How to add Button on Legend to enable/disable QwtPlotZoomer ?

[npatil15]

Thanks ghorwin,

Yes by setting additional keyword will help but that's not the task.
And the link/knowledge you share it surely help me for my next task. But now I have some different pain.

Here I'm unable to add any linked instance, button or something like below code for QwtPlotZoomer, where I can click and do something for this clicked event.
(say setItemAttribute(QwtPlotItem::Legend, true);)

[npatil15]

Please anyone has any solution or suggestions over it ?