Hi everybody,

I'm having an issue with the last version of Qwt.
I'm receiving data in real time, communicating with a robot and i want to plot dynamcally the data on the fly. So I want my yLeft and xBottom axises to change their values dynamically. If the x coordinate of my new point is inferior to my xBotton axis lower bound, it becomes its new lower bound etc ..
I didn't have trouble to do this in previous versions of Qwt using this sample of code : (x and y being the coordinates of the data i receive in real time )

Qt Code: 
  1. if(x < myPlot->axisScaleDiv(QwtPlot::xBottom)->lowerBound())
  2.     {
  3.         if(x < 0)
  4.         {
  5.                     myPlot->setAxisScale(QwtPlot::xBottom,myPlot->axisScaleDiv(QwtPlot::xBottom)->lowerBound()+x-0.02,     \
  6.                     myPlot->axisScaleDiv(QwtPlot::xBottom)->upperBound());
  7.         }
  8.         else
  9.         {
  10.                     myPlot->setAxisScale(QwtPlot::xBottom,myPlot->axisScaleDiv(QwtPlot::xBottom)->lowerBound()-x-0.02,     \
  11.                     myPlot->axisScaleDiv(QwtPlot::xBottom)->upperBound());
  12.         }
  13.  
  14.     }
  15.     else if(x > myPlot->axisScaleDiv(QwtPlot::xBottom)->upperBound())
  16.     {
  17.         myPlot->setAxisScale(QwtPlot::xBottom,myPlot->axisScaleDiv(QwtPlot::xBottom)->lowerBound(),     \
  18.         myPlot->axisScaleDiv(QwtPlot::xBottom)->upperBound()+x+0.02);
  19.     }
  20.     if(y < myPlot->axisScaleDiv(QwtPlot::yLeft)->lowerBound())
  21.     {
  22.         if(y < 0)
  23.         {
  24.                   myPlot->setAxisScale(QwtPlot::yLeft,myPlot->axisScaleDiv(QwtPlot::yLeft)->lowerBound()+y-0.02,     \
  25.                   myPlot->axisScaleDiv(QwtPlot::yLeft)->upperBound());  
  26.         }
  27.         else
  28.         {
  29.                   myPlot->setAxisScale(QwtPlot::yLeft,myPlot->axisScaleDiv(QwtPlot::yLeft)->lowerBound()-y-0.02,     \
  30.                   myPlot->axisScaleDiv(QwtPlot::yLeft)->upperBound());  
  31.         }
  32.  
  33.     }
  34.     else if(y > myPlot->axisScaleDiv(QwtPlot::yLeft)->upperBound())
  35.     {
  36.         myPlot->setAxisScale(QwtPlot::yLeft,myPlot->axisScaleDiv(QwtPlot::yLeft)->lowerBound(),     \
  37.         myPlot->axisScaleDiv(QwtPlot::yLeft)->upperBound()+y+0.02);
  38.     }
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This code worked pretty well, but my problem is that in qwt 6.1.2 you don't access the scale divisions of an axis with a pointer anymore. So this sample of code still works but it lags a lot, and it didn't with pointers.. Is there a simpler way, more memory efficient to do this in qwt 6.1.2 ? Did i miss something with dynamic axises ?

Thanks for your help