Browser sniffing and pointer events fixes and enhancements

Gruntfile.js

@@ -202,7 +202,7 @@ module.exports = function(grunt) {
             target: sources
         },
         "git-describe": {
-            "options": {
+            options: {
                 failOnError: false
             },
             build: {}

changelog.txt

@@ -7,6 +7,16 @@ OPENSEADRAGON CHANGELOG
 * Documentation fix (#1814 @kenanchristian)
 * Better cleanup on destruction, to avoid memory leaks (#1832 @JoFrMueller)
 * Miscellaneous code cleanup (#1840 @msalsbery)
+* Improved browser sniffing - detect EDGE and CHROMEEDGE browsers
+* Improved DOM event model feature detection
+* Added support for options parameter on addEvent()/removeEvent (to support passive option)
+* Added OpenSeadragon.eventIsCanceled() function for defaultPrevented detection on DOM events
+* MouseTracker: better PointerEvent model detection - removed use of deprecated window.navigator.pointerEnabled
+* MouseTracker: added overHandler/outHandler options for handling corresponding pointerover/pointerout events
+* MouseTracker: changed enterHandler/leaveHandler to use DOM pointerenter/pointerleave events instead of simulating using pointerover/pointerout
+* DEPRECATION: MouseTracker exitHandler deprecated for name change to leaveHandler for consistency with DOM event names
+* Added missing Button event object properties (were listed in documentation but not implemented)
+* Fixed bug in Button class where two MouseTracker event handlers used an invalid "this" causing issues in some browsers
 
 2.4.2:
 

src/button.js

@@ -77,6 +77,7 @@ $.ButtonState = {
  * @param {OpenSeadragon.EventHandler} [options.onExit=null] Event handler callback for {@link OpenSeadragon.Button.event:exit}.
  * @param {OpenSeadragon.EventHandler} [options.onFocus=null] Event handler callback for {@link OpenSeadragon.Button.event:focus}.
  * @param {OpenSeadragon.EventHandler} [options.onBlur=null] Event handler callback for {@link OpenSeadragon.Button.event:blur}.
+ * @param {Object} [options.userData=null] Arbitrary object to be passed unchanged to any attached handler methods.
  */
 $.Button = function( options ) {
 
@@ -111,7 +112,8 @@ $.Button = function( options ) {
         onEnter:            null,
         onExit:             null,
         onFocus:            null,
-        onBlur:             null
+        onBlur:             null,
+        userData:           null
 
     }, options );
 
@@ -203,6 +205,7 @@ $.Button = function( options ) {
      */
     this.tracker = new $.MouseTracker({
 
+        userData:           'Button.tracker',
         element:            this.element,
         clickTimeThreshold: this.clickTimeThreshold,
         clickDistThreshold: this.clickDistThreshold,
@@ -220,14 +223,18 @@ $.Button = function( options ) {
                  * @property {Object} originalEvent - The original DOM event.
                  * @property {?Object} userData - Arbitrary subscriber-defined object.
                  */
-                _this.raiseEvent( "enter", { originalEvent: event.originalEvent } );
+                _this.raiseEvent( "enter", {
+                    eventSource: _this,
+                    originalEvent: event.originalEvent,
+                    userData: _this.userData
+                } );
             } else if ( !event.buttonDownAny ) {
                 inTo( _this, $.ButtonState.HOVER );
             }
         },
 
         focusHandler: function ( event ) {
-            this.enterHandler( event );
+            _this.tracker.enterHandler( event );
             /**
              * Raised when the Button element receives focus.
              *
@@ -238,10 +245,14 @@ $.Button = function( options ) {
              * @property {Object} originalEvent - The original DOM event.
              * @property {?Object} userData - Arbitrary subscriber-defined object.
              */
-            _this.raiseEvent( "focus", { originalEvent: event.originalEvent } );
+            _this.raiseEvent( "focus", {
+                eventSource: _this,
+                originalEvent: event.originalEvent,
+                userData: _this.userData
+            } );
         },
 
-        exitHandler: function( event ) {
+        leaveHandler: function( event ) {
             outTo( _this, $.ButtonState.GROUP );
             if ( event.insideElementPressed ) {
                 /**
@@ -254,12 +265,16 @@ $.Button = function( options ) {
                  * @property {Object} originalEvent - The original DOM event.
                  * @property {?Object} userData - Arbitrary subscriber-defined object.
                  */
-                _this.raiseEvent( "exit", { originalEvent: event.originalEvent } );
+                _this.raiseEvent( "exit", {
+                    eventSource: _this,
+                    originalEvent: event.originalEvent,
+                    userData: _this.userData
+                } );
             }
         },
 
         blurHandler: function ( event ) {
-            this.exitHandler( event );
+            _this.tracker.leaveHandler( event );
             /**
              * Raised when the Button element loses focus.
              *
@@ -270,7 +285,11 @@ $.Button = function( options ) {
              * @property {Object} originalEvent - The original DOM event.
              * @property {?Object} userData - Arbitrary subscriber-defined object.
              */
-            _this.raiseEvent( "blur", { originalEvent: event.originalEvent } );
+            _this.raiseEvent( "blur", {
+                eventSource: _this,
+                originalEvent: event.originalEvent,
+                userData: _this.userData
+            } );
         },
 
         pressHandler: function ( event ) {
@@ -285,7 +304,11 @@ $.Button = function( options ) {
              * @property {Object} originalEvent - The original DOM event.
              * @property {?Object} userData - Arbitrary subscriber-defined object.
              */
-            _this.raiseEvent( "press", { originalEvent: event.originalEvent } );
+            _this.raiseEvent( "press", {
+                eventSource: _this,
+                originalEvent: event.originalEvent,
+                userData: _this.userData
+            } );
         },
 
         releaseHandler: function( event ) {
@@ -301,7 +324,11 @@ $.Button = function( options ) {
                  * @property {Object} originalEvent - The original DOM event.
                  * @property {?Object} userData - Arbitrary subscriber-defined object.
                  */
-                _this.raiseEvent( "release", { originalEvent: event.originalEvent } );
+                _this.raiseEvent( "release", {
+                    eventSource: _this,
+                    originalEvent: event.originalEvent,
+                    userData: _this.userData
+                } );
             } else if ( event.insideElementPressed ) {
                 outTo( _this, $.ButtonState.GROUP );
             } else {
@@ -321,7 +348,11 @@ $.Button = function( options ) {
                  * @property {Object} originalEvent - The original DOM event.
                  * @property {?Object} userData - Arbitrary subscriber-defined object.
                  */
-                _this.raiseEvent("click", { originalEvent: event.originalEvent });
+                _this.raiseEvent("click", {
+                    eventSource: _this,
+                    originalEvent: event.originalEvent,
+                    userData: _this.userData
+                });
             }
         },
 
@@ -338,7 +369,11 @@ $.Button = function( options ) {
                  * @property {Object} originalEvent - The original DOM event.
                  * @property {?Object} userData - Arbitrary subscriber-defined object.
                  */
-                _this.raiseEvent( "click", { originalEvent: event.originalEvent } );
+                _this.raiseEvent( "click", {
+                    eventSource: _this,
+                    originalEvent: event.originalEvent,
+                    userData: _this.userData
+                } );
                 /***
                  * Raised when the mouse button is released or touch ends in the Button element.
                  *
@@ -349,7 +384,11 @@ $.Button = function( options ) {
                  * @property {Object} originalEvent - The original DOM event.
                  * @property {?Object} userData - Arbitrary subscriber-defined object.
                  */
-                _this.raiseEvent( "release", { originalEvent: event.originalEvent } );
+                _this.raiseEvent( "release", {
+                    eventSource: _this,
+                    originalEvent: event.originalEvent,
+                    userData: _this.userData
+                } );
                 return false;
             }
             return true;
@@ -363,8 +402,8 @@ $.Button = function( options ) {
 $.extend( $.Button.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.Button.prototype */{
 
     /**
-     * TODO: Determine what this function is intended to do and if it's actually
+     * Used by a button container element (e.g. a ButtonGroup) to transition the button state
-     * useful as an API point.
+     * to ButtonState.GROUP.
      * @function
      */
     notifyGroupEnter: function() {
@@ -372,8 +411,8 @@ $.extend( $.Button.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.
     },
 
     /**
-     * TODO: Determine what this function is intended to do and if it's actually
+     * Used by a button container element (e.g. a ButtonGroup) to transition the button state
-     * useful as an API point.
+     * to ButtonState.REST.
      * @function
      */
     notifyGroupExit: function() {

src/buttongroup.js

@@ -88,6 +88,7 @@ $.ButtonGroup = function( options ) {
      * @memberof OpenSeadragon.ButtonGroup#
      */
     this.tracker = new $.MouseTracker({
+        userData:           'ButtonGroup.tracker',
         element:            this.element,
         clickTimeThreshold: this.clickTimeThreshold,
         clickDistThreshold: this.clickDistThreshold,
@@ -97,7 +98,7 @@ $.ButtonGroup = function( options ) {
                 _this.buttons[ i ].notifyGroupEnter();
             }
         },
-        exitHandler: function ( event ) {
+        leaveHandler: function ( event ) {
             var i;
             if ( !event.insideElementPressed ) {
                 for ( i = 0; i < _this.buttons.length; i++ ) {
@@ -127,8 +128,8 @@ $.ButtonGroup.prototype = {
      * @function
      * @private
      */
-    emulateExit: function() {
+    emulateLeave: function() {
-        this.tracker.exitHandler( { eventSource: this.tracker } );
+        this.tracker.leaveHandler( { eventSource: this.tracker } );
     },
 
     destroy: function() {

src/mousetracker.js

@@ -74,8 +74,14 @@
      *      event is fired.
      * @param {OpenSeadragon.EventHandler} [options.enterHandler=null]
      *      An optional handler for pointer enter.
+     * @param {OpenSeadragon.EventHandler} [options.leaveHandler=null]
+     *      An optional handler for pointer leave.
      * @param {OpenSeadragon.EventHandler} [options.exitHandler=null]
-     *      An optional handler for pointer exit.
+     *      An optional handler for pointer leave. <span style="color:red;">Deprecated. Use leaveHandler instead.</span>
+     * @param {OpenSeadragon.EventHandler} [options.overHandler=null]
+     *      An optional handler for pointer over.
+     * @param {OpenSeadragon.EventHandler} [options.outHandler=null]
+     *      An optional handler for pointer out.
      * @param {OpenSeadragon.EventHandler} [options.pressHandler=null]
      *      An optional handler for pointer press.
      * @param {OpenSeadragon.EventHandler} [options.nonPrimaryPressHandler=null]
@@ -165,7 +171,10 @@
         this.stopDelay             = options.stopDelay         || 50;
 
         this.enterHandler             = options.enterHandler             || null;
+        this.leaveHandler             = options.leaveHandler             || null;
         this.exitHandler              = options.exitHandler              || null;
+        this.overHandler              = options.overHandler              || null;
+        this.outHandler               = options.outHandler               || null;
         this.pressHandler             = options.pressHandler             || null;
         this.nonPrimaryPressHandler   = options.nonPrimaryPressHandler   || null;
         this.releaseHandler           = options.releaseHandler           || null;
@@ -207,10 +216,10 @@
             DOMMouseScroll:        function ( event ) { onMouseWheel( _this, event ); },
             MozMousePixelScroll:   function ( event ) { onMouseWheel( _this, event ); },
 
-            mouseenter:            function ( event ) { onMouseEnter( _this, event ); }, // Used on IE8 only
+            mouseover:             function ( event ) { onMouseOver( _this, event ); }, // IE9+ only
-            mouseleave:            function ( event ) { onMouseLeave( _this, event ); }, // Used on IE8 only
+            mouseout:              function ( event ) { onMouseOut( _this, event ); },  // IE9+ only
-            mouseover:             function ( event ) { onMouseOver( _this, event ); },
+            mouseenter:            function ( event ) { onMouseEnter( _this, event ); },
-            mouseout:              function ( event ) { onMouseOut( _this, event ); },
+            mouseleave:            function ( event ) { onMouseLeave( _this, event ); },
             mousedown:             function ( event ) { onMouseDown( _this, event ); },
             mouseup:               function ( event ) { onMouseUp( _this, event ); },
             mouseupcaptured:       function ( event ) { onMouseUpCaptured( _this, event ); },
@@ -231,6 +240,10 @@
             MSPointerOver:         function ( event ) { onPointerOver( _this, event ); },
             pointerout:            function ( event ) { onPointerOut( _this, event ); },
             MSPointerOut:          function ( event ) { onPointerOut( _this, event ); },
+            pointerenter:          function ( event ) { onPointerEnter( _this, event ); },
+            MSPointerEnter:        function ( event ) { onPointerEnter( _this, event ); },
+            pointerleave:          function ( event ) { onPointerLeave( _this, event ); },
+            MSPointerLeave:        function ( event ) { onPointerLeave( _this, event ); },
             pointerdown:           function ( event ) { onPointerDown( _this, event ); },
             MSPointerDown:         function ( event ) { onPointerDown( _this, event ); },
             pointerup:             function ( event ) { onPointerUp( _this, event ); },
@@ -403,12 +416,74 @@
          *      True if the original event is a touch event, otherwise false. <span style="color:red;">Deprecated. Use pointerType and/or originalEvent instead.</span>
          * @param {Object} event.originalEvent
          *      The original event object.
+         * @param {Object} event.userData
+         *      Arbitrary user-defined object.
+         */
+        enterHandler: function () { },
+
+        /**
+         * Implement or assign implementation to these handlers during or after
+         * calling the constructor.
+         * @function
+         * @deprecated Use leaveHandler instead
+         * @param {Object} event
+         * @param {OpenSeadragon.MouseTracker} event.eventSource
+         *      A reference to the tracker instance.
+         * @param {String} event.pointerType
+         *     "mouse", "touch", "pen", etc.
+         * @param {OpenSeadragon.Point} event.position
+         *      The position of the event relative to the tracked element.
+         * @param {Number} event.buttons
+         *      Current buttons pressed.
+         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.
+         * @param {Number} event.pointers
+         *      Number of pointers (all types) active in the tracked element.
+         * @param {Boolean} event.insideElementPressed
+         *      True if the left mouse button is currently being pressed and was
+         *      initiated inside the tracked element, otherwise false.
+         * @param {Boolean} event.buttonDownAny
+         *      Was the button down anywhere in the screen during the event. <span style="color:red;">Deprecated. Use buttons instead.</span>
+         * @param {Boolean} event.isTouchEvent
+         *      True if the original event is a touch event, otherwise false. <span style="color:red;">Deprecated. Use pointerType and/or originalEvent instead.</span>
+         * @param {Object} event.originalEvent
+         *      The original event object.
+         * @param {Object} event.userData
+         *      Arbitrary user-defined object.
+         */
+        leaveHandler: function () { },
+
+        /**
+         * Implement or assign implementation to these handlers during or after
+         * calling the constructor.
+         * @function
+         * @deprecated Use leaveHandler instead
+         * @param {Object} event
+         * @param {OpenSeadragon.MouseTracker} event.eventSource
+         *      A reference to the tracker instance.
+         * @param {String} event.pointerType
+         *     "mouse", "touch", "pen", etc.
+         * @param {OpenSeadragon.Point} event.position
+         *      The position of the event relative to the tracked element.
+         * @param {Number} event.buttons
+         *      Current buttons pressed.
+         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.
+         * @param {Number} event.pointers
+         *      Number of pointers (all types) active in the tracked element.
+         * @param {Boolean} event.insideElementPressed
+         *      True if the left mouse button is currently being pressed and was
+         *      initiated inside the tracked element, otherwise false.
+         * @param {Boolean} event.buttonDownAny
+         *      Was the button down anywhere in the screen during the event. <span style="color:red;">Deprecated. Use buttons instead.</span>
+         * @param {Boolean} event.isTouchEvent
+         *      True if the original event is a touch event, otherwise false. <span style="color:red;">Deprecated. Use pointerType and/or originalEvent instead.</span>
+         * @param {Object} event.originalEvent
+         *      The original event object.
          * @param {Boolean} event.preventDefaultAction
          *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
          * @param {Object} event.userData
          *      Arbitrary user-defined object.
          */
-        enterHandler: function () { },
+        exitHandler: function () { },
 
         /**
          * Implement or assign implementation to these handlers during or after
@@ -440,7 +515,39 @@
          * @param {Object} event.userData
          *      Arbitrary user-defined object.
          */
-        exitHandler: function () { },
+        overHandler: function () { },
+
+        /**
+         * Implement or assign implementation to these handlers during or after
+         * calling the constructor.
+         * @function
+         * @param {Object} event
+         * @param {OpenSeadragon.MouseTracker} event.eventSource
+         *      A reference to the tracker instance.
+         * @param {String} event.pointerType
+         *     "mouse", "touch", "pen", etc.
+         * @param {OpenSeadragon.Point} event.position
+         *      The position of the event relative to the tracked element.
+         * @param {Number} event.buttons
+         *      Current buttons pressed.
+         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.
+         * @param {Number} event.pointers
+         *      Number of pointers (all types) active in the tracked element.
+         * @param {Boolean} event.insideElementPressed
+         *      True if the left mouse button is currently being pressed and was
+         *      initiated inside the tracked element, otherwise false.
+         * @param {Boolean} event.buttonDownAny
+         *      Was the button down anywhere in the screen during the event. <span style="color:red;">Deprecated. Use buttons instead.</span>
+         * @param {Boolean} event.isTouchEvent
+         *      True if the original event is a touch event, otherwise false. <span style="color:red;">Deprecated. Use pointerType and/or originalEvent instead.</span>
+         * @param {Object} event.originalEvent
+         *      The original event object.
+         * @param {Boolean} event.preventDefaultAction
+         *      Set to true to prevent the tracker subscriber from performing its default action (subscriber implementation dependent). Default: false.
+         * @param {Object} event.userData
+         *      Arbitrary user-defined object.
+         */
+        outHandler: function () { },
 
         /**
          * Implement or assign implementation to these handlers during or after
@@ -1020,38 +1127,37 @@
         $.MouseTracker.subscribeEvents.push( "MozMousePixelScroll" );
     }
 
-    // Note: window.navigator.pointerEnable is deprecated on IE 11 and not part of W3C spec.
+    if ( window.PointerEvent ) {
-    if ( window.PointerEvent && ( window.navigator.pointerEnabled || $.Browser.vendor !== $.BROWSERS.IE ) ) {
         // IE11 and other W3C Pointer Event implementations (see http://www.w3.org/TR/pointerevents)
         $.MouseTracker.havePointerEvents = true;
-        $.MouseTracker.subscribeEvents.push( "pointerover", "pointerout", "pointerdown", "pointerup", "pointermove", "pointercancel" );
+        $.MouseTracker.subscribeEvents.push( "pointerenter", "pointerleave", "pointerover", "pointerout", "pointerdown", "pointerup", "pointermove", "pointercancel" );
         $.MouseTracker.unprefixedPointerEvents = true;
         if( navigator.maxTouchPoints ) {
             $.MouseTracker.maxTouchPoints = navigator.maxTouchPoints;
         } else {
             $.MouseTracker.maxTouchPoints = 0;
         }
-        $.MouseTracker.haveMouseEnter = false;
+        $.MouseTracker.haveMouseOver = true;
     } else if ( window.MSPointerEvent && window.navigator.msPointerEnabled ) {
         // IE10
         $.MouseTracker.havePointerEvents = true;
-        $.MouseTracker.subscribeEvents.push( "MSPointerOver", "MSPointerOut", "MSPointerDown", "MSPointerUp", "MSPointerMove", "MSPointerCancel" );
+        $.MouseTracker.subscribeEvents.push( "MSPointerEnter", "MSPointerLeave", "MSPointerOver", "MSPointerOut", "MSPointerDown", "MSPointerUp", "MSPointerMove", "MSPointerCancel" );
         $.MouseTracker.unprefixedPointerEvents = false;
         if( navigator.msMaxTouchPoints ) {
             $.MouseTracker.maxTouchPoints = navigator.msMaxTouchPoints;
         } else {
             $.MouseTracker.maxTouchPoints = 0;
         }
-        $.MouseTracker.haveMouseEnter = false;
+        $.MouseTracker.haveMouseOver = true;
     } else {
         // Legacy W3C mouse events
         $.MouseTracker.havePointerEvents = false;
-        if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
         $.MouseTracker.subscribeEvents.push( "mouseenter", "mouseleave" );
-            $.MouseTracker.haveMouseEnter = true;
+        if ( $.Browser.vendor !== $.BROWSERS.IE || $.Browser.version > 8 ) {
-        } else {
             $.MouseTracker.subscribeEvents.push( "mouseover", "mouseout" );
-            $.MouseTracker.haveMouseEnter = false;
+            $.MouseTracker.haveMouseOver = true;
+        } else {
+            $.MouseTracker.haveMouseOver = false;
         }
         $.MouseTracker.subscribeEvents.push( "mousedown", "mouseup", "mousemove" );
         if ( 'ontouchstart' in window ) {
@@ -1832,38 +1938,12 @@
 
 
     /**
-     * Only used on IE 8
-     *
      * @private
      * @inner
      */
     function onMouseEnter( tracker, event ) {
         event = $.getEvent( event );
 
-        handleMouseEnter( tracker, event );
-    }
-
-
-    /**
-     * @private
-     * @inner
-     */
-    function onMouseOver( tracker, event ) {
-        event = $.getEvent( event );
-
-        if ( event.currentTarget === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
-            return;
-        }
-
-        handleMouseEnter( tracker, event );
-    }
-
-
-    /**
-     * @private
-     * @inner
-     */
-    function handleMouseEnter( tracker, event ) {
         var gPoint = {
             id: $.MouseTracker.mousePointerId,
             type: 'mouse',
@@ -1873,42 +1953,21 @@
         };
 
         updatePointersEnter( tracker, event, [ gPoint ] );
+
+        //TODO simulate mouseover on IE < 9?
+        // if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
+        //     handleMouseOver( tracker, event );
+        // }
     }
 
 
     /**
-     * Only used on IE 8
-     *
      * @private
      * @inner
      */
     function onMouseLeave( tracker, event ) {
         event = $.getEvent( event );
 
-        handleMouseExit( tracker, event );
-    }
-
-
-    /**
-     * @private
-     * @inner
-     */
-    function onMouseOut( tracker, event ) {
-        event = $.getEvent( event );
-
-        if ( event.currentTarget === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
-            return;
-        }
-
-        handleMouseExit( tracker, event );
-    }
-
-
-    /**
-     * @private
-     * @inner
-     */
-    function handleMouseExit( tracker, event ) {
         var gPoint = {
             id: $.MouseTracker.mousePointerId,
             type: 'mouse',
@@ -1917,7 +1976,76 @@
             currentTime: $.now()
         };
 
-        updatePointersExit( tracker, event, [ gPoint ] );
+        updatePointersLeave( tracker, event, [ gPoint ] );
+
+        //TODO simulate mouseoout on IE < 9?
+        // if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
+        //     handleMouseOut( tracker, event );
+        // }
+    }
+
+
+    /**
+     * IE9+ only
+     *
+     * @private
+     * @inner
+     */
+    function onMouseOver( tracker, event ) {
+        // if ( event.currentTarget === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
+        //     return;
+        // }
+
+        handleMouseOver( tracker, event );
+    }
+
+
+    /**
+     * @private
+     * @inner
+     */
+    function handleMouseOver( tracker, event ) {
+        var gPoint = {
+            id: $.MouseTracker.mousePointerId,
+            type: 'mouse',
+            isPrimary: true,
+            currentPos: getMouseAbsolute( event ),
+            currentTime: $.now()
+        };
+
+        updatePointersOver( tracker, event, [ gPoint ] );
+    }
+
+
+    /**
+     * IE9+ only
+     *
+     * @private
+     * @inner
+     */
+    function onMouseOut( tracker, event ) {
+        // if ( event.currentTarget === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
+        //     return;
+        // }
+
+        handleMouseOut( tracker, event );
+    }
+
+
+    /**
+     * @private
+     * @inner
+     */
+    function handleMouseOut( tracker, event ) {
+        var gPoint = {
+            id: $.MouseTracker.mousePointerId,
+            type: 'mouse',
+            isPrimary: true,
+            currentPos: getMouseAbsolute( event ),
+            currentTime: $.now()
+        };
+
+        updatePointersOut( tracker, event, [ gPoint ] );
     }
 
 
@@ -2083,7 +2211,7 @@
                 pointsList.captureCount = 1;
                 releasePointer( tracker, pointsList.type );
                 // simulate touchleave/mouseout
-                updatePointersExit( tracker, event, abortGPoints );
+                updatePointersLeave( tracker, event, abortGPoints );
             }
         }
     }
@@ -2199,7 +2327,7 @@
         }
 
         // simulate touchleave on our tracked element
-        updatePointersExit( tracker, event, gPoints );
+        updatePointersLeave( tracker, event, gPoints );
 
         // simulate touchleave on our tracked element's tracked ancestor elements
         for ( i = 0; i < MOUSETRACKERS.length; i++ ) {
@@ -2214,7 +2342,7 @@
                         currentTime: time
                     } );
                 }
-                updatePointersExit( MOUSETRACKERS[ i ], event, parentGPoints );
+                updatePointersLeave( MOUSETRACKERS[ i ], event, parentGPoints );
             }
         }
 
@@ -2306,12 +2434,10 @@
      * @private
      * @inner
      */
-    function onPointerOver( tracker, event ) {
+    function onPointerEnter( tracker, event ) {
         var gPoint;
 
-        if ( event.currentTarget === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
+        //$.console.log('pointerenter ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));
-            return;
-        }
 
         gPoint = {
             id: event.pointerId,
@@ -2329,12 +2455,10 @@
      * @private
      * @inner
      */
-    function onPointerOut( tracker, event ) {
+    function onPointerLeave( tracker, event ) {
         var gPoint;
 
-        if ( event.currentTarget === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
+        //$.console.log('pointerleave ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));
-            return;
-        }
 
         gPoint = {
             id: event.pointerId,
@@ -2344,7 +2468,57 @@
             currentTime: $.now()
         };
 
-        updatePointersExit( tracker, event, [ gPoint ] );
+        updatePointersLeave( tracker, event, [ gPoint ] );
+    }
+
+
+    /**
+     * @private
+     * @inner
+     */
+    function onPointerOver( tracker, event ) {
+        var gPoint;
+
+        $.console.log('pointerover ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));
+
+        //if ( event.currentTarget === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
+        //    return;
+        //}
+
+        gPoint = {
+            id: event.pointerId,
+            type: getPointerType( event ),
+            isPrimary: event.isPrimary,
+            currentPos: getMouseAbsolute( event ),
+            currentTime: $.now()
+        };
+
+        updatePointersOver( tracker, event, [ gPoint ] );
+    }
+
+
+    /**
+     * @private
+     * @inner
+     */
+    function onPointerOut( tracker, event ) {
+        var gPoint;
+
+        $.console.log('pointerout ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));
+
+        //if ( event.currentTarget === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
+        //    return;
+        //}
+
+        gPoint = {
+            id: event.pointerId,
+            type: getPointerType( event ),
+            isPrimary: event.isPrimary,
+            currentPos: getMouseAbsolute( event ),
+            currentTime: $.now()
+        };
+
+        updatePointersOut( tracker, event, [ gPoint ] );
     }
 
 
@@ -2568,8 +2742,7 @@
             i,
             gPointCount = gPoints.length,
             curGPoint,
-            updateGPoint,
+            updateGPoint;
-            propagate;
 
         for ( i = 0; i < gPointCount; i++ ) {
             curGPoint = gPoints[ i ];
@@ -2592,9 +2765,129 @@
                 startTrackingPointer( pointsList, curGPoint );
             }
 
-            // Enter
+            // Enter (doesn't bubble and not cancelable)
             if ( tracker.enterHandler ) {
-                propagate = tracker.enterHandler(
+                tracker.enterHandler(
+                    {
+                        eventSource:          tracker,
+                        pointerType:          curGPoint.type,
+                        position:             getPointRelativeToAbsolute( curGPoint.currentPos, tracker.element ),
+                        buttons:              pointsList.buttons,
+                        pointers:             tracker.getActivePointerCount(),
+                        insideElementPressed: curGPoint.insideElementPressed,
+                        buttonDownAny:        pointsList.buttons !== 0,
+                        isTouchEvent:         curGPoint.type === 'touch',
+                        originalEvent:        event,
+                        userData:             tracker.userData
+                    }
+                );
+            }
+        }
+    }
+
+
+    /**
+     * @function
+     * @private
+     * @inner
+     * @param {OpenSeadragon.MouseTracker} tracker
+     *     A reference to the MouseTracker instance.
+     * @param {Object} event
+     *     A reference to the originating DOM event.
+     * @param {Array.<OpenSeadragon.MouseTracker.GesturePoint>} gPoints
+     *      Gesture points associated with the event.
+     */
+    function updatePointersLeave( tracker, event, gPoints ) {
+        var pointsList = tracker.getActivePointersListByType(gPoints[0].type),
+            i,
+            gPointCount = gPoints.length,
+            curGPoint,
+            updateGPoint,
+            dispatchEventObj;
+
+        for ( i = 0; i < gPointCount; i++ ) {
+            curGPoint = gPoints[ i ];
+            updateGPoint = pointsList.getById( curGPoint.id );
+
+            if ( updateGPoint ) {
+                // Already tracking the pointer. If captured then update it, else stop tracking it
+                if ( updateGPoint.captured ) {
+                    updateGPoint.insideElement = false;
+                    updateGPoint.lastPos = updateGPoint.currentPos;
+                    updateGPoint.lastTime = updateGPoint.currentTime;
+                    updateGPoint.currentPos = curGPoint.currentPos;
+                    updateGPoint.currentTime = curGPoint.currentTime;
+                } else {
+                    stopTrackingPointer( pointsList, updateGPoint );
+                }
+
+                curGPoint = updateGPoint;
+            }
+
+            // Leave (doesn't bubble and not cancelable)
+            //   Note: exitHandler is deprecated, replaced by leaveHandler
+            if ( tracker.leaveHandler || tracker.exitHandler ) {
+                dispatchEventObj = {
+                    eventSource:          tracker,
+                    pointerType:          curGPoint.type,
+                    position:             curGPoint.currentPos && getPointRelativeToAbsolute( curGPoint.currentPos, tracker.element ),
+                    buttons:              pointsList.buttons,
+                    pointers:             tracker.getActivePointerCount(),
+                    insideElementPressed: updateGPoint ? updateGPoint.insideElementPressed : false,
+                    buttonDownAny:        pointsList.buttons !== 0,
+                    isTouchEvent:         curGPoint.type === 'touch',
+                    originalEvent:        event,
+                    userData:             tracker.userData
+                };
+
+                if ( tracker.leaveHandler ) {
+                    tracker.leaveHandler( dispatchEventObj );
+                }
+                if ( tracker.exitHandler ) {
+                    tracker.exitHandler( dispatchEventObj );
+                }
+            }
+        }
+    }
+
+
+    /**
+     * @function
+     * @private
+     * @inner
+     * @param {OpenSeadragon.MouseTracker} tracker
+     *     A reference to the MouseTracker instance.
+     * @param {Object} event
+     *     A reference to the originating DOM event.
+     * @param {Array.<OpenSeadragon.MouseTracker.GesturePoint>} gPoints
+     *      Gesture points associated with the event.
+     */
+    function updatePointersOver( tracker, event, gPoints ) {
+        var pointsList,
+            i,
+            gPointCount,
+            curGPoint,
+            updateGPoint,
+            propagate;
+
+        if ( tracker.overHandler ) {
+            pointsList = tracker.getActivePointersListByType( gPoints[ 0 ].type );
+            gPointCount = gPoints.length;
+
+            for ( i = 0; i < gPointCount; i++ ) {
+                curGPoint = gPoints[ i ];
+                updateGPoint = pointsList.getById( curGPoint.id );
+
+                if ( updateGPoint ) {
+                    curGPoint = updateGPoint;
+                } else {
+                    //curGPoint.captured = false; // Tracked by updatePointersEnter
+                    curGPoint.insideElementPressed = false;
+                    //curGPoint.insideElement = true; // Tracked by updatePointersEnter
+                }
+
+                // Over
+                propagate = tracker.overHandler(
                     {
                         eventSource:          tracker,
                         pointerType:          curGPoint.type,
@@ -2616,7 +2909,6 @@
         }
     }
 
-
     /**
      * @function
      * @private
@@ -2628,37 +2920,28 @@
      * @param {Array.<OpenSeadragon.MouseTracker.GesturePoint>} gPoints
      *      Gesture points associated with the event.
      */
-    function updatePointersExit( tracker, event, gPoints ) {
+    function updatePointersOut( tracker, event, gPoints ) {
-        var pointsList = tracker.getActivePointersListByType(gPoints[0].type),
+        var pointsList,
             i,
-            gPointCount = gPoints.length,
+            gPointCount,
             curGPoint,
             updateGPoint,
             propagate;
 
+        if ( tracker.outHandler ) {
+            pointsList = tracker.getActivePointersListByType(gPoints[0].type);
+            gPointCount = gPoints.length;
+
             for ( i = 0; i < gPointCount; i++ ) {
                 curGPoint = gPoints[ i ];
                 updateGPoint = pointsList.getById( curGPoint.id );
 
                 if ( updateGPoint ) {
-                // Already tracking the pointer. If captured then update it, else stop tracking it
-                if ( updateGPoint.captured ) {
-                    updateGPoint.insideElement = false;
-                    updateGPoint.lastPos = updateGPoint.currentPos;
-                    updateGPoint.lastTime = updateGPoint.currentTime;
-                    updateGPoint.currentPos = curGPoint.currentPos;
-                    updateGPoint.currentTime = curGPoint.currentTime;
-                } else {
-                    stopTrackingPointer( pointsList, updateGPoint );
-                }
-
                     curGPoint = updateGPoint;
                 }
 
-            // Exit
+                // Out
-            if ( tracker.exitHandler ) {
+                propagate = tracker.outHandler( {
-                propagate = tracker.exitHandler(
-                    {
                     eventSource:          tracker,
                     pointerType:          curGPoint.type,
                     position:             curGPoint.currentPos && getPointRelativeToAbsolute( curGPoint.currentPos, tracker.element ),
@@ -2670,9 +2953,7 @@
                     originalEvent:        event,
                     preventDefaultAction: false,
                     userData:             tracker.userData
-                    }
+                } );
-                );
-
                 if ( propagate === false ) {
                     $.cancelEvent( event );
                 }
@@ -3326,7 +3607,7 @@
      */
     function updatePointersCancel( tracker, event, gPoints ) {
         updatePointersUp( tracker, event, gPoints, 0 );
-        updatePointersExit( tracker, event, gPoints );
+        updatePointersLeave( tracker, event, gPoints );
     }
 
 
@@ -3367,7 +3648,7 @@
      * @function
      * @private
      * @inner
-     * @returns {Boolean} True if the target has access rights to events, otherwise false.
+     * @returns {Boolean} True if the target supports DOM Level 2 event subscription methods, otherwise false.
      */
     function canAccessEvents (target) {
         try {

src/navigator.js

@@ -221,6 +221,7 @@ $.Navigator = function( options ){
     // Remove the base class' (Viewer's) innerTracker and replace it with our own
     this.innerTracker.destroy();
     this.innerTracker = new $.MouseTracker({
+        userData:        'Navigator.innerTracker',
         element:         this.element,
         dragHandler:     $.delegate( this, onCanvasDrag ),
         clickHandler:    $.delegate( this, onCanvasClick ),

src/openseadragon.js

@@ -917,6 +917,58 @@ function OpenSeadragon( options ){
         return isTainted;
     };
 
+    /**
+     * True if the browser supports the EventTarget.removeEventListener() method
+     * @member {Boolean} supportsAddEventListener
+     * @memberof OpenSeadragon
+     */
+    $.supportsAddEventListener = (function () {
+        return !!(document.documentElement.addEventListener && document.addEventListener);
+    }());
+
+    /**
+     * True if the browser supports the EventTarget.removeEventListener() method
+     * @member {Boolean} supportsRemoveEventListener
+     * @memberof OpenSeadragon
+     */
+    $.supportsRemoveEventListener = (function () {
+        return !!(document.documentElement.removeEventListener && document.removeEventListener);
+    }());
+
+    /**
+     * True if the browser supports the newer EventTarget.addEventListener options argument
+     * @member {Boolean} supportsEventListenerOptions
+     * @memberof OpenSeadragon
+     */
+    $.supportsEventListenerOptions = (function () {
+        var supported = 0;
+
+        if ( $.supportsAddEventListener ) {
+            try {
+                var options = {
+                    get capture() {
+                        supported++;
+                        return false;
+                    },
+                    get once() {
+                        supported++;
+                        return false;
+                    },
+                    get passive() {
+                        supported++;
+                        return false;
+                    }
+                };
+                window.addEventListener("test", null, options);
+                window.removeEventListener("test", null, options);
+            } catch ( e ) {
+                supported = 0;
+            }
+        }
+
+        return supported >= 3;
+    }());
+
     /**
      * A ratio comparing the device screen's pixel density to the canvas's backing store pixel density,
      * clamped to a minimum of 1. Defaults to 1 if canvas isn't supported by the browser.
@@ -942,7 +994,7 @@ function OpenSeadragon( options ){
 
 /**
  *  This closure defines all static methods available to the OpenSeadragon
- *  namespace.  Many, if not most, are taked directly from jQuery for use
+ *  namespace.  Many, if not most, are taken directly from jQuery for use
  *  to simplify and reduce common programming patterns.  More static methods
  *  from jQuery may eventually make their way into this though we are
  *  attempting to avoid an explicit dependency on jQuery only because
@@ -1315,6 +1367,8 @@ function OpenSeadragon( options ){
          * @property {Number} SAFARI
          * @property {Number} CHROME
          * @property {Number} OPERA
+         * @property {Number} EDGE
+         * @property {Number} CHROMEEDGE
          */
         BROWSERS: {
             UNKNOWN:    0,
@@ -1322,7 +1376,9 @@ function OpenSeadragon( options ){
             FIREFOX:    2,
             SAFARI:     3,
             CHROME:     4,
-            OPERA:      5
+            OPERA:      5,
+            EDGE:       6,
+            CHROMEEDGE: 7
         },
 
 
@@ -1978,6 +2034,34 @@ function OpenSeadragon( options ){
             element.className = newClasses.join(' ');
         },
 
+        /**
+         * COnvert passed addEventListener() options to boolean or options object,
+         * depending on browser support.
+         * @function
+         * @param {Boolean|Object} [options] Boolean useCapture, or if [supportsEventListenerOptions]{@link OpenSeadragon.supportsEventListenerOptions}, can be an object
+         * @param {Boolean} [options.capture]
+         * @param {Boolean} [options.passive]
+         * @param {Boolean} [options.once]
+         * @return {String} The protocol (http:, https:, file:, ftp: ...)
+         */
+        normalizeEventListenerOptions: function (options) {
+            var opts;
+            if ( typeof options !== 'undefined' ) {
+                if ( typeof options === 'boolean' ) {
+                    // Legacy Boolean useCapture
+                    opts = $.supportsEventListenerOptions ? { capture: options } : options;
+                } else {
+                    // Options object
+                    opts = $.supportsEventListenerOptions ? options :
+                        ( ( typeof options.capture !== 'undefined' ) ? options.capture : false );
+                }
+            } else {
+                // No options specified - Legacy optional useCapture argument
+                //   (for IE, first supported on version 9, so we'll pass a Boolean)
+                opts = $.supportsEventListenerOptions ? { capture: false } : false;
+            }
+            return opts;
+        },
 
         /**
          * Adds an event listener for the given element, eventName and handler.
@@ -1985,16 +2069,23 @@ function OpenSeadragon( options ){
          * @param {Element|String} element
          * @param {String} eventName
          * @param {Function} handler
-         * @param {Boolean} [useCapture]
+         * @param {Boolean|Object} [options] Boolean useCapture, or if [supportsEventListenerOptions]{@link OpenSeadragon.supportsEventListenerOptions}, can be an object
+         * @param {Boolean} [options.capture]
+         * @param {Boolean} [options.passive]
+         * @param {Boolean} [options.once]
          */
+        // undefined - false or {capture: false}
+        // bool - bool or (capture: bool}
+        // obje - obje.capture or obje
         addEvent: (function () {
-            if ( window.addEventListener ) {
+            if ( $.supportsAddEventListener ) {
-                return function ( element, eventName, handler, useCapture ) {
+                return function ( element, eventName, handler, options ) {
+                    options = $.normalizeEventListenerOptions(options);
                     element = $.getElement( element );
-                    element.addEventListener( eventName, handler, useCapture );
+                    element.addEventListener( eventName, handler, options );
                 };
-            } else if ( window.attachEvent ) {
+            } else if ( document.documentElement.attachEvent && document.attachEvent ) {
-                return function ( element, eventName, handler, useCapture ) {
+                return function ( element, eventName, handler ) {
                     element = $.getElement( element );
                     element.attachEvent( 'on' + eventName, handler );
                 };
@@ -2011,16 +2102,18 @@ function OpenSeadragon( options ){
          * @param {Element|String} element
          * @param {String} eventName
          * @param {Function} handler
-         * @param {Boolean} [useCapture]
+         * @param {Boolean|Object} [options] Boolean useCapture, or if [supportsEventListenerOptions]{@link OpenSeadragon.supportsEventListenerOptions}, can be an object
+         * @param {Boolean} [options.capture]
          */
         removeEvent: (function () {
-            if ( window.removeEventListener ) {
+            if ( $.supportsRemoveEventListener ) {
-                return function ( element, eventName, handler, useCapture ) {
+                return function ( element, eventName, handler, options ) {
+                    options = $.normalizeEventListenerOptions(options);
                     element = $.getElement( element );
-                    element.removeEventListener( eventName, handler, useCapture );
+                    element.removeEventListener( eventName, handler, options );
                 };
-            } else if ( window.detachEvent ) {
+            } else if ( document.documentElement.detachEvent && document.detachEvent ) {
-                return function( element, eventName, handler, useCapture ) {
+                return function( element, eventName, handler ) {
                     element = $.getElement( element );
                     element.detachEvent( 'on' + eventName, handler );
                 };
@@ -2049,7 +2142,7 @@ function OpenSeadragon( options ){
                     event = $.getEvent( event );
                     // legacy for preventing default
                     event.cancel = true;
-                    // IE for preventing default
+                    // IE < 9 for preventing default
                     event.returnValue = false;
                 };
             }
@@ -2058,7 +2151,39 @@ function OpenSeadragon( options ){
 
 
         /**
-         * Stops the propagation of the event up the DOM.
+         * Returns true if {@link OpenSeadragon.cancelEvent|cancelEvent} has been called on
+         * the event, otherwise returns false.
+         * @function
+         * @param {Event} [event]
+         */
+        eventIsCanceled: function( event ) {
+            event = $.getEvent( event );
+
+            if ( event.preventDefault ) {
+                $.eventIsCanceled = function( event ){
+                    // W3C
+                    return event.defaultPrevented;
+                };
+            } else {
+                $.eventIsCanceled = function( event ){
+                    event = $.getEvent( event );
+                    if ( typeof event.returnValue !== 'undefined' ) {
+                        // IE < 9
+                        return !event.returnValue;
+                    } else if ( typeof event.cancel !== 'undefined' ) {
+                        // legacy
+                        return event.cancel;
+                    } else {
+                        return false;
+                    }
+                };
+            }
+            return $.eventIsCanceled( event );
+        },
+
+
+        /**
+         * Stops the propagation of the event through the DOM in the capturing and bubbling phases.
          * @function
          * @param {Event} [event]
          */
@@ -2071,7 +2196,7 @@ function OpenSeadragon( options ){
                     event.stopPropagation();
                 };
             } else {
-                // IE for stopping propagation
+                // IE < 9 for stopping propagation
                 $.stopEvent = function( event ){
                     event = $.getEvent( event );
                     event.cancelBubble = true;
@@ -2569,7 +2694,17 @@ function OpenSeadragon( options ){
                 break;
             case "Netscape":
                 if (window.addEventListener) {
-                    if ( ua.indexOf( "Firefox" ) >= 0 ) {
+                    if ( ua.indexOf( "Edge" ) >= 0 ) {
+                        $.Browser.vendor = $.BROWSERS.EDGE;
+                        $.Browser.version = parseFloat(
+                            ua.substring( ua.indexOf( "Edge" ) + 5 )
+                        );
+                    } else if ( ua.indexOf( "Edg" ) >= 0 ) {
+                        $.Browser.vendor = $.BROWSERS.CHROMEEDGE;
+                        $.Browser.version = parseFloat(
+                            ua.substring( ua.indexOf( "Edg" ) + 4 )
+                        );
+                    } else if ( ua.indexOf( "Firefox" ) >= 0 ) {
                         $.Browser.vendor = $.BROWSERS.FIREFOX;
                         $.Browser.version = parseFloat(
                             ua.substring( ua.indexOf( "Firefox" ) + 8 )

src/referencestrip.js

@@ -120,11 +120,12 @@ $.ReferenceStrip = function ( options ) {
 
     this.viewer = viewer;
     this.innerTracker = new $.MouseTracker( {
+        userData:       'ReferenceStrip.innerTracker',
         element:        this.element,
         dragHandler:    $.delegate( this, onStripDrag ),
         scrollHandler:  $.delegate( this, onStripScroll ),
         enterHandler:   $.delegate( this, onStripEnter ),
-        exitHandler:    $.delegate( this, onStripExit ),
+        leaveHandler:   $.delegate( this, onStripLeave ),
         keyDownHandler: $.delegate( this, onKeyDown ),
         keyHandler:     $.delegate( this, onKeyPress )
     } );
@@ -196,6 +197,7 @@ $.ReferenceStrip = function ( options ) {
         $.setElementTouchActionNone( element );
 
         element.innerTracker = new $.MouseTracker( {
+            userData:           'ReferenceStrip.TileSource.innerTracker',
             element:            element,
             clickTimeThreshold: this.clickTimeThreshold,
             clickDistThreshold: this.clickDistThreshold,
@@ -475,6 +477,7 @@ function loadPanels( strip, viewerSize, scroll ) {
 
             // TODO: What is this for? Future keyboard navigation support?
             miniViewer.displayRegion.innerTracker = new $.MouseTracker( {
+                userData:     'ReferenceStrip.miniViewer.innerTracker',
                 element:       miniViewer.displayRegion,
                 startDisabled: true
             } );
@@ -524,7 +527,7 @@ function onStripEnter( event ) {
  * @inner
  * @function
  */
-function onStripExit( event ) {
+function onStripLeave( event ) {
     var element = event.eventSource.element;
 
     if ( 'horizontal' === this.scroll ) {

src/viewer.js

@@ -280,6 +280,7 @@ $.Viewer = function( options ) {
     this.docOverflow    = document.documentElement.style.overflow;
 
     this.innerTracker = new $.MouseTracker({
+        userData:                 'Viewer.innerTracker',
         element:                  this.canvas,
         startDisabled:            !this.mouseNavEnabled,
         clickTimeThreshold:       this.clickTimeThreshold,
@@ -293,7 +294,7 @@ $.Viewer = function( options ) {
         dragHandler:              $.delegate( this, onCanvasDrag ),
         dragEndHandler:           $.delegate( this, onCanvasDragEnd ),
         enterHandler:             $.delegate( this, onCanvasEnter ),
-        exitHandler:              $.delegate( this, onCanvasExit ),
+        leaveHandler:             $.delegate( this, onCanvasLeave ),
         pressHandler:             $.delegate( this, onCanvasPress ),
         releaseHandler:           $.delegate( this, onCanvasRelease ),
         nonPrimaryPressHandler:   $.delegate( this, onCanvasNonPrimaryPress ),
@@ -303,6 +304,7 @@ $.Viewer = function( options ) {
     });
 
     this.outerTracker = new $.MouseTracker({
+        userData:              'Viewer.outerTracker',
         element:               this.container,
         startDisabled:         !this.mouseNavEnabled,
         clickTimeThreshold:    this.clickTimeThreshold,
@@ -310,7 +312,7 @@ $.Viewer = function( options ) {
         dblClickTimeThreshold: this.dblClickTimeThreshold,
         dblClickDistThreshold: this.dblClickDistThreshold,
         enterHandler:          $.delegate( this, onContainerEnter ),
-        exitHandler:           $.delegate( this, onContainerExit )
+        leaveHandler:          $.delegate( this, onContainerLeave )
     });
 
     if( this.toolbar ){
@@ -1099,7 +1101,7 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
             THIS[ this.hash ].fullPage = false;
 
             // mouse will likely be outside now
-            $.delegate( this, onContainerExit )( { } );
+            $.delegate( this, onContainerLeave )( { } );
 
         }
 
@@ -2925,7 +2927,7 @@ function onCanvasEnter( event ) {
     });
 }
 
-function onCanvasExit( event ) {
+function onCanvasLeave( event ) {
 
     if (window.location !== window.parent.location){
         $.MouseTracker.resetAllMouseTrackers();
@@ -3227,7 +3229,7 @@ function onContainerEnter( event ) {
     });
 }
 
-function onContainerExit( event ) {
+function onContainerLeave( event ) {
     if ( event.pointers < 1 ) {
         THIS[ this.hash ].mouseInside = false;
         if ( !THIS[ this.hash ].animating ) {
@@ -3483,7 +3485,7 @@ function doSingleZoomOut() {
 
 function lightUp() {
     this.buttons.emulateEnter();
-    this.buttons.emulateExit();
+    this.buttons.emulateLeave();
 }
 
 
@@ -3503,7 +3505,7 @@ function onFullScreen() {
     }
     // correct for no mouseout event on change
     if ( this.buttons ) {
-        this.buttons.emulateExit();
+        this.buttons.emulateLeave();
     }
     this.fullPageButton.element.focus();
     if ( this.viewport ) {

test/helpers/legacy.mouse.shim.js

@@ -12,12 +12,12 @@
     }
 
     $.MouseTracker.havePointerEvents = false;
-    if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
     $.MouseTracker.subscribeEvents.push( "mouseenter", "mouseleave" );
-        $.MouseTracker.haveMouseEnter = true;
+    if ( $.Browser.vendor !== $.BROWSERS.IE || $.Browser.version > 8 ) {
-    } else {
         $.MouseTracker.subscribeEvents.push( "mouseover", "mouseout" );
-        $.MouseTracker.haveMouseEnter = false;
+        $.MouseTracker.haveMouseOver = true;
+    } else {
+        $.MouseTracker.haveMouseOver = false;
     }
     $.MouseTracker.subscribeEvents.push( "mousedown", "mouseup", "mousemove" );
     if ( 'ontouchstart' in window ) {

test/helpers/test.js

@@ -37,7 +37,7 @@
             };
 
             $canvas
-                .simulate( OpenSeadragon.MouseTracker.haveMouseEnter ? 'mouseenter' : 'mouseover', event )
+                .simulate( 'mouseenter', event )
                 .simulate( 'mousedown', event );
             for ( var i = 0; i < args.dragCount; i++ ) {
                 event.clientX += args.dragDx;
@@ -47,7 +47,7 @@
             }
             $canvas
                 .simulate( 'mouseup', event )
-                .simulate( OpenSeadragon.MouseTracker.haveMouseEnter ? 'mouseleave' : 'mouseout', event );
+                .simulate( 'mouseleave', event );
         },
 
         // ----------

test/modules/events.js

@@ -32,7 +32,7 @@
             offset = $canvas.offset(),
             tracker = viewer.innerTracker,
             origEnterHandler,
-            origExitHandler,
+            origLeaveHandler,
             origPressHandler,
             origReleaseHandler,
             origNonPrimaryPressHandler,
@@ -43,7 +43,7 @@
             origDragHandler,
             origDragEndHandler,
             enterCount,
-            exitCount,
+            leaveCount,
             pressCount,
             releaseCount,
             rightPressCount,
@@ -71,11 +71,11 @@
                     return true;
                 }
             };
-            origExitHandler = tracker.exitHandler;
+            origLeaveHandler = tracker.leaveHandler;
-            tracker.exitHandler = function ( event ) {
+            tracker.leaveHandler = function ( event ) {
-                exitCount++;
+                leaveCount++;
-                if (origExitHandler) {
+                if (origLeaveHandler) {
-                    return origExitHandler( event );
+                    return origLeaveHandler( event );
                 } else {
                     return true;
                 }
@@ -182,7 +182,7 @@
 
         var unhookViewerHandlers = function () {
             tracker.enterHandler = origEnterHandler;
-            tracker.exitHandler = origExitHandler;
+            tracker.leaveHandler = origLeaveHandler;
             tracker.pressHandler = origPressHandler;
             tracker.releaseHandler = origReleaseHandler;
             tracker.moveHandler = origMoveHandler;
@@ -195,21 +195,21 @@
         var simulateEnter = function (x, y) {
             simEvent.clientX = offset.left + x;
             simEvent.clientY = offset.top  + y;
-            $canvas.simulate( OpenSeadragon.MouseTracker.haveMouseEnter ? 'mouseenter' : 'mouseover', simEvent );
+            $canvas.simulate( 'mouseenter', simEvent );
         };
 
         var simulateLeave = function (x, y) {
             simEvent.clientX = offset.left + x;
             simEvent.clientY = offset.top  + y;
             simEvent.relatedTarget = document.body;
-            $canvas.simulate( OpenSeadragon.MouseTracker.haveMouseEnter ? 'mouseleave' : 'mouseout', simEvent );
+            $canvas.simulate( 'mouseleave', simEvent );
         };
 
         //var simulateLeaveFrame = function (x, y) {
         //    simEvent.clientX = offset.left + x;
         //    simEvent.clientY = offset.top  + y;
         //    simEvent.relatedTarget = document.getElementsByTagName("html")[0];
-        //    $canvas.simulate( OpenSeadragon.MouseTracker.haveMouseEnter ? 'mouseleave' : 'mouseout', simEvent );
+        //    $canvas.simulate( 'mouseleave', simEvent );
         //};
 
         var simulateDown = function (x, y) {
@@ -256,7 +256,7 @@
                 clientY: offset.top
             };
             enterCount = 0;
-            exitCount = 0;
+            leaveCount = 0;
             pressCount = 0;
             releaseCount = 0;
             rightPressCount = 0;
@@ -280,8 +280,8 @@
             if ('enterCount' in expected) {
                 assert.equal( enterCount, expected.enterCount, expected.description + 'enterHandler event count matches expected (' + expected.enterCount + ')' );
             }
-            if ('exitCount' in expected) {
+            if ('leaveCount' in expected) {
-                assert.equal( exitCount, expected.exitCount, expected.description + 'exitHandler event count matches expected (' + expected.exitCount + ')' );
+                assert.equal( leaveCount, expected.leaveCount, expected.description + 'leaveHandler event count matches expected (' + expected.leaveCount + ')' );
             }
             if ('pressCount' in expected) {
                 assert.equal( pressCount, expected.pressCount, expected.description + 'pressHandler event count matches expected (' + expected.pressCount + ')' );
@@ -355,7 +355,7 @@
             assessGestureExpectations({
                 description:           'enter-move-release (release in tracked element, press in unknown element):  ',
                 enterCount:            1,
-                exitCount:             0,
+                leaveCount:            0,
                 pressCount:            0,
                 releaseCount:          1,
                 rightPressCount:       0,
@@ -375,16 +375,16 @@
             });
             simulateLeave(-1, -1); // flush tracked pointer
 
-            // enter-move-exit (fly-over)
+            // enter-move-leave (fly-over)
             resetForAssessment();
             simulateEnter(0, 0);
             simulateMove(1, 1, 10);
             simulateMove(-1, -1, 10);
             simulateLeave(-1, -1);
             assessGestureExpectations({
-                description:           'enter-move-exit (fly-over):  ',
+                description:           'enter-move-leave (fly-over):  ',
                 enterCount:            1,
-                exitCount:             1,
+                leaveCount:            1,
                 pressCount:            0,
                 releaseCount:          0,
                 rightPressCount:       0,
@@ -403,15 +403,15 @@
                 //quickClick:            false
             });
 
-            // move-exit (fly-over, no enter event)
+            // move-leave (fly-over, no enter event)
             resetForAssessment();
             simulateMove(1, 1, 10);
             simulateMove(-1, -1, 10);
             simulateLeave(-1, -1);
             assessGestureExpectations({
-                description:           'move-exit (fly-over, no enter event):  ',
+                description:           'move-leave (fly-over, no enter event):  ',
                 enterCount:            0,
-                exitCount:             1,
+                leaveCount:            1,
                 pressCount:            0,
                 releaseCount:          0,
                 rightPressCount:       0,
@@ -430,7 +430,7 @@
                 //quickClick:            false
             });
 
-            // enter-press-release-press-release-exit (primary/left double click)
+            // enter-press-release-press-release-leave (primary/left double click)
             resetForAssessment();
             simulateEnter(0, 0);
             simulateDown(0, 0);
@@ -439,9 +439,9 @@
             simulateUp(0, 0);
             simulateLeave(-1, -1);
             assessGestureExpectations({
-                description:           'enter-press-release-press-release-exit (primary/left double click):  ',
+                description:           'enter-press-release-press-release-leave (primary/left double click):  ',
                 enterCount:            1,
-                exitCount:             1,
+                leaveCount:            1,
                 pressCount:            2,
                 releaseCount:          2,
                 rightPressCount:       0,
@@ -460,16 +460,16 @@
                 //quickClick:            true
             });
 
-            // enter-press-release-exit (primary/left click)
+            // enter-press-release-leave (primary/left click)
             resetForAssessment();
             simulateEnter(0, 0);
             simulateDown(0, 0);
             simulateUp(0, 0);
             simulateLeave(-1, -1);
             assessGestureExpectations({
-                description:           'enter-press-release-exit (primary/left click):  ',
+                description:           'enter-press-release-leave (primary/left click):  ',
                 enterCount:            1,
-                exitCount:             1,
+                leaveCount:            1,
                 pressCount:            1,
                 releaseCount:          1,
                 rightPressCount:       0,
@@ -488,16 +488,16 @@
                 quickClick:            true
             });
 
-            // enter-nonprimarypress-nonprimaryrelease-exit (secondary/right click)
+            // enter-nonprimarypress-nonprimaryrelease-leave (secondary/right click)
             resetForAssessment();
             simulateEnter(0, 0);
             simulateNonPrimaryDown(0, 0, 2);
             simulateNonPrimaryUp(0, 0, 2);
             simulateLeave(-1, -1);
             assessGestureExpectations({
-                description:           'enter-nonprimarypress-nonprimaryrelease-exit (secondary/right click):  ',
+                description:           'enter-nonprimarypress-nonprimaryrelease-leave (secondary/right click):  ',
                 enterCount:            1,
-                exitCount:             1,
+                leaveCount:            1,
                 pressCount:            0,
                 releaseCount:          0,
                 rightPressCount:       1,
@@ -516,16 +516,16 @@
                 //quickClick:            true
             });
 
-            // enter-nonprimarypress-nonprimaryrelease-exit (aux/middle click)
+            // enter-nonprimarypress-nonprimaryrelease-leave (aux/middle click)
             resetForAssessment();
             simulateEnter(0, 0);
             simulateNonPrimaryDown(0, 0, 1);
             simulateNonPrimaryUp(0, 0, 1);
             simulateLeave(-1, -1);
             assessGestureExpectations({
-                description:           'enter-nonprimarypress-nonprimaryrelease-exit (aux/middle click):  ',
+                description:           'enter-nonprimarypress-nonprimaryrelease-leave (aux/middle click):  ',
                 enterCount:            1,
-                exitCount:             1,
+                leaveCount:            1,
                 pressCount:            0,
                 releaseCount:          0,
                 rightPressCount:       0,
@@ -544,7 +544,7 @@
                 //quickClick:            true
             });
 
-            // enter-nonprimarypress-move-nonprimaryrelease-move-exit (secondary/right button drag, release in tracked element)
+            // enter-nonprimarypress-move-nonprimaryrelease-move-leave (secondary/right button drag, release in tracked element)
             resetForAssessment();
             simulateEnter(0, 0);
             simulateNonPrimaryDown(0, 0, 2);
@@ -553,9 +553,9 @@
             simulateMove(-1, -1, 100);
             simulateLeave(-1, -1);
             assessGestureExpectations({
-                description:           'enter-nonprimarypress-move-nonprimaryrelease-move-exit (secondary/right button drag, release in tracked element):  ',
+                description:           'enter-nonprimarypress-move-nonprimaryrelease-move-leave (secondary/right button drag, release in tracked element):  ',
                 enterCount:            1,
-                exitCount:             1,
+                leaveCount:            1,
                 pressCount:            0,
                 releaseCount:          0,
                 rightPressCount:       1,
@@ -574,7 +574,7 @@
                 //quickClick:            false
             });
 
-            // enter-press-move-release-move-exit (drag, release in tracked element)
+            // enter-press-move-release-move-leave (drag, release in tracked element)
             resetForAssessment();
             simulateEnter(0, 0);
             simulateDown(0, 0);
@@ -583,9 +583,9 @@
             simulateMove(-1, -1, 100);
             simulateLeave(-1, -1);
             assessGestureExpectations({
-                description:           'enter-press-move-release-move-exit (drag, release in tracked element):  ',
+                description:           'enter-press-move-release-move-leave (drag, release in tracked element):  ',
                 enterCount:            1,
-                exitCount:             1,
+                leaveCount:            1,
                 pressCount:            1,
                 releaseCount:          1,
                 rightPressCount:       0,
@@ -604,7 +604,7 @@
                 quickClick:            false
             });
 
-            // enter-press-move-exit-move-release (drag, release outside tracked element)
+            // enter-press-move-leave-move-release (drag, release outside tracked element)
             resetForAssessment();
             simulateEnter(0, 0);
             simulateDown(0, 0);
@@ -614,9 +614,9 @@
             simulateMove(-1, -1, 5);
             simulateUp(-5, -5);
             assessGestureExpectations({
-                description:           'enter-press-move-exit-move-release (drag, release outside tracked element):  ',
+                description:           'enter-press-move-leave-move-release (drag, release outside tracked element):  ',
                 enterCount:            1,
-                exitCount:             1,
+                leaveCount:            1,
                 pressCount:            1,
                 releaseCount:          1,
                 rightPressCount:       0,
@@ -635,7 +635,7 @@
                 quickClick:            false
             });
 
-            //// enter-press-move-exit-move-release-outside (drag, release outside iframe)
+            //// enter-press-move-leave-move-release-outside (drag, release outside iframe)
             //resetForAssessment();
             //simulateEnter(0, 0);
             //simulateDown(0, 0);
@@ -644,9 +644,9 @@
             //simulateLeaveFrame(-1, -1);
             //// you don't actually receive the mouseup if you mouseup outside of the document
             //assessGestureExpectations({
-            //    description:           'enter-press-move-exit-move-release-outside (drag, release outside iframe):  ',
+            //    description:           'enter-press-move-leave-move-release-outside (drag, release outside iframe):  ',
             //    enterCount:             1,
-            //    exitCount:             1,
+            //    leaveCount:              1,
             //    pressCount:            1,
             //    releaseCount:          1,
             //    rightPressCount:       0,
@@ -953,7 +953,7 @@
                 dragEndHandler: onMouseTrackerDragEnd,
                 releaseHandler: onMouseTrackerRelease,
                 clickHandler: onMouseTrackerClick,
-                exitHandler: onMouseTrackerExit
+                leaveHandler: onMouseTrackerLeave
             } );
 
             var event = {
@@ -1050,7 +1050,7 @@
             checkOriginalEventReceived( event );
         };
 
-        var onMouseTrackerExit = function ( event ) {
+        var onMouseTrackerLeave = function ( event ) {
             checkOriginalEventReceived( event );
 
             mouseTracker.destroy();

test/modules/navigator.js

@@ -216,7 +216,7 @@
                 clientY: offset.top + locationY
             };
         $canvas
-            .simulate(OpenSeadragon.MouseTracker.haveMouseEnter ? 'mouseenter' : 'mouseover', event)
+            .simulate('mouseenter', event)
             .simulate('mousedown', event)
             .simulate('mouseup', event);
     };