Initial commit

1 files changed, 202 insertions, 0 deletions

diff --git a/lib/menu.rb b/lib/menu.rb
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+++ b/lib/menu.rb
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+# Copyright 2021 Frederico de Oliveira Linhares
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+module CandyGear
+  class Menu
+    class BorderlessView
+      attr_reader(:texture, :font, :text_color, :bg_color, :sprites);
+
+      def initialize(
+            texture, font, text_color, bg_color, sprite_width, sprite_height)
+        @texture = texture;
+        @font = font;
+        @text_color = text_color;
+        @bg_color = bg_color;
+        @sprite_width = sprite_width;
+        @sprite_height = sprite_height;
+
+        @sprites = {};
+        @sprites[:arrow_select] = Sprite.new(
+          @texture, 1 * @sprite_width, 1 * @sprite_height,
+          @sprite_width, @sprite_height);
+      end
+
+      def draw(x, y, width, height)
+        # Nothing.
+      end
+
+      def border_width() = 0;
+      def border_height() = 0;
+    end
+
+    class BorderedView
+      attr_reader(
+        :texture, :font, :text_color, :bg_color, :sprites, :border_width,
+        :border_height);
+
+      def initialize(
+            texture, font, text_color, bg_color, sprite_width, sprite_height)
+        @texture = texture;
+        @font = font;
+        @text_color = text_color;
+        @bg_color = bg_color;
+        @border_width = sprite_width;
+        @border_height = sprite_height;
+
+        @sprites = {};
+        @sprites[:arrow_select] = Sprite.new(
+          @texture, 1 * @border_width, 1 * @border_height,
+          @border_width, @border_height);
+        @sprites[:box_top_left] = Sprite.new(
+          @texture, 0, 0, @border_width, @border_height);
+        @sprites[:box_top] = Sprite.new(
+          @texture, 1 * @border_width, 0,
+          @border_width, @border_height);
+        @sprites[:box_top_right] = Sprite.new(
+          @texture, 2 * @border_height, 0,
+          @border_width, @border_height);
+        @sprites[:box_left] = Sprite.new(
+          @texture, 0, 1 * @border_height,
+          @border_width, @border_height);
+        @sprites[:box_right] = Sprite.new(
+          @texture, 2 * @border_width, 1 * @border_height,
+          @border_width, @border_height);
+        @sprites[:box_bottom_left] = Sprite.new(
+          @texture, 0, 2 * @border_height,
+          @border_width, @border_height);
+        @sprites[:box_bottom] = Sprite.new(
+          @texture, 1 * @border_width, 2 * @border_height,
+          @border_width, @border_height);
+        @sprites[:box_bottom_right] = Sprite.new(
+          @texture, 2 * @border_width, 2 * @border_height,
+          @border_width, @border_height);
+      end
+
+      def draw(x, y, width, height)
+        num_horizontal_sprites = width / @border_width + 1;
+        num_horizontal_sprites += 1 if width % @border_width > 0;
+        num_vertical_sprites = height / @border_height;
+        num_vertical_sprites += 1 if height % @border_height > 0;
+        background = Rect.new(
+          x, y,
+          (num_horizontal_sprites + 2) * @border_width,
+          (num_vertical_sprites + 2) * @border_height);
+
+        Graphic.set_color(@bg_color);
+        background.draw_fill();
+
+        # Draw the corners.
+        @sprites[:box_top_left].draw_xy(x, y);
+        @sprites[:box_top_right].draw_xy(
+          @border_width * (num_horizontal_sprites + 1) + x, y);
+        @sprites[:box_bottom_left].draw_xy(
+          x, @border_height * (num_vertical_sprites + 1) + y);
+        @sprites[:box_bottom_right].draw_xy(
+          @border_width * (num_horizontal_sprites + 1) + x,
+          @border_height * (num_vertical_sprites + 1) + y);
+
+        # Draw the edges.
+        num_horizontal_sprites.times do |i|
+          # Top
+          @sprites[:box_top].draw_xy(@border_width * (i + 1) + x, y);
+          # Bottom
+          @sprites[:box_bottom].draw_xy(
+            @border_width * (i + 1) + x,
+            @border_height * (num_vertical_sprites + 1) + y);
+        end
+        num_vertical_sprites.times do |i|
+          # Left
+          @sprites[:box_left].draw_xy(x, @border_height * (i + 1) + y);
+          # Right
+          @sprites[:box_right].draw_xy(
+            @border_width * (num_horizontal_sprites + 1) + x,
+            @border_height * (i + 1) + y);
+        end
+      end
+    end
+
+    class Option
+      attr_reader(:action, :text);
+
+      def initialize(text, action);
+        @text = text;
+        @action = action;
+      end
+    end
+
+    attr_reader(:width, :height);
+
+    def initialize(view, pos_x, pos_y, options)
+      @view = view;
+
+      @pos_x = pos_x;
+      @pos_y = pos_y;
+
+      @options = options.map do |opt|
+        Option.new(
+          Texture.from_text(
+            opt[:text], view.font, view.text_color, view.bg_color),
+          opt[:action]);
+      end
+      @current_option = 0;
+      @option_max_width = 0;
+      @option_max_height = 0;
+
+      @options.each do |i|
+        if @option_max_width < i.text.width then
+          @option_max_width = i.text.width;
+        end
+        if @option_max_height < i.text.height then
+          @option_max_height = i.text.height;
+        end
+      end
+
+      @width = @option_max_width;
+      @height = @option_max_height * @options.size;
+    end
+
+    def next_opt()
+      @current_option += 1;
+      @current_option = 0 if @current_option >= @options.size();
+    end
+
+    def pred_opt()
+      if @current_option <= 0 then
+        @current_option = @options.size - 1;
+      else
+        @current_option -= 1;
+      end
+    end
+
+    def activate()
+      @options[@current_option].action.call();
+    end
+
+    def draw()
+      @view.draw(@pos_x, @pos_y, @width, @height);
+
+      @options.each_with_index do |opt, i|
+        opt.text.draw_xy(
+          @pos_x + @view.border_width + @view.sprites[:arrow_select].width,
+          @pos_y + @view.border_height +
+          @option_max_height * i);
+      end
+
+      @view.sprites[:arrow_select].draw_xy(
+          @pos_x + @view.border_width,
+          @pos_y + @view.border_height +
+          @option_max_height * @current_option);
+    end
+  end
+end