Highlight all text in QTextBrowser when gaining focus

[Boron]

Hello,

I want to highlight all text in QTextBrowser when it gains focus. I couldn't find a suitable signal that tells me that the TextBrowser widget just gained focus.

So I thought about reimplementing the focusInEvent, which seems to be the correct way. I derived a class MyTextBrowser from QTextBrowser.
But as I am using the Designer for layouting my windows I don't know how to "replace" the used QTextBrowser object with a MyTextbrowser object.

Or is there any other way to highlight all text in QTextBrowser when it gains focus?

[jpn]

I want to highlight all text in QTextBrowser when it gains focus. I couldn't find a suitable signal that tells me that the TextBrowser widget just gained focus.

So I thought about reimplementing the focusInEvent, which seems to be the correct way. I derived a class MyTextBrowser from QTextBrowser.

Correct, it's not a signal but an event.

But as I am using the Designer for layouting my windows I don't know how to "replace" the used QTextBrowser object with a MyTextbrowser object.

See Promoting Widgets.