Introduce a pan backend for touchscreen gestures #2096
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The grab should always be on the actor that was last pushed modal. Clutter keeps a stack of grabs internally so we just can grab every actor.
Add information about whether a gesture will be handled. This might be used to determine whether events are supposed to be consumed. Add information about the origin of a gesture. This might be used to determine whether a gesture should be handled (e.g. only allow swipe from screen edge). Add common GestureBackend interface that all backends have to implement. Add a on_gesture_handled signal to the GestureTracker which runs if and only if true was returned in on_gesture_detected. Before it is emitted prepare_gesture_handling will be called on the backend. This will be needed for the upcoming PanBackend to avoid conflicts in event consuming. Add a utility get_action to the GestureSettings that gets the corresponding action for a gesture. This allows to remove some duplicated code.
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This should be ready for testing/review now |
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This allows exact finger tracking for touchscreen devices. Fixes #1272
Fixes #1801
In the long term with some coming mutter changes it will handle all gestures (touchpad as well) in order to remove the need of touchegg which currently only works because of xwayland.
This will also allow us to have much more precise gestures: e.g. swipe up from the bottom to reveal the dock one to one will be trivial to implement (PR incoming). It can also be used to do swipe in from corners to use hotcorners on touchscreen (another PR incoming :) ).
TODO:
meta_wayland_pointer_set_focus: assertion 'meta_cursor_tracker_get_pointer_visible (cursor_tracker) || clutter_seat_is_unfocus_inhibited (clutter_seat) || surface == NULL' failedFor easier review see the individual commits and also their message for details about some changes.
Rebase merge