add underscore, implement ctrl-click to append to selection

2 files changed, 10 insertions, 9 deletions

diff --git a/src/client/view/graph_view.js b/src/client/view/graph_view.js
index 205ba0fe..abe95d7b 100644
--- a/src/client/view/graph_view.js
+++ b/src/client/view/graph_view.js
@@ -320,7 +320,7 @@ function GraphView(spec) {
                     graph.links_rm([that.link]);
                 });
                 view.edge_info.show(d);
-                selection.update([src, dst]);
+                selection.update([src, dst], d3.event.ctrlKey);
             });
 
         link.attr("class", function(d, i){
@@ -453,7 +453,7 @@ function GraphView(spec) {
                 }
                 if (!temporary) {
                     svgInput.enable(this, d, nodeTextX(d));
-                    selection.update([d]);
+                    selection.update([d], d3.event.ctrlKey);
                     showNodeInfo(graph.find_node__by_id(this.parentNode.id));
                 }
                 d3.event.stopPropagation();
@@ -516,7 +516,7 @@ function GraphView(spec) {
                     return;
                 }
                 d3.event.stopPropagation();
-                selection.update([d]);
+                selection.update([d], d3.event.ctrlKey);
                 if(!temporary) {
                     showNodeInfo(d);
                 }
diff --git a/src/client/view/selection.js b/src/client/view/selection.js
index 7cade769..f5d4c895 100644
--- a/src/client/view/selection.js
+++ b/src/client/view/selection.js
@@ -1,5 +1,5 @@
-define(['rz_core', 'Bacon'],
-function(rz_core,   Bacon) {
+define(['rz_core', 'Bacon', 'underscore'],
+function(rz_core,   Bacon, _) {
 
 function get_main_graph()
 {
@@ -149,11 +149,12 @@ var inner_update = function(nodes)
     connectedComponent(nodes);
 }
 
-var update = function(nodes) {
-    var set = !arr_compare(nodes, root_nodes);
+var update = function(nodes, append) {
+    var new_nodes = append ? _.union(root_nodes, nodes) : nodes;
+    var not_same = !arr_compare(new_nodes, root_nodes);
 
-    if (set) {
-        inner_update(nodes);
+    if (not_same) {
+        inner_update(new_nodes);
     }
 }