Add shapes colors palette example

examples/README.md

@@ -76,4 +76,5 @@ Examples using raylib shapes drawing functionality.
 |----|----------------------------------------------------------|--------|:-------------------:|:------------------:|:------------------:|:----------|
 | 31 | [shapes_basic_shapes](shapes/shapes_basic_shapes.rb)     | <img src="shapes/shapes_basic_shapes.png" alt="shapes_basic_shapes" width="80"> | ⭐️☆☆☆ | 1.0 | **4.0** | [Ray](https://github.com/raysan5) |
 | 32 | [shapes_bouncing_ball](shapes/shapes_bouncing_ball.rb)   | <img src="shapes/shapes_bouncing_ball.png" alt="shapes_bouncing_ball" width="80"> | ⭐️☆☆☆ | 2.5 | 2.5 | [Ray](https://github.com/raysan5) |
+| 33 | [shapes_colors_palette](shapes/shapes_colors_palette.rb) | <img src="shapes/shapes_colors_palette.png" alt="shapes_colors_palette" width="80"> | ⭐️⭐️☆☆ | 1.0 | 2.5 | [Ray](https://github.com/raysan5) |
 | 38 | [shapes_collision_area](shapes/shapes_collision_area.rb) | <img src="shapes/shapes_collision_area.png" alt="shapes_collision_area" width="80"> | ⭐️⭐️☆☆ | 2.5 | 2.5 | [Ray](https://github.com/raysan5) |

examples/shapes/shapes_colors_palette.rb

@@ -0,0 +1,98 @@
+# ******************************************************************************************
+#
+#   raylib [shapes] example - Colors palette
+#
+#   Example originally created with raylib 1.0, last time updated with raylib 2.5
+#
+#   Example ported to Ruby by Wilson Silva (@wilsonsilva). Works with Raylib 4.5
+#
+#   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+#   BSD-like license that allows static linking with closed source software
+#
+#   Copyright (c) 2014-2023 Ramon Santamaria (@raysan5)
+#
+# ******************************************************************************************
+
+require 'bundler/setup'
+require 'raylib'
+
+# Initialization
+# --------------------------------------------------------------------------------------
+SCREEN_WIDTH = 800
+SCREEN_HEIGHT = 450
+
+Raylib.init_window(SCREEN_WIDTH, SCREEN_HEIGHT, 'raylib [shapes] example - colors palette')
+
+MAX_COLORS_COUNT = 21 # Number of colors available
+
+colors = [
+  Raylib::DARKGRAY, Raylib::MAROON, Raylib::ORANGE, Raylib::DARKGREEN, Raylib::DARKBLUE, Raylib::DARKPURPLE,
+  Raylib::DARKBROWN, Raylib::GRAY, Raylib::RED, Raylib::GOLD, Raylib::LIME, Raylib::BLUE, Raylib::VIOLET, Raylib::BROWN,
+  Raylib::LIGHTGRAY, Raylib::PINK, Raylib::YELLOW, Raylib::GREEN, Raylib::SKYBLUE, Raylib::PURPLE, Raylib::BEIGE
+]
+
+COLOR_NAMES = %w[
+  DARKGRAY MAROON ORANGE DARKGREEN DARKBLUE DARKPURPLE DARKBROWN GRAY RED GOLD LIME
+  BLUE VIOLET BROWN LIGHTGRAY PINK YELLOW GREEN SKYBLUE PURPLE BEIGE
+].freeze
+
+colors_recs = Array.new(MAX_COLORS_COUNT) do |i|
+  Raylib::Rectangle.create(
+    20.0 + 100.0 * (i % 7) + 10.0 * (i % 7),
+    80.0 + 100.0 * (i / 7) + 10.0 * (i / 7),
+    100.0,
+    100.0
+  )
+end
+
+color_state = Array.new(MAX_COLORS_COUNT, 0) # Color state: 0-DEFAULT, 1-MOUSE_HOVER
+
+Raylib.set_target_fps(60) # Set our game to run at 60 frames-per-second
+# --------------------------------------------------------------------------------------
+
+# Main game loop
+until Raylib.window_should_close # Detect window close button or ESC key
+  # Update
+  # ----------------------------------------------------------------------------------
+  mouse_point = Raylib.get_mouse_position
+
+  MAX_COLORS_COUNT.times do |i|
+    color_state[i] = Raylib.check_collision_point_rec(mouse_point, colors_recs[i]) ? 1 : 0
+  end
+  # ----------------------------------------------------------------------------------
+
+  # Draw
+  # ----------------------------------------------------------------------------------
+  Raylib.begin_drawing
+  Raylib.clear_background(Raylib::RAYWHITE)
+  Raylib.draw_text('raylib colors palette', 28, 42, 20, Raylib::BLACK)
+  Raylib.draw_text(
+    'press SPACE to see all colors',
+    Raylib.get_screen_width - 180,
+    Raylib.get_screen_height - 40, 10, Raylib::GRAY
+  )
+
+  MAX_COLORS_COUNT.times do |i| # Draw all rectangles
+    Raylib.draw_rectangle_rec(colors_recs[i], Raylib.fade(colors[i], color_state[i] == 1 ? 0.6 : 1.0))
+
+    if Raylib.is_key_down(Raylib::KEY_SPACE) || color_state[i] == 1
+      Raylib.draw_rectangle(
+        colors_recs[i].x, colors_recs[i].y + colors_recs[i].height - 26,
+        colors_recs[i].width, 20, Raylib::BLACK
+      )
+      Raylib.draw_rectangle_lines_ex(colors_recs[i], 6, Raylib.fade(Raylib::BLACK, 0.3))
+      Raylib.draw_text(
+        COLOR_NAMES[i], colors_recs[i].x + colors_recs[i].width - Raylib.measure_text(COLOR_NAMES[i], 10) - 12,
+        colors_recs[i].y + colors_recs[i].height - 20, 10, colors[i]
+      )
+    end
+  end
+
+  Raylib.end_drawing
+  # ----------------------------------------------------------------------------------
+end
+
+# De-Initialization
+# --------------------------------------------------------------------------------------
+Raylib.close_window # Close window and OpenGL context
+# --------------------------------------------------------------------------------------