got editing of synapses working. Also tidied up selection code.

app/assets/javascripts/Jit/graphsettings.js

@@ -408,26 +408,78 @@ var nodeSettings = {
 	  }  
 	}
 
+function editEdge(edge, e) {
+  deselectEdge(edge); //so the label is missing while editing
+  if (!document.getElementById('edit_synapse')) {
+    var edit_div = document.createElement('div');
+    edit_div.setAttribute('id', 'edit_synapse');
+    edit_div.setAttribute('class', 'best_in_place best_in_place_desc');
+    edit_div.setAttribute('data-object', 'synapse');
+    edit_div.setAttribute('data-attribute', 'desc');
+    edit_div.setAttribute('data-type', 'input');
+    //TODO how to get blank data-nil
+    edit_div.setAttribute('data-nil', ' ');
+    $('.main .wrapper').append(edit_div);
+  }//if
+
+  $('#edit_synapse').attr('data-url', '/synapses/' + edge.getData("id"));
+  $('#edit_synapse').html(edge.getData("desc"));
+  $('#edit_synapse').css('position', 'absolute');
+  $('#edit_synapse').css('left', e.clientX);
+  $('#edit_synapse').css('top', e.clientY);
+
+  $('#edit_synapse').bind("ajax:success", function() {
+    var desc = $(this).html();
+    $('#edit_synapse').hide();
+    edge.setData("desc", desc);
+    selectEdge(edge);
+    Mconsole.plot();
+  });
+
+  $('#edit_synapse').focusout(function() {
+    $('#edit_synapse').hide();
+  });
+  
+  //css stuff above moves it, this activates it
+  $('#edit_synapse').click();
+  $('#edit_synapse input').focus();
+  $('#edit_synapse').show();
+}
+
 function selectEdgeOnClickHandler(adj, e) {
+  //editing overrides everything else
+  if (e.altKey) {
+    editEdge(adj, e);
+    return;
+  }
+
   var showDesc = adj.getData("showDesc");
-  if (showDesc) {
+  if (showDesc && e.shiftKey) {
+    //deselecting an edge with shift
     deselectEdge(adj);
-    Mconsole.plot();
+  } else if (!showDesc && e.shiftKey) {
-  } 
+    //selecting an edge with shift
-  if (!e.shiftKey) {
+    selectEdge(adj);
-	for (var i = 0; i < selectedEdges.length; i += 1) {
+  } else if (showDesc && !e.shiftKey) {
-      var edge = selectedEdges[i];
+    //deselecting an edge without shift - unselect all
-      deselectEdge(edge);
+    deselectAllEdges();
-    }  
+  } else if (!showDesc && !e.shiftKey) {
-  }
+    //selecting an edge without shift - unselect all but new one
-  if (!showDesc) {
+    deselectAllEdges();
     selectEdge(adj);
-    Mconsole.plot();
   }
+
+  Mconsole.plot();
 }//selectEdgeOnClickHandler
 
+function deselectAllEdges() {
+  for (var i = 0; i < selectedEdges.length; i += 1) {
+    var edge = selectedEdges[i];
+    deselectEdge(edge);
+  }  
+}
+
 function selectNodeOnClickHandler(node, e) {
-				
   //set final styles 
   if (!e.shiftKey) { 
 	  Mconsole.graph.eachNode(function (n) {

app/controllers/synapses_controller.rb

@@ -100,20 +100,27 @@ class SynapsesController < ApplicationController
   
   # PUT synapses/:id
   def update
-	  @current = current_user
+	@current = current_user
     @synapse = Synapse.find(params[:id]).authorize_to_edit(@current)
     
-	  if @synapse 
+	if @synapse
-		  @synapse.desc = params[:synapse][:desc]
+      if params[:synapse]
-		  @synapse.category = params[:synapse][:category]
+        @synapse.desc = params[:synapse][:desc] if params[:synapse][:desc]
-		  @synapse.topic1 = Topic.find(params[:node1_id][:node1])
+	    @synapse.category = params[:synapse][:category] if params[:synapse][:category]
-		  @synapse.topic2 = Topic.find(params[:node2_id][:node2])
+	    @synapse.permission = params[:synapse][:permission] if params[:synapse][:permission]
-	    @synapse.permission = params[:synapse][:permission]
+      end
-		  @synapse.save
+      if params[:node1_id] and params[:node1_id][:node1]
+	    @synapse.topic1 = Topic.find(params[:node1_id][:node1])
+      end
+      if params[:node1_id] and params[:node1_id][:node1]
+	    @synapse.topic2 = Topic.find(params[:node2_id][:node2])
+      end
+	  @synapse.save
     end
 	
-    respond_with(@user, location: synapse_url(@synapse)) do |format|
+    respond_with @synapse
-    end
+    #respond_with(@user, location: synapse_url(@synapse)) do |format|
+    #end
   end
 
   # POST mappings/:map_id/:synapse_id/removefrommap

app/views/synapses/create.js.erb

@@ -10,7 +10,6 @@ if ( Mconsole != null) {
     temp2 = Mconsole.graph.getNode(<%= @synapse.topic2.id %>);
     Mconsole.graph.addAdjacence(temp1, temp2, {});
     temp = Mconsole.graph.getAdjacence(temp1.id, temp2.id);
-    console.log(temp);
     temp.setDataset('start', {  
       lineWidth: 0.4  
       });
@@ -20,7 +19,7 @@ if ( Mconsole != null) {
     var d = new Array(<%= @synapse.node1_id.to_s() %>, <%= @synapse.node2_id.to_s() %>);
     temp.setDataset('current', {  
       desc: '<%= @synapse.desc %>',  
-      showDesc: true,
+      showDesc: false, //will be changed by selectEdge
       category: '<%= @synapse.category %>',
       id: '<%= @synapse.id %>',
       userid: '<%= @synapse.user.id %>',