In Qt, we have an alternative to the callback technique: We use signals and slots. A signal is emitted when a particular event occurs. Qt's widgets have many predefined signals, but we can always subclass widgets to add our own signals to them. A slot is a function that is called in...
QTcpSocket with Signals and Slots In this tutorial, we will learn how to download a file usingQTcpSocket. This is a continued tutorial from the previous one,Qt 5 QTcpSocket. We're going to use Signal and Slot mechanism instead of calling functions manually(?). Note: Qt5 document The Q...
This tutorial describes how to dynamically create QPushButton buttons, receiving signals from these buttons, and the subsequent removal of these buttons from the layout Qt. Project Structure Description of the Project: DynamicButtons.pro - profile; mainwindow.h - header file of the main appl...
许多Qt特性的实现都是使用标准C++,继承自QObject,但是有些是例外,如对象通信机制(signals and slots)和动态属性系统(dynamic property system), 需要Qt自己的元对象编译器(moc)提供的元对象系统。 下面这些类是构成Qt对象模型的基础: 类名 作用 QMetaClassInfo ...
Here's a list of the episodes covered in this tutorial series: What is Qt Framework? Why Qt? Should you choose Qt for your project? Setting up the Qt Creator and creating the first project Signals and slots in Qt Qt Object tree - Parent-child relationship in Qt ...
For those who are new to use Qt, this tutorial may help you quickly develop a simple hello world program, http://www.wikihow.com/Create-Your-First-Qt-Program-on-Ubuntu-Linux, which is enough to make you familiar with the wedgets and qmake use in Qt. ...
For those who are new to use Qt, this tutorial may help you quickly develop a simple hello world program, http://www.wikihow.com/Create-Your-First-Qt-Program-on-Ubuntu-Linux, which is enough to make you familiar with the wedgets and qmake use in Qt. ...
private slots: void on_btnExit_clicked(); 4. 运行程序 你可能会觉得我忘了写 connect 函数来进行事件绑定了。但其实没有,这正是 Qt 神奇的地方,只要你在 MainWindow 的头文件中声明了其中的一个方法为槽函数(private slots:),它就会自动根据它的函数名on_btnExit_clicked,在窗口中寻找名为btnExit的控件,...
This tutorial's main focus is how to run external executable from Qt application. In this example, we usedQProcesson Windows 8. The external executables such asffmpeg.exeandffplay.exe The first step is to creating a QProcess object. Then, setup signals and slots in the constructor of FFmpeg...
## I prefer the Qt signals and slots to avoid defining "emit", "slots", ## etc because they can conflict with boost signals, so define QT_NO_KEYWORDS here. add_definitions(-DQT_NO_KEYWORDS) ## Here we specify which header files need to be run through "moc", ...