[Python,Gtk4] Gtk.Entryの使用について②　Gtk.Entryへのパルス、アイコンの追加

import gi
gi.require_version('Gtk', '4.0')
from gi.repository import Gtk, GLib


APPID = 'com.github.taniyoshima.g4_fblog_entry2'


class Gtk4TestTest(Gtk.Window):

    def __init__(self, app):
        Gtk.Window.__init__(
            self, application=app, title='Gtk.Entry Test2',
            default_width=450, default_height=180)

        self.timeout_id = None

        grid = Gtk.Grid(
            margin_top=20, margin_bottom=20,
            margin_start=20, margin_end=20,
            row_spacing=20, column_spacing=20
            )

        label1 = Gtk.Label(label='①パルス', xalign=0.0)
        label2 = Gtk.Label(label='②アイコン表示', xalign=0.0)

        self.entry1 = Gtk.Entry()
        self.entry2 = Gtk.Entry(primary_icon_name='system-search-symbolic')

        button1 = Gtk.Button(label='実行')
        button1.connect('clicked', self.on_button1_clicked)
        button2 = Gtk.Button(label='切替')
        button2.connect('clicked', self.on_button2_clicked)

        grid.attach(label1, 0, 0, 1, 1)
        grid.attach(label2, 0, 1, 1, 1)

        grid.attach(self.entry1, 1, 0, 1, 1)
        grid.attach(self.entry2, 1, 1, 1, 1)

        grid.attach(button1, 2, 0, 1, 1)
        grid.attach(button2, 2, 1, 1, 1)

        self.set_child(grid)

    def on_button1_clicked(self, button):
        if button.get_label() == '実行':
            self.entry1.set_progress_pulse_step(0.2)
            self.timeout_id = GLib.timeout_add(100, self.do_pulse, None)
            button.set_label('停止')
        else:
            GLib.source_remove(self.timeout_id)
            self.timeout_id = None
            self.entry1.set_progress_pulse_step(0)
            button.set_label('実行')

    def do_pulse(self, user_data):
        self.entry1.progress_pulse()
        return True

    def on_button2_clicked(self, button):
        if self.entry2.get_icon_name(Gtk.EntryIconPosition.PRIMARY) is None:
            self.entry2.set_icon_from_icon_name(
                Gtk.EntryIconPosition.PRIMARY, 'system-search-symbolic'
            )
            self.entry2.set_icon_from_icon_name(
                Gtk.EntryIconPosition.SECONDARY, None
            )
        else:
            self.entry2.set_icon_from_icon_name(
                Gtk.EntryIconPosition.PRIMARY, None
            )
            self.entry2.set_icon_from_icon_name(
                Gtk.EntryIconPosition.SECONDARY, "system-search-symbolic"
            )


class Gtk4TestApp(Gtk.Application):

    def __init__(self):
        Gtk.Application.__init__(self, application_id=APPID)

    def do_activate(self):
        window = Gtk4TestTest(self)
        window.present()


def main():
    app = Gtk4TestApp()
    app.run()


if __name__ == '__main__':
    main()