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https://github.com/Insality/druid.git
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124 lines
3.2 KiB
Lua
124 lines
3.2 KiB
Lua
local event = require("event.event")
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local helper = require("druid.helper")
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local component = require("druid.component")
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---The component that handles a text to display a seconds timer
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---@class druid.timer: druid.component
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---@field on_tick event fun(context, value) The event triggered when the timer ticks
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---@field on_set_enabled event fun(context, is_on) The event triggered when the timer is enabled
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---@field on_timer_end event fun(context) The event triggered when the timer ends
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---@field node node The node to display the timer
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---@field from number The start time of the timer
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---@field target number The target time of the timer
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---@field value number The current value of the timer
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---@field is_on boolean|nil True if the timer is on
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local M = component.create("timer")
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---@param node node Gui text node
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---@param seconds_from number|nil Start timer value in seconds
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---@param seconds_to number|nil End timer value in seconds
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---@param callback function|nil Function on timer end
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function M:init(node, seconds_from, seconds_to, callback)
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self.node = self:get_node(node)
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seconds_to = math.max(seconds_to or 0, 0)
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self.on_tick = event.create()
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self.on_set_enabled = event.create()
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self.on_timer_end = event.create(callback)
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if seconds_from then
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seconds_from = math.max(seconds_from, 0)
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self:set_to(seconds_from)
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self:set_interval(seconds_from, seconds_to)
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if seconds_to - seconds_from == 0 then
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self:set_state(false)
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self.on_timer_end:trigger(self:get_context(), self)
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end
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end
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return self
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end
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---@private
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function M:update(dt)
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if not self.is_on then
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return
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end
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self.temp = self.temp + dt
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local dist = math.min(1, math.abs(self.value - self.target))
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if self.temp > dist then
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self.temp = self.temp - dist
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self.value = helper.step(self.value, self.target, 1)
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self:set_to(self.value)
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self.on_tick:trigger(self:get_context(), self.value)
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if self.value == self.target then
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self:set_state(false)
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self.on_timer_end:trigger(self:get_context(), self)
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end
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end
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end
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---@private
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function M:on_layout_change()
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self:set_to(self.last_value)
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end
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---Set the timer to a specific value
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---@param set_to number Value in seconds
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---@return druid.timer self Current timer instance
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function M:set_to(set_to)
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self.last_value = set_to
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gui.set_text(self.node, self:_second_string_min(set_to))
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return self
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end
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---Set the timer to a specific value
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---@param is_on boolean|nil Timer enable state
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---@return druid.timer self Current timer instance
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function M:set_state(is_on)
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self.is_on = is_on
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self.on_set_enabled:trigger(self:get_context(), is_on)
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return self
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end
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---Set the timer interval
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---@param from number Start time in seconds
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---@param to number Target time in seconds
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---@return druid.timer self Current timer instance
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function M:set_interval(from, to)
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self.from = from
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self.value = from
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self.temp = 0
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self.target = to
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self:set_state(true)
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self:set_to(from)
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return self
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end
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---@private
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---@param sec number Seconds to convert
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---@return string The formatted time string
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function M:_second_string_min(sec)
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local mins = math.floor(sec / 60)
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local seconds = math.floor(sec - mins * 60)
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return string.format("%.2d:%.2d", mins, seconds)
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end
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return M
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