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gtkgesture: Do not coalesce hold events with other touchpad gestures

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This delaying of the cancel event was made to avoid intermediate cancellation
for >=2fg hold gestures followed by pinch/swipe gestures, and it worked as
long as everything was considered to have the same sequence.

Since each pinch/swipe pointer gesture now gets its own sequence, this no
longer applies, nor works. This results in zoom/rotate/swipe gestures being
stuck since the sequence for the touchpad events changes mid-gesture.

Sticking to this pattern of giving touchpad gestures their own sequence,
these hold events cannot be assumed to coalesce with other touchpad gestures,
it is better to let it propagate altogether so that both the hold gesture
and the incoming gesture trigger coherent begin and end/cancel phases.

In the worst case, this results in "::begin, ::cancel, ::begin , ..." before
triggering a touchpad gesture, but the extra begin/cancel ought to be a safe
no-op in widgets.

Closes: https://gitlab.gnome.org/GNOME/gtk/-/issues/5003
This commit is contained in:
Carlos Garnacho 2022-08-05 11:24:58 +02:00
parent af6432aa67
commit 023924bca9
1 changed files with 2 additions and 39 deletions
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41
gtk/gtkgesture.c
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@ -162,7 +162,6 @@ struct _GtkGesturePrivate
GdkDevice *device;
GList *group_link;
guint n_points;
guint hold_timeout_id;
guint recognized : 1;
guint touchpad : 1;
};
@ -175,8 +174,6 @@ static guint signals[N_SIGNALS] = { 0 };
gdk_event_get_event_type (e) == GDK_TOUCHPAD_PINCH || \
gdk_event_get_event_type (e) == GDK_TOUCHPAD_HOLD)
#define HOLD_TIMEOUT_MS 50
GList * _gtk_gesture_get_group_link (GtkGesture *gesture);
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GtkGesture, gtk_gesture, GTK_TYPE_EVENT_CONTROLLER)
@ -225,7 +222,6 @@ gtk_gesture_finalize (GObject *object)
gtk_gesture_ungroup (gesture);
g_list_free (priv->group_link);
g_clear_handle_id (&priv->hold_timeout_id, g_source_remove);
g_hash_table_destroy (priv->points);
@ -583,22 +579,6 @@ _gtk_gesture_cancel_all (GtkGesture *gesture)
_gtk_gesture_check_empty (gesture);
}
static gboolean
gtk_gesture_hold_timeout (gpointer user_data)
{
GtkGesture *gesture;
GtkGesturePrivate *priv;
gesture = user_data;
priv = gtk_gesture_get_instance_private (gesture);
if (priv->touchpad)
_gtk_gesture_cancel_sequence (gesture, priv->last_sequence);
priv->hold_timeout_id = 0;
return G_SOURCE_REMOVE;
}
static gboolean
gesture_within_surface (GtkGesture *gesture,
GdkSurface *surface)
@ -664,10 +644,6 @@ gtk_gesture_handle_event (GtkEventController *controller,
(event_type == GDK_TOUCHPAD_PINCH && phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN) ||
(event_type == GDK_TOUCHPAD_HOLD && phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN))
{
if ((event_type == GDK_TOUCHPAD_PINCH || event_type == GDK_TOUCHPAD_SWIPE) &&
_gtk_gesture_has_matching_touchpoints (gesture))
g_clear_handle_id (&priv->hold_timeout_id, g_source_remove);
if (_gtk_gesture_update_point (gesture, event, target, x, y, TRUE))
{
gboolean triggered_recognition;
@ -738,20 +714,12 @@ gtk_gesture_handle_event (GtkEventController *controller,
_gtk_gesture_cancel_sequence (gesture, sequence);
}
else if ((event_type == GDK_TOUCHPAD_SWIPE && phase == GDK_TOUCHPAD_GESTURE_PHASE_CANCEL) ||
(event_type == GDK_TOUCHPAD_PINCH && phase == GDK_TOUCHPAD_GESTURE_PHASE_CANCEL))
(event_type == GDK_TOUCHPAD_PINCH && phase == GDK_TOUCHPAD_GESTURE_PHASE_CANCEL) ||
(event_type == GDK_TOUCHPAD_HOLD && phase == GDK_TOUCHPAD_GESTURE_PHASE_CANCEL))
{
if (priv->touchpad)
_gtk_gesture_cancel_sequence (gesture, sequence);
}
else if (event_type == GDK_TOUCHPAD_HOLD && phase == GDK_TOUCHPAD_GESTURE_PHASE_CANCEL)
{
if (priv->hold_timeout_id == 0)
{
priv->hold_timeout_id = g_timeout_add (HOLD_TIMEOUT_MS,
gtk_gesture_hold_timeout,
gesture);
}
}
else if (event_type == GDK_GRAB_BROKEN)
{
GdkSurface *surface;
@ -777,10 +745,6 @@ gtk_gesture_handle_event (GtkEventController *controller,
static void
gtk_gesture_reset (GtkEventController *controller)
{
GtkGesture *gesture = GTK_GESTURE (controller);
GtkGesturePrivate *priv = gtk_gesture_get_instance_private (gesture);
g_clear_handle_id (&priv->hold_timeout_id, g_source_remove);
_gtk_gesture_cancel_all (GTK_GESTURE (controller));
}
@ -949,7 +913,6 @@ gtk_gesture_init (GtkGesture *gesture)
priv->points = g_hash_table_new_full (NULL, NULL, NULL,
(GDestroyNotify) free_point_data);
priv->group_link = g_list_prepend (NULL, gesture);
priv->hold_timeout_id = 0;
}
/**