[PyQt] Design issues; refreshing a list view

[Entity Reborn]

I am trying to write a AbstractListView where items can either be text-only,
have a checkbox, or belong to a radiobutton group.
While I have succeeded in this, I'm having refresh issues with my
implementation, in regard to the radiobutton groups and the way that the
'exclusivity' is implemented. Basically, when one selects one of the
radiobuttons, and another button was selected previously, the new one IS
selected, yet the old one -appears- to still be selected, until one forces a
refresh via resizing the window. While the socket dataChanged() is called
for the item that was clicked, I can't easily see a way to do the same for
items that were programmatically unchecked. Full code is attached. Please
excuse the lame implementation for differentiating text items from checkbox
items and radiobutton items (namely, "x" or "o" to define checkboxes or
radiobuttons, in the text document provided).
Ideally, I'd like to find a way to generate QModelIndexes for the affected
items, and refresh each one as needed, but if there is a shotgun approach of
forcing a full refresh, that can be an option as well.

Based largely off of the SimpleTreeModel example.

-- 
~EntityReborn
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xGetting Started				xHow to familiarize yourself with Qt Designer
    oLaunching Designer			oRunning the Qt Designer application
    oThe User Interface			oHow to interact with Qt Designer

xDesigning a Component			Creating a GUI for your application
    xCreating a Dialog			How to create a dialog
    oComposing the Dialog		xPutting widgets into the dialog example
    oCreating a Layout			xArranging widgets on a form
    Signal and Slot Connections		Making widget communicate with each other

Using a Component in Your Application	Generating code from forms
    The Direct Approach			Using a form without any adjustments
    The Single Inheritance Approach	Subclassing a form's base class
    The Multiple Inheritance Approach	Subclassing the form itself
    Automatic Connections		Connecting widgets using a naming scheme
        A Dialog Without Auto-Connect	How to connect widgets without a naming scheme
        A Dialog With Auto-Connect	Using automatic connections

Form Editing Mode			How to edit a form in Qt Designer
    Managing Forms			Loading and saving forms
    Editing a Form			Basic editing techniques
    The Property Editor			Changing widget properties
    The Object Inspector		Examining the hierarchy of objects on a form
    Layouts				Objects that arrange widgets on a form
        Applying and Breaking Layouts	Managing widgets in layouts 
        Horizontal and Vertical Layouts	Standard row and column layouts
        The Grid Layout			Arranging widgets in a matrix
    Previewing Forms			Checking that the design works

Using Containers			How to group widgets together
    General Features			Common container features
    Frames				QFrame
    Group Boxes				QGroupBox
    Stacked Widgets			QStackedWidget
    Tab Widgets				QTabWidget
    Toolbox Widgets			QToolBox

Connection Editing Mode			Connecting widgets together with signals and slots
    Connecting Objects			Making connections in Qt Designer
    Editing Connections			Changing existing connections
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