Well this is one of the parts where the design of the Qwt classes is week. The main problem is, that there are local zoom stacks ( local for each zoomer object ) but not a general navigation stack recording the history of all navigation operations.
Probably the best you can do is to modify the zoom stack ( zoomStack/setZoomStack ) manually in a slot connected to the panned signal of your panner.
Uwe
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