QT使用tableWidget显示双排列表 而且选中用红框圈出来

QTableWidgetItem* item[50];

int Row;
if (num%2 == 1)
{
Row = num/picColumn+1;
}
else
{
Row = num/picColumn;
}

int index;//表格坐标转换为0-n索引

ui.tableWidgetPicList->setRowCount(Row);//行数
ui.tableWidgetPicList->setColumnCount(picColumn);//列数

ui.tableWidgetPicList->setIconSize(QSize(PicWidth,PicHeight));//设置图片大小

ui.tableWidgetPicList->setEditTriggers(QAbstractItemView::NoEditTriggers);//不可编辑

ui.tableWidgetPicList->setShowGrid(false);//显示表格线

ui.tableWidgetPicList->setColumnWidth(0,PicWidth+10);//第一列宽度
ui.tableWidgetPicList->setColumnWidth(1,PicHeight+10);//第二列宽度

ui.tableWidgetPicList->verticalHeader()->setVisible(false);   //隐藏列表头
ui.tableWidgetPicList->horizontalHeader()->setVisible(false); //隐藏行表头
QTableWidgetItem *pNewItem = new QTableWidgetItem();

for (int i=0;i<Row;i++)
{
for (int j=0;j<picColumn;j++)
{

index = picColumn*i+j;
if (index != num)
{
ui.tableWidgetPicList->setRowHeight(i,PicHeight+10);//设置第i行高度

item[index] = new QTableWidgetItem();
item[index]->setIcon(QIcon(path[index]));
ui.tableWidgetPicList->setItem(i,j,item[index]);
}
}
}

setStyleSheet("QTableWidget::item:selected { background-image:url(background_red_110_110.png) }");//更改QTableWidget选中样式

ui.tableWidgetPicList->item(item->row(),item->column())->setBackground(QBrush(QPixmap("background_red_110_110.png")));