MainWindow.py

# -*- coding: utf-8 -*-
"""Python - GTK - PyGObject."""

import gi

gi.require_version(namespace='Gtk', version='4.0')
gi.require_version(namespace='Adw', version='1')

from gi.repository import Adw, Gio, Gtk

Adw.init()


class ExampleWindow(Adw.ApplicationWindow):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)

        self.set_title(title='Python - PyGObject - GTK')

        self.set_default_size(width=int(1366 / 2), height=int(768 / 2))
        self.set_size_request(width=int(1366 / 3), height=int(768 / 3))

        adw_toast_overlay = Adw.ToastOverlay.new()
        self.set_content(content=adw_toast_overlay)

        adw_toolbar_view = Adw.ToolbarView.new()
        adw_toast_overlay.set_child(child=adw_toolbar_view)

        adw_header_bar = Adw.HeaderBar.new()
        adw_toolbar_view.add_top_bar(widget=adw_header_bar)

        menu_button_model = Gio.Menu()
        menu_button_model.append(
            label='Preferences',
            detailed_action='app.preferences',
        )

        menu_button = Gtk.MenuButton.new()
        menu_button.set_icon_name(icon_name='open-menu-symbolic')
        menu_button.set_menu_model(menu_model=menu_button_model)
        adw_header_bar.pack_end(child=menu_button)

        vbox = Gtk.Box.new(orientation=Gtk.Orientation.VERTICAL, spacing=12)
        vbox.set_margin_top(margin=12)
        vbox.set_margin_end(margin=12)
        vbox.set_margin_bottom(margin=12)
        vbox.set_margin_start(margin=12)
        adw_toolbar_view.set_content(content=vbox)

        gio_menu = Gio.Menu.new()

        gio_menu_item_01 = Gio.MenuItem.new()
        gio_menu_item_01.set_label(label='Item 01')
        gio_menu_item_01.set_detailed_action(
            detailed_action='app.split-button-menu-item-activate',
        )
        gio_menu.append_item(gio_menu_item_01)

        gio_menu_submenu = Gio.Menu.new()

        gio_menu_item_submenu = Gio.MenuItem.new_submenu(
            label='Submenu',
            submenu=gio_menu_submenu,
        )
        gio_menu.append_item(gio_menu_item_submenu)

        gio_menu_item_02 = Gio.MenuItem.new()
        gio_menu_item_02.set_label(label='Item 02')
        gio_menu_item_02.set_detailed_action(
            detailed_action='app.split-button-menu-item-activate',
        )
        gio_menu_submenu.append_item(gio_menu_item_02)

        gio_menu_section = Gio.Menu.new()

        gio_menu_item_section = Gio.MenuItem.new_section(
            label='Editar',
            section=gio_menu_section,
        )
        gio_menu.append_item(gio_menu_item_section)

        # Another way to create items.
        gio_menu_section.append(
            label='item 03',
            detailed_action='app.split-button-menu-item-activate',
        )
        gio_menu_section.append(
            label='item 04',
            detailed_action='app.split-button-menu-item-activate',
        )

        popover_menu = Gtk.PopoverMenu.new_from_model(gio_menu)

        split_button = Adw.SplitButton.new()
        split_button.set_popover(popover=popover_menu)
        split_button.set_halign(align=Gtk.Align.CENTER)
        split_button.connect('clicked', self.on_split_button_clicked)
        vbox.prepend(child=split_button)

        button_content = Adw.ButtonContent.new()
        button_content.set_icon_name(icon_name='document-open-symbolic')
        button_content.set_label(label='Open')
        button_content.set_use_underline(use_underline=True)
        split_button.set_child(button_content)

    def on_split_button_clicked(self, split_button):
        print('Adw.SplitButton, Button pressed')


class ExampleApplication(Adw.Application):
    def __init__(self):
        super().__init__(
            application_id='br.com.justcode.PyGObject',
            flags=Gio.ApplicationFlags.FLAGS_NONE,
        )

        self.create_action('quit', self.exit_app, ['<primary>q'])
        self.create_action('preferences', self.on_preferences_action)
        # Registrando método que será executádo pelos itens do menu do Adw.SplitButton.
        self.create_action(
            'split-button-menu-item-activate',
            self.on_gio_menu_item_activate,
        )

    def do_activate(self):
        win = self.props.active_window
        if not win:
            win = ExampleWindow(application=self)
        win.present()

    def do_startup(self):
        Gtk.Application.do_startup(self)

    def do_shutdown(self):
        Gtk.Application.do_shutdown(self)

    def on_preferences_action(self, action, param):
        print('Action `app.preferences` was active.')

    def on_gio_menu_item_activate(self, simple_action, variant_type):
        print('Gio.SimpleAction, item do menu pressionado.')

    def exit_app(self, action, param):
        self.quit()

    def create_action(self, name, callback, shortcuts=None):
        action = Gio.SimpleAction.new(name=name, parameter_type=None)
        action.connect('activate', callback)
        self.add_action(action=action)
        if shortcuts:
            self.set_accels_for_action(
                detailed_action_name=f'app.{name}',
                accels=shortcuts,
            )


if __name__ == '__main__':
    import sys

    app = ExampleApplication()
    app.run(sys.argv)