20 lines
789 B
Elm
20 lines
789 B
Elm
-- This is an early version of the touch library. It will likely grow to
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-- include gestures that would be useful for both games and web-pages.
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module Touch where
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import Native.Touch as T
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-- Every `Touch` has `xy` coordinates. It also has an identifier `id` to
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-- distinguish one touch from another.
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--
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-- A touch also keeps info about the intial point and time of contact:
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-- `x0`, `y0`, and `t0`. This helps compute more complicated gestures
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-- like taps, drags, and swipes which need to know about timing or direction.
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type Touch = { x:Int, y:Int, id:Int, x0:Int, y0:Int, t0:Time }
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-- A list of ongoing touches.
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touches : Signal [Touch]
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-- The last position that was tapped. Default value is `{x=0,y=0}`.
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-- Updates whenever the user taps the screen.
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taps : Signal { x:Int, y:Int }
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