QTableWidget different font in one cell

[AlexSmart]

Is it possible to put text in QTableWidget in different font (different background)?

[jsulm]

@AlexSmart https://doc.qt.io/qt-5/qtablewidget.html#itemAt
https://doc.qt.io/qt-5/qtablewidgetitem.html#setFont

[AlexSmart]

@jsulm works fine with whole cell, but is it possible to chamge font within cell?

[jsulm]

@AlexSmart Can you please explain what you mean?

[AlexSmart]

@jsulm Something like that

[JonB]

@AlexSmart
Since a cell only displays a single text. (You could try putting in rich text/HTML, but I don't think it supports that?). Sounds to me like you would need a QStyledItemDelegate to achieve the changed font. Or if you are lazy, and @VRonin doesn't see this, setCellWidget(QLabel*) and do your formatting in the label, which does accept HTML.

[AlexSmart]

@JonB said in QTableWidget different font in one cell:

Or if you are lazy, and @VRonin doesn't see this, setCellWidget(QLabel*)

I got the idea but this side of coding is new to me, what is the main downside of this approach?

[JonB]

@AlexSmart

• We have a regular expert contributor named @VRonin (though he doesn't seem to have been around lately). His signature includes "wanting to banish all uses of setCellWidget(). If you use it, he shouts at you ;-)

• Widgets use relatively quite a bit of resources (think of what they have to be able to do). It's all very well when you have a handful of widgets on a page. But when you put them into tables (QTableWidget has a "convenience" method setCellWidget()) you are in danger of creating hundreds+ of them. Yet most of the time they really sit there just showing some text/bitmap/whatever, so most of the resource usage (memory, processing) is "wasted". It can for example become "slow" to show them all. Instead a QAbstractItemView-derived object (includes QTableView/QTableWidget) can use setItemDelegate() on a QStyledItemDelegate you write to set the display/editing of the items without needing the overhead of a full QWidget. If you had hundreds/thousands in a table this would be faster and use less resources. I didn't look to see whether/how easy it might be to emulate the mixed-font display supported by a QLabel in a QStyledItemDelegate: have a look/give it a go if you can, if you can't/you're lazy/you just want to see quickly what might be doable use setCellWidget() on a QLabel you create.

[AlexSmart]

@JonB thank you for explanation!
I will try setCellWidget()