# To subscribers of the xforms list from Jan Menzel <jmenzel@mail.desy.de> :
On Thu, 30 Nov 2000 justin.turnage@lmco.com wrote:
> # To subscribers of the xforms list from justin.turnage@lmco.com :
>
> Greetings to all:
>
> I am trying to come up with a zoom in feature on my XY Plots that I
> use for analysis purposes. I know what to do about zooming in on an
> area but I'm having trouble trying to figure out how I can visually
> highlight an area in the XY Plot in XFORMS with the mouse. I'm not
> sure whether this capability is in XFORMS or not but I thought I would
> ask.
>
I would suggest adding a prehandler for doing it. You have to catch the
FL_DRAW event for drawing additional private objects. If you catch in
addition the events for pushing and releasing the left mouse button you
can get the coordinates for the corners of the area to zoom.
Regards Jan
------------------------------------------------
Dipl. Phys. | mailto: jan.menzel@gmx.de
Jan Menzel | http://www.lighting-solutions.de
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