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gesture-tracker: Add meta_gesture_tracker_get_n_current_touches()
Due to the way the MetaGestureTracker processes every touch event, this will tell as closely to Clutter as possible the current number of touches happening on the stage. Even though, this is subject to windowing behavior, on X11, rejected touches will be soon followed by a XI_TouchEnd event, so the compositor will stop seeing touch sequences that are still operating on clients. On wayland, touch sequences are processed by the compositor during all their lifetime, so these will stay on the MetaGestureTracker with META_SEQUENCE_PENDING_END state, yet still tracked. https://bugzilla.gnome.org/show_bug.cgi?id=733631
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@ -72,5 +72,6 @@ MetaSequenceState meta_gesture_tracker_get_sequence_state (MetaGestureTracker
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ClutterEventSequence *sequence);
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gboolean meta_gesture_tracker_consumes_event (MetaGestureTracker *tracker,
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const ClutterEvent *event);
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gint meta_gesture_tracker_get_n_current_touches (MetaGestureTracker *tracker);
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#endif /* META_GESTURE_TRACKER_PRIVATE_H */
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@ -565,3 +565,14 @@ meta_gesture_tracker_consumes_event (MetaGestureTracker *tracker,
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return (event->type != CLUTTER_TOUCH_END &&
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(state == META_SEQUENCE_REJECTED || state == META_SEQUENCE_PENDING_END));
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}
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gint
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meta_gesture_tracker_get_n_current_touches (MetaGestureTracker *tracker)
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{
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MetaGestureTrackerPrivate *priv;
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g_return_val_if_fail (META_IS_GESTURE_TRACKER (tracker), 0);
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priv = meta_gesture_tracker_get_instance_private (tracker);
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return g_hash_table_size (priv->sequences);
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}
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