Drawing plots from sql data using datetime

[Uwe]

The code translates the dates into milliseconds since Epoch what is correct, when you want to use QwtDateScaleEngine and QwtDateScaleDraw.

All what is missing is:

ui->qwt_plot->setAxisScaleDraw( QwtPlot::xBottom, new DateScaleDraw() );
ui->qwt_plot->setAxisScaleEngine( QwtPlot::xBottom, new QwtDateScaleEngine() );

ui->qwt_plot->setAxisScaleDraw( QwtPlot::xBottom, new DateScaleDraw() );
ui->qwt_plot->setAxisScaleEngine( QwtPlot::xBottom, new QwtDateScaleEngine() );

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Uwe

[RogerWilco77]

Thanks a lot. It was really simple.
I tried not to just copy but to understand.
Well, obviously I would have had to look under QwtPlot and fight my way via setAxisScaleDraw to to the usage of DateScaleDraw...
Now that I know it, it appears so logial....