Cannot hide columns except name in QTreeview

dancaer69

I'm trying to display filesystem directories in a combobox with a treeview and I cannot hide any column except name.
I tried anything relative I found but nothing works. Here is the related code with the latest attempt before create this thread, which also doesn't work:

class SavefileDialog(QDialog, Ui_savefileDialog):
    def __init__(self,parent=None):
        QDialog.__init__(self,parent)
        self.parent=parent
        self.setupUi(self)
        dirModel = QFileSystemModel()
        dirModel.setFilter(QDir.NoDotAndDotDot | QDir.AllDirs)
        dirModel.setRootPath(QDir.homePath())
        dirModel.removeColumn(1)
        tv = QTreeView()
        self.cbSave.setView(tv)
        #tv.header().hide()
        for column in range(1, dirModel.columnCount()):
            tv.hideColumn(column)
        self.cbSave.setModel(dirModel)

With above no column is hidden. If I change 1 to 0, then the name column is hidded and all others are still visible.
Am I doing something wrong, or is a Qt bug?
I am on arch linux with Qt 5.15 version.

dancaer69

I solved this by using treeview' s setColumnHidden instead.

self.tv.setColumnHidden(column, True)

But I found another problem with treeview in combobox. The combobox collapses when I click anywhere inside. Is there any way to prevent collapse when I click on the little arrow to expand a directory?