CODEWITHSUNDEEP
pythonpython-3.xgtkgtk3gnome
TellMeWhy
TellMeWhy

Reputation: 315

Set spacing of Gtk3 HeaderBar in Python?

According to the official documentation (https://developer.gnome.org/gtk3/stable/GtkHeaderBar.html), GtkHeaderBar has a spacing property.

To change the subtitle and title properties in python you would use

headerbar.set_title()
headerbar.set_subtitle()

So it should therefore follow that spacing() would also follow the same rules, however I am informed of the following error

AttributeError: 'HeaderBar' object has no attribute 'set_spacing'

What is the reason for this? I have not been able to find any specific examples, the documentation is the only place that covers its use, and according to it spacing is clearly a property of GtkHeaderBar

Appreciate any help you can give here

Upvotes: 0

Views: 167

Answers (2)

ptomato
ptomato

Reputation: 57854

To set GObject properties directly, each object has a props attribute:

headerbar.props.spacing = 5
headerbar.props.subtitle = 'Habits of the Algorithmic Mind'

I believe this is so that when you mistype a property name it won't silently fail (e.g. headerbar.spaing = 5). Although other language bindings for GObject, such as JS and Ruby, treat GObject properties the same as attributes of the object.

Upvotes: 4

jcoppens
jcoppens

Reputation: 5440

Properties are not the same as attributes. You can set the property with:

your_bar.set_property("spacing", 5)

Or, you can define the spacing on instantiating the object:

your_bar = Gtk.HeaderBar(spacing = 5)

(I prefer the latter - you can set a bunch of properties that way, in one single statement)

Upvotes: 1

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