How do I use the TreeModelFilter to process tree/store data automatically?
The TreeModelFilter is not just useful for filtering data from a model; it can be used to synthesize completely new columns that were never in the original model. The example code below generates a filtered version of a ListStore, with 2 string columns, from an original model with only one column of Python objects. This filtered model can then be used in TreeViews and ComboBoxes in the usual fashion. This is a powerful way to abstract your application model (your business objects) from the view (the way they are displayed.) For more info on TreeModelFilter see the PyGTK tutorial (FAQ 1.9.
The TreeModelFilter is not just useful for filtering data from a model; it can be used to synthesize completely new columns that were never in the original model. The example code below generates a filtered version of a ListStore, with 2 string columns, from an original model with only one column of Python objects. This filtered model can then be used in TreeViews and ComboBoxes in the usual fashion.
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