I have a scenario where i should be plotting real time data for an hour. But first i have to display only first 2 min in x axis, when time reaches 2 min i should expand my scale to 4 min and it should keep on going......
I tried using QwtPlotDirectPainter which is efficient but after 2 min , i dont know how to rescale it to 4 min ....
But if i use QwtPlotCurve with replot() and autoaxisscale() feature , i am able to acheive this, but with delay in plotting as time increases ....
Any help will be appreciated.....
I feel QwtPlotDirectPainter will be efficient, please give a solution with it.....
I tried looking at Oscilloscope example , i could not get it....If possible try give source code with explanation......
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