progress_bar as own lib

src/lib/progress_bar.lua

@@ -0,0 +1,36 @@
+local progress_bar_metatable = {
+  __index = {
+    font = love.graphics.newFont(18), -- TODO customizable
+    set_progress = function(self, progress_percentage)
+      self.progress_percentage = progress_percentage
+    end,
+    set_text = function(self, new_text)
+      self.text = new_text
+    end,
+    draw = function(self)
+      local cyan = {0, 0.5, 0.5, 1} -- TODO make customizable; consider percentage range colors
+      love.graphics.setColor(cyan)
+      love.graphics.rectangle("fill", self.x_position, self.y_position, self.total_width * self.progress_percentage, self.total_height)
+
+      local text_color = {1, 1, 1, 1} -- TODO customizable; default auto contrast with background color
+      love.graphics.setColor(text_color)
+
+      if self.text then
+        local font_height = self.font:getHeight()
+        local buffer_width = 8 -- TODO this should not be hardcoded
+        love.graphics.setFont(self.font)
+        love.graphics.print(self.text, self.x_position + buffer_width, self.y_position + self.total_height / 2 - font_height / 2)
+      end
+    end,
+  }
+}
+
+return function(x_position, y_position, total_width, total_height, progress_percentage)
+  return setmetatable({
+    x_position = x_position,
+    y_position = y_position,
+    total_width = total_width,
+    total_height = total_height,
+    progress_percentage = progress_percentage or 0,
+  }, progress_bar_metatable)
+end