Qwt X-Axis with Date, correct distance

[Lykanthropie]

Hi there,

I have a list with some tuples like [(datetime.date, int), (datetime.date, int),].

I can already plot one date per tick, but I want to have the correct distance between two different dates.

class TimeScaleDraw(QwtScaleDraw):
    def __init__(self, dates):
        QwtScaleDraw.__init__(self)
        self.dates = dates
        self.setLabelAlignment(Qt.AlignLeft | Qt.AlignBottom)
        self.setLabelRotation(270)
 
 
    def label(self, value):
        if value % 1 == 0 and int(value) < len(self.dates):
            return QwtText(str(self.dates[int(value)]))
        else:
            return QwtText('')

class TimeScaleDraw(QwtScaleDraw):
    def __init__(self, dates):
        QwtScaleDraw.__init__(self)
        self.dates = dates
        self.setLabelAlignment(Qt.AlignLeft | Qt.AlignBottom)
        self.setLabelRotation(270)
 
    
    def label(self, value):
        if value % 1 == 0 and int(value) < len(self.dates):
            return QwtText(str(self.dates[int(value)]))
        else:
            return QwtText('')

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I have no idea how I can create a 'time true' axis.

The dates for example are 2010-02-01, 2010-10-14, 2010-11-11, 2011-03-28.

I am using PyQt4.Qwt5.