how to set different background colors for rows in qtreeview

[JoeCFD]

Tried to do it as follows:
model()->setData( index, QVariant( QColor ), Qt::BackgroundRole );
No success. Any recommendation?

[JoeCFD]

https://www.qtcentre.org/threads/61716-Set-the-color-of-a-row-in-a-qtreeview
found one here. Kind of messy.

[n-2204]

check this is code to set same color in column in Qtableview ..might be helpful

QAbstractItemModel* table1 = ui.tableView_1->model();
for (int row = 0; row < table1->rowCount(); ++row) {
    for (int column : {0, 1, 2)
        table1->setData(table1->index(row, column), QBrush(QColor(240, 248, 255)), Qt::BackgroundRole);

[JoeCFD]

@n-2204 said in how to set different background colors for rows in qtreeview:

QBrush(QColor(240, 248, 255))

Thanks. I have similar code for table widget and it works. But this does not work for qtreeview somehow.

[mrjj]

Hi
But what model type is it?
If a custom model it will be handled by the data function when asked for the BackgroundRole.

[JoeCFD]

@mrjj QFileSystemModel of qt 5.15.2

[Christian Ehrlicher]

@JoeCFD said in how to set different background colors for rows in qtreeview:

QFileSystemModel of qt 5.15.2

So why should this model handle setData() with Qt::BackgroundRole? btw: setData() has a return value...

[JoeCFD]

I use alternating color feature which solves my problem while I need only two colors. But that setData does not work is weird.

[JoeCFD]

@Christian-Ehrlicher That is how it works. If qtreewidget is used, it has setData. But qtreeview does not have setData and its properties are manipulated with model.

[VRonin]

@JoeCFD said in how to set different background colors for rows in qtreeview:

QFileSystemModel

This model only handles Qt::EditRole.

You can use RoleMaskProxyModel from this library to support other roles. See this example

[JoeCFD]

@VRonin Excellent! Thanks.