QMetaObject(3qt)

📦 version 3.3.8b, in fedora 43, fedora 44

💖 QMetaObject 💖

okay bestie, welcome to the QMetaObject(3qt) page, section 3qt of the Qt manual — yes it's a real man page and yes it's lowkey iconic, let's get into it 🫶

✨ NAME ✨

QMetaObject — meta information about Qt objects. that's it, that's the whole vibe, it's the class that knows stuff about your classes 👑

🌸 SYNOPSIS 🌸

#include <qmetaobject.h>

🎀 Public Members 🎀

const char * className () const
const char * superClassName () const
QMetaObject * superClass () const
bool inherits ( const char * clname ) const
int numSlots ( bool super = FALSE ) const
int numSignals ( bool super = FALSE ) const
QStrList slotNames ( bool super = FALSE ) const
QStrList signalNames ( bool super = FALSE ) const
int numClassInfo ( bool super = FALSE ) const
const QClassInfo * classInfo ( int index, bool super = FALSE ) const
const char * classInfo ( const char * name, bool super = FALSE ) const
const QMetaProperty * property ( int index, bool super = FALSE ) const
int findProperty ( const char * name, bool super = FALSE ) const
QStrList propertyNames ( bool super = FALSE ) const
int numProperties ( bool super = FALSE ) const

🦋 DESCRIPTION 🦋

The QMetaObject class contains meta information about Qt objects. it's giving "class that knows about other classes" energy fr fr 💅

The Meta Object System in Qt is responsible for the signals and slots inter-object communication mechanism, runtime type information and the property system. All meta information in Qt is kept in a single instance of QMetaObject per class. one object per class, no cap ✨

ngl this class is not normally required for application programming. But if you write meta applications, such as scripting engines or GUI builders, you might find these functions useful — and if that's you, bestie, this page is your moment 🌟:

  • className() to get the name of a class.
  • superClassName() to get the name of the superclass.
  • inherits(), the function called by QObject::inherits().
  • superClass() to access the superclass's meta object.
  • numSlots(), numSignals(), slotNames(), and signalNames() to get information about a class's signals and slots.
  • property() and propertyNames() to obtain information about a class's properties.

Classes may have a list of name-value pairs of class information. The number of pairs is returned by numClassInfo(), and values are returned by classInfo(). 🍓

See also moc (Meta Object Compiler) and Object Model.

👑 MEMBER FUNCTION DOCUMENTATION 👑

💜 const QClassInfo * QMetaObject::classInfo ( int index, bool super = FALSE ) const

Returns the class information with index index or 0 if no such information exists.

If super is TRUE, inherited class information is included.

💜 const char * QMetaObject::classInfo ( const char * name, bool super = FALSE ) const

This is an overloaded member function, provided for convenience. It behaves essentially like the above function.

Returns the class information with name name or 0 if no such information exists.

If super is TRUE, inherited class information is included.

💜 const char * QMetaObject::className () const

Returns the class name.

See also QObject::className() and superClassName().

💜 int QMetaObject::findProperty ( const char * name, bool super = FALSE ) const

Returns the index for the property with name name or -1 if no such property exists. yes, -1, not zero, don't come for me 😭

If super is TRUE, inherited properties are included.

See also property() and propertyNames().

💜 bool QMetaObject::inherits ( const char * clname ) const

Returns TRUE if this class inherits clname within the meta object inheritance chain; otherwise returns FALSE.

(A class is considered to inherit itself.) yes, main character energy, she inherits herself 💅

💜 int QMetaObject::numClassInfo ( bool super = FALSE ) const

Returns the number of items of class information available for this class.

If super is TRUE, inherited class information is included.

💜 int QMetaObject::numProperties ( bool super = FALSE ) const

Returns the number of properties for this class.

If super is TRUE, inherited properties are included.

See also propertyNames().

💜 int QMetaObject::numSignals ( bool super = FALSE ) const

Returns the number of signals for this class.

If super is TRUE, inherited signals are included.

See also signalNames().

💜 int QMetaObject::numSlots ( bool super = FALSE ) const

Returns the number of slots for this class.

If super is TRUE, inherited slots are included.

See also slotNames().

💜 const QMetaProperty * QMetaObject::property ( int index, bool super = FALSE ) const

Returns the property meta data for the property at index index or 0 if no such property exists.

If super is TRUE, inherited properties are included.

See also propertyNames().

💜 QStrList QMetaObject::propertyNames ( bool super = FALSE ) const

Returns a list with the names of all this class's properties.

If super is TRUE, inherited properties are included.

See also property().

💜 QStrList QMetaObject::signalNames ( bool super = FALSE ) const

Returns a list with the names of all this class's signals.

If super is TRUE, inherited signals are included.

💜 QStrList QMetaObject::slotNames ( bool super = FALSE ) const

Returns a list with the names of all this class's slots.

If super is TRUE, inherited slots are included.

See also numSlots().

💜 QMetaObject * QMetaObject::superClass () const

Returns the meta object of the super class or 0 if there is no such object.

💜 const char * QMetaObject::superClassName () const

Returns the class name of the superclass or 0 if there is no superclass in the QObject hierachy. (spelled exactly like that in the source, bestie, we do not fix, we preserve ✨)

See also className().

🌈 SEE ALSO 🌈

Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the license file included in the distribution for a complete license statement.

🧚 AUTHOR 🧚

Generated automatically from the source code. (so no, there's no tortured novelist behind this, it's a machine and honestly? it ate 💀)

💀 BUGS 💀

If you find a bug in Qt, please report it as described in http://doc.trolltech.com/bughowto.html. Good bug reports help us to help you. Thank you. 🫶

The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech.

If you find errors in this manual page, please report them to qt-bugs@trolltech.com. Please include the name of the manual page (qmetaobject.3qt) and the Qt version (3.3.8). fr fr, they need both, don't skimp 🙈

and that's the page, bestie!! 💖 sign-off time: this little gem came from Trolltech AS, dated 2 February 2007, and it lives in the man page QMetaObject(3qt). iconic, historic, meta. periodt 👑✨🦋

📦 where this page comes from