Can’t get ScrolledWindow.set_propagate_natural_height() to work

[lovetox]

Hi,

I have the following simple code python3/Gtk3

from gi.repository import Gtk
from gi.repository import Gdk


a = '''asdsad
asdas
das
d
asd
as
da
sd
a
sd
ad
asd'''



class MyApp(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self)
        self.set_type_hint(Gdk.WindowTypeHint.DIALOG)
        scrolled = Gtk.ScrolledWindow()
        scrolled.set_propagate_natural_height(True)
        scrolled.set_max_content_height(800)

        box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
        box.set_vexpand(True)
        scrolled.add(box)
        self.add(scrolled)

        for x in range(20):
            box.add(create_textview())



def create_textview():
    scrolled = Gtk.ScrolledWindow()
    scrolled.set_overlay_scrolling(False)
    scrolled.set_policy(Gtk.PolicyType.AUTOMATIC,
                        Gtk.PolicyType.AUTOMATIC)

    scrolled.set_propagate_natural_height(True)
    scrolled.set_max_content_height(300)

    text = Gtk.TextView()
    text.set_vexpand(True)
    buf = text.get_buffer()
    buf.insert(buf.get_start_iter(), a)
    scrolled.add(text)
    return scrolled


win = MyApp()
win.connect("destroy", Gtk.main_quit)
win.show_all()
Gtk.main()

Everything works on the top ScrolledWindow which is the Child of the Window

My Issue is with the ScrolledWindows that have the TextViews as Child in create_textview()

It seems the TextView does not propagate its height, all the Scrolled Windows always have the minimum space possible.

What i need is a ScrolledWindow that expands until a certain size and then shows scrollbars.

I encountered this use case over and over again, and it always causes me headaches, i have it working in some places of my app, but can’t find out why it works.