QwtPlotIntervalCurve's constant width.

[Uwe]

For each temporal discrete I must plot square with value typed inside if value != 0. Every square that represents value of the same vector must be placed at the same Y coordinate.

Assuming that the center of each square in plot coordinates is related to the data ( right ? ) - what about the size of the square. Is it something related to plot or widget coordinates ?

Uwe