User authentication / User restrictions for Qt-Gui

Sven_R

Hallo,
I’m new on qt and in the forum.
At the moment I’m developing a HMI for a machine. For the HMI it’s necessary to have different users and user-levels. Another requirement is to have configurable restrictions for each widget(buttons, tables, … ). For each user-level I like to configure which widget is enabled or disabled.
My first idea was to use the object name (Qobject::objectName) of the widgets. In my approach there should be a list where the options (enable/disable) for each widget and each user-level is stored. On startup and when the user changed I look into the list and search the objectName of each gui-widget. Than I set the enable-property of each gui-widget.
At the moment I collect some ideas and make some drafts.
My Question:
What is the usual approach to handle users, user-level and user-accounts?
What would you recommend how I should handle the enable/disable property for the widgets?
Is there is a built-in mechanism in qt?
Do you know some good examples?

Thanks for helping.

SGaist

Hi and welcome to devnet,

No there's no builtin mechanism for that.

As for users, user-level and accounts, that's usually done using a database where you have all that information.

As for handling of the widgets state you can e.g. use a custom event that you generate when the user changes and it's the responsibility of each widget to know what to enable disable based on the level of the new user.

Sven_R

@SGaist
Thanks for you tips.
I will do some work on my user-authentication. If I find some time i will post a short overview of my approch, if anyone is interested.

Best regards

JulienMaille

I'm definitely interested in what you come up with!

kshegunov

Me as well, especially the implications of disabling/hiding some widgets for some users and how you work around it.