Tooltip in Qwt

[Uwe]

I was actually looking at Qwtplotpicker class but problem with that was QwtPlotPicker (int xAxis, int yAxis, QwtPlotCanvas * canvas) has xAxis and yAxis as int but my data (xarray and yarray) are in double ...

xAxis/yAxis specifies the axes ( = coordinate system ) of the picker but not the coordinates. Possible values are f.e yLeft/xBottom.

Your answer shows that you completely misunderstood, what a picker is about.

Uwe

[hamid ghous]

Hi Uwe,

Yeh you are right I didnt understand what's actually Qwtplotpicker class is doing... I through its documentation again and again and now I am trying to implement it. But I am getting an error on my first step.
Here is it..

QwtPlotCanvas qc(myPlot);

int xAxis = myPlot->xBottom;
int yAxis=myPlot->yLeft;

QwtPlotPicker *pk = new (xAxis, yAxis, QwtPicker::PointSelection , QwtPlotPicker::RectRubberBand, QwtPicker::AlwaysOn, qc);


Error is: No matching function for call to QwtPlotPicker::QwtPlotPicker(.....)

I know I am doing some kind of basic mistake but I have gone through some docs but couldnt find it y its giving me this error.

Thanks for you help.

cheers,