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local core = require((...):match("(.-)[^%.]+$") .. 'core')
return function(info, x,y,w,h, widgetHit, draw)
assert(type(info) == 'table' and info.value, "Incomplete slider value info")
info.min = info.min or 0
info.max = info.max or math.max(info.value, 1)
info.step = info.step or (info.max - info.min) / 50
local fraction = (info.value - info.min) / (info.max - info.min)
local id = core.generateID()
core.mouse.updateState(id, widgetHit or core.style.widgetHit, x,y,w,h)
core.makeCyclable(id)
core.registerDraw(id,draw or core.style.Slider, fraction, x,y,w,h, info.vertical)
-- mouse update
if core.isActive(id) then
core.setKeyFocus(id)
if info.vertical then
fraction = math.min(1, math.max(0, (y - core.mouse.y + h) / h))
else
fraction = math.min(1, math.max(0, (core.mouse.x - x) / w))
end
local v = fraction * (info.max - info.min) + info.min
if v ~= info.value then
info.value = v
return true
end
end
-- keyboard update
local changed = false
if core.hasKeyFocus(id) then
local keys = info.vertical and {'up', 'down'} or {'right', 'left'}
if core.keyboard.key == keys[1] then
info.value = math.min(info.max, info.value + info.step)
changed = true
elseif core.keyboard.key == keys[2] then
info.value = math.max(info.min, info.value - info.step)
changed = true
end
end
return changed
end
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