How to get width of a column in Qtreeview if I have column Name

[Qt Enthusiast]

I have columName , How to get width of a column in Qtreeview ?

For example if the Qtreeview has

A B C D as columns

I have B how to get the width of B

[mrjj]

Hi
What about
int width = ui->treeView->columnWidth( index );

[Qt Enthusiast]

how to get index from columnName

[mrjj]

Hi
Normally you would get that from a ModelIndex when you click something etc.
I don't think there is search by name.
You can loop them like

QStringList headers;
    for (int i = 0; i < ui->treeView->model()->columnCount(); i++) {
        headers.append(ui->treeView->model()->headerData(i, Qt::Horizontal).toString());
    }