Method updateScroll

MyGUIEngine/src/MyGUI_ListBox.cpp:261–294

	}

	void ListBox::updateScroll()
	{
		mRangeIndex = (mHeightLine * (int)mItemsInfo.size()) - _getClientWidget()->getHeight();

		if (mWidgetScroll == nullptr)
			return;

		if ((!mNeedVisibleScroll) || (mRangeIndex < 1) || (mWidgetScroll->getLeft() <= _getClientWidget()->getLeft()))
		{
			if (mWidgetScroll->getVisible())
			{
				mWidgetScroll->setVisible(false);
				// увеличиваем клиентскую зону на ширину скрола
				if (getClientWidget() != nullptr)
					getClientWidget()->setSize(
						getClientWidget()->getWidth() + mWidgetScroll->getWidth(),
						getClientWidget()->getHeight());
			}
		}
		else if (!mWidgetScroll->getVisible())
		{
			if (getClientWidget() != nullptr)
				getClientWidget()->setSize(
					getClientWidget()->getWidth() - mWidgetScroll->getWidth(),
					getClientWidget()->getHeight());
			mWidgetScroll->setVisible(true);
		}

		mWidgetScroll->setScrollRange(mRangeIndex + 1);
		mWidgetScroll->setScrollViewPage(_getClientWidget()->getHeight());
		if (!mItemsInfo.empty())
			mWidgetScroll->setTrackSize(
				mWidgetScroll->getLineSize() * _getClientWidget()->getHeight() / mHeightLine / (int)mItemsInfo.size());
	}

	void ListBox::updateLine(bool _reset)
	{