Merge branch 'master' into collections

fixed Conflicts:
	src/viewport.js

changelog.txt

@@ -10,6 +10,8 @@ OPENSEADRAGON CHANGELOG
 * Fix for IIPServer-style urls when using DZI (#413)
 * Fix memory leak while destroying the viewer (#421)
 * Added fitBoundsWithConstraints() to the viewport (#423)
+* Fixed MouseTracker cross-browser issues with tracking pointers over and out of the tracked element (pull request #448, fix for #152, #404, #420, and #427)
+* Fixed incorrect flick direction after image is rotated (#452)
 
 1.1.1:
 

src/button.js

@@ -137,6 +137,7 @@ $.Button = function( options ) {
             this.tooltip;
 
         this.element.style.position = "relative";
+        $.setElementTouchActionNone( this.element );
 
         this.imgGroup.style.position =
         this.imgHover.style.position =

src/buttongroup.js

@@ -80,6 +80,8 @@ $.ButtonGroup = function( options ) {
         }
     }
 
+    $.setElementTouchActionNone( this.element );
+
     /**
      * Tracks mouse/touch/key events accross the group of buttons.
      * @member {OpenSeadragon.MouseTracker} tracker

src/iiiftilesource.js

@@ -98,9 +98,9 @@ $.IIIFTileSource = function( options ){
     }
 
     if ( !options.maxLevel ) {
-        if ( !this.scale_factors ) { 
+        if ( !this.scale_factors ) {
-            options.maxLevel = Number( Math.ceil( Math.log( Math.max( this.width, this.height ), 2 ) ) ); 
+            options.maxLevel = Number( Math.ceil( Math.log( Math.max( this.width, this.height ), 2 ) ) );
-        } else { 
+        } else {
             options.maxLevel = Math.floor( Math.pow( Math.max.apply(null, this.scale_factors), 0.5) );
         }
     }
@@ -128,7 +128,7 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
             return true;
 
         // Version 1.0
-        } else if ( data.profile && 
+        } else if ( data.profile &&
             data.profile.indexOf("http://library.stanford.edu/iiif/image-api/compliance.html") === 0) {
             return true;
         } else if ( data.identifier && data.width && data.height ) {
@@ -166,7 +166,7 @@ $.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSea
     configure: function( data, url ){
         // Try to deduce our version and fake it upwards if needed
         if ( !$.isPlainObject(data) ) {
-            var options = configureFromXml10( data );            
+            var options = configureFromXml10( data );
             options['@context'] = "http://iiif.io/api/image/1.0/context.json";
             options['@id'] = url.replace('/info.xml', '');
             return options;

src/mousetracker.js

@@ -122,28 +122,28 @@
          * @member {Number} clickTimeThreshold
          * @memberof OpenSeadragon.MouseTracker#
          */
-        this.clickTimeThreshold = options.clickTimeThreshold;
+        this.clickTimeThreshold = options.clickTimeThreshold || $.DEFAULT_SETTINGS.clickTimeThreshold;
         /**
          * The maximum distance allowed between a pointer down event and a pointer up event
          * to be treated as a click gesture.
          * @member {Number} clickDistThreshold
          * @memberof OpenSeadragon.MouseTracker#
          */
-        this.clickDistThreshold = options.clickDistThreshold;
+        this.clickDistThreshold = options.clickDistThreshold || $.DEFAULT_SETTINGS.clickDistThreshold;
         /**
          * The number of milliseconds within which two pointer down-up event combinations
          * will be treated as a double-click gesture.
          * @member {Number} dblClickTimeThreshold
          * @memberof OpenSeadragon.MouseTracker#
          */
-        this.dblClickTimeThreshold = options.dblClickTimeThreshold;
+        this.dblClickTimeThreshold = options.dblClickTimeThreshold || $.DEFAULT_SETTINGS.dblClickTimeThreshold;
         /**
          * The maximum distance allowed between two pointer click events
          * to be treated as a click gesture.
          * @member {Number} clickDistThreshold
          * @memberof OpenSeadragon.MouseTracker#
          */
-        this.dblClickDistThreshold = options.dblClickDistThreshold;
+        this.dblClickDistThreshold = options.dblClickDistThreshold || $.DEFAULT_SETTINGS.dblClickDistThreshold;
         this.userData           = options.userData        || null;
         this.stopDelay          = options.stopDelay       || 50;
 
@@ -187,8 +187,6 @@
 
             mouseover:             function ( event ) { onMouseOver( _this, event ); },
             mouseout:              function ( event ) { onMouseOut( _this, event ); },
-            mouseenter:            function ( event ) { onMouseEnter( _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 ); },
@@ -205,10 +203,10 @@
             gesturestart:          function ( event ) { onGestureStart( _this, event ); },
             gesturechange:         function ( event ) { onGestureChange( _this, event ); },
 
-            pointerenter:          function ( event ) { onPointerEnter( _this, event ); },
+            pointerover:           function ( event ) { onPointerOver( _this, event ); },
-            MSPointerEnter:        function ( event ) { onPointerEnter( _this, event ); },
+            MSPointerOver:         function ( event ) { onPointerOver( _this, event ); },
-            pointerleave:          function ( event ) { onPointerLeave( _this, event ); },
+            pointerout:            function ( event ) { onPointerOut( _this, event ); },
-            MSPointerLeave:        function ( event ) { onPointerLeave( _this, event ); },
+            MSPointerOut:          function ( event ) { onPointerOut( _this, event ); },
             pointerdown:           function ( event ) { onPointerDown( _this, event ); },
             MSPointerDown:         function ( event ) { onPointerDown( _this, event ); },
             pointerup:             function ( event ) { onPointerUp( _this, event ); },
@@ -217,6 +215,8 @@
             MSPointerMove:         function ( event ) { onPointerMove( _this, event ); },
             pointercancel:         function ( event ) { onPointerCancel( _this, event ); },
             MSPointerCancel:       function ( event ) { onPointerCancel( _this, event ); },
+            pointerupcaptured:     function ( event ) { onPointerUpCaptured( _this, event ); },
+            pointermovecaptured:   function ( event ) { onPointerMoveCaptured( _this, event ); },
 
             tracking:              false,
 
@@ -226,9 +226,12 @@
             //     of the element (for hover-capable devices) and/or have contact or a button press initiated in the element.
             activePointersLists:   [],
 
-            // Legacy mouse event tracking
+            // Legacy mouse capture tracking
             capturing:             false,
 
+            // Pointer event model capture tracking
+            pointerCaptureCount:   0,
+
             // Tracking for double-click gesture
             lastClickPos:          null,
             dblClickTimeOut:       null,
@@ -816,29 +819,28 @@
 
     if ( window.PointerEvent ) {
         // IE11 and other W3C Pointer Event implementations (see http://www.w3.org/TR/pointerevents)
-        $.MouseTracker.subscribeEvents.push( "pointerenter", "pointerleave", "pointerdown", "pointerup", "pointermove", "pointercancel" );
+        $.MouseTracker.subscribeEvents.push( "pointerover", "pointerout", "pointerdown", "pointerup", "pointermove", "pointercancel" );
         $.MouseTracker.unprefixedPointerEvents = true;
         if( navigator.maxTouchPoints ) {
             $.MouseTracker.maxTouchPoints = navigator.maxTouchPoints;
         } else {
             $.MouseTracker.maxTouchPoints = 0;
         }
-        $.MouseTracker.haveTouchEnter = true;
+        $.MouseTracker.haveTouchEnter = false;
-        $.MouseTracker.haveMouseEnter = true;
+        $.MouseTracker.haveMouseEnter = false;
     } else if ( window.MSPointerEvent ) {
         // IE10
-        $.MouseTracker.subscribeEvents.push( "MSPointerEnter", "MSPointerLeave", "MSPointerDown", "MSPointerUp", "MSPointerMove", "MSPointerCancel" );
+        $.MouseTracker.subscribeEvents.push( "MSPointerOver", "MSPointerOut", "MSPointerDown", "MSPointerUp", "MSPointerMove", "MSPointerCancel" );
         $.MouseTracker.unprefixedPointerEvents = false;
         if( navigator.msMaxTouchPoints ) {
             $.MouseTracker.maxTouchPoints = navigator.msMaxTouchPoints;
         } else {
             $.MouseTracker.maxTouchPoints = 0;
         }
-        $.MouseTracker.haveTouchEnter = true;
+        $.MouseTracker.haveTouchEnter = false;
-        $.MouseTracker.haveMouseEnter = true;
+        $.MouseTracker.haveMouseEnter = false;
     } else {
         // Legacy W3C mouse events
-        // TODO: Favor mouseenter/mouseleave over mouseover/mouseout when Webkit browser support is better
         $.MouseTracker.subscribeEvents.push( "mouseover", "mouseout", "mousedown", "mouseup", "mousemove" );
         $.MouseTracker.haveMouseEnter = false;
         if ( 'ontouchstart' in window ) {
@@ -1072,73 +1074,66 @@
                 );
             }
 
-            releaseMouse( tracker );
             delegate.tracking = false;
         }
     }
 
     /**
-     * Begin capturing mouse events to the tracked element (legacy mouse events only).
+     * Begin capturing pointer events to the tracked element.
      * @private
      * @inner
      */
-    function captureMouse( tracker ) {
+    function capturePointer( tracker, isLegacyMouse ) {
         var delegate = THIS[ tracker.hash ];
 
-        if ( !delegate.capturing ) {
+        delegate.pointerCaptureCount++;
-            if ( $.MouseTracker.supportsMouseCapture ) {
+        //$.console.log('pointerCaptureCount++ ', delegate.pointerCaptureCount);
-                // IE<10, Firefox, other browsers with setCapture()/releaseCapture()
+
-                tracker.element.setCapture( true );
+        if ( delegate.pointerCaptureCount === 1 ) {
-            } else {
+            // We emulate mouse capture by hanging listeners on the window object.
-                // For browsers without setCapture()/releaseCapture(), we emulate mouse capture by hanging listeners on the window object.
+            //    (Note we listen on the capture phase so the captured handlers will get called first)
-                //    (Note we listen on the capture phase so the captured handlers will get called first)
+            $.addEvent(
-                $.addEvent(
+                window,
-                    window,
+                isLegacyMouse ? 'mouseup' : ($.MouseTracker.unprefixedPointerEvents ? 'pointerup' : 'MSPointerUp'),
-                    "mouseup",
+                isLegacyMouse ? delegate.mouseupcaptured : delegate.pointerupcaptured,
-                    delegate.mouseupcaptured,
+                true
-                    true
+            );
-                );
+            $.addEvent(
-                $.addEvent(
+                window,
-                    window,
+                isLegacyMouse ? 'mousemove' : ($.MouseTracker.unprefixedPointerEvents ? 'pointermove' : 'MSPointerMove'),
-                    "mousemove",
+                isLegacyMouse ? delegate.mousemovecaptured : delegate.pointermovecaptured,
-                    delegate.mousemovecaptured,
+                true
-                    true
+            );
-                );
-            }
-            delegate.capturing = true;
         }
     }
 
 
     /**
-     * Stop capturing mouse events to the tracked element (legacy mouse events only).
+     * Stop capturing pointer events to the tracked element.
      * @private
      * @inner
      */
-    function releaseMouse( tracker ) {
+    function releasePointer( tracker, isLegacyMouse ) {
         var delegate = THIS[ tracker.hash ];
 
-        if ( delegate.capturing ) {
+        delegate.pointerCaptureCount--;
-            if ( $.MouseTracker.supportsMouseCapture ) {
+        //$.console.log('pointerCaptureCount-- ', delegate.pointerCaptureCount);
-                // IE<10, Firefox, other browsers with setCapture()/releaseCapture()
+
-                tracker.element.releaseCapture();
+        if ( delegate.pointerCaptureCount === 0 ) {
-            } else {
+            // We emulate mouse capture by hanging listeners on the window object.
-                // For browsers without setCapture()/releaseCapture(), we emulate mouse capture by hanging listeners on the window object.
+            //    (Note we listen on the capture phase so the captured handlers will get called first)
-                //    (Note we listen on the capture phase so the captured handlers will get called first)
+            $.removeEvent(
-                $.removeEvent(
+                window,
-                    window,
+                isLegacyMouse ? 'mousemove' : ($.MouseTracker.unprefixedPointerEvents ? 'pointermove' : 'MSPointerMove'),
-                    "mousemove",
+                isLegacyMouse ? delegate.mousemovecaptured : delegate.pointermovecaptured,
-                    delegate.mousemovecaptured,
+                true
-                    true
+            );
-                );
+            $.removeEvent(
-                $.removeEvent(
+                window,
-                    window,
+                isLegacyMouse ? 'mouseup' : ($.MouseTracker.unprefixedPointerEvents ? 'pointerup' : 'MSPointerUp'),
-                    "mouseup",
+                isLegacyMouse ? delegate.mouseupcaptured : delegate.pointerupcaptured,
-                    delegate.mouseupcaptured,
+                true
-                    true
+            );
-                );
-            }
-            delegate.capturing = false;
         }
     }
 
@@ -1421,7 +1416,7 @@
 
         event = $.getEvent( event );
 
-        if ( this === event.relatedTarget || isParentChild( this, event.relatedTarget ) ) {
+        if ( this === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
             return;
         }
 
@@ -1446,7 +1441,7 @@
 
         event = $.getEvent( event );
 
-        if ( this === event.relatedTarget || isParentChild( this, event.relatedTarget ) ) {
+        if ( this === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
             return;
         }
 
@@ -1462,48 +1457,6 @@
     }
 
 
-    /**
-     * @private
-     * @inner
-     */
-    function onMouseEnter( tracker, event ) {
-        var gPoint;
-
-        event = $.getEvent( event );
-
-        gPoint = {
-            id: $.MouseTracker.mousePointerId,
-            type: 'mouse',
-            isPrimary: true,
-            currentPos: getMouseAbsolute( event ),
-            currentTime: $.now()
-        };
-
-        updatePointersEnter( tracker, event, [ gPoint ] );
-    }
-
-
-    /**
-     * @private
-     * @inner
-     */
-    function onMouseLeave( tracker, event ) {
-        var gPoint;
-
-        event = $.getEvent( event );
-
-        gPoint = {
-            id: $.MouseTracker.mousePointerId,
-            type: 'mouse',
-            isPrimary: true,
-            currentPos: getMouseAbsolute( event ),
-            currentTime: $.now()
-        };
-
-        updatePointersExit( tracker, event, [ gPoint ] );
-    }
-
-
     /**
      * @private
      * @inner
@@ -1523,7 +1476,7 @@
 
         if ( updatePointersDown( tracker, event, [ gPoint ], event.button ) ) {
             $.stopEvent( event );
-            captureMouse( tracker );
+            capturePointer( tracker, true );
         }
 
         if ( tracker.clickHandler || tracker.dblClickHandler || tracker.pressHandler || tracker.dragHandler || tracker.dragEndHandler ) {
@@ -1542,8 +1495,6 @@
 
     /**
      * This handler is attached to the window object (on the capture phase) to emulate mouse capture.
-     * Only triggered in W3C browsers that don't have setCapture/releaseCapture 
-     * methods or don't support the new pointer events model.
      * onMouseUp is still attached to the tracked element, so stop propagation to avoid processing twice.
      *
      * @private
@@ -1573,7 +1524,7 @@
         };
 
         if ( updatePointersUp( tracker, event, [ gPoint ], event.button ) ) {
-            releaseMouse( tracker );
+            releasePointer( tracker, true );
         }
     }
 
@@ -1589,8 +1540,6 @@
     
     /**
      * This handler is attached to the window object (on the capture phase) to emulate mouse capture.
-     * Only triggered in W3C browsers that don't have setCapture/releaseCapture 
-     * methods or don't support the new pointer events model.
      * onMouseMove is still attached to the tracked element, so stop propagation to avoid processing twice.
      *
      * @private
@@ -1810,9 +1759,13 @@
      * @private
      * @inner
      */
-    function onPointerEnter( tracker, event ) {
+    function onPointerOver( tracker, event ) {
         var gPoint;
 
+        if ( this === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
+            return;
+        }
+
         gPoint = {
             id: event.pointerId,
             type: getPointerType( event ),
@@ -1829,9 +1782,13 @@
      * @private
      * @inner
      */
-    function onPointerLeave( tracker, event ) {
+    function onPointerOut( tracker, event ) {
         var gPoint;
 
+        if ( this === event.relatedTarget || isParentChild( event.currentTarget, event.relatedTarget ) ) {
+            return;
+        }
+
         gPoint = {
             id: event.pointerId,
             type: getPointerType( event ),
@@ -1860,11 +1817,7 @@
         };
 
         if ( updatePointersDown( tracker, event, [ gPoint ], event.button ) ) {
-            if ( $.MouseTracker.unprefixedPointerEvents ) {
+            capturePointer( tracker, false );
-                event.currentTarget.setPointerCapture( event.pointerId );
-            } else {
-                event.currentTarget.msSetPointerCapture( event.pointerId );
-            }
             $.stopEvent( event );
         }
 
@@ -1879,6 +1832,31 @@
      * @inner
      */
     function onPointerUp( tracker, event ) {
+        handlePointerUp( tracker, event );
+    }
+
+
+    /**
+     * This handler is attached to the window object (on the capture phase) to emulate mouse capture.
+     * onPointerUp is still attached to the tracked element, so stop propagation to avoid processing twice.
+     *
+     * @private
+     * @inner
+     */
+    function onPointerUpCaptured( tracker, event ) {
+        var pointsList = tracker.getActivePointersListByType( getPointerType( event ) );
+        if ( pointsList.getById( event.pointerId ) ) {
+            handlePointerUp( tracker, event );
+        }
+        $.stopEvent( event );
+    }
+
+
+    /**
+     * @private
+     * @inner
+     */
+    function handlePointerUp( tracker, event ) {
         var gPoint;
 
         gPoint = {
@@ -1890,11 +1868,8 @@
         };
 
         if ( updatePointersUp( tracker, event, [ gPoint ], event.button ) ) {
-            if ( $.MouseTracker.unprefixedPointerEvents ) {
+            releasePointer( tracker, false );
-                event.currentTarget.releasePointerCapture( event.pointerId );
+            //$.stopEvent( event );
-            } else {
-                event.currentTarget.msReleasePointerCapture( event.pointerId );
-            }
         }
     }
 
@@ -1904,6 +1879,31 @@
      * @inner
      */
     function onPointerMove( tracker, event ) {
+        handlePointerMove( tracker, event );
+    }
+
+
+    /**
+     * This handler is attached to the window object (on the capture phase) to emulate mouse capture.
+     * onPointerMove is still attached to the tracked element, so stop propagation to avoid processing twice.
+     *
+     * @private
+     * @inner
+     */
+    function onPointerMoveCaptured( tracker, event ) {
+        var pointsList = tracker.getActivePointersListByType( getPointerType( event ) );
+        if ( pointsList.getById( event.pointerId ) ) {
+            handlePointerMove( tracker, event );
+        }
+        $.stopEvent( event );
+    }
+
+
+    /**
+     * @private
+     * @inner
+     */
+    function handlePointerMove( tracker, event ) {
         // Pointer changed coordinates, button state, pressure, tilt, or contact geometry (e.g. width and height)
         var gPoint;
 
@@ -2216,6 +2216,7 @@
             }
 
             pointsList.contacts++;
+            //$.console.log('contacts++ ', pointsList.contacts);
 
             if ( tracker.dragHandler || tracker.dragEndHandler || tracker.pinchHandler ) {
                 $.MouseTracker.gesturePointVelocityTracker.addPoint( tracker, curGPoint );
@@ -2342,6 +2343,7 @@
                     // Pointer was activated in our element but could have been removed in any element since events are captured to our element
 
                     pointsList.contacts--;
+                    //$.console.log('contacts-- ', pointsList.contacts);
 
                     if ( tracker.dragHandler || tracker.dragEndHandler || tracker.pinchHandler ) {
                         $.MouseTracker.gesturePointVelocityTracker.removePoint( tracker, updateGPoint );

src/navigator.js

@@ -112,6 +112,8 @@ $.Navigator = function( options ){
 
     options.minPixelRatio = this.minPixelRatio = viewer.minPixelRatio;
 
+    $.setElementTouchActionNone( this.element );
+
     this.borderWidth = 2;
     //At some browser magnification levels the display regions lines up correctly, but at some there appears to
     //be a one pixel gap.
@@ -315,17 +317,9 @@ $.extend( $.Navigator.prototype, $.EventSource.prototype, $.Viewer.prototype, /*
  * @function
  */
 function onCanvasClick( event ) {
-    var newBounds,
+    if ( event.quick && this.viewer.viewport ) {
-        viewerPosition,
+        this.viewer.viewport.panTo( this.viewport.pointFromPixel( event.position ) );
-        dimensions;
+        this.viewer.viewport.applyConstraints();
-    if (! this.drag) {
-        if ( this.viewer.viewport ) {
-            this.viewer.viewport.panTo( this.viewport.pointFromPixel( event.position ) );
-            this.viewer.viewport.applyConstraints();
-        }
-    }
-    else {
-        this.drag = false;
     }
 }
 
@@ -336,7 +330,6 @@ function onCanvasClick( event ) {
  */
 function onCanvasDrag( event ) {
     if ( this.viewer.viewport ) {
-        this.drag = true;
         if( !this.panHorizontal ){
             event.delta.x = 0;
         }

src/openseadragon.js

@@ -1579,6 +1579,21 @@ window.OpenSeadragon = window.OpenSeadragon || function( options ){
         },
 
 
+        /**
+         * Sets the specified element's touch-action style attribute to 'none'.
+         * @function
+         * @param {Element|String} element
+         */
+        setElementTouchActionNone: function( element ) {
+            element = $.getElement( element );
+            if ( typeof element.style.touchAction !== 'undefined' ) {
+                element.style.touchAction = 'none';
+            } else if ( typeof element.style.msTouchAction !== 'undefined' ) {
+                element.style.msTouchAction = 'none';
+            }
+        },
+
+
         /**
          * Add the specified CSS class to the element if not present.
          * @function
@@ -2153,7 +2168,7 @@ window.OpenSeadragon = window.OpenSeadragon || function( options ){
                             )
                         );
                     } else {
-                        regex = new RegExp( "Trident/.*rv:([0-9]{1,}[.0-9]{0,}) ");
+                        regex = new RegExp( "Trident/.*rv:([0-9]{1,}[.0-9]{0,})");
                         if ( regex.exec( ua ) !== null ) {
                             $.Browser.vendor = $.BROWSERS.IE;
                             $.Browser.version = parseFloat( RegExp.$1 );

src/referencestrip.js

@@ -114,6 +114,8 @@ $.ReferenceStrip = function ( options ) {
     style.background    = '#000';
     style.position      = 'relative';
 
+    $.setElementTouchActionNone( this.element );
+
     $.setElementOpacity( this.element, 0.8 );
 
     this.viewer = viewer;
@@ -189,6 +191,7 @@ $.ReferenceStrip = function ( options ) {
         element.style.cssFloat      = 'left'; //Firefox
         element.style.styleFloat    = 'left'; //IE
         element.style.padding       = '2px';
+        $.setElementTouchActionNone( element );
 
         element.innerTracker = new $.MouseTracker( {
             element:            element,

src/tilesource.js

@@ -263,7 +263,7 @@ $.TileSource.prototype = /** @lends OpenSeadragon.TileSource.prototype */{
             tiles;
         for( i = this.minLevel; i < this.maxLevel; i++ ){
             tiles = this.getNumTiles( i );
-            tilesPerSide = Math.floor( Math.max( rect.x, rect.y ) / this.getTileSize(i) );            
+            tilesPerSide = Math.floor( Math.max( rect.x, rect.y ) / this.getTileSize(i) );
             if( Math.max( tiles.x, tiles.y ) + 1 >= tilesPerSide ){
                 break;
             }

src/viewer.js

@@ -275,13 +275,8 @@ $.Viewer = function( options ) {
         style.position = "absolute";
         style.top      = "0px";
         style.left     = "0px";
-        // Disable browser default touch handling
-        if (style["touch-action"] !== undefined) {
-            style["touch-action"] = "none";
-        } else if (style["-ms-touch-action"] !== undefined) {
-            style["-ms-touch-action"] = "none";
-        }
     }(this.canvas.style));
+    $.setElementTouchActionNone( this.canvas );
 
     //the container is created through applying the ControlDock constructor above
     this.container.className = "openseadragon-container";
@@ -2385,8 +2380,8 @@ function onCanvasDragEnd( event ) {
     if ( !event.preventDefaultAction && this.viewport ) {
         gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
         if ( gestureSettings.flickEnabled && event.speed >= gestureSettings.flickMinSpeed ) {
-            var amplitudeX = gestureSettings.flickMomentum * ( event.speed * Math.cos( event.direction ) ),
+            var amplitudeX = gestureSettings.flickMomentum * ( event.speed * Math.cos( event.direction - (Math.PI / 180 * this.viewport.degrees) ) ),
-                amplitudeY = gestureSettings.flickMomentum * ( event.speed * Math.sin( event.direction ) ),
+                amplitudeY = gestureSettings.flickMomentum * ( event.speed * Math.sin( event.direction - (Math.PI / 180 * this.viewport.degrees) ) ),
                 center = this.viewport.pixelFromPoint( this.viewport.getCenter( true ) ),
                 target = this.viewport.pointFromPixel( new $.Point( center.x - amplitudeX, center.y - amplitudeY ) );
             if( !this.panHorizontal ) {
@@ -2396,8 +2391,8 @@ function onCanvasDragEnd( event ) {
                 target.y = center.y;
             }
             this.viewport.panTo( target, false );
-            this.viewport.applyConstraints();
         }
+        this.viewport.applyConstraints();
     }
     /**
      * Raised when a mouse or touch drag operation ends on the {@link OpenSeadragon.Viewer#canvas} element.
@@ -2425,15 +2420,6 @@ function onCanvasDragEnd( event ) {
 }
 
 function onCanvasRelease( event ) {
-    var gestureSettings;
-
-    if ( event.insideElementPressed && this.viewport ) {
-        gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
-
-        if ( !gestureSettings.flickEnabled ) {
-            this.viewport.applyConstraints();
-        }
-    }
     /**
      * Raised when the mouse button is released or touch ends on the {@link OpenSeadragon.Viewer#canvas} element.
      *