Removing default application menu on Linux & Windows

[ikus060]

Hello, The application Design I'm working on does required a top application menu ad provided by default. I've found some discussion about how to remove it that partially worked, but I will have a nasty gray area at the top. Probably some padding added by default ?

Here the source code:

"""
My first application
"""
import toga
from toga.app import AppStartupMethod, OnExitHandler
from toga.style import Pack
from toga.style.pack import COLUMN, ROW
import toga.platform
from toga.widgets.button import OnPressHandler

IS_LINUX = toga.platform.get_current_platform() == 'linux'
IS_WINDOWS = toga.platform.get_current_platform() == 'windows'

class Button(toga.Button):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        if IS_LINUX:
            from gi.repository import Gtk
            self._impl.native.set_relief(Gtk.ReliefStyle.NONE)
            self._impl.apply_css('test1', {'border-radius':'0', 'border':'none'})
            self._impl.apply_css('test2', {'opacity':'0.8'}, selector='.toga:hover')

class Minarca(toga.App):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        # Disable menu creation for Linux and Windows
        if IS_LINUX or IS_WINDOWS:
            self._impl.create_menus = self._create_menus
            self._impl.interface.commands.on_change = None

    def _create_menus(*args, **kwargs):
        # Do nothing
        return None
    
    def startup(self):
        """
        Construct and show the Toga application.

        Usually, you would add your application to a main content box.
        We then create a main window (with a name matching the app), and
        show the main window.
        """
        white = toga.colors.WHITE
        dark = toga.colors.color('#0E2933')
        btn = toga.colors.color('#009FB9')

        main_box = toga.Box(style=Pack(direction=COLUMN), children=[
            toga.Box(style=Pack(direction=COLUMN, background_color=dark), children=[
                 toga.Label(text='MINARCA', style=Pack(text_align='left', color=white, padding=20)),
            ]),
            toga.Box(style=Pack(direction=COLUMN, padding=30, background_color=white), children=[
                toga.Label(id='lbl', text='Coucou', style=Pack(text_align='left', padding=20)),
                toga.Box(style=Pack(direction=ROW), children=[
                    Button(text='I Love Python', on_press=self.click ,style=Pack(background_color=btn, padding=20)),
                ])
            ])
        ])

        self.main_window = toga.MainWindow(title=self.formal_name)
        self.main_window.content = main_box
        self.main_window.show()
    
    def click(self, event=None):
        lbl = self.main_window.widgets['lbl']
        lbl.text = 'Foo'



def main():
    return Minarca(formal_name='Minarca', app_id='org.minarca')

[freakboy3742]

I believe the extra grey bar is a bug in the GTK implementation; it's adding a toolbar to the window even though there are no toolbar buttons, and the empty toolbar is a couple of pixels tall.

The general feature you're looking for is #1870; I'm in the process of reworking this logic in #2244, which will add an official API for a "minimalist" main window without a menubar.

In the meantime, you might be able to work around the bug on GTK by removing the toolbar from the layout - I haven't tried this, but something like main_window._impl.layout.remove(main_window._impl.native_toolbar) might work.

[ikus060]

main_window._impl.layout.remove(main_window._impl.native_toolbar)

This is working indeed. That will do the trick for now and I will take a look at #2244