Convert panned() parameters to plot values

[TheBadger]

Hi,

I am using a QwtPlotPanner to pan a plot.
I connect to the QwtPlotPanner:anned(int,int) signal and in the slot I want to convert the dx value to the corresponding value on the plot.

What I am doing:
I click the plot and pan it by 5 units (by checking the axis values)
Then in my slot I debug a few values as follow:

double dxInv = plot->invTransform(QwtPlot::xBottom, dx);
    qDebug() << "dx   : " << dx;
    qDebug() << "dxInv: " << dxInv;

double dxInv = plot->invTransform(QwtPlot::xBottom, dx);
    qDebug() << "dx   : " << dx;
    qDebug() << "dxInv: " << dxInv;

To copy to clipboard, switch view to plain text mode 

and the output is:

dx   :  -81 
dxInv:  49.768

dx   :  -81 
dxInv:  49.768

To copy to clipboard, switch view to plain text mode 

If I pan 10 units I get:

dx   :  -159 
dxInv:  49.8353

dx   :  -159 
dxInv:  49.8353

To copy to clipboard, switch view to plain text mode 

What should I do to actually get the panned amount in the coordinates of the axis (5 in the first example and 10 in the second)?

Regards,