> -> The problem is the following: I have a little offset in y- and > x-direction, always to the same direction. So the touch > sensitive area > is a bit shifted... > > I really think it is a problem with my calibration routine, > but just to > be sure the following questions:
It's a problem with your calibration. > - Does FLTK filter the mouse/touch positions in any way? > Means: does it > perform someting like a little deeppass filter of so? No - fltk takes the values the WM passes to it. Whatever the touchscreen driver or OS or WM do is all there is. Fltk does nothing more. > - Has anybody else ever had this problem??? Yes, with touchscreens. Depends a lot on the type, but calibration is always an issue, and many types have non-linear scaling across the display. Don't try and fix this in fltk though, that's the wrong place to do it. Fix it in the driver. I have tried in the past to fix non-linear scaling in a fltk app and it was a mess. Fixing the driver was easier and had the benefit that everything benefited. SELEX Sensors and Airborne Systems Limited Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL A company registered in England & Wales. Company no. 02426132 ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
