The values of the two control widgets are syncronized, meaning
that both emit signals when the local value changes, regardless
which one is visible and is actually used by the user.
This is not ideal because it leads to two dbus calls
per local change. To alleviate this, only consider
changes from the widget that is visible.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3086>
The logic could enter an infinite loop because it tried to
propagate local changes to g-s-d that were caused by signals sent
by g-s-d. For example:
1. slider is set to 50
2. Set(50) dbus call is sent
3. slider is set to 51
4. Set(51) dbus call is sent
5. PropertiesChanged arrives due to Set(50)
6. this._sliderItem.value is set to 50
7. notify::value is emitted from this._sliderItem
8. Set(50) dbus call is sent
9. PropertiesChanged arrives due to Set(51)
10. this._sliderItem.value is set to 51
11. notify::value is emitted from this._sliderItem
12. Set(51) dbus call is sent
To alleviate this issue, block signal handlers when the local state is
changed due to a remote event.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/7111
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3086>
The custom setter used by the slider item isn't emitting change
notifications, so the property binding that uses it as source
never propagates the new value.
Fix this by emitting proper change notifications.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2856>
Settings no longer exposes a slider for the keyboard brightness,
leaving keyboard shortcuts as the only way of adjusting it.
This is good enough in most cases, because devices with keyboard
backlight usually include corresponding keys on their keyboard.
However for devices without those keys, it would be good for the
settings to be exposed somewhere again. Quick settings seems like
a more appropriate place than "proper" Settings, since it gives
quick access that doesn't require a major focus change.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/6765
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2820>
