Method event

qt/draw_widget.cpp:206–254

}

bool DrawWidget::event(QEvent * event)
{
#if !defined(OMIM_OS_LINUX)
  return QOpenGLWidget::event(event);
#else
  // TouchScreen
  if (auto dfTouchEventType = qtTouchEventTypeToDfTouchEventType(event->type());
      dfTouchEventType != df::TouchEvent::TOUCH_NONE)
  {
    event->accept();
    QTouchEvent const * qtTouchEvent = dynamic_cast<QTouchEvent const *>(event);
    df::TouchEvent dfTouchEvent;
    // The SetTouchType hast to be set even if `qtTouchEvent->points()` is empty
    // which theoretically can happen in case of `QEvent::TouchCancel`
    dfTouchEvent.SetTouchType(dfTouchEventType);

    int64_t i = 0;
    for (auto it = qtTouchEvent->points().cbegin();
         it != qtTouchEvent->points().cend() && i < 2; /* For now drape_frontend can only handle max 2 touches */
         ++it, ++i)
    {
      df::Touch touch;
      touch.m_id = i;
      touch.m_location = m2::PointD(L2D(it->position().x()), L2D(it->position().y()));
      if (i == 0)
        dfTouchEvent.SetFirstTouch(touch);
      else
        dfTouchEvent.SetSecondTouch(touch);
    }
    m_framework.TouchEvent(dfTouchEvent);
    return true;
  }
  // TouchPad
  else if (event->type() == QEvent::NativeGesture)
  {
    event->accept();
    auto qNativeGestureEvent = dynamic_cast<QNativeGestureEvent *>(event);
    if (qNativeGestureEvent->gestureType() == Qt::ZoomNativeGesture)
    {
      QPointF const pos = qNativeGestureEvent->position();
      double const factor = qNativeGestureEvent->value();
      m_framework.Scale(exp(factor), m2::PointD(L2D(pos.x()), L2D(pos.y())), false);
      return true;
    }
  }
  // Everything else
  return QOpenGLWidget::event(event);
#endif
}

void DrawWidget::mousePressEvent(QMouseEvent * e)
{