QProgressDialog without close button [duplicate]

Question

Is it possible to remove the close button (see screenshot) of a QProgressDialog? I couldn't find anything useful in the docs/Google.

I use a modal QProgressDialog to show infinite process and block the GUI until a lengthy operation has completed. Because the GUI should be blocked, I don't want the user to be able to close the dialog.

Answer 1

You can hide close button of every window by clearing an appropriate flag:

With Qt 5.0

QProgressDialog dlg;
dlg.setWindowFlags(dlg.windowFlags() & ~Qt::WindowCloseButtonHint);

Qt::WindowCloseButtonHint 0x08000000 Adds a close button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.

With earlier versions

    QProgressDialog dlg;
    dlg.setWindowFlags(Qt::Window | Qt::WindowTitleHint | Qt::CustomizeWindowHint);

where

• Qt::Window stands for window
• Qt::WindowTitleHint stands for displaying title on the top of the window
• Qt::CustomizeWindowHint stands for not displaying buttons