--- Implements a clickable button widget -- -- @classmod yui.Button -- @copyright 2022, The DoubleFourteen Code Forge -- @author Lorenzo Cogotti, Andrea Pasquini -- -- --- Button widget receives the following callbacks: @{yui.Widget.WidgetCallbacks|onEnter}(), @{yui.Widget.WidgetCallbacks|onHit}(), @{yui.Widget.WidgetCallbacks|onLeave}(). local BASE = (...):gsub('button$', '') local Widget = require(BASE..'widget') local core = require(BASE..'core') local shadowtext = require 'lib.gear.shadowtext' local T = require('lib.moonspeak').translate local Button = setmetatable({}, Widget) Button.__index = Button --- Attributes accepted by the @{Button} widget beyond the standard @{yui.Widget.WidgetAttributes|attributes} -- and @{yui.Widget.WidgetCallbacks|callbacks}. -- -- and @{yui.Widget.WidgetCallbacks|callbacks}. -- @field text (string) text displayed inside the button -- @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 ButtonAttributes --- Button constructor -- @param args (@{ButtonAttributes}) widget attributes function Button.new(args) local self = setmetatable(args, Button) self.text = self.text or "" self.align = self.align or 'center' self.valign = self.valign or 'center' self.color = self.color or core.theme.color self.cornerRadius = self.cornerRadius or core.theme.cornerRadius self.active = false if not self.notranslate then self.text = T(self.text) end return self end local function hit(button) if not button.active then button.active = true button:onHit() button.ui.timer:after(0.15, function() button.active = false end) end end function Button:onPointerInput(px,py, clicked) self:grabFocus() if clicked then hit(self) end end function Button:onActionInput(action) if action.confirm then hit(self) end end function Button:draw() local x,y,w,h = self.x,self.y,self.w,self.h local font = self.font or love.graphics.getFont() local c = self:colorForState() core.drawBox(x,y,w,h, c, self.cornerRadius) love.graphics.setColor(c.fg) love.graphics.setFont(font) y = y + core.verticalOffsetForAlign(self.valign, font, h) shadowtext.printf(self.text, x+2, y, w-4, self.align) end return Button