Qt slot function return value

By Author

Nov 23, 2014 ... Signals and Slots are a feature of Qt used for communication ... the GUI with a progress bar, then kick off a function to handle this input. ... I will emit the signal when the button is pressed, passing the value of the text field.

Qt: Signals & Slots | return 0; } Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt and probably the part that differs most from the features provided by other frameworks. A callback is a pointer to a function, so if you want a processing function to notify you... Как работают сигналы и слоты в Qt (часть 2) / Хабр От переводчика: это вторая часть перевода статьи Olivier Goffart о внутренней архитектуре сигналов и слотов в Qt 5, перевод первой части тут. Новый синтаксис в Qt5 Новый синтаксис выглядит... Qt 4.8: Signals & Slots Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt and probably the part that differs mostNote that the setValue() function sets the value and emits the signal only if value != m_value. This prevents infinite looping in the case of cyclic...

QMetaObject Class | Qt Core 5.12.2

ReadFunc is used in registerFormat() as a pointer to a function that reads a set of key/value pairs. ReadFunc should read all the options in one pass, and return all the settings in the SettingsMap container, which is initially empty. QGraphicsItem Class | Qt Widgets 5.12.3

PyQt QSpinBox Widget - Tutorialspoint

On windowing systems that do not make this information visible to the application, isExposed() will simply return the same value as isVisible(). QSettings Class | Qt Core 5.12.2 ReadFunc is used in registerFormat() as a pointer to a function that reads a set of key/value pairs. ReadFunc should read all the options in one pass, and return all the settings in the SettingsMap container, which is initially empty. QGraphicsItem Class | Qt Widgets 5.12.3 The return value is unused; you cannot adjust anything in this notification. Note that the new child might not be fully constructed when this notification is sent; calling pure virtual functions on the child can lead to a crash. QWebEnginePage Class | Qt WebEngine 5.12.3

This method is also a Qt slot with the C++ signature void ... QVariant QAbstractSpinBox.inputMethodQuery ... This function returns a pointer to the line edit of the ...

Calculator Example | Qt Widgets 5.12.3 The private createButton() function is used as part of the widget construction. abortOperation() is called whenever a division by zero occurs or when a square root operation is applied to a negative number. QAbstractItemModel Class | Qt Core 5.12.3 [virtual] bool QAbstractItemModel:: setHeaderData( int section, Qt::Orientation orientation, const QVariant & value, int role = Qt::EditRole) The QtWebKit Bridge | Qt 4.8 The slot onClicked() prints the value of x as stored in the form. Application Example | Qt Widgets 5.12.2