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Internal/Contributor docs for the Qt SDK. <b>Note:</b> These are NOT official API docs; those are found <a href='https://doc.qt.io/'>here</a>.
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Classes | Public Types | Public Member Functions | Static Public Member Functions | Public Attributes | Private Member Functions | List of all members
QFontCache Class Reference

#include <qfont_p.h>

+ Inheritance diagram for QFontCache:
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Classes

struct  Engine
 
struct  Key
 

Public Types

typedef QMap< QFontDef, QFontEngineData * > EngineDataCache
 
typedef QMultiMap< Key, Engine > EngineCache
 

Public Member Functions

 QFontCache ()
 
 ~QFontCache ()
 
int id () const
 
void clear ()
 
QFontEngineData * findEngineData (const QFontDef &def) const
 
void insertEngineData (const QFontDef &def, QFontEngineData *engineData)
 
QFontEngine * findEngine (const Key &key)
 
void updateHitCountAndTimeStamp (Engine &value)
 
void insertEngine (const Key &key, QFontEngine *engine, bool insertMulti=false)
 
- Public Member Functions inherited from QObject
Q_INVOKABLE QObject (QObject *parent=nullptr)
 Constructs an object with parent object parent.
 
virtual ~QObject ()
 Destroys the object, deleting all its child objects.
 
virtual bool event (QEvent *event)
 This virtual function receives events to an object and should return true if the event e was recognized and processed.
 
virtual bool eventFilter (QObject *watched, QEvent *event)
 Filters events if this object has been installed as an event filter for the watched object.
 
QString objectName () const
 
Q_WEAK_OVERLOAD void setObjectName (const QString &name)
 Sets the object's name to name.
 
void setObjectName (QAnyStringView name)
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
QBindable< QString > bindableObjectName ()
 
bool isWidgetType () const
 Returns true if the object is a widget; otherwise returns false.
 
bool isWindowType () const
 Returns true if the object is a window; otherwise returns false.
 
bool isQuickItemType () const
 Returns true if the object is a QQuickItem; otherwise returns false.
 
bool signalsBlocked () const noexcept
 Returns true if signals are blocked; otherwise returns false.
 
bool blockSignals (bool b) noexcept
 If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it).
 
QThread * thread () const
 Returns the thread in which the object lives.
 
bool moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
 Changes the thread affinity for this object and its children and returns true on success.
 
int startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
 This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.
 
int startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)
 
void killTimer (int id)
 Kills the timer with timer identifier, id.
 
void killTimer (Qt::TimerId id)
 
template<typename T >
T findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.
 
template<typename T >
QList< T > findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects.
 
template<typename T >
T findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
template<typename T >
QList< T > findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
const QObjectList & children () const
 Returns a list of child objects.
 
void setParent (QObject *parent)
 Makes the object a child of parent.
 
void installEventFilter (QObject *filterObj)
 Installs an event filter filterObj on this object.
 
void removeEventFilter (QObject *obj)
 Removes an event filter object obj from this object.
 
QMetaObject::Connection connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
 
bool disconnect (const char *signal=nullptr, const QObject *receiver=nullptr, const char *member=nullptr) const
 
bool disconnect (const QObject *receiver, const char *member=nullptr) const
 
void dumpObjectTree () const
 Dumps a tree of children to the debug output.
 
void dumpObjectInfo () const
 Dumps information about signal connections, etc.
 
bool setProperty (const char *name, const QVariant &value)
 Sets the value of the object's name property to value.
 
bool setProperty (const char *name, QVariant &&value)
 
QVariant property (const char *name) const
 Returns the value of the object's name property.
 
QList< QByteArray > dynamicPropertyNames () const
 
QBindingStorage * bindingStorage ()
 
const QBindingStorage * bindingStorage () const
 
QObject * parent () const
 Returns a pointer to the parent object.
 
bool inherits (const char *classname) const
 Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false.
 

Static Public Member Functions

static QFontCache * instance ()
 
static void cleanup ()
 
- Static Public Member Functions inherited from QObject
static QMetaObject::Connection connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
 \threadsafe
 
static QMetaObject::Connection connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
 
template<typename Func1 , typename Func2 >
static QMetaObject::Connection connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType *context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)
 
template<typename Func1 , typename Func2 >
static QMetaObject::Connection connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot)
 
static bool disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
 \threadsafe
 
static bool disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
 
static bool disconnect (const QMetaObject::Connection &)
 Disconnect a connection.
 
template<typename Func1 , typename Func2 >
static bool disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object *receiver, Func2 slot)
 
template<typename Func1 >
static bool disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const QObject *receiver, void **zero)
 

Public Attributes

EngineDataCache engineDataCache
 
EngineCache engineCache
 
QHash< QFontEngine *, int > engineCacheCount
 

Private Member Functions

void timerEvent (QTimerEvent *event) override
 This event handler can be reimplemented in a subclass to receive timer events for the object.
 

Additional Inherited Members

- Public Slots inherited from QObject
void deleteLater ()
 \threadsafe
 
- Signals inherited from QObject
void destroyed (QObject *=nullptr)
 This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.
 
void objectNameChanged (const QString &objectName, QPrivateSignal)
 This signal is emitted after the object's name has been changed.
 
- Protected Member Functions inherited from QObject
QObject * sender () const
 Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.
 
int senderSignalIndex () const
 
int receivers (const char *signal) const
 Returns the number of receivers connected to the signal.
 
bool isSignalConnected (const QMetaMethod &signal) const
 
virtual void childEvent (QChildEvent *event)
 This event handler can be reimplemented in a subclass to receive child events.
 
virtual void customEvent (QEvent *event)
 This event handler can be reimplemented in a subclass to receive custom events.
 
virtual void connectNotify (const QMetaMethod &signal)
 
virtual void disconnectNotify (const QMetaMethod &signal)
 
 QObject (QObjectPrivate &dd, QObject *parent=nullptr)
 
- Protected Attributes inherited from QObject
QScopedPointer< QObjectData > d_ptr
 
- Properties inherited from QObject
QString objectName
 the name of this object
 
- Related Symbols inherited from QObject
 Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr.
 
 
 
 \macro Q_CLASSINFO(Name, Value)
 

Detailed Description

Definition at line 214 of file qfont_p.h.

Member Typedef Documentation

◆ EngineCache

typedef QMultiMap<Key,Engine> QFontCache::EngineCache

Definition at line 271 of file qfont_p.h.

◆ EngineDataCache

typedef QMap<QFontDef, QFontEngineData*> QFontCache::EngineDataCache

Definition at line 255 of file qfont_p.h.

Constructor & Destructor Documentation

◆ QFontCache()

QFontCache::QFontCache ( )

Definition at line 3358 of file qfont.cpp.

◆ ~QFontCache()

QFontCache::~QFontCache ( )

Definition at line 3368 of file qfont.cpp.

References clear().

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Member Function Documentation

◆ cleanup()

void QFontCache::cleanup ( )
static

Definition at line 3344 of file qfont.cpp.

References cache, QT_CATCH, and QT_TRY.

Referenced by QFont::cleanup().

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◆ clear()

void QFontCache::clear ( )

Definition at line 3373 of file qfont.cpp.

References QMap< Key, T >::begin(), QMultiMap< Key, T >::begin(), QMap< Key, T >::clear(), QMultiMap< Key, T >::clear(), QHash< Key, T >::clear(), QMap< Key, T >::end(), QMultiMap< Key, T >::end(), engine, engineCache, engineCacheCount, engineDataCache, FC_DEBUG, i, it, QFontEngine::Multi, Q_ASSERT, and QHash< Key, T >::value().

Referenced by ~QFontCache().

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◆ findEngine()

QFontEngine * QFontCache::findEngine ( const Key & key)

Definition at line 3464 of file qfont.cpp.

References QMultiMap< Key, T >::end(), engineCache, QMultiMap< Key, T >::find(), it, QFontEngine::Multi, Q_ASSERT, and updateHitCountAndTimeStamp().

Referenced by QFontDatabasePrivate::findFont().

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◆ findEngineData()

QFontEngineData * QFontCache::findEngineData ( const QFontDef & def) const

Definition at line 3433 of file qfont.cpp.

References QMap< Key, T >::constEnd(), QMap< Key, T >::constFind(), engineDataCache, and it.

Referenced by QFontDatabasePrivate::load().

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◆ id()

int QFontCache::id ( ) const
inline

Definition at line 224 of file qfont_p.h.

◆ insertEngine()

void QFontCache::insertEngine ( const Key & key,
QFontEngine * engine,
bool insertMulti = false )

Definition at line 3491 of file qfont.cpp.

References QMultiMap< Key, T >::contains(), QFontCache::Engine::data, engine, engineCache, engineCacheCount, FC_DEBUG, QMultiMap< Key, T >::insert(), QFontEngine::Multi, Q_ASSERT, QFONTCACHE_DECREASE_TRIGGER_LIMIT, QMultiMap< Key, T >::replace(), QMultiMap< Key, T >::size(), and QMultiMap< Key, T >::value().

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◆ insertEngineData()

void QFontCache::insertEngineData ( const QFontDef & def,
QFontEngineData * engineData )

Definition at line 3443 of file qfont.cpp.

References QMap< Key, T >::contains(), engineDataCache, FC_DEBUG, QFontDef::fixedPitch, QMap< Key, T >::insert(), QFontDef::pixelSize, QFontDef::pointSize, Q_ASSERT, QFONTCACHE_DECREASE_TRIGGER_LIMIT, QBasicAtomicInteger< T >::ref(), QFontEngineData::ref, QMap< Key, T >::size(), QFontDef::style, QMap< Key, T >::value(), and QFontDef::weight.

Referenced by QFontDatabasePrivate::load().

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◆ instance()

QFontCache * QFontCache::instance ( )
static

Definition at line 3336 of file qfont.cpp.

Referenced by QFontDatabasePrivate::addAppFont(), QFontEngineMulti::createMultiFontEngine(), QWasmFontDatabase::derefFontFileLoading(), QPainter::drawStaticText(), QWasmFontDatabase::endAllFontFileLoading(), QFontPrivate::engineForScript(), QFontDatabasePrivate::findFont(), QCocoaTheme::handleSystemThemeChange(), QFontDatabasePrivate::invalidate(), QFontDatabasePrivate::load(), QFontDatabase::removeApplicationFallbackFontFamily(), and QFontDatabase::setApplicationFallbackFontFamilies().

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◆ timerEvent()

void QFontCache::timerEvent ( QTimerEvent * event)
overrideprivatevirtual

This event handler can be reimplemented in a subclass to receive timer events for the object.

QChronoTimer provides higher-level interfaces to the timer functionality, and also more general information about timers. The timer event is passed in the event parameter.

See also
startTimer(), killTimer(), event()

Reimplemented from QObject.

Definition at line 3558 of file qfont.cpp.

References FC_DEBUG, and QObject::killTimer().

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◆ updateHitCountAndTimeStamp()

void QFontCache::updateHitCountAndTimeStamp ( Engine & value)

Definition at line 3479 of file qfont.cpp.

References engineCacheCount, FC_DEBUG, and QHash< Key, T >::value().

Referenced by findEngine().

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Member Data Documentation

◆ engineCache

EngineCache QFontCache::engineCache

Definition at line 272 of file qfont_p.h.

Referenced by clear(), findEngine(), and insertEngine().

◆ engineCacheCount

QHash<QFontEngine *, int> QFontCache::engineCacheCount

Definition at line 273 of file qfont_p.h.

Referenced by clear(), insertEngine(), and updateHitCountAndTimeStamp().

◆ engineDataCache

EngineDataCache QFontCache::engineDataCache

Definition at line 256 of file qfont_p.h.

Referenced by clear(), findEngineData(), and insertEngineData().

The documentation for this class was generated from the following files: