How to set background color in QComboBox?

TomNow99

Hello,

I would like something like that:
When I add next item to QComboBox, I would like to set its background color ( don't change that later ). Example:

EDIT
And I would like one more thing:
When I choose "two" I would like that the choosen background item will be in the same color ( red ). In this example the choosen item text is "one" ( I think about that "one" above beacuse there are 2 x "one" ).

mrjj

Hi
you can do it via the model

        const QModelIndex idx = colorComboBox->model()->index(x, y);
        colorComboBox->model()->setData(idx, Qt:red, Qt::BackgroundColorRole);
        colorComboBox->model()->setData(idx, Qt::blue, Qt::ForegroundRole);

TomNow99

@mrjj Thank you :)
This is exactly what I need.

But I Edit my post, so I need one more thing:

"When I choose "two" I would like that the choosen background item will be in the same color ( red ). In this example the choosen item text is "one" ( I think about that "one" above beacuse there are 2 x "one" )."

Do you know how Can I do that? Maybe slot to signal currentIndexChanged(int index)? But how can I get the color of index "index"?

EDIT I try this:

box->model()->setData(idx, QColor(255,0,0), Qt::BackgroundColorRole);
QColor color = (QColor)box->model()->data(idx,Qt::BackgroundColorRole);

But it doesn't work.

mrjj

@TomNow99

You mean the item when dropbox is not open?

Its a lineEdit, so might need some fiddling. StyleSheet maybe.

Yes to currentIndexChanged.
You can use
const QModelIndex idx = colorComboBox->model()->index(index,0); (or reverse. check doc)
to get ModelIndex and read the color with Data function

TomNow99

@mrjj

Yes

I have small problem with convert QVariant to QColor. But when I have to add parameter QVariant, QColor was fine :)

mrjj

@TomNow99
QColor color = variant.value<QColor>();.

TomNow99

@mrjj Perfect! :) Thank you!