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Python: Update ColumnView to use Expressions #191

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Sep 20, 2024
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Python: Update ColumnView to use Expressions #191

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fe8f077
Python: Update ColumnView to use Expressions
danyeaw Jul 21, 2024
f8a535b
Add link to PyGObject docs
danyeaw Jul 21, 2024
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4 changes: 4 additions & 0 deletions CONTRIBUTING.md
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Original file line number Diff line number Diff line change
Expand Up @@ -124,3 +124,7 @@ Here is a compilation of resources to learn more about the GNOME platform.
- [Valadoc.org](https://valadoc.org)
- [Vala tutorial](https://wiki.gnome.org/Projects/Vala/Tutorial)
- [Vala examples](https://wiki.gnome.org/Projects/Vala/Examples)

### Python

- [PyGObject Docs](https://pygobject.gnome.org)
37 changes: 8 additions & 29 deletions src/Column View/main.py
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Expand Up @@ -59,7 +59,7 @@ def _on_factory_setup(_factory, list_item):

def _on_factory_bind(_factory, list_item, what):
label_widget = list_item.get_child()
book = list_item.get_item().get_item()
book = list_item.get_item()
label_widget.set_label(str(getattr(book, what)))


Expand All @@ -70,35 +70,14 @@ def _on_factory_bind(_factory, list_item, what):
col3.get_factory().connect("setup", _on_factory_setup)
col3.get_factory().connect("bind", _on_factory_bind, "year")


# Custom Sorter is required because PyGObject doesn't currently support
# Gtk.Expression: https://gitlab.gnome.org/GNOME/pygobject/-/issues/356


def model_func(_item):
pass


tree_model = Gtk.TreeListModel.new(data_model, False, True, model_func)
tree_sorter = Gtk.TreeListRowSorter.new(column_view.get_sorter())
sorter_model = Gtk.SortListModel(model=tree_model, sorter=tree_sorter)
sorter_model = Gtk.SortListModel.new(model=data_model, sorter=column_view.get_sorter())
selection = Gtk.SingleSelection.new(model=sorter_model)
column_view.set_model(model=selection)

col1_exp = Gtk.PropertyExpression.new(Book, None, "title")
col2_exp = Gtk.PropertyExpression.new(Book, None, "author")
col3_exp = Gtk.PropertyExpression.new(Book, None, "year")

def str_sorter(object_a, object_b, column) -> bool:
a = getattr(object_a, column).lower()
b = getattr(object_b, column).lower()
return (a > b) - (a < b)


def int_sorter(object_a, object_b, column) -> bool:
print(object_a)
a = getattr(object_a, column)
b = getattr(object_b, column)
return (a > b) - (a < b)


col1.set_sorter(Gtk.CustomSorter.new(str_sorter, "title"))
col2.set_sorter(Gtk.CustomSorter.new(str_sorter, "author"))
col3.set_sorter(Gtk.CustomSorter.new(int_sorter, "year"))
col1.set_sorter(Gtk.StringSorter.new(col1_exp))
col2.set_sorter(Gtk.StringSorter.new(col2_exp))
col3.set_sorter(Gtk.NumericSorter.new(col3_exp))
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