python - 交替开关开/关？

Question

所以我想让我的 Python Gtk 小窗口有 2 个开关。当一个开关打开时，另一个开关关闭，反之亦然。我不太清楚如何控制这两个开关。如果有人能引导我走向正确的方向，我将不胜感激。

#!/usr/bin/python3

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

class SwitcherWindow(Gtk.Window):

def __init__(self):
    Gtk.Window.__init__(self, title="Alt Switch Demo")
    self.set_border_width(10)

    hbox = Gtk.Box(spacing=10)
    self.add(hbox)

    switch1 = Gtk.Switch()
    switch1.connect("notify::active", self.on_switch_activated)
    switch1.set_active(True)
    hbox.pack_start(switch1, True, True, 0)

    switch2 = Gtk.Switch()
    switch2.connect("notify::active", self.on_switch_activated)
    switch2.set_active(False)
    hbox.pack_start(switch2, True, True, 0)

    if switch1.get_active():
        switch2.set_active(False)
    else:
        switch2.set_active(True)

def on_switch_activated(self, switch, gparam):
    builder = Gtk.Builder()
    sw1 = builder.get_object("switch1")
    sw2 = builder.get_object("switch2")
    if switch.get_active():
        state = "on"
        sw2.set_active(False)
    else:
        state = "off"
        print("Switch was turned", state)

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

Answer 1

我会bind the properties两个开关的，在创建时反转并同步:

#!/usr/bin/python3

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

class SwitcherWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="Alt Switch Demo")
        self.set_border_width(10)

        hbox = Gtk.Box(spacing=10)
        self.add(hbox)

        switch1 = Gtk.Switch()
        switch1.set_active(True)
        hbox.pack_start(switch1, True, True, 0)

        switch2 = Gtk.Switch()
        switch2.set_active(False)
        hbox.pack_start(switch2, True, True, 0)

        switch1.bind_property("active", switch2, "active", GObject.BindingFlags.BIDIRECTIONAL | GObject.BindingFlags.SYNC_CREATE |  GObject.BindingFlags.INVERT_BOOLEAN)   


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

解决方案位于这行代码:

switch1.bind_property("active", switch2, "active", GObject.BindingFlags.BIDIRECTIONAL | GObject.BindingFlags.SYNC_CREATE |  GObject.BindingFlags.INVERT_BOOLEAN) 

给你bind switch1 和 switch2 的 "active" 属性以及 binding flags : bidirectional , sync on create和 invert boolean