130 lines
3.8 KiB
Lua
130 lines
3.8 KiB
Lua
-- Checkbox Graphics Element
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local core = require("graphics.core")
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local element = require("graphics.element")
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---@class checkbox_args
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---@field label string checkbox text
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---@field box_fg_bg cpair colors for checkbox
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---@field disable_fg_bg? cpair text colors when disabled
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---@field default? boolean default value
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---@field callback? function function to call on press
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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 auto incremented if omitted
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---@field fg_bg? cpair foreground/background colors
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---@field hidden? boolean true to hide on initial draw
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-- Create a new checkbox control element.
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---@param args checkbox_args
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---@return Checkbox element, element_id id
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return function (args)
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element.assert(type(args.label) == "string", "label is a required field")
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element.assert(type(args.box_fg_bg) == "table", "box_fg_bg is a required field")
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args.can_focus = true
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args.height = 1
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args.width = 2 + string.len(args.label)
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-- create new graphics element base object
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local e = element.new(args --[[@as graphics_args]])
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e.value = args.default == true
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-- show the button state
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local function draw()
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e.w_set_cur(1, 1)
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local fgd, bkg = args.box_fg_bg.fgd, args.box_fg_bg.bkg
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if (not e.enabled) and type(args.disable_fg_bg) == "table" then
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fgd = args.disable_fg_bg.bkg
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bkg = args.disable_fg_bg.fgd
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end
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if e.value then
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-- show as selected
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e.w_set_fgd(bkg)
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e.w_set_bkg(fgd)
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e.w_write("\x88")
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e.w_set_fgd(fgd)
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e.w_set_bkg(e.fg_bg.bkg)
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e.w_write("\x95")
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else
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-- show as unselected
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e.w_set_fgd(e.fg_bg.bkg)
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e.w_set_bkg(bkg)
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e.w_write("\x88")
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e.w_set_fgd(bkg)
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e.w_set_bkg(e.fg_bg.bkg)
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e.w_write("\x95")
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end
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end
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-- write label text
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local function draw_label()
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if e.enabled and e.is_focused() then
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e.w_set_fgd(e.fg_bg.bkg)
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e.w_set_bkg(e.fg_bg.fgd)
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elseif (not e.enabled) and type(args.disable_fg_bg) == "table" then
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e.w_set_fgd(args.disable_fg_bg.fgd)
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e.w_set_bkg(args.disable_fg_bg.bkg)
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else
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e.w_set_fgd(e.fg_bg.fgd)
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e.w_set_bkg(e.fg_bg.bkg)
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end
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e.w_set_cur(3, 1)
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e.w_write(args.label)
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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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function e.handle_mouse(event)
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if e.enabled and core.events.was_clicked(event.type) and e.in_frame_bounds(event.current.x, event.current.y) then
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e.value = not e.value
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draw()
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if type(args.callback) == "function" then args.callback(e.value) end
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end
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end
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-- handle keyboard interaction
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---@param event key_interaction key event
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function e.handle_key(event)
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if event.type == core.events.KEY_CLICK.DOWN then
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if event.key == keys.space or event.key == keys.enter or event.key == keys.numPadEnter then
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e.value = not e.value
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draw()
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if type(args.callback) == "function" then args.callback(e.value) end
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end
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end
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end
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-- set the value
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---@param val boolean new value
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function e.set_value(val)
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e.value = val
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draw()
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end
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-- element redraw
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function e.redraw()
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draw()
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draw_label()
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end
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-- handle focus
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e.on_focused = draw_label
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e.on_unfocused = draw_label
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-- handle enable
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e.on_enabled = e.redraw
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e.on_disabled = e.redraw
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---@class Checkbox:graphics_element
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local Checkbox, id = e.complete(true)
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return Checkbox, id
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end
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