Setting background colour of qtableview

[andi456]

Hi,

I'd like to set a background colour of several lines in a qtableview instance based on an integer value stored in a custom table model. The logic being: if value on column x has a certain magnitude, then set the background to some colour. I read through a lot of posts regarding this issue, but could not figure out, how to do it. More specifically, should I use the custom table model, the paint method of the respective delegate or a (custom?) proxy model for this task or do I indeed need to program all of the above?

Thanks in advance.

Kind regards,

Andreas

[JonB]

@andi456
Probably QStyledItemDelegate is the best. But if you don't fancy that you could probably get away with doing it in data() for the background color role, either directly or through a proxy model.

[andi456]

If I went the route of the QStyledItemDelegate, I would need to somehow access the respective value from the paint method via the QModelIndex right? In order to understand the internal process. What triggers the paint method of QStyledItemDelegate?

[JonB]

@andi456
That's fine, QStyledItemDelegate seems best.

What triggers the paint method of QStyledItemDelegate?

Just whenever it needs painting/re-painting!

QStyledItemDelegate receives a QModelIndex(). That contains the row. You can find the "column x" with the desired color via siblingAtColumn() in the row.