Slot In Main Qt



  1. Slot In Main Qt Box
  2. Qt Slot In Main
  3. Qt Slot In Main Cpp
  4. Slot In Main Qt Table
  5. Slot In Main Qts
Slot

In this post we will see how to add the click event to the QPushbutton with an example.

Qt implements menus in QMenu and QMainWindow keeps them in a QMenuBar. QActions are added to the menus, which display them as menu items. You can add new menus to the main window's menu bar by calling menuBar, which returns the QMenuBar for the window, and then add a menu with QMenuBar::addMenu. A slot is a function that is called in response to a particular signal. Qt's widgets have many pre-defined slots, but it is common practice to subclass widgets and add your own slots so that you can handle the signals that you are interested in. Signals and slots is a language construct introduced also in Qt for communication between objects which makes it easy to implement the observer pattern while avoiding boilerplate code. The concept is that GUI widgets can send signals containing event information which can be received by other widgets / controls using special functions known as.

Thus, you can access the object that was loaded into the context of the QML engine, call its slot, and process the signal from this object. It is also not necessary to declare receiveFromQml as a slot in this case. This method can also be declared as QINVOKABLE method.

samples.pro

samples.pro
Slot

Qt Slot In Main

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#define MYMAINWINDOW_H
#include <QMessageBox>
#include <QVBoxLayout>
classMyMainWindow:publicQMainWindow
Q_OBJECT
public:
~MyMainWindow(){}
voidExecute()
QPushButton*button2=newQPushButton(this);
button->setText('Button No. 1');
QObject::connect(button,SIGNAL(clicked()),this,SLOT(clickedSlot()));
QObject::connect(button2,SIGNAL(clicked()),this,SLOT(clickedSlot()));
button->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
button2->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
QWidget*centralWidget=newQWidget(this);
centralWidget->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
QVBoxLayout*layout=newQVBoxLayout(centralWidget);
layout->addWidget(button);
setWindowTitle('Pushbutton Clicked Signal Test');
}
publicslots:
{
msgBox.setWindowTitle('MessageBox Title');
msgBox.setText('You Clicked '+((QPushButton*)sender())->text());
}
#endif // MYMAINWINDOW_H
Slot In Main Qt

main.cpp

Qt Slot In Main Cpp