What does the red circle on a tab widget mean?
Under design mode of Qt 4.8, I am trying to add a tab widget, there is a red circle on the tab widget in the Object View, It seems I can't edit the tab widget. what is that?
I printed screen to show where the red circle is, but It seems picture can't be posted here.
I think that you are referring to the following image like :-
If so, the above red circle represents that for the tabWidget you have not set the layout. If you add a layout to the tabs the red circle will disappear and the layout icon will be displayed.
bq. I printed screen to show where the red circle is, but It seems picture can’t be posted here.
You can create an account in imageshack.us or other websites and upload the image , then copy the direct link of the image provided in the website and paste in the above picture link.