[ACCEPTED]-adding child in QMainWindow-qmainwindow

Accepted answer
Score: 16

As e-zinc suggested you have to use layout. Say 5 you want to insert two widgets into the 4 mainwindow.

QHBoxLayout *layout = new QHBoxLayout;

QPushButton *button1 = new QPushButton("button1");
QPushButton *button2 = new QPushButton("button2");

layout->addWidget(button1);
layout->addWidget(button2);

setCentralWidget(new QWidget);
centralWidget()->setLayout(layout);

This will layout widgets horizontally 3 and you will get this result: QHBoxLayoutExample

And if you 2 want to layout them vertically use QVBoxLayout

I would 1 strongly suggest reading the documentation. Layout Management in Qt

Score: 5

Use QMainWindow::setCentralWidget(QWidget *) to add your own control.

0

Score: 0

////////if you want to create from main.cpp////////

    #if 0
int main(int argc, char* argv[])
{
    QApplication app(argc, argv);

    QMainWindow* MainWindow = new QMainWindow(NULL);
    QWidget*     cwidget    = new QWidget(MainWindow);
    QPushButton* button1    = new QPushButton(cwidget);
    QPushButton* button2    = new QPushButton(cwidget);

    button1->setText("Button1");
    button2->setText("Button2");

    button1->move(10, 100);
    button2->move(10, 200);

    MainWindow->setCentralWidget(cwidget);
    MainWindow->resize(400, 300);
    MainWindow->show();

    return app.exec();
}

#else
int main(int argc, char* argv[])
{
    QApplication app(argc, argv);

    QMainWindow* MainWindow = new QMainWindow(NULL);
    QWidget*     cwidget    = new QWidget(MainWindow);
    QHBoxLayout* layout     = new QHBoxLayout; //horizontal layout
    QPushButton* button1    = new QPushButton("button1");
    QPushButton* button2    = new QPushButton("button2");

    layout->addWidget(button1);
    layout->addWidget(button2);

    MainWindow->setCentralWidget(cwidget);
    MainWindow->centralWidget()->setLayout(layout); //centralWidget() is getcentralWidget()
    MainWindow->resize(400, 300);

    MainWindow->show();

    return app.exec();
}
#endif

0

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