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105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
#ifndef QT_HELPERS_HPP_
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#define QT_HELPERS_HPP_
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#include <stdexcept>
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#include <QString>
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#include <QChar>
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#include <QMetaObject>
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#include <QHostAddress>
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#include <QDataStream>
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#include <QMetaType>
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#include <QMetaEnum>
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#define ENUM_QDATASTREAM_OPS_DECL(CLASS, ENUM) \
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QDataStream& operator << (QDataStream&, CLASS::ENUM const&); \
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QDataStream& operator >> (QDataStream&, CLASS::ENUM&);
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#define ENUM_QDATASTREAM_OPS_IMPL(CLASS, ENUM) \
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QDataStream& operator << (QDataStream& os, CLASS::ENUM const& v) \
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{ \
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auto const& mo = CLASS::staticMetaObject; \
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return os << mo.enumerator (mo.indexOfEnumerator (#ENUM)).valueToKey (static_cast<int> (v)); \
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} \
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\
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QDataStream& operator >> (QDataStream& is, CLASS::ENUM& v) \
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{ \
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char * buffer; \
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is >> buffer; \
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bool ok {false}; \
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auto const& mo = CLASS::staticMetaObject; \
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auto const& me = mo.enumerator (mo.indexOfEnumerator (#ENUM)); \
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if (buffer) \
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{ \
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v = static_cast<CLASS::ENUM> (me.keyToValue (buffer, &ok)); \
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delete [] buffer; \
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} \
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if (!ok) \
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{ \
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v = static_cast<CLASS::ENUM> (me.value (0)); \
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} \
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return is; \
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}
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#define ENUM_CONVERSION_OPS_DECL(CLASS, ENUM) \
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QString enum_to_qstring (CLASS::ENUM const&);
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#define ENUM_CONVERSION_OPS_IMPL(CLASS, ENUM) \
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QString enum_to_qstring (CLASS::ENUM const& m) \
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{ \
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auto const& mo = CLASS::staticMetaObject; \
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return QString {mo.enumerator (mo.indexOfEnumerator (#ENUM)).valueToKey (static_cast<int> (m))}; \
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}
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inline
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void throw_qstring (QString const& qs)
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{
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throw std::runtime_error {qs.toLocal8Bit ().constData ()};
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}
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QString font_as_stylesheet (QFont const&);
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// do what is necessary to change a dynamic property and trigger any
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// conditional style sheet updates
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void update_dynamic_property (QWidget *, char const * property, QVariant const& value);
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template <class T>
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class VPtr
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{
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public:
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static T * asPtr (QVariant v)
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{
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return reinterpret_cast<T *> (v.value<void *> ());
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}
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static QVariant asQVariant(T * ptr)
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{
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return qVariantFromValue (reinterpret_cast<void *> (ptr));
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}
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};
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namespace std
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{
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// std::hash<> specialization for QString based on the dbj2
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// algorithm http://www.cse.yorku.ca/~oz/hash.html because qHash()
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// is poor on 64-bit platforms due to being a 32-bit hash value
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template<>
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struct hash<QString>
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{
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std::size_t operator () (QString const& s) const noexcept
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{
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std::size_t hash {5381};
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for (int i = 0; i < s.size (); ++i)
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{
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hash = ((hash << 5) + hash) + ((s.at (i).row () << 8) | s.at (i).cell ());
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}
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return hash;
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}
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};
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}
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// Register some useful Qt types with QMetaType
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Q_DECLARE_METATYPE (QHostAddress);
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#endif
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