From fc4e84fafa99a27372b55bbd5f28f8af8429f3d0 Mon Sep 17 00:00:00 2001
From: Robert Konigsberg <konigsberg@google.com>
Date: Fri, 13 May 2011 11:37:40 -0400
Subject: [PATCH] When pan is the default behavior, clearSelection can't be
 called on redraw.

---
 auto_tests/tests/interaction_model.js |  3 +--
 dygraph.js                            | 30 +++++++++++++++++++++---------
 2 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/auto_tests/tests/interaction_model.js b/auto_tests/tests/interaction_model.js
index 2698b5f..6249731 100644
--- a/auto_tests/tests/interaction_model.js
+++ b/auto_tests/tests/interaction_model.js
@@ -123,7 +123,6 @@ InteractionModelTestCase.prototype.testClickCallbackIsCalledOnCustomPan = functi
   DygraphOps.dispatchMouseMove_Point(g, 10, 10);
   DygraphOps.dispatchMouseUp_Point(g, 10, 10);
 
-  // THIS STILL FAILS. It's clicked, but x is undefined.
-  // assertEquals(20, clicked);
+  assertEquals(20, clicked);
 };
 
diff --git a/dygraph.js b/dygraph.js
index 61e8e49..c10ef05 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -1227,7 +1227,7 @@ Dygraph.Interaction.movePan = function(event, g, context) {
     }
   }
 
-  g.drawGraph_();
+  g.drawGraph_(false);
 };
 
 /**
@@ -2674,9 +2674,19 @@ Dygraph.prototype.predraw_ = function() {
  * Update the graph with new data. This method is called when the viewing area
  * has changed. If the underlying data or options have changed, predraw_ will
  * be called before drawGraph_ is called.
+ *
+ * clearSelection, when undefined or true, causes this.clearSelection to be
+ * called at the end of the draw operation. This should rarely be defined,
+ * and never true (that is it should be undefined most of the time, and
+ * rarely false.)
+ *
  * @private
  */
-Dygraph.prototype.drawGraph_ = function() {
+Dygraph.prototype.drawGraph_ = function(clearSelection) {
+  if (typeof clearSelection === 'undefined') {
+    clearSelection = true;
+  }
+
   var data = this.rawData_;
 
   // This is used to set the second parameter to drawCallback, below.
@@ -2819,13 +2829,15 @@ Dygraph.prototype.drawGraph_ = function() {
     // Generate a static legend before any particular point is selected.
     this.setLegendHTML_();
   } else {
-    if (typeof(this.selPoints_) !== 'undefined' && this.selPoints_.length) {
-      // We should select the point nearest the page x/y here, but it's easier
-      // to just clear the selection. This prevents erroneous hover dots from
-      // being displayed.
-      this.clearSelection();
-    } else {
-      this.clearSelection();
+    if (clearSelection) {
+      if (typeof(this.selPoints_) !== 'undefined' && this.selPoints_.length) {
+        // We should select the point nearest the page x/y here, but it's easier
+        // to just clear the selection. This prevents erroneous hover dots from
+        // being displayed.
+        this.clearSelection();
+      } else {
+        this.clearSelection();
+      }
     }
   }
 
-- 
2.7.4