Qt to gray out and disable all actions in MainWindow

Question

Say upon launching the Qt application, is there a way to display a grayed out main window, and disable all the widgets (buttons/checkboxes/etc) - not able to click. Once the user open a file or do some init procedure, the main window becomes non-grayed out and enable all widgets. Is this something possible in Qt?

Answer 1

Yes. Just call QWidget::setEnabled(false) to disable a window/widget, and QWidget::setEnabled(true) to enable it. http://qt-project.org/doc/qt-4.8/qwidget.html#enabled-prop

By the way, the Qt documentation is very comprehensive. Just search there, and you should easily find answers to many questions.