Ticket #4441: 4441_partial_patch.diff

Index: ui.selectable.js
===================================================================
--- ui.selectable.js	(revision 2593)
+++ ui.selectable.js	(working copy)
@@ -66,6 +66,11 @@
 	_mouseStart: function(event) {
 		var self = this;
 
+		if (this._trigger("start", event) === false) {
+                        this.opos = null;
+                        return;
+                }
+
 		this.opos = [event.pageX, event.pageY];
 
 		if (this.options.disabled)
@@ -75,8 +80,6 @@
 
 		this.selectees = $(options.filter, this.element[0]);
 
-		this._trigger("start", event);
-
 		$(options.appendTo).append(this.helper);
 		// position helper (lasso)
 		this.helper.css({
@@ -126,8 +129,10 @@
 
 	_mouseDrag: function(event) {
 		var self = this;
+                if (!this.opos) //if we never really started a selection
+                        return;
 		this.dragged = true;
-
+                
 		if (this.options.disabled)
 			return;