Plotting from Left to Right ??

[dheeraj]

Hi friends, I have a small problem. I am working on a Qwt related project for plotting graphs.
I need the plotting to start from the left corner of the Qwt Plot Widget to the right . I checked the qwt example data_plot but they are generating values randomly and plotting.But i am actually acquiring data from a db and plotting but the plot happens right to left. How can i achieve this. ?



Thank You

[Uwe]

Invert the scale of your x-axis ( QwtScaleEngine::setAttribute( QwtScaleEngine::Inverted ) )

Uwe

[dheeraj]

Hi uwe thankx for the reply. !! But where do put this line. How do i use it. ( QwtScaleEngine::setAttribute( QwtScaleEngine::Inverted ) ) in the program.

myPlot->setTitle("Temperature Channel");
myPlot->setAxisTitle(QwtPlot::xBottom, "Time/seconds");
////////////////////////////////////
 myPlot->setAxisScale(QwtPlot::xBottom, m_time, m_time + 100);

myPlot->setTitle("Temperature Channel");
myPlot->setAxisTitle(QwtPlot::xBottom, "Time/seconds");
////////////////////////////////////
 myPlot->setAxisScale(QwtPlot::xBottom, m_time, m_time + 100);

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Thank You

[jpn]

Take a look at QwtPlot docs. There is a method to get the axis scale engine.