You need to change the size of the icons in the QTableWidget
. You can do so using the iconSize
property inherited from QAbstractItemView
. See here.
QTableWidget *table = new QTableWidget(this);
table->setIconSize(QSize(100, 100));
QTableWidgetItem *item = new QTableWidgetItem;
item->setSizeHint(QSize(100, 100));
item->setIcon(QIcon(fileName));
table->setItem(0, 0, item);