GenericTreeModel with PyGObject Introspection Gtk+ 3?

3

votes

I'm trying to write my own Gtk+3-TreeModel based on GenericTreeModel in Python3, but I this error:

AttributeError: 'gi.repository.Gtk' object has no attribute 'GenericTreeModel'

Has GenericTreeModel been renamed?

Thanks in advance.

pythonpython-3.xgtk3pygobjecttreemodel

4

votes

PyGObject recently gained GenericTreeModel support through pygtkcompat.

This is new in 3.7.90 with a fix in 3.7.91

So now you should be able to migrate GenericTreeModels by using the compatibility module, at least as a start.

3

votes

So I’ve been coping with this for a while. Here are my results:

As Havok already said: the GenericTreeModel does not exist anymore and one has to use the normal gtk.TreeModel interface and override the appropriate methods (naming them do_…):
```
class TreeModel(GObject.GObject, gtk.TreeModel):
   def do_get_iter(self, iter, path):
       …
       iter.user_data = whatever()
       return True
```
Inheriting from ListStore or TreeStore does not work when using custom iters etc.
The repository with call information is broken (see launchpad:gtk3#1024492) so that the do_get_iter method is called without the iter argument, so you cannot set custom data on it. To fix it change the direction for the iter argument in /usr/share/gir-1.0/Gtk-3.0.gir from "out" to "in" and run:
```
g-ir-compiler --output=/usr/lib/girepository-1.0/Gtk-3.0.typelib /usr/share/gir-1.0/Gtk-3.0.gir
```

1

votes

I could not find any reference to GenericTreeModel in PyGObject nor in Gtk, but I think what you are looking for is just TreeModel:

http://developer.gnome.org/gtk3/stable/GtkTreeModel.html

TreeModel is the interface, is implemented by ListStore, TreeModelFilter, TreeModelSort and TreeStore.

>>> from gi.repository import Gtk
>>> dir(Gtk.TreeModel)
['__bool__', '__class__', '__delattr__', '__delitem__', '__dict__', '__doc__',
 '__format__', '__gdoc__', '__getattribute__', '__getitem__', '__gtype__', '__hash__', 
 '__info__', '__init__', '__iter__', '__len__', '__module__', '__new__', '__nonzero__',
 '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__setitem__', '__sizeof__', 
 '__str__', '__subclasshook__', '__weakref__', '_convert_row', '_convert_value', 
 '_getiter', 'filter_new', 'foreach', 'get', 'get_column_type', 'get_flags', 'get_iter',
 'get_iter_first', 'get_iter_from_string', 'get_n_columns', 'get_path', 
 'get_string_from_iter', 'get_value', 'iter_children', 'iter_has_child', 
 'iter_n_children', 'iter_next', 'iter_nth_child', 'iter_parent', 'iter_previous', 
 'ref_node', 'row_changed', 'row_deleted', 'row_has_child_toggled', 'row_inserted', 
 'set_row', 'sort_new_with_model', 'unref_node']

EDIT:

Found what you are looking for in old PyGtk API, sadly, this was a PyGtk-only creation. With the introspection stuff you just get only what Gtk directly provides, so you will have to deal with TreeModel directly.

Hope it helps.

GenericTreeModel with PyGObject Introspection Gtk+ 3?

3 Answers