got directionality working on the RGraph type

app/assets/javascripts/Jit/RGraph/metamapRG.js

@@ -65,6 +65,46 @@ function initRG(){
 		  }
 	  }
   });
+    //implement an edge type  
+$jit.RGraph.Plot.EdgeTypes.implement({  
+  'customEdge': {  
+    'render': function(adj, canvas) {  
+	  //get nodes cartesian coordinates 
+	  var pos = adj.nodeFrom.pos.getc(true); 
+	  var posChild = adj.nodeTo.pos.getc(true);
+	  
+	  var direction = adj.getData("category");
+	  //label placement on edges 
+	  //plot arrow edge 
+	  if (direction == "none") {
+		    this.edgeHelper.line.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, canvas);
+	  }
+	  else if (direction == "both") {
+	  		this.edgeHelper.arrow.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 40, false, canvas);
+	    	this.edgeHelper.arrow.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 40, true, canvas);
+	  }
+	  else if (direction == "from-to") {
+		    this.edgeHelper.arrow.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 40, false, canvas);
+	  }
+	  else if (direction == "to-from") {
+		    this.edgeHelper.arrow.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 40, true, canvas);
+	  }
+	   
+	  //check for edge label in data  
+	  var desc = adj.getData("desc");
+	  var showDesc = adj.getData("showDesc");
+	  if( desc != "" && showDesc ) { 
+		 //now adjust the label placement 
+		var radius = canvas.getSize(); 
+		var x = parseInt((pos.x + posChild.x - (desc.length * 5)) /2); 
+		var y = parseInt((pos.y + posChild.y) /2); 
+		canvas.getCtx().fillStyle = '#000';
+		canvas.getCtx().font = 'bold 14px arial';
+		canvas.getCtx().fillText(desc, x, y); 
+      }
+	}  
+  }  
+});
   // end
   // init RGraph
     rg = new $jit.RGraph({
@@ -101,7 +141,8 @@ function initRG(){
     Edge: {
       overridable: true,
       color: '#222222',
-      lineWidth: 0.5
+	  type: 'customEdge',
+      lineWidth: 1
     },
     //Native canvas text styling
     Label: {
@@ -152,9 +193,10 @@ function initRG(){
 			n.setData('dim', 25, 'end');  
 			n.eachAdjacency(function(adj) {  
 			  adj.setDataset('end', {  
-				lineWidth: 0.5,  
-				color: '#222222'  
-			  });  
+				lineWidth: 1,  
+				color: '#222222'
+			  }); 
+			  adj.setData('showDesc', false, 'current'); 
 			});  
 		  });  
 		  if(!node.selected) {  
@@ -164,7 +206,8 @@ function initRG(){
 			  adj.setDataset('end', {  
 				lineWidth: 3,  
 				color: '#FFF'  
-			  });  
+			  }); 
+			  adj.setData('showDesc', true, 'current'); 
 			});  
 		  } else {  
 			delete node.selected;  

app/controllers/synapses_controller.rb

@@ -54,7 +54,7 @@ class SynapsesController < ApplicationController
     @user = current_user
 	@synapse = Synapse.new()
 	@synapse.desc = params[:synapse][:desc]
-	@synapse.category = params[:category]
+	@synapse.category = params[:synapse][:category]
 	@synapse.item1 = Item.find(params[:node1_id])
 	@synapse.item2 = Item.find(params[:node2_id])
 	@synapse.permission = params[:synapse][:permission]
@@ -102,7 +102,7 @@ class SynapsesController < ApplicationController
 	@synapse = @user.synapses.find(params[:id]).authorize_to_edit(@current)
 	
 	if @synapse 
-		@items = Item.visibleToUser(@current)
+		@items = Item.visibleToUser(@current, nil)
 	elsif not @synapse
 		redirect_to root_url and return
 	end
@@ -118,6 +118,7 @@ class SynapsesController < ApplicationController
     
 	if @synapse 
 		@synapse.desc = params[:synapse][:desc]
+		@synapse.category = params[:synapse][:category]
 		@synapse.item1 = Item.find(params[:node1_id][:node1])
 		@synapse.item2 = Item.find(params[:node2_id][:node2])
 	    @synapse.permission = params[:synapse][:permission]

app/models/item.rb

@@ -62,6 +62,7 @@ belongs_to :item_category
 					
 					@synapsedata = Hash.new
 					@synapsedata['$desc'] = synapse.desc
+					@synapsedata['$showDesc'] = false
 					@synapsedata['$category'] = synapse.category
 					@synapsedata['$userid'] = synapse.user.id
 					@synapsedata['$username'] = synapse.user.name

app/models/map.rb

@@ -30,6 +30,7 @@ end
 				
 				@synapsedata = Hash.new
 				@synapsedata['$desc'] = synapse.desc
+				@synapsedata['$showDesc'] = false
 				@synapsedata['$category'] = synapse.category
 				@synapsedata['$userid'] = synapse.user.id
 				@synapsedata['$username'] = synapse.user.name

app/models/synapse.rb

@@ -14,6 +14,7 @@ has_many :maps, :through => :mappings
 	Jbuilder.encode do |json|			
 		@synapsedata = Hash.new
 		@synapsedata['$desc'] = self.desc
+		@synapsedata['$showDesc'] = false
 		@synapsedata['$category'] = self.category
 		@synapsedata['$userid'] = synapse.user.id
 		@synapsedata['$username'] = synapse.user.name
@@ -34,6 +35,7 @@ has_many :maps, :through => :mappings
 				
 				@synapsedata = Hash.new
 				@synapsedata['$desc'] = synapse.desc
+				@synapsedata['$showDesc'] = false
 				@synapsedata['$category'] = synapse.category
 				@synapsedata['$userid'] = synapse.user.id
 				@synapsedata['$username'] = synapse.user.name

app/views/maps/_newsynapse.html.erb

@@ -2,15 +2,16 @@
 	<%= form_for Synapse.new, url: user_synapses_url(user), remote: true do |form| %>
 	  <button id="closenewsynapse" onclick="$('#new_synapse').fadeOut('fast'); $('#new_synapse')[0].reset(); return false;">close</button>
 	  <h3>Add Synapse Between Topics</h3> 
-	  <%= hidden_field_tag(:category, "Item") %>  
 	  <% if Item.visibleToUser(user, nil).count > 0 %>
-		<label for="node1_id">Choose First Item</label>
+		<label for="node1_id">Choose First Topic</label>
 		<%= select_tag :node1_id, options_from_collection_for_select(Item.order("name ASC").visibleToUser(user, nil), "id", "name") %>
 	  <% end %>
+	  <label for="item_category">Directionality of the Connection</label>
+	  <%= form.select :category, options_for_select(['none', 'both', 'from-to', 'to-from']) %>
 	  <label for="item_desc">Describe The Connection</label>
 	  <%= form.text_field :desc, class: "description" %>
 	  <% if Item.visibleToUser(user, nil).count > 0 %>
-		<label for="node2_id">Choose Second Item</label>
+		<label for="node2_id">Choose Second Topic</label>
 		<%= select_tag :node2_id, options_from_collection_for_select(Item.order("name ASC").visibleToUser(user, nil), "id", "name") %>
 	  <% end %>
 	  <label for="synapse_permission">Permission</label>

app/views/synapses/_new.html.erb

@@ -2,15 +2,16 @@
 	<%= form_for Synapse.new, url: user_synapses_url(user), remote: true do |form| %>
 	  <button id="closenewsynapse" onclick="$('#new_synapse').fadeOut('fast'); $('#new_synapse')[0].reset(); return false;">close</button>
 	  <h3>Add Synapse Between Topics</h3> 
-	  <%= hidden_field_tag(:category, "Item") %>  
 	  <% if Item.visibleToUser(user, nil).count > 0 %>
-		<label for="node1_id">Choose First Item</label>
+		<label for="node1_id">Choose First Topic</label>
 		<%= select_tag :node1_id, options_from_collection_for_select(Item.order("name ASC").visibleToUser(user, nil), "id", "name") %>
 	  <% end %>
+	  <label for="item_category">Directionality of the Connection</label>
+	  <%= form.select :category, options_for_select(['none', 'both', 'from-to', 'to-from']) %>
 	  <label for="item_desc">Describe The Connection</label>
 	  <%= form.text_field :desc, class: "description" %>
 	  <% if Item.visibleToUser(user, nil).count > 0 %>
-		<label for="node2_id">Choose Second Item</label>
+		<label for="node2_id">Choose Second Topic</label>
 		<%= select_tag :node2_id, options_from_collection_for_select(Item.order("name ASC").visibleToUser(user, nil), "id", "name") %>
 	  <% end %>
 	  <label for="synapse_permission">Permission</label>

app/views/synapses/edit.html.erb

@@ -1,14 +1,16 @@
 <%= form_for @synapse, url: user_synapse_url do |form| %>
   <h3>Edit Synapse</h3>
-  <% if @collection.count > 0 %>
+  <% if Item.visibleToUser(user, nil).count > 0 %>
 	<label for="node1_id">Choose First <%= @synapse.category %></label>
-	<%= select "node1_id", "node1", @collection.order("name ASC").map {|p| [ p.name, p.id ] }, { :selected => @synapse.node1_id } %>
+	<%= select "node1_id", "node1", Item.order("name ASC").visibleToUser(user, nil).map {|p| [ p.name, p.id ] }, { :selected => @synapse.node1_id } %>
   <% end %>
+  <label for="item_category">Directionality of the Connection</label>
+  <%= form.select :category, options_for_select(['none', 'both', 'from-to', 'to-from'], @synapse.category) %>
   <label for="item_desc">Describe The Connection</label>
   <%= form.text_field :desc, class: "description" %>
-  <% if @collection.count > 0 %>
+  <% if Item.visibleToUser(user, nil).count > 0 %>
 	<label for="node2_id">Choose Second <%= @synapse.category %></label>
-	<%= select "node2_id", "node2", @collection.order("name ASC").map {|p| [ p.name, p.id ] }, { :selected => @synapse.node2_id } %>
+	<%= select "node2_id", "node2", Item.order("name ASC").visibleToUser(user, nil).map {|p| [ p.name, p.id ] }, { :selected => @synapse.node2_id } %>
   <% end %>
   <label for="synapse_permission">Permission</label>
   <%= form.select :permission, options_for_select(['commons', 'public', 'private'], @synapse.permission) %>

app/views/synapses/new.html.erb

@@ -1,15 +1,16 @@
 <div class="newsynapses">
 	<%= form_for @synapse, url: user_synapses_url do |form| %>
 	  <h3>Add Synapse Between Topics</h3> 
-	  <%= hidden_field_tag(:category, "Item") %>  
 	  <% if Item.visibleToUser(user, nil).count > 0 %>
-		<label for="node1_id">Choose First Item</label>
+		<label for="node1_id">Choose First Topic</label>
 		<%= select_tag :node1_id, options_from_collection_for_select(Item.order("name ASC").visibleToUser(user, nil), "id", "name") %>
 	  <% end %>
+	  <label for="item_category">Directionality of the Connection</label>
+	  <%= form.select :category, options_for_select(['none', 'both', 'from-to', 'to-from']) %>
 	  <label for="item_desc">Describe The Connection</label>
 	  <%= form.text_field :desc, class: "description" %>
 	  <% if Item.visibleToUser(user, nil).count > 0 %>
-		<label for="node2_id">Choose Second Item</label>
+		<label for="node2_id">Choose Second Topic</label>
 		<%= select_tag :node2_id, options_from_collection_for_select(Item.order("name ASC").visibleToUser(user, nil), "id", "name") %>
 	  <% end %>
 	  <label for="synapse_permission">Permission</label>

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20121029164735) do
+ActiveRecord::Schema.define(:version => 20121026000731) do
 
   create_table "item_categories", :force => true do |t|
     t.text     "name"
@@ -24,11 +24,11 @@ ActiveRecord::Schema.define(:version => 20121029164735) do
     t.text     "name"
     t.text     "desc"
     t.text     "link"
+    t.text     "permission"
     t.integer  "user_id"
     t.integer  "item_category_id"
     t.datetime "created_at",       :null => false
     t.datetime "updated_at",       :null => false
-    t.text     "permission"
   end
 
   create_table "mappings", :force => true do |t|
@@ -44,37 +44,37 @@ ActiveRecord::Schema.define(:version => 20121029164735) do
   end
 
   create_table "maps", :force => true do |t|
-    t.datetime "created_at", :null => false
-    t.datetime "updated_at", :null => false
     t.text     "name"
     t.text     "desc"
     t.text     "permission"
     t.integer  "user_id"
+    t.datetime "created_at", :null => false
+    t.datetime "updated_at", :null => false
   end
 
   create_table "synapses", :force => true do |t|
     t.text     "desc"
     t.text     "category"
+    t.text     "weight"
+    t.text     "permission"
     t.integer  "node1_id"
     t.integer  "node2_id"
     t.integer  "user_id"
     t.datetime "created_at", :null => false
     t.datetime "updated_at", :null => false
-    t.text     "permission"
-    t.text     "weight"
   end
 
   create_table "users", :force => true do |t|
     t.string   "name"
     t.string   "email"
+    t.string   "code",              :limit => 8
+    t.string   "joinedwithcode",    :limit => 8
     t.string   "crypted_password"
     t.string   "password_salt"
     t.string   "persistence_token"
     t.string   "perishable_token"
     t.datetime "created_at",                     :null => false
     t.datetime "updated_at",                     :null => false
-    t.string   "code",              :limit => 8
-    t.string   "joinedwithcode",    :limit => 8
   end
 
 end