sub start_timer {
	# set or update timer events
	my $win = Kephra::App::Window::_ref();
	my $config = Kephra::API::settings()->{file};   

	stop_timer();
	if ($config->{open}{notify_change}) {
		$timer{file_notify} = Wx::Timer->new( $win, 2 );
		$timer{file_notify}->Start( $config->{open}{notify_change} * 1000 );
		Wx::Event::EVT_TIMER( $win, 2, sub { Kephra::File::changed_notify_check() } );
	}
	if ($config->{save}{auto_save}) {
		$timer{file_save} = Wx::Timer->new( $win, 1 );
		$timer{file_save}->Start( $config->{save}{auto_save} * 1000 );
		Wx::Event::EVT_TIMER( $win, 1, sub { Kephra::File::save_all_named() } );
	}
}