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https://github.com/MikaylaFischler/cc-mek-scada.git
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111 lines
3.4 KiB
Lua
111 lines
3.4 KiB
Lua
-- Button Graphics Element
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local tcd = require("scada-common.tcallbackdsp")
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local core = require("graphics.core")
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local element = require("graphics.element")
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---@class push_button_args
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---@field text string button text
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---@field callback function function to call on touch
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---@field min_width? integer text length if omitted
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---@field active_fg_bg? cpair foreground/background colors when pressed
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---@field dis_fg_bg? cpair foreground/background colors when disabled
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---@field parent graphics_element
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---@field id? string element id
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---@field x? integer 1 if omitted
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---@field y? integer 1 if omitted
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---@field height? integer parent height if omitted
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---@field fg_bg? cpair foreground/background colors
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-- new push button
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---@param args push_button_args
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---@return graphics_element element, element_id id
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local function push_button(args)
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assert(type(args.text) == "string", "graphics.elements.controls.push_button: text is a required field")
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assert(type(args.callback) == "function", "graphics.elements.controls.push_button: callback is a required field")
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local text_width = string.len(args.text)
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-- single line height, calculate width
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args.height = 1
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args.min_width = args.min_width or 0
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args.width = math.max(text_width, args.min_width)
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-- create new graphics element base object
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local e = element.new(args)
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local h_pad = math.floor((e.frame.w - text_width) / 2) + 1
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local v_pad = math.floor(e.frame.h / 2) + 1
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-- draw the button
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local function draw()
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e.window.clear()
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-- write the button text
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e.window.setCursorPos(h_pad, v_pad)
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e.window.write(args.text)
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end
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-- handle mouse interaction
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---@param event mouse_interaction mouse event
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---@diagnostic disable-next-line: unused-local
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function e.handle_mouse(event)
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if e.enabled then
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if args.active_fg_bg ~= nil then
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-- show as pressed
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e.value = true
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e.window.setTextColor(args.active_fg_bg.fgd)
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e.window.setBackgroundColor(args.active_fg_bg.bkg)
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draw()
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-- show as unpressed in 0.25 seconds
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tcd.dispatch(0.25, function ()
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e.value = false
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if e.enabled then
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e.window.setTextColor(e.fg_bg.fgd)
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e.window.setBackgroundColor(e.fg_bg.bkg)
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end
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draw()
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end)
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end
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-- call the touch callback
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args.callback()
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end
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end
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-- set the value (true simulates pressing the button)
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---@param val boolean new value
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function e.set_value(val)
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if val then e.handle_mouse(core.events.mouse_generic("", core.events.click_type.VIRTUAL, 1, 1)) end
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end
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-- show butten as enabled
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function e.enable()
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if args.dis_fg_bg ~= nil then
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e.value = false
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e.window.setTextColor(e.fg_bg.fgd)
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e.window.setBackgroundColor(e.fg_bg.bkg)
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draw()
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end
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end
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-- show button as disabled
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function e.disable()
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if args.dis_fg_bg ~= nil then
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e.value = false
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e.window.setTextColor(args.dis_fg_bg.fgd)
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e.window.setBackgroundColor(args.dis_fg_bg.bkg)
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draw()
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end
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end
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-- initial draw
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draw()
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return e.get()
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end
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return push_button
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