Problems with blank space in the list widget

[IknowQT]

There is white space in the list widget.
What should I do in this case? Because I put the list widget inside the frame, it should look stretched.
Click in the margin to make a selection as well.

for (int i = (int)cModelCommon::CELL_TYPE::Single; i < (int)cModelCommon::CELL_TYPE::Max; i++)
	{
		QSize btnSize(30, this->size().height() * 11 / 100);

		QListWidgetItem*	pItem = new QListWidgetItem(this->ui.listWidget);
		usrCellTypeButton*	pBtn  = new usrCellTypeButton(this);
		{			
			pBtn->setMinimumSize(btnSize);
			pBtn->setFont(cGlobalParam::gGetCellTypeFont());
			pBtn->SetBtnID(i); 
			pBtn->setCheckable(true);
			
			if( i == (int)cModelCommon::CELL_TYPE::Single || i == (int)cModelCommon::CELL_TYPE::Multi )
				pBtn->SetTitle(m_pModelInfo->EnumtoStringCellType((cModelCommon::CELL_TYPE)i)+" Cell");
			else
				pBtn->SetTitle(m_pModelInfo->EnumtoStringCellType((cModelCommon::CELL_TYPE)i));

			m_pBtnGroup->addButton(pBtn, i);
		}

		pItem->setSizeHint(btnSize);
		this->ui.listWidget->addItem(pItem);
		this->ui.listWidget->setItemWidget(pItem, pBtn);
	}

[IknowQT]

@jsulm

That space was the position of the scrollbar. I don't know why, but the scrollbar doesn't appear properly. I hide it with Qt::ScrollBarAlwaysOff so it is displayed normally.

[jsulm]

@IknowQT What about posting code where you add your list widget to the frame? Did you add the list widget to a layout in the frame?

[IknowQT]

@jsulm

That space was the position of the scrollbar. I don't know why, but the scrollbar doesn't appear properly. I hide it with Qt::ScrollBarAlwaysOff so it is displayed normally.