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python gtk pygobject gtk4

Answers (1)

March 2, 2026 Score: 2 Rep: 41 Quality: Low Completeness: 60%

I got the answer from an IRC channel, the solution is to call .setvexpand(True) on both the ScrolledWindow and the ColumnView instead of the setvalign and setpropagatenatural* calls, which gives the fixed following code :

#!/usr/bin/python3
import gi
gi.requireversion("Gtk", "4.0")
from gi.repository import Gtk, Gio, GObject, GLib
class TestItem(GObject.Object):
    gtypename = "TestItem"
    name = GObject.Property(type=str)
    value = GObject.Property(type=int)
    def init(self, name: str, value: int):
        super().init()
        self.name = name
        self.value = value
def maketablecolumn(title, field):
    """
    Make a column for a field
    """
    template = b"""
            GtkListItem
""" % (field.encode('ascii'),)
    template = GLib.Bytes.new(template)
    factory = Gtk.BuilderListItemFactory.newfrombytes(None, template)
    col = Gtk.ColumnViewColumn(title = title, factory = factory,
                               resizable = True)
    return col
class Test(Gtk.ApplicationWindow):
    def init(self, kargs):
        super().init(kargs, title="Test")        
        vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=5)
        control = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=5)
        control.append(Gtk.Label(label = "Name:"))
        self.name = Gtk.Entry()
        control.append(self.name)
        control.append(Gtk.Label(label = "Value:"))
        self.value = Gtk.SpinButton.newwithrange(1, 100, 1)
        control.append(self.value)
        button = Gtk.Button.newfromiconname('list-add')
        button.connect("clicked", self.add)
        control.append(button)
        vbox.append(control)
        self.model = Gio.ListStore(itemtype = TestItem)
        view = Gtk.ColumnView()
        self.selection = Gtk.NoSelection(model = self.model)
        view.setmodel(self.selection)
        view.appendcolumn(maketablecolumn("Item name", 'name'))
        view.appendcolumn(maketablecolumn("Value", 'value'))
        view.setvexpand(True)
        scroll = Gtk.ScrolledWindow()
        scroll.setchild(view)
        scroll.setvexpand(True)
        vbox.append(scroll)
        buttons = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=5)
        clear = Gtk.Button.newfromiconname('edit-clear')
        clear.connect("clicked", self.clear)
        clear = Gtk.Button.newfromiconname('list-add')
        clear.connect("clicked", self.increase)
        buttons.append(clear)
        vbox.append(buttons)
        self.setchild(vbox)
        self.setdefaultsize(600, 400)
    def add(self, widget):
        name = self.name.getbuffer().gettext()
        value = int(self.value.getvalue())
        item = TestItem(name, value)
        self.model.insert(0, item)
    def increase(self, widget):
        for item in self.model:
            item.value += 1
    def clear(self, widget):
        self.model.removeall()
def onactivate(app):
    win = Test(application=app)
    win.present()
app = Gtk.Application(applicationid='org.kilobug.test')
app.connect('activate', onactivate)
app.run(None)