Главной особенностью библиотеки Qt является технология сигналов и слотов ( Signals and slots). Не могу вам сказать что она чем-то значительно лучше других подходов, но мне эта штука нравится :). В чем же суть. Создание собственных виджетов Qt. Сигналы, слоты и… Когда я начинал изучать библиотеку Qt, весьма полезным показался пример виджета, выводящего бегущую строку. Подобный пример описан в настоящей статье, на нем мы разберем: Механизм сигналов и слотов Qt; Организацию объектов Qt в древовидную структуру... Qt: Сигналы и слоты (выдержка из документации Qt 4.x)
Aug 20, 2015 ... While Qt signal/slot is the moc driven signaling system of Qt (which ... sender and its slot, this time as a method-pointer, and then followed by a ...
Qt provides the QObject::sender() function, which returns a pointer to the object that sent the signal Note: if the slot was not activated by a signal, the return is undefined • Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal • It is possible to connect a signal ... Getting the most of signal/slot connections : Viking Software ... Getting the most of signal/slot connections. ... it needs a pointer to it, ... that you can’t put QObjects in containers or smart pointers. Often the alternatives ... Implementing my own signal slot mechanism using C++11 I programmed in C# and I used the Qt framework. Both of them have their own signal slot mechanism which are really powerful. I looked at several implementations in C++ and based on what I learnt from Guarded Pointers in Qt 3 and Qt 4 Qt 4's QPointer class provides the same functionality as Qt 3's QGuardedPtr, but with much less overhead. A QPointer still requires one signal--slot connection, but the only other overhead is a single pointer. Internally, Qt achieves this by using a special kind of signal--slot connection, where the target object is a QPointer instead of a QObject.
QSharedPointer Class | Qt Core 5.12.3
Why I dislike Qt signals/slots (Originally posted on Sunday, February 19th, 2012.) I've created over a dozen small projects using Qt by now. Most of the time I think I might as well make use of Qt's signals/slots system -- I mean it's already there.
Q3NetworkProtocol Class | Qt 4.8
I agree, we need an API to integrate with Qt signals since resources captured by the lambda will not be released as long as the connection lives (which is your point). fa987a5 wasn't intended to fix it but only the reported issue which was that the QNetwork shared pointer wasn't released when the promise was resolved and gone. PythonQt: Class List Base class for signal receivers C PythonQtSignalTarget: Stores information about a signal target C PythonQtSingleShotTimer C PythonQtSlotDecorator C PythonQtSlotFunctionObject: Defines a python object that stores a Qt slot info C PythonQtSlotInfo: Stores information about a slot, including a next pointer to overloaded slots C PythonQtStdDecorators c++ : Qt Can't Have Model and View on different Threads? I wanted to cite this mailing list question from me about models and views on different threads in Qt (along with the ensuing answers). The qt-interest mailing list entries from 2009 seem to have all but disappeared from the web, but I found this one in an Internet Archive cache off of "gmane". QtLua project home - Welcome [Savannah] Qt QObject wrapping enables creation and manipulation of QObject objects from Lua. QObject properties, enumerations, slots and children objects can be accessed from Lua. Qt Signals can be connected directly to Lua functions. A qt Lua library is available and contains functions to create QObject and manage signal/slot connections from Lua.
Welcome to the Qt wiki
Smart Pointers - Qt Wiki A smart pointer is an abstract data type that has all features of a standard pointer and additionally provides automatic garbage collection. Smart pointers facilitate the dynamic memory operations. Their main advantage is reducing memory leaks and bugs due to poor memory management. Smart Pointers in Qt. QSharedDataPointer c++ - Qt is it possible to define a function pointer in The connect and disconnect code for all the signals will be the same, as is the slot handler that the signals connect to. Instead of writing this code over and over. I would like to use a function pointer or something similar to assign to the signal, then have a common code block which performs the connection or disconnection.
QtDD13 - Olivier Goffart - Signals and Slots in Qt 5 - YouTube Signals and Slot is one of the Qt's key concept. Qt 5 introduce a new connection syntax, which allows compile time checking, smart type conversion, connection to lambdas, and more. Welcome to the Qt wiki Welcome to the Qt wiki. Here the Qt community has gathered information on Qt over the years. Everything here is created and maintained by the community. Please take a look at the below information before you start contributing. I STRONGLY NEED to know slot where signal is connected to.