How to set background color to the GroupItem in QTreeview?

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How to set background color to the GroupItem in QTreeview?



I have created a tree view. Here i would like to set the background color of the group item.
My implementation looks like this:


if (role == Qt::BackgroundRole && isCategory(index))
QBrush lightGrayColor(Qt::lightGray);
return lightGrayColor;



But the background of the icon is not colored.
enter image description here



If i use QTreeview:: setAlternatingColors(true) it is coloring properly. But I want to achieve in the model. Should i use QitemDelegate::paint method or can be achieved in the model itself. Thank you





The model contains the data. The view is the representation.
– scopchanov
Aug 8 at 11:25






I meant the model class has a method data where i can set the color. Should i modify here to set the color or just use alternatingcolor call. The problem is here i want just to highlight the group items and view does not have information about it which is a groupitem
– user8183713
Aug 8 at 11:31





I am sorry, I can't follow. What is a method data?
– scopchanov
Aug 8 at 11:34





From QAbstractItemModel::data(const QModelIndex& index, int role /*= Qt::DisplayRole*/) . Here you can use the index parameter and paint the background.
– user8183713
Aug 8 at 11:44





@vinaycool I do not see that that is handled by the model, or if you want it to be handled you will have to create your own QTreeView.
– eyllanesc
Aug 8 at 13:30









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