int columnSize = 0;
for (int i = 0; i < model()->columnCount(); i++) {
if (!isColumnHidden(i))
columnSize += sizeHintForColumn(i);
}
int columnSize = 0;
for (int i = 0; i < model()->columnCount(); i++) {
if (!isColumnHidden(i))
columnSize += sizeHintForColumn(i);
}