast<CLASS::ENUM> (me.keyToValue (buffer, &ok));	\
+	delete [] buffer;						\
+      }									\
+    if (!ok)								\
+      {									\
+	v = static_cast<CLASS::ENUM> (me.value (0));			\
+      }									\
+    return is;								\
+  }
+
+#define ENUM_CONVERSION_OPS_DECL(CLASS, ENUM)	\
+  QString enum_to_qstring (CLASS::ENUM const&);
+
+#define ENUM_CONVERSION_OPS_IMPL(CLASS, ENUM)				\
+  QString enum_to_qstring (CLASS::ENUM const& m)				\
+  {									\
+    auto const& mo = CLASS::staticMetaObject;				\
+    return QString {mo.enumerator (mo.indexOfEnumerator (#ENUM)).valueToKey (m)}; \
+  }
+
+#if QT_VERSION >= 0x050500
+
+// Qt 5.5 now has Q_ENUM which registers enumns better
+#define ENUM_QDEBUG_OPS_DECL(CLASS, ENUM)
+#define ENUM_QDEBUG_OPS_IMPL(CLASS, ENUM)
+
+#else
+
+#define Q_ENUM(E)
+
+#include <QDebug>
+
+class QVariant;
+
+#define ENUM_QDEBUG_OPS_DECL(CLASS, ENUM)				\
+  QDebug operator << (QDebug, CLASS::ENUM const&);
+
+#define ENUM_QDEBUG_OPS_IMPL(CLASS, ENUM)				\
+  QDebug operator << (QDebug d, CLASS::ENUM const& m)				\
+  {									\
+    auto const& mo = CLASS::staticMetaObject;				\
+    return d << mo.enumerator (mo.indexOfEnumerator (#ENUM)).valueToKey (m); \
+  }
+
+#endif
+
+inline
+void throw_qstring (QString const& qs)
+{
+  throw std::runtime_error {qs.toLocal8Bit ().constData ()};
+}
+
+QString font_as_stylesheet (QFont const&);
+
+// do what is necessary to change a dynamic property and trigger any
+// conditional style sheet updates
+void update_dynamic_property (QWidget *, char const * property, QVariant const& value);
+
+template <class T>
+class VPtr
+{
+public:
+  static T * asPtr (QVariant v)
+  {
+    return reinterpret_cast<T *> (v.value<void *> ());
+  }
+
+  static QVariant asQVariant(T * ptr)
+  {
+    return qVariantFromValue (reinterpret_cast<void *> (ptr));
+  }
+};
+
+// Register some useful Qt types with QMetaType
+Q_DECLARE_METATYPE (QHostAddress);
+
+#endif