static gboolean
_gtk_gesture_multi_press_check_within_threshold (GtkGestureMultiPress *gesture,
gdouble x,
gdouble y)
{
GtkGestureMultiPressPrivate *priv;
guint double_click_distance;
GtkSettings *settings;
GtkWidget *widget;
priv = gtk_gesture_multi_press_get_instance_private (gesture);
if (priv->n_presses == 0)
return TRUE;
widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
settings = gtk_widget_get_settings (widget);
g_object_get (settings,
"gtk-double-click-distance", &double_click_distance,
NULL);
if (ABS (priv->initial_press_x - x) < double_click_distance &&
ABS (priv->initial_press_y - y) < double_click_distance)
{
if (!priv->rect_is_set ||
(x >= priv->rect.x && x < priv->rect.x + priv->rect.width &&
y >= priv->rect.y && y < priv->rect.y + priv->rect.height))
return TRUE;
}
return FALSE;
}
static void
gtk_gesture_multi_press_begin (GtkGesture *gesture,
GdkEventSequence *sequence)
{
GtkGestureMultiPress *multi_press;
GtkGestureMultiPressPrivate *priv;
guint n_presses, button = 1;
GdkEventSequence *current;
const GdkEvent *event;
GdkDevice *device;
gdouble x, y;
if (!gtk_gesture_handles_sequence (gesture, sequence))
return;
multi_press = GTK_GESTURE_MULTI_PRESS (gesture);
priv = gtk_gesture_multi_press_get_instance_private (multi_press);
event = gtk_gesture_get_last_event (gesture, sequence);
current = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
device = gdk_event_get_source_device (event);
if (event->type == GDK_BUTTON_PRESS)
button = event->button.button;
else if (event->type == GDK_TOUCH_BEGIN)
button = 1;
else
return;
/* Reset the gesture if the button number changes mid-recognition */
if (priv->n_presses > 0 &&
priv->current_button != button)
_gtk_gesture_multi_press_stop (multi_press);
/* Reset also if the device changed */
if (priv->current_device && priv->current_device != device)
_gtk_gesture_multi_press_stop (multi_press);
priv->current_device = device;
priv->current_button = button;
_gtk_gesture_multi_press_update_timeout (multi_press);
gtk_gesture_get_point (gesture, current, &x, &y);
if (!_gtk_gesture_multi_press_check_within_threshold (multi_press, x, y))
_gtk_gesture_multi_press_stop (multi_press);
/* Increment later the real counter, just if the gesture is
* reset on the pressed handler */
n_presses = priv->n_release = priv->n_presses + 1;
g_signal_emit (gesture, signals[PRESSED], 0, n_presses, x, y);
if (priv->n_presses == 0)
{
priv->initial_press_x = x;
priv->initial_press_y = y;
}
priv->n_presses++;
}
static gboolean
_double_click_timeout_cb (gpointer user_data)
{
GtkGestureMultiPress *gesture = user_data;
GtkGestureMultiPressPrivate *priv;
priv = gtk_gesture_multi_press_get_instance_private (gesture);
priv->double_click_timeout_id = 0;
_gtk_gesture_multi_press_stop (gesture);
return FALSE;
}
static void
_gtk_gesture_multi_press_stop (GtkGestureMultiPress *gesture)
{
GtkGestureMultiPressPrivate *priv;
priv = gtk_gesture_multi_press_get_instance_private (gesture);
if (priv->n_presses == 0)
return;
priv->current_button = 0;
priv->n_presses = 0;
g_signal_emit (gesture, signals[STOPPED], 0);
_gtk_gesture_check (GTK_GESTURE (gesture));
}
static gboolean
gtk_gesture_multi_press_check (GtkGesture *gesture)
{
GtkGestureMultiPress *multi_press;
GtkGestureMultiPressPrivate *priv;
GList *sequences;
gboolean active;
multi_press = GTK_GESTURE_MULTI_PRESS (gesture);
priv = gtk_gesture_multi_press_get_instance_private (multi_press);
sequences = gtk_gesture_get_sequences (gesture);
active = g_list_length (sequences) == 1 || priv->double_click_timeout_id;
g_list_free (sequences);
return active;
}
static void
gtk_gesture_multi_press_finalize (GObject *object)
{
GtkGestureMultiPressPrivate *priv;
GtkGestureMultiPress *gesture;
gesture = GTK_GESTURE_MULTI_PRESS (object);
priv = gtk_gesture_multi_press_get_instance_private (gesture);
if (priv->double_click_timeout_id)
{
g_source_remove (priv->double_click_timeout_id);
priv->double_click_timeout_id = 0;
}
G_OBJECT_CLASS (gtk_gesture_multi_press_parent_class)->finalize (object);
}
static void
gtk_gesture_multi_press_end (GtkGesture *gesture,
GdkEventSequence *sequence)
{
GtkGestureMultiPress *multi_press;
GtkGestureMultiPressPrivate *priv;
GdkEventSequence *current;
gdouble x, y;
multi_press = GTK_GESTURE_MULTI_PRESS (gesture);
priv = gtk_gesture_multi_press_get_instance_private (multi_press);
current = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
gtk_gesture_get_point (gesture, current, &x, &y);
g_signal_emit (gesture, signals[RELEASED], 0, priv->n_release, x, y);
priv->n_release = 0;
}
/**
* gtk_gesture_multi_press_set_area:
* @gesture: a #GtkGestureMultiPress
* @rect: (allow-none): rectangle to receive coordinates on
*
* If @rect is non-%NULL, the press area will be checked to be
* confined within the rectangle, otherwise the button count
* will be reset so the press is seen as being the first one.
* If @rect is %NULL, the area will be reset to an unrestricted
* state.
*
* Note: The rectangle is only used to determine whether any
* non-first click falls within the expected area. This is not
* akin to an input shape.
*
* Since: 3.14
**/
void
gtk_gesture_multi_press_set_area (GtkGestureMultiPress *gesture,
const GdkRectangle *rect)
{
GtkGestureMultiPressPrivate *priv;
g_return_if_fail (GTK_IS_GESTURE_MULTI_PRESS (gesture));
priv = gtk_gesture_multi_press_get_instance_private (gesture);
if (!rect)
priv->rect_is_set = FALSE;
else
{
priv->rect_is_set = TRUE;
priv->rect = *rect;
}
}
static void
_gtk_gesture_multi_press_update_timeout (GtkGestureMultiPress *gesture)
{
GtkGestureMultiPressPrivate *priv;
guint double_click_time;
GtkSettings *settings;
GtkWidget *widget;
priv = gtk_gesture_multi_press_get_instance_private (gesture);
if (priv->double_click_timeout_id)
g_source_remove (priv->double_click_timeout_id);
widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
settings = gtk_widget_get_settings (widget);
g_object_get (settings, "gtk-double-click-time", &double_click_time, NULL);
priv->double_click_timeout_id =
gdk_threads_add_timeout (double_click_time,
_double_click_timeout_cb,
gesture);
}
static void
gtk_gesture_multi_press_end (GtkGesture *gesture,
GdkEventSequence *sequence)
{
GtkGestureMultiPress *multi_press;
GtkGestureMultiPressPrivate *priv;
GdkEventSequence *current;
gdouble x, y;
gboolean interpreted;
GtkEventSequenceState state;
multi_press = GTK_GESTURE_MULTI_PRESS (gesture);
priv = gtk_gesture_multi_press_get_instance_private (multi_press);
current = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
interpreted = gtk_gesture_get_point (gesture, current, &x, &y);
state = gtk_gesture_get_sequence_state (gesture, current);
if (state != GTK_EVENT_SEQUENCE_DENIED && interpreted)
g_signal_emit (gesture, signals[RELEASED], 0, priv->n_release, x, y);
priv->n_release = 0;
}
/**
* gtk_gesture_multi_press_get_area:
* @gesture: a #GtkGestureMultiPress
* @rect: (out): return location for the press area
*
* If an area was set through gtk_gesture_multi_press_set_area(),
* this function will return %TRUE and fill in @rect with the
* press area. See gtk_gesture_multi_press_set_area() for more
* details on what the press area represents.
*
* Returns: %TRUE if @rect was filled with the press area
*
* Since: 3.14
**/
gboolean
gtk_gesture_multi_press_get_area (GtkGestureMultiPress *gesture,
GdkRectangle *rect)
{
GtkGestureMultiPressPrivate *priv;
g_return_val_if_fail (GTK_IS_GESTURE_MULTI_PRESS (gesture), FALSE);
priv = gtk_gesture_multi_press_get_instance_private (gesture);
if (rect)
{
if (priv->rect_is_set)
*rect = priv->rect;
else
{
rect->x = rect->y = G_MININT;
rect->width = rect->height = G_MAXINT;
}
}
return priv->rect_is_set;
}
