Design a window without a caption bar - QT Designer

Question

How can I declare a window without caption when I use QT Designer?

Answer 1

if you're looking to remove window title, then the easiest way would be to set the window flags in your widget's constructor, smth like this:

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent, Qt::FramelessWindowHint),  //<-- this will remove the title bar
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
... 

or call

Qt::WindowFlags flags = Qt::CustomizeWindowHint;
setWindowFlags(flags);

more details on window types here: enum Qt::WindowType flags Qt::WindowFlags

hope this helps, regards