qt4 - How can I hide/delete the "?" help button on the "title bar" of a Qt Dialog?

Question

I am using Qt Dialogs in one of my application. I need to hide/delete the help button. But i am not able to locate where exactly I get the handle to his help button. Not sure if its a particular flag on the Qt window.

Answer 1

By default the Qt::WindowContextHelpButtonHint flag is added to dialogs. You can control this with the WindowFlags parameter to the dialog constructor.

For instance you can specify only the TitleHint and SystemMenu flags by doing:

QDialog *d = new QDialog(0, Qt::WindowSystemMenuHint | Qt::WindowTitleHint);
d->exec();

If you add the Qt::WindowContextHelpButtonHint flag you will get the help button back.

In PyQt you can do:

from PyQt4 import QtGui, QtCore
app = QtGui.QApplication([])
d = QtGui.QDialog(None, QtCore.Qt.WindowSystemMenuHint | QtCore.Qt.WindowTitleHint)
d.exec_()

More details on window flags can be found on the WindowType enum in the Qt documentation.