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() );

To copy to clipboard, switch view to plain text mode 

Uwe