Dirty QDialog

[SElsner]

Hey,

how do I determine whether a Dialog is dirty (i.e. the values of the widgets were changed)? I could install an event filter but that fires far too often and i am concerned about performance...

Thanks

Sebastian

[high_flyer]

all widgets that manage some sort of data, such as text etc, emit signals when their values are changed.

[SElsner]

Ok, but how would you do that in an application with a lot of widgets? I am thinking of undo/redo. Would you need to connect EVERY widget to a method handling the case when something changed?! Or is there a shorcut?

[high_flyer]

you didn't supply almost any details about your code, or the particulars of what you are doing.
But in a very general way - yes, you have to connect each signal to a slot, if you wan to handle that signal.
You can have one slot connected to any arbitrary compatible signals though.
So you could have one slot in your dialog, that sets a "dirty" flag when ever any of the widgets in it changed.

[SElsner]

Thank you very much. This is not really about code, it's more about understanding and best practice in Qt.