如何修复 Gtk.ListBox for GTK/LibHandy 片段中的大丑陋开关按钮

Question

使用 python、gtk 和 libhandy 创建了一个简单的列表框。不幸的是，我不知道为什么开关盒这么大(而且丑陋(。它们看起来一点也不自然。

gi.require_version('Handy', '0.0')
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Handy

class MyWindow(Gtk.Window):
def __init__(self):
# https://lazka.github.io/pgi-docs/Gtk-3.0/classes/Window.html
Gtk.Window.__init__(self)
self.set_title("Switches Example")
self.connect("destroy", Gtk.main_quit)
self.set_size_request(350, 350)
# Create List Box
# https://lazka.github.io/pgi-docs/Gtk-3.0/classes/ListBox.html 
box = Gtk.ListBox()
box.set_selection_mode(Gtk.SelectionMode.NONE)
# use the libhandy function to add separators to listbox rows
# https://lazka.github.io/pgi-docs/#Handy-0.0/functions.html#Handy.list_box_separator_header
box.set_header_func(Handy.list_box_separator_header)
# Add some rows
box.add(self.addrow("London"))
box.add(self.addrow("Berlin"))
box.add(self.addrow("Prague"))
# Add List box to main window
self.add(box)

def addrow(self, title):
# https://lazka.github.io/pgi-docs/#Handy-0.0/classes/ActionRow.html
row = Handy.ActionRow()
row.set_title(title)
# Add action to row
row.add_action(Gtk.Switch.new())
return row
# https://lazka.github.io/pgi-docs/#Handy-0.0/functions.html#Handy.init 
Handy.init()
window = MyWindow()
window.show_all()
Gtk.main()

目前，开关按钮看起来像这样(又大又丑(。 当前

这是预期的外观 预期

如何使切换按钮看起来像预期的那样？

Answer 1

需要将Gtk.Switch的valign属性设置为Gtk.Align.CENTER，默认为Gtk.Align.FILL

def addrow(self, title):
# https://lazka.github.io/pgi-docs/#Handy-0.0/classes/ActionRow.html
row = Handy.ActionRow()
row.set_title(title)
# Add action to row
switch = Gtk.Switch()
switch.set_valign(Gtk.Align.CENTER)
row.add_action(switch)
return row