Qt slots with return values
methods and extending 'Qt' classes from R. Other packages build upon .... the values are double, a QSizeF instance is returned, otherwise an instance of .... These are typically signals and slots, although arbitrary methods/constructors are also ...
QEventLoop Class | Qt Core 5.12.2 From within the event loop, calling exit() will force exec() to return. QSpinBox Class | Qt Widgets 5.12 The spin box supports integer values but can be extended to use different strings with validate(), textFromValue() and valueFromText(). Creating Custom Qt Types | Qt Core 5.12.3
Qt Signals And Slots In Threads. qt signals and slots in threads May 31, 2010 · Hi there, I have been doing some basic network programming using Qt and want to further my knowledge to tackle the following problem. First some background info. I have a network accessible device that accepts UDP packets on a particular port.
Using C++11 Lambdas As Qt Slots – asmaloney.com Mar 13, 2016 ... I still work on it, keeping up-to-date with Qt and C++ as much as possible, and .... The one we'll use here is [=] which says to capture all variables from the local scope by value. ... We leave out the return type so void is inferred. How C++ lambda expressions can improve your Qt code - Medium
Sep 12, 2013 ... Since Qt 5 was released I had been putting off upgrading to Qt 5 on a project I have ... SIGNAL and SLOT used in the connect method calls are macros that ... used in the body by value) connect(pushButton, &QPushButton::clicked, .... and performs functions such as recognizing you when you return to our ...
[virtual] bool QAbstractItemModel:: setHeaderData( int section, Qt::Orientation orientation, const QVariant & value, int role = Qt::EditRole) QPushButton Class | Qt Widgets 5.12.2 In Qt, the QAbstractButton base class provides most of the modes and other API, and QPushButton provides GUI logic. See QAbstractButton for more information about the API. Exposing Attributes of C++ Types to QML | Qt QML 5.12.3 Due to the tight integration of the QML engine with the Qt meta-object system, any functionality that is appropriately exposed by a QObject-derived class is accessible from QML code. Qt Namespace | Qt Core 5.12.3
This is a convenience static function that will return a file name selected by the user. The file does not have to exist.
Sending Python values with signals and slots. On the #pyqt channel on Freenode, Khertan asked about sending Python values via Qt's signals and slots mechanism.. The following example uses the PyQt_PyObject value declaration with an old-style signal-slot connection, and again when the signal is emitted, to communicate a Python dictionary.
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