bool GestureController::Gesture::isActive() const
{
return gtk_gesture_is_active(m_gesture.get());
}
static gboolean
gtk_gesture_single_handle_event (GtkEventController *controller,
const GdkEvent *event)
{
GdkEventSequence *sequence = NULL;
GtkGestureSinglePrivate *priv;
GdkDevice *source_device;
GdkInputSource source;
guint button = 0, i;
gboolean retval, test_touchscreen = FALSE;
source_device = gdk_event_get_source_device (event);
if (!source_device)
return FALSE;
priv = gtk_gesture_single_get_instance_private (GTK_GESTURE_SINGLE (controller));
source = gdk_device_get_source (source_device);
if (source != GDK_SOURCE_TOUCHSCREEN)
test_touchscreen = gtk_simulate_touchscreen ();
switch (event->type)
{
case GDK_TOUCH_BEGIN:
case GDK_TOUCH_END:
case GDK_TOUCH_UPDATE:
if (priv->exclusive && !event->touch.emulating_pointer)
return FALSE;
sequence = event->touch.sequence;
button = 1;
break;
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
if (priv->touch_only && !test_touchscreen && source != GDK_SOURCE_TOUCHSCREEN)
return FALSE;
button = event->button.button;
break;
case GDK_MOTION_NOTIFY:
if (!gtk_gesture_handles_sequence (GTK_GESTURE (controller), sequence))
return FALSE;
if (priv->touch_only && !test_touchscreen && source != GDK_SOURCE_TOUCHSCREEN)
return FALSE;
if (priv->current_button > 0 && priv->current_button <= 5 &&
(event->motion.state & (GDK_BUTTON1_MASK << (priv->current_button - 1))))
button = priv->current_button;
else if (priv->current_button == 0)
{
/* No current button, find out from the mask */
for (i = 0; i < 3; i++)
{
if ((event->motion.state & (GDK_BUTTON1_MASK << i)) == 0)
continue;
button = i + 1;
break;
}
}
break;
case GDK_TOUCH_CANCEL:
case GDK_GRAB_BROKEN:
return GTK_EVENT_CONTROLLER_CLASS (gtk_gesture_single_parent_class)->handle_event (controller,
event);
break;
default:
return FALSE;
}
if (button == 0 ||
(priv->button != 0 && priv->button != button) ||
(priv->current_button != 0 && priv->current_button != button))
{
if (gtk_gesture_is_active (GTK_GESTURE (controller)))
gtk_event_controller_reset (controller);
return FALSE;
}
if (event->type == GDK_BUTTON_PRESS || event->type == GDK_TOUCH_BEGIN ||
event->type == GDK_MOTION_NOTIFY || event->type == GDK_TOUCH_UPDATE)
{
if (!gtk_gesture_is_active (GTK_GESTURE (controller)))
priv->current_sequence = sequence;
priv->current_button = button;
}
retval = GTK_EVENT_CONTROLLER_CLASS (gtk_gesture_single_parent_class)->handle_event (controller, event);
if (sequence == priv->current_sequence &&
(event->type == GDK_BUTTON_RELEASE || event->type == GDK_TOUCH_END))
priv->current_button = 0;
else if (priv->current_sequence == sequence &&
!gtk_gesture_handles_sequence (GTK_GESTURE (controller), sequence))
{
if (button == priv->current_button && event->type == GDK_BUTTON_PRESS)
priv->current_button = 0;
else if (sequence == priv->current_sequence && event->type == GDK_TOUCH_BEGIN)
priv->current_sequence = NULL;
}
return retval;
}