97 lines
2.5 KiB
Lua
97 lines
2.5 KiB
Lua
local path = string.sub(..., 1, string.len(...) - string.len(".shell.button"))
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local state = require(path.. ".hooks.state")
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local input = require(path.. ".core.input")
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local function clamp(num, min, max)
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local min, max = min or 0, max or 1
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return math.max(math.min(num, 1), 0)
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end
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local function round(num)
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return math.floor(num+0.5)
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end
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local function calcPercent(min, val, max)
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return clamp((val-min)/(max - min))
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end
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local function mapToValueRange(pct, minVal, maxVal, divider)
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return (round(((maxVal-minVal)*pct) / divider) * divider)+minVal
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end
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local function mapCoordToVal(minCoord, maxCoord, minVal, maxVal, divider, coord)
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return mapToValueRange(calcPercent(minCoord, coord, maxCoord), minVal, maxVal, divider)
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end
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return function(values, w, h, onChange, onFinish, onClick, onRelease, onEnter, onExit, x, y)
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local vertical = h > w
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local originx, originy = x or 0, y or 0
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local slider = state {
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value = values.start or ((values.max - values.min)/2)+values.min or 0,
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divisions = values.divider or 1,
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min = values.min or 0,
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max = values.max or values.start or 0,
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}
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local handle = state {
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x = 0,
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y = 0,
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over = false,
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down = false,
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}
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if vertical then
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handle.y = calcPercent(slider.min, slider.value, slider.max) * h + originy
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else
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handle.x = calcPercent(slider.min, slider.value, slider.max) * w + originx
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end
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input('dragged', function(x, y, dx, dy)
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if vertical then
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slider.value = mapCoordToVal(originy, h, slider.min, slider.max, slider.divisions, y)
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handle.y = calcPercent(slider.min, slider.value, slider.max) * h + originy
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else
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slider.value = mapCoordToVal(originx, w, slider.min, slider.max, slider.divisions, x)
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handle.x = calcPercent(slider.min, slider.value, slider.max) * w + originx
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end
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if onChange then
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onChange(slider.value)
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end
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handle.down = true
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return function(x, y)
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handle.down = false
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if vertical then
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slider.value = mapCoordToVal(originy, h, slider.min, slider.max, slider.divisions, y)
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handle.y = calcPercent(slider.min, slider.value, slider.max) * h + originy
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else
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slider.value = mapCoordToVal(originx, w, slider.min, slider.max, slider.divisions, x)
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handle.x = calcPercent(slider.min, slider.value, slider.max) * w + originx
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end
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if onFinish then
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onFinish(slider.value)
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end
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end
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end)
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input('hover', function(x, y, w, h)
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if onEnter then
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onEnter(x, y, w, h)
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end
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handle.over = true
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return function(x, y, w, h)
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if onExit then
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onExit(x, y, w, h)
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end
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handle.over = false
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end
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end)
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return slider, handle
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end |