How to use dynamically-created buttons

Hamza.B

hello everybody, in my Qt app I have a class that generates dynamically some buttons.
this is the class that generates the pushbuttons: I used the method "add buttons( i, v) to generate a number of buttons, the method is used in the MainWindow class.

#ifndef GENERATEBUTTONS_H
#define GENERATEBUTTONS_H

#include <QVBoxLayout>

class GenerateButtons
{
public:
    GenerateButtons();
    static void addButtons(int i , QVBoxLayout V );
};

#endif // GENERATEBUTTONS_H


#include "generatebuttons.h"
#include <QPushButton>

GenerateButtons::GenerateButtons()
{

}

void GenerateButtons::addButtons(int i, QVBoxLayout V )
{
    for(int j = 0; j < i; j++)
    {
        QPushButton *Button = new QPushButton();
        Button->setObjectName("Button" + QString::number(j));       
        V.addWidget(Button);
    }
}

main window class:

#include "generatebuttons.h"
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
   GenerateButtons::addButtons(10 , Verticallayout );
}

what I want to do is: on each button click I can generate a debug message or Label in the same window.
but I found difficulties because the buttons ore not created statically and can't create a slot for each button as we do with the QT designer, can someone have a proposition or a solution for this.
thanks

jsulm

@Hamza-B said in How to use dynamically-created buttons:

but I found difficulties because the buttons ore not created statically

What difficulties exactly?

QPushButton *button = new QPushButton(this);
connect(button,...);

You also can use same slot for all these buttons or use a lambda function as slot.

Lurkki

You can connect them in the function where you create them:

    for(int j = 0; j < i; j++)
    {
        QPushButton *Button = new QPushButton();

        connect(Button, &QPushButton::clicked, [=]() {
            qDebug() << "button" << j << "clicked";
        });

        Button->setObjectName("Button" + QString::number(j));       
        V.addWidget(Button);
    }

Hamza.B

@Lurkki said in How to use dynamically-created buttons:

connect

I couldn't use "connect" inside the function, the class did not recognize it.
is there some include that must be added to the class to use "connect"?

J.Hilk

@Hamza-B
connect is a static function of QObject. If your class is not derived from QObject, you can still use the explicitly static call

e.g.

QObject::connect(Button, &QPushButton::clicked, [=]() {
            qDebug() << "button" << j << "clicked";
        });