Adding support for UIScreenEdgePanGestureRecognizer via existing on_pan helper

README.md

@@ -440,6 +440,9 @@ view.on_pan(2)  # minimum and maximum fingers required
 view.on_pan(fingers: 2)
 view.on_pan(min_fingers: 2, max_fingers: 3)
 
+# If present, overrides fingers options and instead handles gestures originating at specified screen edges (UIScreenEdgePanGestureRecognizer)
+view.on_pan(edges: [<list>]) #  Some combination of [:left, :right, :top, :bottom, :all]. 
+
 # `on_press` is a continuous event (it uses UILongPressGestureRecognizer), so
 # you need to check the `gesture`:
 view.on_press do |gesture|

lib/ios/sugarcube-constants/symbol.rb

@@ -248,6 +248,12 @@ def cglinejoin
   def uigesturerecognizerstate
     SugarCube.look_in(self, Symbol.uigesturerecognizerstate)
   end
+
+  def uirectedge 
+    SugarCube.look_in(self, Symbol.uirectedge)
+  end
+
+
   alias uigesturestate uigesturerecognizerstate
 
   class << self
@@ -324,6 +330,8 @@ class << self
 
     attr :uigesturerecognizerstate
 
+    attr :uirectedge
+
   end
 
   @uidevice = {
@@ -892,4 +900,15 @@ class << self
     recognized: UIGestureRecognizerStateRecognized,
   }
 
+
+  @uirectedge = {
+    left: UIRectEdgeLeft,
+    right: UIRectEdgeRight,
+    top: UIRectEdgeTop,
+    bottom: UIRectEdgeBottom,
+    none: UIRectEdgeNone,
+    all: UIRectEdgeAll
+  }
+
+
 end

lib/ios/sugarcube-gestures/gestures.rb

@@ -121,28 +121,40 @@ def on_swipe(direction_or_options=nil, &proc)
   #   @option options [Fixnum] :min_fingers Minimum number of fingers for gesture to be recognized
   #   @option options [Fixnum] :max_fingers Maximum number of fingers for gesture to be recognized
   #   @option options [Fixnum] :fingers If min_fingers or max_fingers is not assigned, this will be the default.
+  #   @option options [Array]  :edges Some combination of [:left, :right, :top, :bottom, :all]. If present, overrides fingers options and instead handles gestures originating at specified screen edges.
   def on_pan(fingers_or_options=nil, &proc)
     fingers = nil
+    edge_options = [:none]
     min_fingers = nil
     max_fingers = nil
+    recognizer = nil
 
     if fingers_or_options
       if fingers_or_options.is_a? Hash
         fingers = fingers_or_options[:fingers] || fingers
+        edge_options = fingers_or_options[:edges] || edge_options
         min_fingers = fingers_or_options[:min_fingers] || min_fingers
         max_fingers = fingers_or_options[:max_fingers] || max_fingers
       else
         fingers = fingers_or_options
       end
     end
 
-    # if fingers is assigned, but not min/max, assign it as a default
-    min_fingers ||= fingers
-    max_fingers ||= fingers
-
-    recognizer = UIPanGestureRecognizer.alloc.initWithTarget(self, action:'sugarcube_handle_gesture:')
-    recognizer.maximumNumberOfTouches = min_fingers if min_fingers
-    recognizer.minimumNumberOfTouches = max_fingers if max_fingers
+    if edge_options.uniq == [:none] # full view pan, possibly with finger options
+      # if fingers is assigned, but not min/max, assign it as a default
+      min_fingers ||= fingers
+      max_fingers ||= fingers
+      recognizer = UIPanGestureRecognizer.alloc.initWithTarget(self, action:'sugarcube_handle_gesture:')
+      recognizer.maximumNumberOfTouches = min_fingers if min_fingers
+      recognizer.minimumNumberOfTouches = max_fingers if max_fingers
+    else #edges option, finger options ignored
+      edges = :none.uirectedge
+      edge_options.each do | edge |
+        edges |= (edge.uirectedge || 0)
+      end
+      recognizer = UIScreenEdgePanGestureRecognizer.alloc.initWithTarget(self, action:'sugarcube_handle_gesture:')
+      recognizer.edges = edges
+    end
     sugarcube_add_gesture(proc, recognizer)
   end
 

spec/ios/gestures_spec.rb

@@ -69,14 +69,33 @@
       @view.gestureRecognizers.should.include?(gesture)
     end
 
-    it 'should work with options' do
+    it 'should work with fingers options' do
       gesture = @view.on_pan(min_fingers: 2, max_fingers: 2) do |gesture|
       end
       gesture.should.be.kind_of(UIPanGestureRecognizer)
       gesture.maximumNumberOfTouches.should == 2
       gesture.minimumNumberOfTouches.should == 2
       @view.gestureRecognizers.should.include?(gesture)
     end
+
+    it 'should work with edges option' do 
+      gesture = @view.on_pan(edges: [:top, :left]) do |gesture|
+      end
+      gesture.should.be.kind_of(UIScreenEdgePanGestureRecognizer)
+      gesture.edges.should == (:left.uirectedge + :top.uirectedge)
+      @view.gestureRecognizers.should.include?(gesture)
+    end
+
+    it 'should ignore :none edges option' do 
+      gesture = @view.on_pan(edges: [:none], min_fingers: 2, max_fingers: 2) do |gesture|
+      end
+      gesture.should.be.kind_of(UIPanGestureRecognizer)
+      gesture.maximumNumberOfTouches.should == 2
+      gesture.minimumNumberOfTouches.should == 2
+      @view.gestureRecognizers.should.include?(gesture)
+    end
+
+
   end
 
   describe 'on_press' do