Hi,

Thanks a lot for the great Qwt!

Is it possible to do something like Qt Charts' "callout" example in Qwt (or something similar)?

This is my task:

1. The mouse cursor's tracker (showing X and Y coordinates) should "snap" to a curve if it's close enough. I'm not sure yet whether it should be the actual curve points or the interpolated curve. I guess just the curve points would be fine.

2. The tracker texts (showing X and Y coordinates) should stay there (maybe as a marker item) when the user clicks (actually, control-clicks) that point. Multiple such markers should be possible. Control-clicking them again should remove them (though this could be done though a context menu to remove all such markers).

Any pointers, examples, or even suggestions to forget about this are welcome!

Thanks a lot!
Alexander