bool GestureController::Gesture::isActive() const
{
    return gtk_gesture_is_active(m_gesture.get());
}
Beispiel #2
0
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;
}