Adds an example controller/view using dynamic text styles

ios/Fonts/Rakefile

@@ -1,4 +1,5 @@
 $:.unshift("/Library/RubyMotion/lib")
+$:.unshift("~/.rubymotion/rubymotion-templates")
 require 'motion/project/template/ios'
 
 Motion::Project::App.setup do |app|

ios/Fonts/app/detail_controller.rb

@@ -12,6 +12,7 @@ def loadView
 
   def viewDidLoad
     navigationItem.title = "Sample Text"
+    navigationItem.rightBarButtonItem = UIBarButtonItem.alloc.initWithBarButtonSystemItem(UIBarButtonSystemItemCompose, target: self, action: :display_font)
   end
 
   def viewWillAppear(animated)
@@ -47,4 +48,10 @@ def sample_text
     After years of iOS work, RubyMotion seems like a thousand kittens playing the piano while sliding down a double-rainbow.
 EOS
   end
+
+  def display_font
+    @dynamic_controller ||= DynamicController.alloc.init
+    @dynamic_controller.selected_font(@font_name)
+    self.navigationController.pushViewController(@dynamic_controller, animated:true)
+  end
 end

ios/Fonts/app/dynamic_controller.rb

@@ -0,0 +1,53 @@
+
+class DynamicController < UIViewController
+
+  TEXT_STYLES = [
+      UIFontTextStyleBody,
+      UIFontTextStyleCallout,
+      UIFontTextStyleCaption1,
+      UIFontTextStyleCaption2,
+      UIFontTextStyleFootnote,
+      UIFontTextStyleHeadline,
+      UIFontTextStyleSubheadline,
+      UIFontTextStyleLargeTitle,
+      UIFontTextStyleTitle1,
+      UIFontTextStyleTitle2,
+      UIFontTextStyleTitle3,
+  ]
+
+  def loadView
+    self.view = UIScrollView.alloc.initWithFrame(UIScreen.mainScreen.applicationFrame)
+    view.backgroundColor = UIColor.whiteColor
+    @labels = TEXT_STYLES.map do |style|
+      label = UILabel.alloc.init
+      view.addSubview(label)
+      {:label => label, :style => style, size: UIFont.preferredFontForTextStyle(style).pointSize}
+    end
+  end
+
+  def viewDidLoad
+    navigationItem.title = "Dynamic Text - #{@font_name}"
+  end
+
+  def viewWillAppear(_)
+
+    top = 100
+    @labels.each do |label_style|
+      metrics = UIFontMetrics.metricsForTextStyle(label_style[:style])
+      label_style[:label].font = metrics.scaledFontForFont(UIFont.fontWithName(@font_name, size: label_style[:size]))
+      label_style[:label].text = label_style[:style]
+      label_style[:label].adjustsFontForContentSizeCategory = true
+
+      label_style[:label].frame = [
+          [10, top], [
+          view.frame.size.width - 20, label_style[:label].font.pointSize + 5]
+      ]
+      top += label_style[:label].font.pointSize + 20
+    end
+  end
+
+  def selected_font(font_name)
+    @font_name = font_name
+  end
+
+end