mirror of
https://github.com/airstruck/luigi.git
synced 2025-12-19 10:26:43 +00:00
67 lines
1.7 KiB
Lua
67 lines
1.7 KiB
Lua
return function (self)
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local function clamp (value)
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return value < 0 and 0 or value > 1 and 1 or value
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end
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self.value = clamp(self.value or 0.5)
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self.step = self.step or 0.01
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self.flow = 'x' -- TODO: support vertical slider
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local spacer = self:addChild()
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local thumb = self:addChild {
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type = 'button',
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align = 'middle center',
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width = 0,
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margin = 0,
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}
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local function unpress ()
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thumb.pressed = false -- don't make the thumb appear pushed in
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return false -- don't press thumb on focused keyboard activation
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end
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thumb:onPressStart(unpress)
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thumb:onPressEnter(unpress)
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thumb:onKeyPress(function (event)
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local key = event.key
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if key == 'left' or key == 'down' then
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self.value = clamp(self.value - self.step)
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elseif event.key == 'right' or key == 'up' then
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self.value = clamp(self.value + self.step)
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end
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end)
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local function press (event)
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local x1, y1, x2, y2 = self:getRectangle(true, true)
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local halfThumb = thumb:getWidth() / 2
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x1, x2 = x1 + halfThumb, x2 - halfThumb
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self.value = clamp((event.x - x1) / (x2 - x1))
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thumb:focus()
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end
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self:onPressStart(press)
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self:onPressDrag(press)
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self:onEnter(function (event)
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thumb.hovered = true
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end)
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self:onLeave(function (event)
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thumb.hovered = false
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end)
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self:onChange(function (event)
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self:reshape()
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end)
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self:onReshape(function (event)
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local x1, y1, x2, y2 = self:getRectangle(true, true)
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local halfThumb = thumb:getWidth() / 2
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x1, x2 = x1 + halfThumb, x2 - halfThumb
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spacer.width = self.value * (x2 - x1)
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end)
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end
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