Hi,
I need to implement the following functionality and am having trouble getting
started.
With a qwtplot having focus hitting a 'c' on the keyboard will cause a red cross
hair to appear in the graph. Using the mouse or the arrow keys will cause the
intersection point of the red crosshairs to follow the displayed curve.
I can get the red crosshair to appear when I click in the plot, but it disappears
as soon as I release the mouse.
Having the crosshair follow the curve - I have no idea...
Can someone point me in the right direction?
Thanks!
Mark
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