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gtkgesture: Handle hold gestures

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Hold gestures are used to bring existing gestures on touchpad
semantically closer to touchscreen gestures.

Touchpad gestures observe hold gestures with a matching amount of
fingers and emit their begin and end signals when fingers are detected
or removed on/from the touchpad.

When a hold cancel event is detected, it is required to wait a few
milliseconds until the next event(s) are received to avoid emitting
multiple begin signals.

Part-of: <!3454>
This commit is contained in:
José Expósito 2021-06-28 17:49:35 +02:00 committed by Carlos Garnacho
parent 382341e1bf
commit 3bfcc12ec0
1 changed files with 42 additions and 2 deletions
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44
gtk/gtkgesture.c
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@ -162,6 +162,7 @@ struct _GtkGesturePrivate
GdkDevice *device;
GList *group_link;
guint n_points;
guint hold_timeout_id;
guint recognized : 1;
guint touchpad : 1;
};
@ -174,6 +175,8 @@ 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)
@ -222,6 +225,7 @@ 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);
@ -579,6 +583,22 @@ _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)
@ -641,8 +661,13 @@ gtk_gesture_handle_event (GtkEventController *controller,
if (event_type == GDK_BUTTON_PRESS ||
event_type == GDK_TOUCH_BEGIN ||
(event_type == GDK_TOUCHPAD_SWIPE && phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN) ||
(event_type == GDK_TOUCHPAD_PINCH && phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN))
(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;
@ -673,7 +698,8 @@ gtk_gesture_handle_event (GtkEventController *controller,
else if (event_type == GDK_BUTTON_RELEASE ||
event_type == GDK_TOUCH_END ||
(event_type == GDK_TOUCHPAD_SWIPE && phase == GDK_TOUCHPAD_GESTURE_PHASE_END) ||
(event_type == GDK_TOUCHPAD_PINCH && phase == GDK_TOUCHPAD_GESTURE_PHASE_END))
(event_type == GDK_TOUCHPAD_PINCH && phase == GDK_TOUCHPAD_GESTURE_PHASE_END) ||
(event_type == GDK_TOUCHPAD_HOLD && phase == GDK_TOUCHPAD_GESTURE_PHASE_END))
{
gboolean was_claimed = FALSE;
@ -717,6 +743,15 @@ gtk_gesture_handle_event (GtkEventController *controller,
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;
@ -742,6 +777,10 @@ 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));
}
@ -913,6 +952,7 @@ 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;
}
/**