How to programmatically add a Qt widget (QPushButton, QTextEdit, QLabel) to a Qt Designer layout?

Question

Is it possible to dynamically add widgets (PushButtons, Labels, etc.), into a Qt Designer-generated central widget layout? How can it be done?

Thank you!

Answer 1

Of course, and it's quite easy. You can have a look at the ui_mainwindow.h at the debug/release dir. I prefer setting layouts for widgets in QtDesigner to the code. It's something like this:

//set layout programatically
auto layout = new QHBoxLayout(ui->centralWidget());

//or if you have set horizontalLayout in Qt Designer
auto layout = dynamic_cast<QHBoxLayout*>(ui->centralWidget->layout());

layout->addWidget(new QLabel("hello"));