From 54802e1254cde535db86fcf393ab4c49e096503b Mon Sep 17 00:00:00 2001
From: Cyberarm <matthewlikesrobots@gmail.com>
Date: Thu, 2 Dec 2021 08:15:39 -0600
Subject: [PATCH] Added support 'marquee' style progress bars i.e. non-linear
 progress bar with scrolling bar

---
 lib/cyberarm_engine/ui/elements/progress.rb | 41 ++++++++++++++++++++-
 1 file changed, 39 insertions(+), 2 deletions(-)

diff --git a/lib/cyberarm_engine/ui/elements/progress.rb b/lib/cyberarm_engine/ui/elements/progress.rb
index b566552..34114cc 100644
--- a/lib/cyberarm_engine/ui/elements/progress.rb
+++ b/lib/cyberarm_engine/ui/elements/progress.rb
@@ -1,9 +1,16 @@
 module CyberarmEngine
   class Element
     class Progress < Element
+      attr_reader :type
+
       def initialize(options = {}, block = nil)
         super(options, block)
 
+        @animation_speed = options[:animation_speed] || 3_000
+        @marquee_width = options[:marquee_width] || 0.25
+        @marquee_offset = 0
+        @marquee_animation_time = Gosu.milliseconds
+        @type = options[:type] || :linear
         @fraction_background = Background.new(background: @style.fraction_background)
         self.value = options[:fraction] || 0.0
       end
@@ -24,15 +31,45 @@ module CyberarmEngine
       def update_background
         super
 
-        @fraction_background.x = @style.border_thickness_left + @style.padding_left + @x
+        @fraction_background.x = (@style.border_thickness_left + @style.padding_left + @x) + @marquee_offset
         @fraction_background.y = @style.border_thickness_top + @style.padding_top + @y
         @fraction_background.z = @z
-        @fraction_background.width = @width * @fraction
+        @fraction_background.width = @width * (@type == :marquee ? @marquee_width : @fraction)
         @fraction_background.height = @height
 
         @fraction_background.background = @style.fraction_background
       end
 
+      def update
+        super
+
+        return unless @type == :marquee
+
+        marquee_width = @width * @marquee_width
+        range = @width + marquee_width
+
+        @marquee_offset = (@width * (Gosu.milliseconds - @marquee_animation_time) / @animation_speed) - marquee_width
+        @marquee_animation_time = Gosu.milliseconds if @marquee_offset > range
+
+        update_background
+      end
+
+      def type=(type)
+        @type = type
+
+        case type
+        when :linear
+          @marquee_offset = 0
+        when :marquee
+          @marquee_offset = 0
+          @marquee_animation_time = Gosu.milliseconds
+        else
+          raise ArgumentError, "Only types :linear and :marquee are supported"
+        end
+
+        update_background
+      end
+
       def value
         @fraction
       end