Feature Description

I'm building my UI with blueprint-compiler and Gtk.Template, and have found that properties defined by ignis cannot be bound to Gtk widgets' properties because they are defined with different value_types:

ListView {
  factory: BuilderListItemFactory {
    template ListItem {
      child: Label {
        // lookup `name` from IgnisApplication as string, while `name` is defined as GParamBoxed
        label: bind template.item as <$IgnisApplication>.name;
      }
    }
  }
}

So I suppose that properties defined by ignis should have explicit types:

list properties' names and types

def __init__(self):
  super().__init__()
  for p in self.list_properties():
    logger.info(f"property {p.name}: {p.value_type}")

# property typed GParamBoxed
@Gobject.Property
def test_boxed(self) -> str:
  return "hello"

# property typed string
@GObject.Property(type=str)
def test_string(self) -> str:
  return "hello"

will get output:

[INFO] test-boxed, <GType PyObject (108018380832032)>
[INFO] test-string, <GType gchararray (64)>

Also, when running ignis inspector, we cannot view or edit those properties because they are typed PyObject:

See also:

1. PyGObject Properties
2. blueprint-compiler
3. Gtk.Builder
4. PyGObject Gtk.Template