From 72dccaa51ca36f29940322f332e84940d171a7e0 Mon Sep 17 00:00:00 2001
From: Nils Schneider <nils@nilsschneider.net>
Date: Sun, 19 Apr 2015 16:29:22 +0200
Subject: [PATCH] forcegraph: restore last panzoom on resetview

---
 lib/forcegraph.js | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/lib/forcegraph.js b/lib/forcegraph.js
index 10fd665..4a7132c 100644
--- a/lib/forcegraph.js
+++ b/lib/forcegraph.js
@@ -18,6 +18,7 @@ define(["d3"], function (d3) {
     var highlightedLinks = []
     var nodes = []
     var unknownNodes = []
+    var savedPanZoom
 
     var draggedNode
 
@@ -118,6 +119,12 @@ define(["d3"], function (d3) {
 
     var translateP, scaleP
 
+    function onPanZoom() {
+      savedPanZoom = {translate: zoomBehavior.translate(),
+                      scale: zoomBehavior.scale()}
+      panzoom()
+    }
+
     function panzoom() {
       var translate = zoomBehavior.translate()
       var scale = zoomBehavior.scale()
@@ -196,7 +203,10 @@ define(["d3"], function (d3) {
         }
 
       if (!nopanzoom)
-        panzoomTo([0, 0], force.size())
+        if (!savedPanZoom)
+          panzoomTo([0, 0], force.size())
+        else
+          animatePanzoom(savedPanZoom.translate, savedPanZoom.scale)
     }
 
     function drawLabel(d) {
@@ -465,7 +475,7 @@ define(["d3"], function (d3) {
 
     zoomBehavior = d3.behavior.zoom()
                      .scaleExtent([1 / 3, 3])
-                     .on("zoom", panzoom)
+                     .on("zoom", onPanZoom)
                      .translate([sidebar.getWidth(), 0])
 
     canvas = d3.select(el)