def cellSize(self, leafIndex, hv, styleOptions):
res = QSize()
variant = leafIndex.data(Qt.SizeHintRole)
if variant:
res = variant
fnt = QFont(hv.font())
var = leafIndex.data(Qt.FontRole)
if var:
fnt = var
fnt.setBold(True)
fm = QFontMetrics(fnt)
size = QSize(fm.size(0, leafIndex.data(Qt.DisplayRole))+QSize(4, 0)) #WA: add more horizontal size (4px)
if leafIndex.data(Qt.UserRole):
size.transpose()
decorationsSize = QSize(hv.style().sizeFromContents(QStyle.CT_HeaderSection, styleOptions, QSize(), hv))
emptyTextSize = QSize(fm.size(0, ""))
return res.expandedTo(size+decorationsSize-emptyTextSize)
