Method updateDrag

UnitTests/UnitTest_GraphView/BaseGraphView.h:305–371

		}

		void updateDrag(BaseGraphConnection* _connection) override
		{
			if (mIsDrug)
			{
				// нод откуда тянется не всегда может быть сендером
				_connection = mConnectionStart;

				const MyGUI::IntPoint& mouse = MyGUI::InputManager::getInstance().getMousePosition();
				//const MyGUI::IntCoord& coord = _node->getAbsoluteCoord();
				mDrugLine.point_end.set(mouse.left - mCanvas->getAbsoluteLeft(), mouse.top - mCanvas->getAbsoluteTop());

				// устанавлваем длинну загиба от дистанции
				double distance = ((mDrugLine.point_end.left - mDrugLine.point_start.left) *
								   (mDrugLine.point_end.left - mDrugLine.point_start.left)) +
					((mDrugLine.point_end.top - mDrugLine.point_start.top) *
					 (mDrugLine.point_end.top - mDrugLine.point_start.top));
				distance = std::sqrt(distance);

				mDrugLine.start_offset = _connection->getOffset();

				const int offset = 30;
				distance *= 0.5;
				if (distance < 1)
					distance = 1;
				else if (distance > offset)
					distance = offset;
				if (mDrugLine.start_offset.height != 0)
				{
					if (mDrugLine.start_offset.height < 0)
						mDrugLine.start_offset.height = -(int)distance;
					else
						mDrugLine.start_offset.height = (int)distance;
				}
				if (mDrugLine.start_offset.width != 0)
				{
					if (mDrugLine.start_offset.width < 0)
						mDrugLine.start_offset.width = -(int)distance;
					else
						mDrugLine.start_offset.width = (int)distance;
				}

				// пикаем виджет под нами
				MyGUI::Widget* widget = MyGUI::LayerManager::getInstance().getWidgetFromPoint(mouse.left, mouse.top);
				if (widget != nullptr)
				{
					BaseGraphConnection** connection = widget->getUserData<BaseGraphConnection*>(false);
					if (connection != nullptr)
					{
						bool accept = requestConnectToPoint(_connection, *connection);
						if (accept)
							mDrugLine.colour = MyGUI::Colour::Green;
						else
							mDrugLine.colour = MyGUI::Colour::Red;
					}
					else
					{
						mDrugLine.colour = MyGUI::Colour::White;
					}