Implementing QComboBox in a QTreeView item

  • Hi,
    I am new to QT and currently working on a python GUI application using PySide.

    I have implemented a QStandardItemModel with my data and QTreeView to display it.
    I would like to display some of the model indexes as a combobox with multiple selection items. the combobox needs to be always displayed (and not just while editing).

    So, after digging up I came up with the conclusion that I will need to implement a delegate (derived from --QStyledItemDelegate)-- that will render my desired indexes to display the Combobox with my data.

    However I cannot seem to be able to actually display the combobox, and always end up with an empty column in my treeview.

    This is a simplified version of my code:

    class TreeViewDelegate(QtGui.QStyledItemDelegate):

    def init(self, parent):
    QtGui.QStyledItemDelegate.init(self, parent)

    def paint(self, painter, option, index):
    my_val =
    if my_val is not None:
    combo_opt = QtGui.QStyleOptionComboBox()
    combo_opt.rect = option.rect
    combo_opt.state = QtGui.QStyle.State_Enabled
    combo_opt.frame = True
    combo_opt.currentText = my_val, combo_opt, painter, QtGui.QTreview())

           QtGui.QStyledItemDelegate.paint(self, painter, option, index)

    def sizeHint(self, option, index):
    my_val =
    nameFont = QtGui.QFont(option.font)
    nameFM = QtGui.QFontMetrics(nameFont)
    name_width = nameFM.width(my_val)
    name_height = nameFM.height()

    return QtCore.QSize(name_width, name_height)

    What am I doing wrong here?
    Any assistance will be appreciated.


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