From 56d2d3cd4a556fd88fd3018716a7b3f974a4e305 Mon Sep 17 00:00:00 2001
From: Alon Levy <alon@pobox.com>
Date: Sun, 15 Feb 2015 12:19:55 +0200
Subject: add underscore, implement ctrl-click to append to selection

---
 src/client/view/selection.js | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

(limited to 'src/client/view/selection.js')

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);
     }
 }
 
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