47 lines
1.4 KiB
Lua
47 lines
1.4 KiB
Lua
require("common.class")
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local Util = require("common.util")
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local ServiceField = require("api.page.servicefield")
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---@class ColorGradientField: ServiceField
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local ColorGradientField = {
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__name = "ColorGradientField",
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GRADIENT_X_OFFSET = 128,
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GRADIENT_WIDTH = 576,
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GRADIENT_STEPS = 32
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}
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---Create a new ColorGradientField instance
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---@param params? ColorGradientField # initial parameters
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---@return ColorGradientField
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function ColorGradientField.new(params)
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params = params or {}
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params.value = params.value or {0, 0, 0, 255}
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return CreateInstance(ColorGradientField, params, ServiceField)
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end
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---@param obj? any # message object for the field
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function ColorGradientField:activate(obj) end
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---@param obj? any # message object for the field
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function ColorGradientField:focus(obj) end
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---@param obj? any # message object for the field
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function ColorGradientField:deactivate(obj) end
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---@param deltaTime number # frametime in seconds
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function ColorGradientField:drawValue(deltaTime)
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local stepW = self.GRADIENT_WIDTH / self.GRADIENT_STEPS
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for i = 0, self.GRADIENT_STEPS - 1 do
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local posX = self.GRADIENT_X_OFFSET + i * stepW
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local colorA = math.ceil(Util.lerp(i, 0, 0, self.GRADIENT_STEPS - 1, self.value[4]))
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gfx.BeginPath()
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gfx.Rect(posX, 0, stepW, self.aabbH)
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gfx.FillColor(self.value[1], self.value[2], self.value[3], colorA)
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gfx.Fill()
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end
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end
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return ColorGradientField
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