> Il giorno 04/lug/2017, alle ore 16:20, Todd Fabacher via use-livecode > <use-livecode@lists.runrev.com> ha scritto: > > Hello Livecode group, > > I have a situation where we need a slider, not a straight line, but as a > circle. I thing Scott Rossi did a demo of this at San Diego LC conference, > but I can't find the code samples to check. I just need to restrict the > movement to a circle when the user moves their finger. Maybe there is some > kind of dial example somewhere??? > > All I am looking to do is move the slider in the semi-circle to move the > value forward or backwards. > > Thanks, > > Todd
using math: constant kDelay=10 //0,1,100… local sMove on mouseDown put true into sMove moveMe end mouseDown on mouseUp put false into sMove end mouseUp on mouseRelease put false into sMove end mouseRelease on moveMe if not(sMove) then exit moveMe put (the width of grc "circle")/2 into R put (item 1 of the loc of grc "circle") into x0 put (item 2 of the loc of grc "circle") into y0 put min(MAX(the mouseH, the left of grc "circle"), the right of grc "circle") into x put min(MAX(the mouseV, item 2 of the loc of grc "circle"), the bottom of grc "circle") into y put sqrt(R^2 - (x-x0)^2)+y0 into y set the loc of me to x,y put trunc(x),trunc(y) into fld "values" send "moveMe" to me in kDelay millisec end moveMe /******* recipe: - have an oval named "circle". and be it a circle… - have a grc/img with the above script - have a field named "values", just to collect the values - adjust kDelay for your needs - feel free to hide the oval - do what you need with values ********/ regards. re.mu. _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
