yui/checkbox.lua

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2022-09-12 09:34:46 +02:00
--- Implements a checkbox widget with a binary tick selection
--
-- @classmod yui.Checkbox
-- @copyright 2022, The DoubleFourteen Code Forge
-- @author Lorenzo Cogotti, Andrea Pasquini
--
--- Checkbox widget receives the following callbacks: @{yui.Widget.WidgetCallbacks|onEnter}(), @{yui.Widget.WidgetCallbacks|onChange}(), @{yui.Widget.WidgetCallbacks|onLeave}().
local BASE = (...):gsub('checkbox$', '')
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local Widget = require(BASE..'widget')
local core = require(BASE..'core')
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local shadowtext = require 'lib.gear.shadowtext'
local T = require('lib.moonspeak').translate
local Checkbox = setmetatable({}, Widget)
Checkbox.__index = Checkbox
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--- Attributes accepted by the @{Checkbox} widget beyond the standard @{yui.Widget.WidgetAttributes|attributes}
-- and @{yui.Widget.WidgetCallbacks|callbacks}.
--
-- @field checked (boolean) to set it checked by default
-- @field text (string) text displayed inside the Checkbox
-- @field[opt='center'] valign (string) vertical alignment 'top', 'bottom', 'center'
-- @field[opt='center'] align (string) horizontal alignment, 'left', 'center', 'right'
-- @field cornerRadius (number) radius for rounded corners
-- @field notranslate (boolean) don't translate text
-- @table CheckboxAttributes
--- Checkbox constructor
-- @param args (@{CheckboxAttributes}) widget attributes
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function Checkbox.new(args)
local self = setmetatable(args, Checkbox)
self.text = self.text or ""
self.text = self.notranslate and self.text or T(self.text)
self.align = self.align or 'left'
self.valign = self.valign or 'center'
self.color = self.color or core.theme.color
self.cornerRadius = self.cornerRadius or core.theme.cornerRadius
self.checked = self.checked or false
return self
end
function Checkbox:onPointerInput(px,py, clicked)
self:grabFocus()
if clicked then
self.checked = not self.checked
self:onChange(self.checked)
end
end
function Checkbox:onActionInput(action)
if action.confirm then
self.checked = not self.checked
self:onChange(self.checked)
end
end
function Checkbox:draw()
local x,y,w,h = self.x,self.y,self.w,self.h
local c = self:colorForState()
local font = self.font or love.graphics.getFont()
-- Draw checkbox
core.drawBox(x+h/10,y+h/10,h*.8,h*.8, c, self.cornerRadius)
love.graphics.setColor(c.fg)
if self.checked then
love.graphics.setLineStyle('smooth')
love.graphics.setLineWidth(5)
love.graphics.setLineJoin('bevel')
love.graphics.line(x+h*.2,y+h*.55, x+h*.45,y+h*.75, x+h*.8,y+h*.2)
end
-- Most of the times checkboxes have no text, so test for performance
if self.text ~= "" then
love.graphics.setFont(font)
y = y + core.verticalOffsetForAlign(self.valign, font, self.h)
shadowtext.printf(self.text, x + h, y, w - h, self.align)
end
end
return Checkbox