Documentation and example of autoscaling

lib/squib/api/text.rb

@@ -19,6 +19,7 @@ module Squib
     #   For the official documentation, see the [Pango docs](http://ruby-gnome2.sourceforge.jp/hiki.cgi?Pango%3A%3AFontDescription#style). 
     #   This [description](http://www.pygtk.org/pygtk2reference/class-pangofontdescription.html) is also quite good.
     #   See the {file:samples/text-options.rb samples/text.rb} as well.
+    # @option opts font_size [Integer] (nil) an override of font string description, for scaling the font according to the size of the string
     # @option opts x [Integer] (0) the x-coordinate to place
     # @option opts y [Integer] (0) the y-coordinate to place
     # @option opts color [String] (:black) the color the font will render to. See {file:README.md#Specifying_Colors Specifying Colors}

samples/autoscale_font.rb

@@ -0,0 +1,27 @@
+require 'squib'
+
+# Here's an exmaple of being able to scale a font 
+# based on the length of individual string. 
+# Handy for making minor font scales to fill text boxes.
+def autoscale(str_array)
+  str_array.inject([]) do | memo, str |
+    case str.length
+    when 0..10
+      memo << 125
+    when 11..20
+      memo << 45
+    else
+      memo << 36
+    end
+  end
+end
+
+Squib::Deck.new(cards: 3) do
+  background color: :white
+
+  title = %w(ShortBig Medium_Length_Name Super_Duper_Long_Name)
+  text str: title, x: 65, y: 400, align: :center, width: 700,
+       font: 'Arial', font_size: autoscale(title), hint: :red 
+
+  save prefix: 'autoscale_', format: :png
+end