Multiple setAxisScaleDraw classes

[KenJustKen]

I am using the setAxisScaleDraw class to print the X Axis date in text. However, I would like to change the value of this text based on the current scale of the plot. If the curve data contains less than a few days worth of data, then I would want to use the

virtual QwtText label( double value ) const
{
QDateTime ThisDate;
ThisDate = QDateTime::fromTime_t(value);
return ThisDate.toString("MMM d yy h:m");
}

Else, if the curve data contains more than a few days worth of data I would use

virtual QwtText label( double value ) const
{
QDateTime ThisDate;
ThisDate = QDateTime::fromTime_t(value);
return ThisDate.toString("MMM d yy");
}

Whats the best way to accomplish this.

Do I add a different QwtScaleDraw that would return the correct version?

But I am also using a zoomer which means that I may want to automatically switch when I zoom in. I know I am missing something in the docs, but I can't figure it out.

[Uwe]

virtual QwtText label( double value ) const
{
    QDateTime ThisDate = QDateTime::fromTime_t(value);
    if ( scaleDiv().range() < ... )
        return ThisDate.toString("MMM d yy h:m");
    else
        return ThisDate.toString("MMM d yy");
    }
}

virtual QwtText label( double value ) const
{
    QDateTime ThisDate = QDateTime::fromTime_t(value);
    if ( scaleDiv().range() < ... )
        return ThisDate.toString("MMM d yy h:m");
    else
        return ThisDate.toString("MMM d yy");
    }
}

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Uwe

[KenJustKen]

Worked perfectly. Thanks!