Added selectable gui elements

ui.rb

@@ -8,12 +8,19 @@ class UI
   # Setup for the UI
   # @param width [Integer] Width of screen in pixels
   # @param height [Integer] Height of the screen in pixels
-  def initialize(width, height)
+  def initialize(parent, width, height)
+    @parent = parent
     @width = width
     @height = height
     @tool_selector = []
     @toolbar_width = width / 2
     @toolbar_height = height / 9
+    @tool_info = [
+      ['extractor', 96],
+      ['belt', 32],
+      ['adder', 64],
+      ['delete', 32],
+    ]
     @tool_selector_image = Gosu.render(@toolbar_width, @toolbar_height) {
       Gosu.draw_rect(
         0,
@@ -22,15 +29,48 @@ class UI
         @toolbar_height,
         Gosu::Color.new(0xC0, 0xFF, 0xFF, 0xFF),
         0)
-      Gosu::Image.from_text('tool selector', TEXT_SIZE, font: FONT_PATH).draw(TEXT_MARGIN, TEXT_MARGIN)
+      # Loop through the tools:
+      @tool_info.each_with_index do |path, idx|
+        Gosu::Image.new("assets/images/#{path[0]}.png").draw(
+          idx * (@toolbar_height + 2),
+          2,
+          0,
+          (@toolbar_height / path[1].to_f),
+          (@toolbar_height / path[1].to_f),
+        )
+      end
+      
     }
     @x = (@width / 2) - (@toolbar_width / 2)
     @y = @height - @toolbar_height
-
+    @mouse_down_last_update = false
   end
 
   def update(mouse_x, mouse_y)
-    false
+    managed = false
+    # Only check if we are clicking
+    if Gosu.button_down?(Gosu::MS_LEFT)
+      if !@mouse_down_last_update
+        puts 'mouse clicked'
+        @mouse_down_last_update = true
+        # Check if we are in the right y area:
+        if mouse_y > @y
+          # Check if we are within the right zone
+          mouse_x_inset = mouse_x - @x
+          if 0 < mouse_x_inset && mouse_x_inset < @toolbar_width
+            managed = true
+            item_index = mouse_x_inset / (@toolbar_height + 2)
+            if item_index < @tool_info.length
+              @parent.current_tool = @tool_info[item_index][0]
+              puts "Selected item!"
+            end
+          end
+        end
+      end
+    else
+      @mouse_down_last_update = false
+    end
+    return managed
   end
 
   def draw()