From 324a69d64e71b6bef1db0131df70f48ca73df3bf Mon Sep 17 00:00:00 2001
From: Jeremy Goecks <jeremy.goecks@emory.edu>
Date: Tue, 11 Dec 2012 16:47:54 -0500
Subject: [PATCH] Trackster: when creating a visualization, default the view to
 the first chromosome.

---
 static/scripts/viz/trackster/tracks.js | 2 +-
 static/scripts/viz/trackster_ui.js     | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/static/scripts/viz/trackster/tracks.js b/static/scripts/viz/trackster/tracks.js
index 5f767dbb6e2..3f1c174633a 100644
--- a/static/scripts/viz/trackster/tracks.js
+++ b/static/scripts/viz/trackster/tracks.js
@@ -1190,7 +1190,7 @@ extend( TracksterView.prototype, DrawableCollection.prototype, {
                 view.chrom_select.html(chrom_options);
                 view.chrom_start_index = result.start_index;
                 
-                chrom_data.resolve(result);
+                chrom_data.resolve(result.chrom_info);
             },
             error: function() {
                 alert("Could not load chroms for this dbkey:", view.dbkey);
diff --git a/static/scripts/viz/trackster_ui.js b/static/scripts/viz/trackster_ui.js
index 332036b9dbd..83d565652c7 100644
--- a/static/scripts/viz/trackster_ui.js
+++ b/static/scripts/viz/trackster_ui.js
@@ -188,7 +188,7 @@ var TracksterUI = base.Base.extend({
         var self = this,
             view = new tracks.TracksterView(view_config);
         view.editor = true;
-        $.when( view.load_chroms_deferred ).then(function() {
+        $.when( view.load_chroms_deferred ).then(function(chrom_info) {
             // Viewport config.
             if (viewport_config) {
                 var 
@@ -201,6 +201,10 @@ var TracksterUI = base.Base.extend({
                     view.change_chrom(chrom, start, end);
                 }
             }
+            else {
+                // No viewport, so use first chromosome.
+                view.change_chrom(chrom_info[0].chrom);
+            }
             
             // Add drawables to view.
             if (drawables_config) {