def fixXExponent(self, canvas):
'''
If there's an exponent on the Y axis, it will either be in a weird
place or it will overlap with the axis title. We fix the placement in
__init__(), but we still have to move the title if need be.
Recursive, so we find histograms in pads in pads.
'''
for obj in canvas.GetListOfPrimitives():
if obj.InheritsFrom(TH1.Class()) or obj.InheritsFrom(
THStack.Class()):
axis = obj.GetXaxis()
if axis.GetXmax() >= 10**TGaxis.GetMaxDigits():
# has exponent
axis.CenterTitle()
if obj.InheritsFrom(TPad.Class()):
self.fixXExponent(obj)
