Added text buttons and button groups.

src/ui/textbtn.lua

@@ -0,0 +1,73 @@
+------------------------------------------------------------------------------
+-- Imports
+------------------------------------------------------------------------------
+
+local love       = require 'love'
+local make_class = require 'src.utils.classes'
+local Button     = require 'src.ui.button'
+local Color      = require 'src.utils.color'
+
+
+------------------------------------------------------------------------------
+-- Class definitions
+------------------------------------------------------------------------------
+
+local TextButton = make_class(Button)
+
+
+------------------------------------------------------------------------------
+-- Class methods
+------------------------------------------------------------------------------
+
+function TextButton:_init(text, font, x, y, callback, base_col, sel_color, press_col)
+    Button._init(self, x, y, callback)
+    self.font      = font
+    self.text      = text
+    self.base_col  = base_col  ~= nil and base_col  or Color(255, 255, 255)
+    self.sel_color = sel_color ~= nil and sel_color or Color(215, 0, 0)
+    self.press_col = press_col ~= nil and press_col or Color(99, 99, 139)
+end
+
+
+function TextButton:load()
+    if not self.font:is_loaded() then
+        self.font:load()
+    end
+
+    -- If the label's size has not been computed then do it.
+    if self.w == nil or self.h == nil then self:set_dimensions() end
+end
+
+
+function TextButton:unload()
+    self.font:unload()
+end
+
+
+function TextButton:is_loaded()
+    return self.font:is_loaded() and self.w ~= nil and self.h ~= nil
+end
+
+
+function TextButton:set_dimensions()
+    self.w = self.font:get_width(self.text)
+    self.h = self.font:get_height(self.text)
+end
+
+
+function TextButton:draw()
+    local color = (self.pressed and self.press_col) or ((self.selected and self.sel_color) or self.base_col)
+
+    love.graphics.setColor(color.r, color.g, color.b)
+    self.font:set()
+    love.graphics.print(self.text, self.x, self.y)
+    self.font:unset()
+    love.graphics.setColor()
+end
+
+
+------------------------------------------------------------------------------
+-- Module return
+------------------------------------------------------------------------------
+
+return TextButton