move apis into rom/modules/main for shell compatibility

sys/modules/opus/ui/transition.lua

@@ -0,0 +1,53 @@
+local Tween  = require('opus.ui.tween')
+
+local Transition = { }
+
+function Transition.slideLeft(args)
+	local ticks      = args.ticks or 10
+	local easing     = args.easing or 'outQuint'
+	local pos        = { x = args.ex }
+	local tween      = Tween.new(ticks, pos, { x = args.x }, easing)
+
+	args.canvas:move(pos.x, args.canvas.y)
+
+	return function()
+		local finished = tween:update(1)
+		args.canvas:move(math.floor(pos.x), args.canvas.y)
+		args.canvas:dirty()
+		return not finished
+	end
+end
+
+function Transition.slideRight(args)
+	local ticks      = args.ticks or 10
+	local easing     = args.easing or'outQuint'
+	local pos        = { x = -args.canvas.width }
+	local tween      = Tween.new(ticks, pos, { x = 1 }, easing)
+
+	args.canvas:move(pos.x, args.canvas.y)
+
+	return function()
+		local finished = tween:update(1)
+		args.canvas:move(math.floor(pos.x), args.canvas.y)
+		args.canvas:dirty()
+		return not finished
+	end
+end
+
+function Transition.expandUp(args)
+	local ticks  = args.ticks or 3
+	local easing = args.easing or 'linear'
+	local pos    = { y = args.ey + 1 }
+	local tween  = Tween.new(ticks, pos, { y = args.y }, easing)
+
+	args.canvas:move(args.x, pos.y)
+
+	return function()
+		local finished = tween:update(1)
+		args.canvas:move(args.x, math.floor(pos.y))
+		args.canvas:dirty()
+		return not finished
+	end
+end
+
+return Transition