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Internal/Contributor docs for the Qt SDK. Note: These are NOT official API docs; those are found at https://doc.qt.io/
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QQmlSettings Class Reference

#include <qqmlsettings_p.h>

Inheritance diagram for QQmlSettings:
Collaboration diagram for QQmlSettings:

Signals

void categoryChanged (const QString &arg)
void locationChanged (const QUrl &arg)
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.

Public Member Functions

 QQmlSettings (QObject *parent=nullptr)
 ~QQmlSettings () override
QString category () const
 \qmlproperty string Settings::category
void setCategory (const QString &category)
QUrl location () const
 \qmlproperty url Settings::location
void setLocation (const QUrl &location)
Q_INVOKABLE QVariant value (const QString &key, const QVariant &defaultValue={}) const
 \qmlmethod var Settings::value(string key, var defaultValue)
Q_INVOKABLE void setValue (const QString &key, const QVariant &value)
 \qmlmethod Settings::setValue(string key, var value)
Q_INVOKABLE void sync ()
 \qmlmethod Settings::sync()
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< QStringbindableObjectName ()
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 isQmlObjectType () const
 Returns whether the object has been created by the QML engine or ownership has been explicitly set via QJSEngine::setObjectOwnership().
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).
QThreadthread () 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>
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>
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 QObjectListchildren () 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< QByteArraydynamicPropertyNames () const
QBindingStoragebindingStorage ()
const QBindingStoragebindingStorage () const
QObjectparent () 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.
Public Member Functions inherited from QQmlParserStatus
 QQmlParserStatus ()
virtual ~QQmlParserStatus ()

Protected Member Functions

void timerEvent (QTimerEvent *event) override
 This event handler can be reimplemented in a subclass to receive timer events for the object.
void classBegin () override
 Invoked after class creation, but before any properties have been set.
void componentComplete () override
 Invoked after the root component that caused this instantiation has completed construction.
Protected Member Functions inherited from QObject
QObjectsender () 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)

Properties

QString category
QUrl location
Properties inherited from QObject
QString objectName
 the name of this object

Additional Inherited Members

Public Slots inherited from QObject
void deleteLater ()
 \threadsafe
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)
Protected Attributes inherited from QObject
QScopedPointer< QObjectDatad_ptr

Detailed Description

Definition at line 30 of file qqmlsettings_p.h.

Constructor & Destructor Documentation

◆ QQmlSettings()

QQmlSettings::QQmlSettings ( QObject * parent = nullptr)
explicit

Definition at line 366 of file qqmlsettings.cpp.

◆ ~QQmlSettings()

QQmlSettings::~QQmlSettings ( )
override

Definition at line 373 of file qqmlsettings.cpp.

Member Function Documentation

◆ category()

QString QQmlSettings::category ( ) const

\qmlproperty string Settings::category

This property holds the name of the settings category.

Categories can be used to group related settings together.

See also
QSettings::group

Definition at line 388 of file qqmlsettings.cpp.

◆ categoryChanged

void QQmlSettings::categoryChanged ( const QString & arg)
signal

◆ classBegin()

void QQmlSettings::classBegin ( )
overrideprotectedvirtual

Invoked after class creation, but before any properties have been set.

Implements QQmlParserStatus.

Definition at line 483 of file qqmlsettings.cpp.

◆ componentComplete()

void QQmlSettings::componentComplete ( )
overrideprotectedvirtual

Invoked after the root component that caused this instantiation has completed construction.

At this point all static values and binding values have been assigned to the class.

Implements QQmlParserStatus.

Definition at line 487 of file qqmlsettings.cpp.

◆ location()

QUrl QQmlSettings::location ( ) const

\qmlproperty url Settings::location

This property holds the path to the settings file. If the file doesn't already exist, it will be created.

If this property is empty (the default), then QSettings::defaultFormat() will be used. Otherwise, QSettings::IniFormat will be used.

See also
QSettings::fileName, QSettings::defaultFormat, QSettings::IniFormat

Definition at line 417 of file qqmlsettings.cpp.

◆ locationChanged

void QQmlSettings::locationChanged ( const QUrl & arg)
signal

◆ setCategory()

void QQmlSettings::setCategory ( const QString & category)

Definition at line 394 of file qqmlsettings.cpp.

◆ setLocation()

void QQmlSettings::setLocation ( const QUrl & location)

Definition at line 423 of file qqmlsettings.cpp.

◆ setValue()

void QQmlSettings::setValue ( const QString & key,
const QVariant & value )

\qmlmethod Settings::setValue(string key, var value)

Sets the value of setting key to value. If the key already exists, the previous value is overwritten.

See also
QSettings::setValue

Definition at line 457 of file qqmlsettings.cpp.

◆ sync()

void QQmlSettings::sync ( )

\qmlmethod Settings::sync()

Writes any unsaved changes to permanent storage, and reloads any settings that have been changed in the meantime by another application.

This function is called automatically from QSettings's destructor and by the event loop at regular intervals, so you normally don't need to call it yourself.

See also
QSettings::sync

Definition at line 477 of file qqmlsettings.cpp.

◆ timerEvent()

void QQmlSettings::timerEvent ( QTimerEvent * event)
overrideprotectedvirtual

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 493 of file qqmlsettings.cpp.

◆ value()

QVariant QQmlSettings::value ( const QString & key,
const QVariant & defaultValue = {} ) const

\qmlmethod var Settings::value(string key, var defaultValue)

Returns the value for setting key. If the setting doesn't exist, returns defaultValue.

See also
QSettings::value

Definition at line 443 of file qqmlsettings.cpp.

Property Documentation

◆ category

QString QQmlSettings::category
readwrite

Definition at line 38 of file qqmlsettings_p.h.

◆ location

QUrl QQmlSettings::location
readwrite

Definition at line 39 of file qqmlsettings_p.h.


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