The methods QCPAxis::pixelToCoord and QCPAxis::coordToPixel use the width or height of the axis to estimate the expected value.
As these methods (width() and height()) return the number of pixels used by the axisRect, is it accurate to use them ? (instead of right() - left() or bottom()-top())

Example :
QCPRange lower :100 upper :200
QCPAxisRect left(): 100 right(): 200 width() : 101

coordToPixel(200) = 201 // expected 200 ??
pixelToCoord(200) = 199 // expected 200 ??