/*
* OpenSeadragon - MouseTracker
*
* Copyright (C) 2009 CodePlex Foundation
* Copyright (C) 2010-2013 OpenSeadragon contributors
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of CodePlex Foundation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
(function ( $ ) {
// All MouseTracker instances
var MOUSETRACKERS = [];
// dictionary from hash to private properties
var THIS = {};
/**
* @class MouseTracker
* @classdesc Provides simplified handling of common pointer device (mouse, touch, pen, etc.) gestures
* and keyboard events on a specified element.
* @memberof OpenSeadragon
* @param {Object} options
* Allows configurable properties to be entirely specified by passing
* an options object to the constructor. The constructor also supports
* the original positional arguments 'element', 'clickTimeThreshold',
* and 'clickDistThreshold' in that order.
* @param {Element|String} options.element
* A reference to an element or an element id for which the pointer/key
* events will be monitored.
* @param {Boolean} [options.startDisabled=false]
* If true, event tracking on the element will not start until
* {@link OpenSeadragon.MouseTracker.setTracking|setTracking} is called.
* @param {Number} options.clickTimeThreshold
* The number of milliseconds within which a pointer down-up event combination
* will be treated as a click gesture.
* @param {Number} options.clickDistThreshold
* The maximum distance allowed between a pointer down event and a pointer up event
* to be treated as a click gesture.
* @param {Number} options.dblClickTimeThreshold
* The number of milliseconds within which two pointer down-up event combinations
* will be treated as a double-click gesture.
* @param {Number} options.dblClickDistThreshold
* The maximum distance allowed between two pointer click events
* to be treated as a click gesture.
* @param {Number} [options.stopDelay=50]
* The number of milliseconds without pointer move before the stop
* event is fired.
* @param {OpenSeadragon.EventHandler} [options.enterHandler=null]
* An optional handler for pointer enter.
* @param {OpenSeadragon.EventHandler} [options.exitHandler=null]
* An optional handler for pointer exit.
* @param {OpenSeadragon.EventHandler} [options.pressHandler=null]
* An optional handler for pointer press.
* @param {OpenSeadragon.EventHandler} [options.nonPrimaryPressHandler=null]
* An optional handler for pointer non-primary button press.
* @param {OpenSeadragon.EventHandler} [options.releaseHandler=null]
* An optional handler for pointer release.
* @param {OpenSeadragon.EventHandler} [options.nonPrimaryReleaseHandler=null]
* An optional handler for pointer non-primary button release.
* @param {OpenSeadragon.EventHandler} [options.moveHandler=null]
* An optional handler for pointer move.
* @param {OpenSeadragon.EventHandler} [options.scrollHandler=null]
* An optional handler for mouse wheel scroll.
* @param {OpenSeadragon.EventHandler} [options.clickHandler=null]
* An optional handler for pointer click.
* @param {OpenSeadragon.EventHandler} [options.dblClickHandler=null]
* An optional handler for pointer double-click.
* @param {OpenSeadragon.EventHandler} [options.dragHandler=null]
* An optional handler for the drag gesture.
* @param {OpenSeadragon.EventHandler} [options.dragEndHandler=null]
* An optional handler for after a drag gesture.
* @param {OpenSeadragon.EventHandler} [options.pinchHandler=null]
* An optional handler for the pinch gesture.
* @param {OpenSeadragon.EventHandler} [options.keyDownHandler=null]
* An optional handler for keydown.
* @param {OpenSeadragon.EventHandler} [options.keyUpHandler=null]
* An optional handler for keyup.
* @param {OpenSeadragon.EventHandler} [options.keyHandler=null]
* An optional handler for keypress.
* @param {OpenSeadragon.EventHandler} [options.focusHandler=null]
* An optional handler for focus.
* @param {OpenSeadragon.EventHandler} [options.blurHandler=null]
* An optional handler for blur.
* @param {Object} [options.userData=null]
* Arbitrary object to be passed unchanged to any attached handler methods.
*/
$.MouseTracker = function ( options ) {
MOUSETRACKERS.push( this );
var args = arguments;
if ( !$.isPlainObject( options ) ) {
options = {
element: args[ 0 ],
clickTimeThreshold: args[ 1 ],
clickDistThreshold: args[ 2 ]
};
}
this.hash = Math.random(); // An unique hash for this tracker.
/**
* The element for which pointer events are being monitored.
* @member {Element} element
* @memberof OpenSeadragon.MouseTracker#
*/
this.element = $.getElement( options.element );
/**
* The number of milliseconds within which a pointer down-up event combination
* will be treated as a click gesture.
* @member {Number} clickTimeThreshold
* @memberof OpenSeadragon.MouseTracker#
*/
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 || $.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 || $.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 || $.DEFAULT_SETTINGS.dblClickDistThreshold;
/*eslint-disable no-multi-spaces*/
this.userData = options.userData || null;
this.stopDelay = options.stopDelay || 50;
this.enterHandler = options.enterHandler || null;
this.exitHandler = options.exitHandler || null;
this.pressHandler = options.pressHandler || null;
this.nonPrimaryPressHandler = options.nonPrimaryPressHandler || null;
this.releaseHandler = options.releaseHandler || null;
this.nonPrimaryReleaseHandler = options.nonPrimaryReleaseHandler || null;
this.moveHandler = options.moveHandler || null;
this.scrollHandler = options.scrollHandler || null;
this.clickHandler = options.clickHandler || null;
this.dblClickHandler = options.dblClickHandler || null;
this.dragHandler = options.dragHandler || null;
this.dragEndHandler = options.dragEndHandler || null;
this.pinchHandler = options.pinchHandler || null;
this.stopHandler = options.stopHandler || null;
this.keyDownHandler = options.keyDownHandler || null;
this.keyUpHandler = options.keyUpHandler || null;
this.keyHandler = options.keyHandler || null;
this.focusHandler = options.focusHandler || null;
this.blurHandler = options.blurHandler || null;
/*eslint-enable no-multi-spaces*/
//Store private properties in a scope sealed hash map
var _this = this;
/**
* @private
* @property {Boolean} tracking
* Are we currently tracking pointer events for this element.
*/
THIS[ this.hash ] = {
click: function ( event ) { onClick( _this, event ); },
dblclick: function ( event ) { onDblClick( _this, event ); },
keydown: function ( event ) { onKeyDown( _this, event ); },
keyup: function ( event ) { onKeyUp( _this, event ); },
keypress: function ( event ) { onKeyPress( _this, event ); },
focus: function ( event ) { onFocus( _this, event ); },
blur: function ( event ) { onBlur( _this, event ); },
wheel: function ( event ) { onWheel( _this, event ); },
mousewheel: function ( event ) { onMouseWheel( _this, event ); },
DOMMouseScroll: function ( event ) { onMouseWheel( _this, event ); },
MozMousePixelScroll: function ( event ) { onMouseWheel( _this, event ); },
mouseenter: function ( event ) { onMouseEnter( _this, event ); }, // Used on IE8 only
mouseleave: function ( event ) { onMouseLeave( _this, event ); }, // Used on IE8 only
mouseover: function ( event ) { onMouseOver( _this, event ); },
mouseout: function ( event ) { onMouseOut( _this, event ); },
mousedown: function ( event ) { onMouseDown( _this, event ); },
mouseup: function ( event ) { onMouseUp( _this, event ); },
mouseupcaptured: function ( event ) { onMouseUpCaptured( _this, event ); },
mousemove: function ( event ) { onMouseMove( _this, event ); },
mousemovecaptured: function ( event ) { onMouseMoveCaptured( _this, event ); },
touchstart: function ( event ) { onTouchStart( _this, event ); },
touchend: function ( event ) { onTouchEnd( _this, event ); },
touchendcaptured: function ( event ) { onTouchEndCaptured( _this, event ); },
touchmove: function ( event ) { onTouchMove( _this, event ); },
touchmovecaptured: function ( event ) { onTouchMoveCaptured( _this, event ); },
touchcancel: function ( event ) { onTouchCancel( _this, event ); },
gesturestart: function ( event ) { onGestureStart( _this, event ); },
gesturechange: function ( event ) { onGestureChange( _this, event ); },
pointerover: function ( event ) { onPointerOver( _this, event ); },
MSPointerOver: function ( event ) { onPointerOver( _this, event ); },
pointerout: function ( event ) { onPointerOut( _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 ); },
MSPointerUp: function ( event ) { onPointerUp( _this, event ); },
pointermove: function ( event ) { onPointerMove( _this, event ); },
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,
// Active pointers lists. Array of GesturePointList objects, one for each pointer device type.
// GesturePointList objects are added each time a pointer is tracked by a new pointer device type (see getActivePointersListByType()).
// Active pointers are any pointer being tracked for this element which are in the hit-test area
// of the element (for hover-capable devices) and/or have contact or a button press initiated in the element.
activePointersLists: [],
// Tracking for double-click gesture
lastClickPos: null,
dblClickTimeOut: null,
// Tracking for pinch gesture
pinchGPoints: [],
lastPinchDist: 0,
currentPinchDist: 0,
lastPinchCenter: null,
currentPinchCenter: null
};
if ( !options.startDisabled ) {
this.setTracking( true );
}
};
/** @lends OpenSeadragon.MouseTracker.prototype */
$.MouseTracker.prototype = {
/**
* Clean up any events or objects created by the tracker.
* @function
*/
destroy: function () {
var i;
stopTracking( this );
this.element = null;
for ( i = 0; i < MOUSETRACKERS.length; i++ ) {
if ( MOUSETRACKERS[ i ] === this ) {
MOUSETRACKERS.splice( i, 1 );
break;
}
}
THIS[ this.hash ] = null;
delete THIS[ this.hash ];
},
/**
* Are we currently tracking events on this element.
* @deprecated Just use this.tracking
* @function
* @returns {Boolean} Are we currently tracking events on this element.
*/
isTracking: function () {
return THIS[ this.hash ].tracking;
},
/**
* Enable or disable whether or not we are tracking events on this element.
* @function
* @param {Boolean} track True to start tracking, false to stop tracking.
* @returns {OpenSeadragon.MouseTracker} Chainable.
*/
setTracking: function ( track ) {
if ( track ) {
startTracking( this );
} else {
stopTracking( this );
}
//chain
return this;
},
/**
* Returns the {@link OpenSeadragon.MouseTracker.GesturePointList|GesturePointList} for the given pointer device type,
* creating and caching a new {@link OpenSeadragon.MouseTracker.GesturePointList|GesturePointList} if one doesn't already exist for the type.
* @function
* @param {String} type - The pointer device type: "mouse", "touch", "pen", etc.
* @returns {OpenSeadragon.MouseTracker.GesturePointList}
*/
getActivePointersListByType: function ( type ) {
var delegate = THIS[ this.hash ],
i,
len = delegate.activePointersLists.length,
list;
for ( i = 0; i < len; i++ ) {
if ( delegate.activePointersLists[ i ].type === type ) {
return delegate.activePointersLists[ i ];
}
}
list = new $.MouseTracker.GesturePointList( type );
delegate.activePointersLists.push( list );
return list;
},
/**
* Returns the total number of pointers currently active on the tracked element.
* @function
* @returns {Number}
*/
getActivePointerCount: function () {
var delegate = THIS[ this.hash ],
i,
len = delegate.activePointersLists.length,
count = 0;
for ( i = 0; i < len; i++ ) {
count += delegate.activePointersLists[ i ].getLength();
}
return count;
},
/**
* 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.
*/
enterHandler: 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.
*/
exitHandler: 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 {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.
*/
pressHandler: 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.button
* Button which caused the event.
* -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.
* @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 {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.
*/
nonPrimaryPressHandler: 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 {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.insideElementReleased
* True if the cursor inside the tracked element when the button was released.
* @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.
*/
releaseHandler: 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.button
* Button which caused the event.
* -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.
* @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 {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.
*/
nonPrimaryReleaseHandler: 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 {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.
*/
moveHandler: 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.scroll
* The scroll delta for the event.
* @param {Boolean} event.shift
* True if the shift key was pressed during this event.
* @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. Touch devices no longer generate scroll event.</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.
*/
scrollHandler: 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 {Boolean} event.quick
* True only if the clickDistThreshold and clickTimeThreshold are both passed. Useful for ignoring drag events.
* @param {Boolean} event.shift
* True if the shift key was pressed during this event.
* @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.
*/
clickHandler: 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 {Boolean} event.shift
* True if the shift key was pressed during this event.
* @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.
*/
dblClickHandler: 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 {OpenSeadragon.Point} event.delta
* The x,y components of the difference between the current position and the last drag event position. Useful for ignoring or weighting the events.
* @param {Number} event.speed
* Current computed speed, in pixels per second.
* @param {Number} event.direction
* Current computed direction, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.
* @param {Boolean} event.shift
* True if the shift key was pressed during this event.
* @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.
*/
dragHandler: 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.speed
* Speed at the end of a drag gesture, in pixels per second.
* @param {Number} event.direction
* Direction at the end of a drag gesture, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.
* @param {Boolean} event.shift
* True if the shift key was pressed during this event.
* @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.
*/
dragEndHandler: 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 {Array.<OpenSeadragon.MouseTracker.GesturePoint>} event.gesturePoints
* Gesture points associated with the gesture. Velocity data can be found here.
* @param {OpenSeadragon.Point} event.lastCenter
* The previous center point of the two pinch contact points relative to the tracked element.
* @param {OpenSeadragon.Point} event.center
* The center point of the two pinch contact points relative to the tracked element.
* @param {Number} event.lastDistance
* The previous distance between the two pinch contact points in CSS pixels.
* @param {Number} event.distance
* The distance between the two pinch contact points in CSS pixels.
* @param {Boolean} event.shift
* True if the shift key was pressed during this event.
* @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.
*/
pinchHandler: 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 {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.
*/
stopHandler: 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 {Number} event.keyCode
* The key code that was pressed.
* @param {Boolean} event.ctrl
* True if the ctrl key was pressed during this event.
* @param {Boolean} event.shift
* True if the shift key was pressed during this event.
* @param {Boolean} event.alt
* True if the alt key was pressed during this event.
* @param {Boolean} event.meta
* True if the meta key was pressed during this event.
* @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.
*/
keyDownHandler: 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 {Number} event.keyCode
* The key code that was pressed.
* @param {Boolean} event.ctrl
* True if the ctrl key was pressed during this event.
* @param {Boolean} event.shift
* True if the shift key was pressed during this event.
* @param {Boolean} event.alt
* True if the alt key was pressed during this event.
* @param {Boolean} event.meta
* True if the meta key was pressed during this event.
* @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.
*/
keyUpHandler: 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 {Number} event.keyCode
* The key code that was pressed.
* @param {Boolean} event.ctrl
* True if the ctrl key was pressed during this event.
* @param {Boolean} event.shift
* True if the shift key was pressed during this event.
* @param {Boolean} event.alt
* True if the alt key was pressed during this event.
* @param {Boolean} event.meta
* True if the meta key was pressed during this event.
* @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.
*/
keyHandler: 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 {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.
*/
focusHandler: 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 {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.
*/
blurHandler: function () { }
};
/**
* Resets all active mousetrakers. (Added to patch issue #697 "Mouse up outside map will cause "canvas-drag" event to stick")
*
* @private
* @member resetAllMouseTrackers
* @memberof OpenSeadragon.MouseTracker
*/
$.MouseTracker.resetAllMouseTrackers = function(){
for(var i = 0; i < MOUSETRACKERS.length; i++){
if (MOUSETRACKERS[i].isTracking()){
MOUSETRACKERS[i].setTracking(false);
MOUSETRACKERS[i].setTracking(true);
}
}
};
/**
* Provides continuous computation of velocity (speed and direction) of active pointers.
* This is a singleton, used by all MouseTracker instances, as it is unlikely there will ever be more than
* two active gesture pointers at a time.
*
* @private
* @member gesturePointVelocityTracker
* @memberof OpenSeadragon.MouseTracker
*/
$.MouseTracker.gesturePointVelocityTracker = (function () {
var trackerPoints = [],
intervalId = 0,
lastTime = 0;
// Generates a unique identifier for a tracked gesture point
var _generateGuid = function ( tracker, gPoint ) {
return tracker.hash.toString() + gPoint.type + gPoint.id.toString();
};
// Interval timer callback. Computes velocity for all tracked gesture points.
var _doTracking = function () {
var i,
len = trackerPoints.length,
trackPoint,
gPoint,
now = $.now(),
elapsedTime,
distance,
speed;
elapsedTime = now - lastTime;
lastTime = now;
for ( i = 0; i < len; i++ ) {
trackPoint = trackerPoints[ i ];
gPoint = trackPoint.gPoint;
// Math.atan2 gives us just what we need for a velocity vector, as we can simply
// use cos()/sin() to extract the x/y velocity components.
gPoint.direction = Math.atan2( gPoint.currentPos.y - trackPoint.lastPos.y, gPoint.currentPos.x - trackPoint.lastPos.x );
// speed = distance / elapsed time
distance = trackPoint.lastPos.distanceTo( gPoint.currentPos );
trackPoint.lastPos = gPoint.currentPos;
speed = 1000 * distance / ( elapsedTime + 1 );
// Simple biased average, favors the most recent speed computation. Smooths out erratic gestures a bit.
gPoint.speed = 0.75 * speed + 0.25 * gPoint.speed;
}
};
// Public. Add a gesture point to be tracked
var addPoint = function ( tracker, gPoint ) {
var guid = _generateGuid( tracker, gPoint );
trackerPoints.push(
{
guid: guid,
gPoint: gPoint,
lastPos: gPoint.currentPos
} );
// Only fire up the interval timer when there's gesture pointers to track
if ( trackerPoints.length === 1 ) {
lastTime = $.now();
intervalId = window.setInterval( _doTracking, 50 );
}
};
// Public. Stop tracking a gesture point
var removePoint = function ( tracker, gPoint ) {
var guid = _generateGuid( tracker, gPoint ),
i,
len = trackerPoints.length;
for ( i = 0; i < len; i++ ) {
if ( trackerPoints[ i ].guid === guid ) {
trackerPoints.splice( i, 1 );
// Only run the interval timer if theres gesture pointers to track
len--;
if ( len === 0 ) {
window.clearInterval( intervalId );
}
break;
}
}
};
return {
addPoint: addPoint,
removePoint: removePoint
};
} )();
///////////////////////////////////////////////////////////////////////////////
// Pointer event model and feature detection
///////////////////////////////////////////////////////////////////////////////
$.MouseTracker.captureElement = document;
/**
* Detect available mouse wheel event name.
*/
$.MouseTracker.wheelEventName = ( $.Browser.vendor == $.BROWSERS.IE && $.Browser.version > 8 ) ||
( 'onwheel' in document.createElement( 'div' ) ) ? 'wheel' : // Modern browsers support 'wheel'
document.onmousewheel !== undefined ? 'mousewheel' : // Webkit and IE support at least 'mousewheel'
'DOMMouseScroll'; // Assume old Firefox
/**
* Detect legacy mouse capture support.
*/
$.MouseTracker.supportsMouseCapture = (function () {
var divElement = document.createElement( 'div' );
return $.isFunction( divElement.setCapture ) && $.isFunction( divElement.releaseCapture );
}());
/**
* Detect browser pointer device event model(s) and build appropriate list of events to subscribe to.
*/
$.MouseTracker.subscribeEvents = [ "click", "dblclick", "keydown", "keyup", "keypress", "focus", "blur", $.MouseTracker.wheelEventName ];
if( $.MouseTracker.wheelEventName == "DOMMouseScroll" ) {
// Older Firefox
$.MouseTracker.subscribeEvents.push( "MozMousePixelScroll" );
}
// Note: window.navigator.pointerEnable is deprecated on IE 11 and not part of W3C spec.
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.unprefixedPointerEvents = true;
if( navigator.maxTouchPoints ) {
$.MouseTracker.maxTouchPoints = navigator.maxTouchPoints;
} else {
$.MouseTracker.maxTouchPoints = 0;
}
$.MouseTracker.haveMouseEnter = false;
} else if ( window.MSPointerEvent && window.navigator.msPointerEnabled ) {
// IE10
$.MouseTracker.havePointerEvents = true;
$.MouseTracker.subscribeEvents.push( "MSPointerOver", "MSPointerOut", "MSPointerDown", "MSPointerUp", "MSPointerMove", "MSPointerCancel" );
$.MouseTracker.unprefixedPointerEvents = false;
if( navigator.msMaxTouchPoints ) {
$.MouseTracker.maxTouchPoints = navigator.msMaxTouchPoints;
} else {
$.MouseTracker.maxTouchPoints = 0;
}
$.MouseTracker.haveMouseEnter = false;
} else {
// Legacy W3C mouse events
$.MouseTracker.havePointerEvents = false;
if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
$.MouseTracker.subscribeEvents.push( "mouseenter", "mouseleave" );
$.MouseTracker.haveMouseEnter = true;
} else {
$.MouseTracker.subscribeEvents.push( "mouseover", "mouseout" );
$.MouseTracker.haveMouseEnter = false;
}
$.MouseTracker.subscribeEvents.push( "mousedown", "mouseup", "mousemove" );
if ( 'ontouchstart' in window ) {
// iOS, Android, and other W3c Touch Event implementations
// (see http://www.w3.org/TR/touch-events/)
// (see https://developer.apple.com/library/ios/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html)
// (see https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html)
$.MouseTracker.subscribeEvents.push( "touchstart", "touchend", "touchmove", "touchcancel" );
}
if ( 'ongesturestart' in window ) {
// iOS (see https://developer.apple.com/library/ios/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html)
// Subscribe to these to prevent default gesture handling
$.MouseTracker.subscribeEvents.push( "gesturestart", "gesturechange" );
}
$.MouseTracker.mousePointerId = "legacy-mouse";
$.MouseTracker.maxTouchPoints = 10;
}
///////////////////////////////////////////////////////////////////////////////
// Classes and typedefs
///////////////////////////////////////////////////////////////////////////////
/**
* Represents a point of contact on the screen made by a mouse cursor, pen, touch, or other pointer device.
*
* @typedef {Object} GesturePoint
* @memberof OpenSeadragon.MouseTracker
*
* @property {Number} id
* Identifier unique from all other active GesturePoints for a given pointer device.
* @property {String} type
* The pointer device type: "mouse", "touch", "pen", etc.
* @property {Boolean} captured
* True if events for the gesture point are captured to the tracked element.
* @property {Boolean} isPrimary
* True if the gesture point is a master pointer amongst the set of active pointers for each pointer type. True for mouse and primary (first) touch/pen pointers.
* @property {Boolean} insideElementPressed
* True if button pressed or contact point initiated inside the screen area of the tracked element.
* @property {Boolean} insideElement
* True if pointer or contact point is currently inside the bounds of the tracked element.
* @property {Number} speed
* Current computed speed, in pixels per second.
* @property {Number} direction
* Current computed direction, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.
* @property {OpenSeadragon.Point} contactPos
* The initial pointer contact position, relative to the page including any scrolling. Only valid if the pointer has contact (pressed, touch contact, pen contact).
* @property {Number} contactTime
* The initial pointer contact time, in milliseconds. Only valid if the pointer has contact (pressed, touch contact, pen contact).
* @property {OpenSeadragon.Point} lastPos
* The last pointer position, relative to the page including any scrolling.
* @property {Number} lastTime
* The last pointer contact time, in milliseconds.
* @property {OpenSeadragon.Point} currentPos
* The current pointer position, relative to the page including any scrolling.
* @property {Number} currentTime
* The current pointer contact time, in milliseconds.
*/
/**
* @class GesturePointList
* @classdesc Provides an abstraction for a set of active {@link OpenSeadragon.MouseTracker.GesturePoint|GesturePoint} objects for a given pointer device type.
* Active pointers are any pointer being tracked for this element which are in the hit-test area
* of the element (for hover-capable devices) and/or have contact or a button press initiated in the element.
* @memberof OpenSeadragon.MouseTracker
* @param {String} type - The pointer device type: "mouse", "touch", "pen", etc.
*/
$.MouseTracker.GesturePointList = function ( type ) {
this._gPoints = [];
/**
* The pointer device type: "mouse", "touch", "pen", etc.
* @member {String} type
* @memberof OpenSeadragon.MouseTracker.GesturePointList#
*/
this.type = type;
/**
* Current buttons pressed for the device.
* 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.
* @member {Number} buttons
* @memberof OpenSeadragon.MouseTracker.GesturePointList#
*/
this.buttons = 0;
/**
* Current number of contact points (touch points, mouse down, etc.) for the device.
* @member {Number} contacts
* @memberof OpenSeadragon.MouseTracker.GesturePointList#
*/
this.contacts = 0;
/**
* Current number of clicks for the device. Used for multiple click gesture tracking.
* @member {Number} clicks
* @memberof OpenSeadragon.MouseTracker.GesturePointList#
*/
this.clicks = 0;
/**
* Current number of captured pointers for the device.
* @member {Number} captureCount
* @memberof OpenSeadragon.MouseTracker.GesturePointList#
*/
this.captureCount = 0;
};
/** @lends OpenSeadragon.MouseTracker.GesturePointList.prototype */
$.MouseTracker.GesturePointList.prototype = {
/**
* @function
* @returns {Number} Number of gesture points in the list.
*/
getLength: function () {
return this._gPoints.length;
},
/**
* @function
* @returns {Array.<OpenSeadragon.MouseTracker.GesturePoint>} The list of gesture points in the list as an array (read-only).
*/
asArray: function () {
return this._gPoints;
},
/**
* @function
* @param {OpenSeadragon.MouseTracker.GesturePoint} gesturePoint - A gesture point to add to the list.
* @returns {Number} Number of gesture points in the list.
*/
add: function ( gp ) {
return this._gPoints.push( gp );
},
/**
* @function
* @param {Number} id - The id of the gesture point to remove from the list.
* @returns {Number} Number of gesture points in the list.
*/
removeById: function ( id ) {
var i,
len = this._gPoints.length;
for ( i = 0; i < len; i++ ) {
if ( this._gPoints[ i ].id === id ) {
this._gPoints.splice( i, 1 );
break;
}
}
return this._gPoints.length;
},
/**
* @function
* @param {Number} index - The index of the gesture point to retrieve from the list.
* @returns {OpenSeadragon.MouseTracker.GesturePoint|null} The gesture point at the given index, or null if not found.
*/
getByIndex: function ( index ) {
if ( index < this._gPoints.length) {
return this._gPoints[ index ];
}
return null;
},
/**
* @function
* @param {Number} id - The id of the gesture point to retrieve from the list.
* @returns {OpenSeadragon.MouseTracker.GesturePoint|null} The gesture point with the given id, or null if not found.
*/
getById: function ( id ) {
var i,
len = this._gPoints.length;
for ( i = 0; i < len; i++ ) {
if ( this._gPoints[ i ].id === id ) {
return this._gPoints[ i ];
}
}
return null;
},
/**
* @function
* @returns {OpenSeadragon.MouseTracker.GesturePoint|null} The primary gesture point in the list, or null if not found.
*/
getPrimary: function ( id ) {
var i,
len = this._gPoints.length;
for ( i = 0; i < len; i++ ) {
if ( this._gPoints[ i ].isPrimary ) {
return this._gPoints[ i ];
}
}
return null;
}
};
///////////////////////////////////////////////////////////////////////////////
// Utility functions
///////////////////////////////////////////////////////////////////////////////
/**
* Removes all tracked pointers.
* @private
* @inner
*/
function clearTrackedPointers( tracker ) {
var delegate = THIS[ tracker.hash ],
i,
pointerListCount = delegate.activePointersLists.length;
for ( i = 0; i < pointerListCount; i++ ) {
if ( delegate.activePointersLists[ i ].captureCount > 0 ) {
$.removeEvent(
$.MouseTracker.captureElement,
'mousemove',
delegate.mousemovecaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
'mouseup',
delegate.mouseupcaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
$.MouseTracker.unprefixedPointerEvents ? 'pointermove' : 'MSPointerMove',
delegate.pointermovecaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
$.MouseTracker.unprefixedPointerEvents ? 'pointerup' : 'MSPointerUp',
delegate.pointerupcaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
'touchmove',
delegate.touchmovecaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
'touchend',
delegate.touchendcaptured,
true
);
delegate.activePointersLists[ i ].captureCount = 0;
}
}
for ( i = 0; i < pointerListCount; i++ ) {
delegate.activePointersLists.pop();
}
}
/**
* Starts tracking pointer events on the tracked element.
* @private
* @inner
*/
function startTracking( tracker ) {
var delegate = THIS[ tracker.hash ],
event,
i;
if ( !delegate.tracking ) {
for ( i = 0; i < $.MouseTracker.subscribeEvents.length; i++ ) {
event = $.MouseTracker.subscribeEvents[ i ];
$.addEvent(
tracker.element,
event,
delegate[ event ],
false
);
}
clearTrackedPointers( tracker );
delegate.tracking = true;
}
}
/**
* Stops tracking pointer events on the tracked element.
* @private
* @inner
*/
function stopTracking( tracker ) {
var delegate = THIS[ tracker.hash ],
event,
i;
if ( delegate.tracking ) {
for ( i = 0; i < $.MouseTracker.subscribeEvents.length; i++ ) {
event = $.MouseTracker.subscribeEvents[ i ];
$.removeEvent(
tracker.element,
event,
delegate[ event ],
false
);
}
clearTrackedPointers( tracker );
delegate.tracking = false;
}
}
/**
* @private
* @inner
*/
function getCaptureEventParams( tracker, pointerType ) {
var delegate = THIS[ tracker.hash ];
if ( pointerType === 'pointerevent' ) {
return {
upName: $.MouseTracker.unprefixedPointerEvents ? 'pointerup' : 'MSPointerUp',
upHandler: delegate.pointerupcaptured,
moveName: $.MouseTracker.unprefixedPointerEvents ? 'pointermove' : 'MSPointerMove',
moveHandler: delegate.pointermovecaptured
};
} else if ( pointerType === 'mouse' ) {
return {
upName: 'mouseup',
upHandler: delegate.mouseupcaptured,
moveName: 'mousemove',
moveHandler: delegate.mousemovecaptured
};
} else if ( pointerType === 'touch' ) {
return {
upName: 'touchend',
upHandler: delegate.touchendcaptured,
moveName: 'touchmove',
moveHandler: delegate.touchmovecaptured
};
} else {
throw new Error( "MouseTracker.getCaptureEventParams: Unknown pointer type." );
}
}
/**
* Begin capturing pointer events to the tracked element.
* @private
* @inner
*/
function capturePointer( tracker, pointerType, pointerCount ) {
var pointsList = tracker.getActivePointersListByType( pointerType ),
eventParams;
pointsList.captureCount += (pointerCount || 1);
if ( pointsList.captureCount === 1 ) {
if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
tracker.element.setCapture( true );
} else {
eventParams = getCaptureEventParams( tracker, $.MouseTracker.havePointerEvents ? 'pointerevent' : pointerType );
// We emulate mouse capture by hanging listeners on the document object.
// (Note we listen on the capture phase so the captured handlers will get called first)
// eslint-disable-next-line no-use-before-define
if (isInIframe && canAccessEvents(window.top)) {
$.addEvent(
window.top,
eventParams.upName,
eventParams.upHandler,
true
);
}
$.addEvent(
$.MouseTracker.captureElement,
eventParams.upName,
eventParams.upHandler,
true
);
$.addEvent(
$.MouseTracker.captureElement,
eventParams.moveName,
eventParams.moveHandler,
true
);
}
}
}
/**
* Stop capturing pointer events to the tracked element.
* @private
* @inner
*/
function releasePointer( tracker, pointerType, pointerCount ) {
var pointsList = tracker.getActivePointersListByType( pointerType ),
eventParams;
pointsList.captureCount -= (pointerCount || 1);
if ( pointsList.captureCount === 0 ) {
if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
tracker.element.releaseCapture();
} else {
eventParams = getCaptureEventParams( tracker, $.MouseTracker.havePointerEvents ? 'pointerevent' : pointerType );
// We emulate mouse capture by hanging listeners on the document object.
// (Note we listen on the capture phase so the captured handlers will get called first)
// eslint-disable-next-line no-use-before-define
if (isInIframe && canAccessEvents(window.top)) {
$.removeEvent(
window.top,
eventParams.upName,
eventParams.upHandler,
true
);
}
$.removeEvent(
$.MouseTracker.captureElement,
eventParams.moveName,
eventParams.moveHandler,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
eventParams.upName,
eventParams.upHandler,
true
);
}
}
}
/**
* Gets a W3C Pointer Events model compatible pointer type string from a DOM pointer event.
* IE10 used a long integer value, but the W3C specification (and IE11+) use a string "mouse", "touch", "pen", etc.
* @private
* @inner
*/
function getPointerType( event ) {
var pointerTypeStr;
if ( $.MouseTracker.unprefixedPointerEvents ) {
pointerTypeStr = event.pointerType;
} else {
// IE10
// MSPOINTER_TYPE_TOUCH: 0x00000002
// MSPOINTER_TYPE_PEN: 0x00000003
// MSPOINTER_TYPE_MOUSE: 0x00000004
switch( event.pointerType )
{
case 0x00000002:
pointerTypeStr = 'touch';
break;
case 0x00000003:
pointerTypeStr = 'pen';
break;
case 0x00000004:
pointerTypeStr = 'mouse';
break;
default:
pointerTypeStr = '';
}
}
return pointerTypeStr;
}
/**
* @private
* @inner
*/
function getMouseAbsolute( event ) {
return $.getMousePosition( event );
}
/**
* @private
* @inner
*/
function getMouseRelative( event, element ) {
return getPointRelativeToAbsolute( getMouseAbsolute( event ), element );
}
/**
* @private
* @inner
*/
function getPointRelativeToAbsolute( point, element ) {
var offset = $.getElementOffset( element );
return point.minus( offset );
}
/**
* @private
* @inner
*/
function getCenterPoint( point1, point2 ) {
return new $.Point( ( point1.x + point2.x ) / 2, ( point1.y + point2.y ) / 2 );
}
///////////////////////////////////////////////////////////////////////////////
// Device-specific DOM event handlers
///////////////////////////////////////////////////////////////////////////////
/**
* @private
* @inner
*/
function onClick( tracker, event ) {
if ( tracker.clickHandler ) {
$.cancelEvent( event );
}
}
/**
* @private
* @inner
*/
function onDblClick( tracker, event ) {
if ( tracker.dblClickHandler ) {
$.cancelEvent( event );
}
}
/**
* @private
* @inner
*/
function onKeyDown( tracker, event ) {
//$.console.log( "keydown %s %s %s %s %s", event.keyCode, event.charCode, event.ctrlKey, event.shiftKey, event.altKey );
var propagate;
if ( tracker.keyDownHandler ) {
event = $.getEvent( event );
propagate = tracker.keyDownHandler(
{
eventSource: tracker,
keyCode: event.keyCode ? event.keyCode : event.charCode,
ctrl: event.ctrlKey,
shift: event.shiftKey,
alt: event.altKey,
meta: event.metaKey,
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( !propagate ) {
$.cancelEvent( event );
}
}
}
/**
* @private
* @inner
*/
function onKeyUp( tracker, event ) {
//$.console.log( "keyup %s %s %s %s %s", event.keyCode, event.charCode, event.ctrlKey, event.shiftKey, event.altKey );
var propagate;
if ( tracker.keyUpHandler ) {
event = $.getEvent( event );
propagate = tracker.keyUpHandler(
{
eventSource: tracker,
keyCode: event.keyCode ? event.keyCode : event.charCode,
ctrl: event.ctrlKey,
shift: event.shiftKey,
alt: event.altKey,
meta: event.metaKey,
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( !propagate ) {
$.cancelEvent( event );
}
}
}
/**
* @private
* @inner
*/
function onKeyPress( tracker, event ) {
//$.console.log( "keypress %s %s %s %s %s", event.keyCode, event.charCode, event.ctrlKey, event.shiftKey, event.altKey );
var propagate;
if ( tracker.keyHandler ) {
event = $.getEvent( event );
propagate = tracker.keyHandler(
{
eventSource: tracker,
keyCode: event.keyCode ? event.keyCode : event.charCode,
ctrl: event.ctrlKey,
shift: event.shiftKey,
alt: event.altKey,
meta: event.metaKey,
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( !propagate ) {
$.cancelEvent( event );
}
}
}
/**
* @private
* @inner
*/
function onFocus( tracker, event ) {
//console.log( "focus %s", event );
var propagate;
if ( tracker.focusHandler ) {
event = $.getEvent( event );
propagate = tracker.focusHandler(
{
eventSource: tracker,
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
}
/**
* @private
* @inner
*/
function onBlur( tracker, event ) {
//console.log( "blur %s", event );
var propagate;
if ( tracker.blurHandler ) {
event = $.getEvent( event );
propagate = tracker.blurHandler(
{
eventSource: tracker,
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
}
/**
* Handler for 'wheel' events
*
* @private
* @inner
*/
function onWheel( tracker, event ) {
handleWheelEvent( tracker, event, event );
}
/**
* Handler for 'mousewheel', 'DOMMouseScroll', and 'MozMousePixelScroll' events
*
* @private
* @inner
*/
function onMouseWheel( tracker, event ) {
event = $.getEvent( event );
// Simulate a 'wheel' event
var simulatedEvent = {
target: event.target || event.srcElement,
type: "wheel",
shiftKey: event.shiftKey || false,
clientX: event.clientX,
clientY: event.clientY,
pageX: event.pageX ? event.pageX : event.clientX,
pageY: event.pageY ? event.pageY : event.clientY,
deltaMode: event.type == "MozMousePixelScroll" ? 0 : 1, // 0=pixel, 1=line, 2=page
deltaX: 0,
deltaZ: 0
};
// Calculate deltaY
if ( $.MouseTracker.wheelEventName == "mousewheel" ) {
simulatedEvent.deltaY = -event.wheelDelta / $.DEFAULT_SETTINGS.pixelsPerWheelLine;
} else {
simulatedEvent.deltaY = event.detail;
}
handleWheelEvent( tracker, simulatedEvent, event );
}
/**
* Handles 'wheel' events.
* The event may be simulated by the legacy mouse wheel event handler (onMouseWheel()).
*
* @private
* @inner
*/
function handleWheelEvent( tracker, event, originalEvent ) {
var nDelta = 0,
propagate;
// The nDelta variable is gated to provide smooth z-index scrolling
// since the mouse wheel allows for substantial deltas meant for rapid
// y-index scrolling.
// event.deltaMode: 0=pixel, 1=line, 2=page
// TODO: Deltas in pixel mode should be accumulated then a scroll value computed after $.DEFAULT_SETTINGS.pixelsPerWheelLine threshold reached
nDelta = event.deltaY < 0 ? 1 : -1;
if ( tracker.scrollHandler ) {
propagate = tracker.scrollHandler(
{
eventSource: tracker,
pointerType: 'mouse',
position: getMouseRelative( event, tracker.element ),
scroll: nDelta,
shift: event.shiftKey,
isTouchEvent: false,
originalEvent: originalEvent,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( originalEvent );
}
}
}
/**
* @private
* @inner
*/
function isParentChild( parent, child )
{
if ( parent === child ) {
return false;
}
while ( child && child !== parent ) {
child = child.parentNode;
}
return child === parent;
}
/**
* 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',
isPrimary: true,
currentPos: getMouseAbsolute( event ),
currentTime: $.now()
};
updatePointersEnter( tracker, event, [ gPoint ] );
}
/**
* 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',
isPrimary: true,
currentPos: getMouseAbsolute( event ),
currentTime: $.now()
};
updatePointersExit( tracker, event, [ gPoint ] );
}
/**
* Returns a W3C DOM level 3 standard button value given an event.button property:
* -1 == none, 0 == primary/left, 1 == middle, 2 == secondary/right, 3 == X1/back, 4 == X2/forward, 5 == eraser (pen)
* @private
* @inner
*/
function getStandardizedButton( button ) {
if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
// On IE 8, 0 == none, 1 == left, 2 == right, 3 == left and right, 4 == middle, 5 == left and middle, 6 == right and middle, 7 == all three
// TODO: Support chorded (multiple) button presses on IE 8?
if ( button === 1 ) {
return 0;
} else if ( button === 2 ) {
return 2;
} else if ( button === 4 ) {
return 1;
} else {
return -1;
}
} else {
return button;
}
}
/**
* @private
* @inner
*/
function onMouseDown( tracker, event ) {
var gPoint;
event = $.getEvent( event );
gPoint = {
id: $.MouseTracker.mousePointerId,
type: 'mouse',
isPrimary: true,
currentPos: getMouseAbsolute( event ),
currentTime: $.now()
};
if ( updatePointersDown( tracker, event, [ gPoint ], getStandardizedButton( event.button ) ) ) {
$.stopEvent( event );
capturePointer( tracker, 'mouse' );
}
if ( tracker.clickHandler || tracker.dblClickHandler || tracker.pressHandler || tracker.dragHandler || tracker.dragEndHandler ) {
$.cancelEvent( event );
}
}
/**
* @private
* @inner
*/
function onMouseUp( tracker, event ) {
handleMouseUp( tracker, event );
}
/**
* This handler is attached to the window object (on the capture phase) to emulate mouse capture.
* onMouseUp is still attached to the tracked element, so stop propagation to avoid processing twice.
*
* @private
* @inner
*/
function onMouseUpCaptured( tracker, event ) {
handleMouseUp( tracker, event );
$.stopEvent( event );
}
/**
* @private
* @inner
*/
function handleMouseUp( tracker, event ) {
var gPoint;
event = $.getEvent( event );
gPoint = {
id: $.MouseTracker.mousePointerId,
type: 'mouse',
isPrimary: true,
currentPos: getMouseAbsolute( event ),
currentTime: $.now()
};
if ( updatePointersUp( tracker, event, [ gPoint ], getStandardizedButton( event.button ) ) ) {
releasePointer( tracker, 'mouse' );
}
}
/**
* @private
* @inner
*/
function onMouseMove( tracker, event ) {
handleMouseMove( tracker, event );
}
/**
* This handler is attached to the window object (on the capture phase) to emulate mouse capture.
* onMouseMove is still attached to the tracked element, so stop propagation to avoid processing twice.
*
* @private
* @inner
*/
function onMouseMoveCaptured( tracker, event ) {
handleMouseMove( tracker, event );
$.stopEvent( event );
}
/**
* @private
* @inner
*/
function handleMouseMove( tracker, event ) {
var gPoint;
event = $.getEvent( event );
gPoint = {
id: $.MouseTracker.mousePointerId,
type: 'mouse',
isPrimary: true,
currentPos: getMouseAbsolute( event ),
currentTime: $.now()
};
updatePointersMove( tracker, event, [ gPoint ] );
}
/**
* @private
* @inner
*/
function abortTouchContacts( tracker, event, pointsList ) {
var i,
gPointCount = pointsList.getLength(),
abortGPoints = [];
for ( i = 0; i < gPointCount; i++ ) {
abortGPoints.push( pointsList.getByIndex( i ) );
}
if ( abortGPoints.length > 0 ) {
// simulate touchend
updatePointersUp( tracker, event, abortGPoints, 0 ); // 0 means primary button press/release or touch contact
// release pointer capture
pointsList.captureCount = 1;
releasePointer( tracker, 'touch' );
// simulate touchleave
updatePointersExit( tracker, event, abortGPoints );
}
}
/**
* @private
* @inner
*/
function onTouchStart( tracker, event ) {
var time,
i,
j,
touchCount = event.changedTouches.length,
gPoints = [],
parentGPoints,
pointsList = tracker.getActivePointersListByType( 'touch' );
time = $.now();
if ( pointsList.getLength() > event.touches.length - touchCount ) {
$.console.warn('Tracked touch contact count doesn\'t match event.touches.length. Removing all tracked touch pointers.');
abortTouchContacts( tracker, event, pointsList );
}
for ( i = 0; i < touchCount; i++ ) {
gPoints.push( {
id: event.changedTouches[ i ].identifier,
type: 'touch',
// isPrimary not set - let the updatePointers functions determine it
currentPos: getMouseAbsolute( event.changedTouches[ i ] ),
currentTime: time
} );
}
// simulate touchenter on our tracked element
updatePointersEnter( tracker, event, gPoints );
// simulate touchenter on our tracked element's tracked ancestor elements
for ( i = 0; i < MOUSETRACKERS.length; i++ ) {
if ( MOUSETRACKERS[ i ] !== tracker && MOUSETRACKERS[ i ].isTracking() && isParentChild( MOUSETRACKERS[ i ].element, tracker.element ) ) {
parentGPoints = [];
for ( j = 0; j < touchCount; j++ ) {
parentGPoints.push( {
id: event.changedTouches[ j ].identifier,
type: 'touch',
// isPrimary not set - let the updatePointers functions determine it
currentPos: getMouseAbsolute( event.changedTouches[ j ] ),
currentTime: time
} );
}
updatePointersEnter( MOUSETRACKERS[ i ], event, parentGPoints );
}
}
if ( updatePointersDown( tracker, event, gPoints, 0 ) ) { // 0 means primary button press/release or touch contact
$.stopEvent( event );
capturePointer( tracker, 'touch', touchCount );
}
$.cancelEvent( event );
}
/**
* @private
* @inner
*/
function onTouchEnd( tracker, event ) {
handleTouchEnd( tracker, event );
}
/**
* This handler is attached to the window object (on the capture phase) to emulate pointer capture.
* onTouchEnd is still attached to the tracked element, so stop propagation to avoid processing twice.
*
* @private
* @inner
*/
function onTouchEndCaptured( tracker, event ) {
handleTouchEnd( tracker, event );
$.stopEvent( event );
}
/**
* @private
* @inner
*/
function handleTouchEnd( tracker, event ) {
var time,
i,
j,
touchCount = event.changedTouches.length,
gPoints = [],
parentGPoints;
time = $.now();
for ( i = 0; i < touchCount; i++ ) {
gPoints.push( {
id: event.changedTouches[ i ].identifier,
type: 'touch',
// isPrimary not set - let the updatePointers functions determine it
currentPos: getMouseAbsolute( event.changedTouches[ i ] ),
currentTime: time
} );
}
if ( updatePointersUp( tracker, event, gPoints, 0 ) ) {
releasePointer( tracker, 'touch', touchCount );
}
// simulate touchleave on our tracked element
updatePointersExit( tracker, event, gPoints );
// simulate touchleave on our tracked element's tracked ancestor elements
for ( i = 0; i < MOUSETRACKERS.length; i++ ) {
if ( MOUSETRACKERS[ i ] !== tracker && MOUSETRACKERS[ i ].isTracking() && isParentChild( MOUSETRACKERS[ i ].element, tracker.element ) ) {
parentGPoints = [];
for ( j = 0; j < touchCount; j++ ) {
parentGPoints.push( {
id: event.changedTouches[ j ].identifier,
type: 'touch',
// isPrimary not set - let the updatePointers functions determine it
currentPos: getMouseAbsolute( event.changedTouches[ j ] ),
currentTime: time
} );
}
updatePointersExit( MOUSETRACKERS[ i ], event, parentGPoints );
}
}
$.cancelEvent( event );
}
/**
* @private
* @inner
*/
function onTouchMove( tracker, event ) {
handleTouchMove( tracker, event );
}
/**
* This handler is attached to the window object (on the capture phase) to emulate pointer capture.
* onTouchMove is still attached to the tracked element, so stop propagation to avoid processing twice.
*
* @private
* @inner
*/
function onTouchMoveCaptured( tracker, event ) {
handleTouchMove( tracker, event );
$.stopEvent( event );
}
/**
* @private
* @inner
*/
function handleTouchMove( tracker, event ) {
var i,
touchCount = event.changedTouches.length,
gPoints = [];
for ( i = 0; i < touchCount; i++ ) {
gPoints.push( {
id: event.changedTouches[ i ].identifier,
type: 'touch',
// isPrimary not set - let the updatePointers functions determine it
currentPos: getMouseAbsolute( event.changedTouches[ i ] ),
currentTime: $.now()
} );
}
updatePointersMove( tracker, event, gPoints );
$.cancelEvent( event );
}
/**
* @private
* @inner
*/
function onTouchCancel( tracker, event ) {
var pointsList = tracker.getActivePointersListByType('touch');
abortTouchContacts( tracker, event, pointsList );
}
/**
* @private
* @inner
*/
function onGestureStart( tracker, event ) {
event.stopPropagation();
event.preventDefault();
return false;
}
/**
* @private
* @inner
*/
function onGestureChange( tracker, event ) {
event.stopPropagation();
event.preventDefault();
return false;
}
/**
* @private
* @inner
*/
function onPointerOver( tracker, event ) {
var gPoint;
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()
};
updatePointersEnter( tracker, event, [ gPoint ] );
}
/**
* @private
* @inner
*/
function onPointerOut( tracker, event ) {
var gPoint;
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()
};
updatePointersExit( tracker, event, [ gPoint ] );
}
/**
* @private
* @inner
*/
function onPointerDown( tracker, event ) {
var gPoint;
gPoint = {
id: event.pointerId,
type: getPointerType( event ),
isPrimary: event.isPrimary,
currentPos: getMouseAbsolute( event ),
currentTime: $.now()
};
if ( updatePointersDown( tracker, event, [ gPoint ], event.button ) ) {
$.stopEvent( event );
capturePointer( tracker, gPoint.type );
}
if ( tracker.clickHandler || tracker.dblClickHandler || tracker.pressHandler || tracker.dragHandler || tracker.dragEndHandler || tracker.pinchHandler ) {
$.cancelEvent( event );
}
}
/**
* @private
* @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 = {
id: event.pointerId,
type: getPointerType( event ),
isPrimary: event.isPrimary,
currentPos: getMouseAbsolute( event ),
currentTime: $.now()
};
if ( updatePointersUp( tracker, event, [ gPoint ], event.button ) ) {
releasePointer( tracker, gPoint.type );
}
}
/**
* @private
* @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;
gPoint = {
id: event.pointerId,
type: getPointerType( event ),
isPrimary: event.isPrimary,
currentPos: getMouseAbsolute( event ),
currentTime: $.now()
};
updatePointersMove( tracker, event, [ gPoint ] );
}
/**
* @private
* @inner
*/
function onPointerCancel( tracker, event ) {
var gPoint;
gPoint = {
id: event.pointerId,
type: getPointerType( event )
};
updatePointersCancel( tracker, event, [ gPoint ] );
}
///////////////////////////////////////////////////////////////////////////////
// Device-agnostic DOM event handlers
///////////////////////////////////////////////////////////////////////////////
/**
* @function
* @private
* @inner
* @param {OpenSeadragon.MouseTracker.GesturePointList} pointsList
* The GesturePointList to track the pointer in.
* @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint
* Gesture point to track.
* @returns {Number} Number of gesture points in pointsList.
*/
function startTrackingPointer( pointsList, gPoint ) {
// If isPrimary is not known for the pointer then set it according to our rules:
// true if the first pointer in the gesture, otherwise false
if ( !gPoint.hasOwnProperty( 'isPrimary' ) ) {
if ( pointsList.getLength() === 0 ) {
gPoint.isPrimary = true;
} else {
gPoint.isPrimary = false;
}
}
gPoint.speed = 0;
gPoint.direction = 0;
gPoint.contactPos = gPoint.currentPos;
gPoint.contactTime = gPoint.currentTime;
gPoint.lastPos = gPoint.currentPos;
gPoint.lastTime = gPoint.currentTime;
return pointsList.add( gPoint );
}
/**
* @function
* @private
* @inner
* @param {OpenSeadragon.MouseTracker.GesturePointList} pointsList
* The GesturePointList to stop tracking the pointer on.
* @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint
* Gesture point to stop tracking.
* @returns {Number} Number of gesture points in pointsList.
*/
function stopTrackingPointer( pointsList, gPoint ) {
var listLength,
primaryPoint;
if ( pointsList.getById( gPoint.id ) ) {
listLength = pointsList.removeById( gPoint.id );
// If isPrimary is not known for the pointer and we just removed the primary pointer from the list then we need to set another pointer as primary
if ( !gPoint.hasOwnProperty( 'isPrimary' ) ) {
primaryPoint = pointsList.getPrimary();
if ( !primaryPoint ) {
primaryPoint = pointsList.getByIndex( 0 );
if ( primaryPoint ) {
primaryPoint.isPrimary = true;
}
}
}
} else {
listLength = pointsList.getLength();
}
return listLength;
}
/**
* @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 updatePointersEnter( tracker, event, gPoints ) {
var pointsList = tracker.getActivePointersListByType( gPoints[ 0 ].type ),
i,
gPointCount = gPoints.length,
curGPoint,
updateGPoint,
propagate;
for ( i = 0; i < gPointCount; i++ ) {
curGPoint = gPoints[ i ];
updateGPoint = pointsList.getById( curGPoint.id );
if ( updateGPoint ) {
// Already tracking the pointer...update it
updateGPoint.insideElement = true;
updateGPoint.lastPos = updateGPoint.currentPos;
updateGPoint.lastTime = updateGPoint.currentTime;
updateGPoint.currentPos = curGPoint.currentPos;
updateGPoint.currentTime = curGPoint.currentTime;
curGPoint = updateGPoint;
} else {
// Initialize for tracking and add to the tracking list
curGPoint.captured = false;
curGPoint.insideElementPressed = false;
curGPoint.insideElement = true;
startTrackingPointer( pointsList, curGPoint );
}
// Enter
if ( tracker.enterHandler ) {
propagate = 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,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
}
}
/**
* @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 updatePointersExit( tracker, event, gPoints ) {
var pointsList = tracker.getActivePointersListByType(gPoints[0].type),
i,
gPointCount = gPoints.length,
curGPoint,
updateGPoint,
propagate;
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
if ( tracker.exitHandler ) {
propagate = tracker.exitHandler(
{
eventSource: tracker,
pointerType: curGPoint.type,
position: 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,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
}
}
/**
* @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.
* @param {Number} buttonChanged
* The button involved in the event: -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.
* Note on chorded button presses (a button pressed when another button is already pressed): In the W3C Pointer Events model,
* only one pointerdown/pointerup event combo is fired. Chorded button state changes instead fire pointermove events.
*
* @returns {Boolean} True if pointers should be captured to the tracked element, otherwise false.
*/
function updatePointersDown( tracker, event, gPoints, buttonChanged ) {
var delegate = THIS[ tracker.hash ],
propagate,
pointsList = tracker.getActivePointersListByType( gPoints[ 0 ].type ),
i,
gPointCount = gPoints.length,
curGPoint,
updateGPoint;
if ( typeof event.buttons !== 'undefined' ) {
pointsList.buttons = event.buttons;
} else {
if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
if ( buttonChanged === 0 ) {
// Primary
pointsList.buttons += 1;
} else if ( buttonChanged === 1 ) {
// Aux
pointsList.buttons += 4;
} else if ( buttonChanged === 2 ) {
// Secondary
pointsList.buttons += 2;
} else if ( buttonChanged === 3 ) {
// X1 (Back)
pointsList.buttons += 8;
} else if ( buttonChanged === 4 ) {
// X2 (Forward)
pointsList.buttons += 16;
} else if ( buttonChanged === 5 ) {
// Pen Eraser
pointsList.buttons += 32;
}
} else {
if ( buttonChanged === 0 ) {
// Primary
pointsList.buttons |= 1;
} else if ( buttonChanged === 1 ) {
// Aux
pointsList.buttons |= 4;
} else if ( buttonChanged === 2 ) {
// Secondary
pointsList.buttons |= 2;
} else if ( buttonChanged === 3 ) {
// X1 (Back)
pointsList.buttons |= 8;
} else if ( buttonChanged === 4 ) {
// X2 (Forward)
pointsList.buttons |= 16;
} else if ( buttonChanged === 5 ) {
// Pen Eraser
pointsList.buttons |= 32;
}
}
}
// Only capture and track primary button, pen, and touch contacts
if ( buttonChanged !== 0 ) {
// Aux Press
if ( tracker.nonPrimaryPressHandler ) {
propagate = tracker.nonPrimaryPressHandler(
{
eventSource: tracker,
pointerType: gPoints[ 0 ].type,
position: getPointRelativeToAbsolute( gPoints[ 0 ].currentPos, tracker.element ),
button: buttonChanged,
buttons: pointsList.buttons,
isTouchEvent: gPoints[ 0 ].type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
return false;
}
for ( i = 0; i < gPointCount; i++ ) {
curGPoint = gPoints[ i ];
updateGPoint = pointsList.getById( curGPoint.id );
if ( updateGPoint ) {
// Already tracking the pointer...update it
updateGPoint.captured = true;
updateGPoint.insideElementPressed = true;
updateGPoint.insideElement = true;
updateGPoint.contactPos = curGPoint.currentPos;
updateGPoint.contactTime = curGPoint.currentTime;
updateGPoint.lastPos = updateGPoint.currentPos;
updateGPoint.lastTime = updateGPoint.currentTime;
updateGPoint.currentPos = curGPoint.currentPos;
updateGPoint.currentTime = curGPoint.currentTime;
curGPoint = updateGPoint;
} else {
// Initialize for tracking and add to the tracking list (no pointerover or pointermove event occurred before this)
curGPoint.captured = true;
curGPoint.insideElementPressed = true;
curGPoint.insideElement = true;
startTrackingPointer( pointsList, curGPoint );
}
pointsList.contacts++;
//$.console.log('contacts++ ', pointsList.contacts);
if ( tracker.dragHandler || tracker.dragEndHandler || tracker.pinchHandler ) {
$.MouseTracker.gesturePointVelocityTracker.addPoint( tracker, curGPoint );
}
if ( pointsList.contacts === 1 ) {
// Press
if ( tracker.pressHandler ) {
propagate = tracker.pressHandler(
{
eventSource: tracker,
pointerType: curGPoint.type,
position: getPointRelativeToAbsolute( curGPoint.contactPos, tracker.element ),
buttons: pointsList.buttons,
isTouchEvent: curGPoint.type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
} else if ( pointsList.contacts === 2 ) {
if ( tracker.pinchHandler && curGPoint.type === 'touch' ) {
// Initialize for pinch
delegate.pinchGPoints = pointsList.asArray();
delegate.lastPinchDist = delegate.currentPinchDist = delegate.pinchGPoints[ 0 ].currentPos.distanceTo( delegate.pinchGPoints[ 1 ].currentPos );
delegate.lastPinchCenter = delegate.currentPinchCenter = getCenterPoint( delegate.pinchGPoints[ 0 ].currentPos, delegate.pinchGPoints[ 1 ].currentPos );
}
}
}
return true;
}
/**
* @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.
* @param {Number} buttonChanged
* The button involved in the event: -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.
* Note on chorded button presses (a button pressed when another button is already pressed): In the W3C Pointer Events model,
* only one pointerdown/pointerup event combo is fired. Chorded button state changes instead fire pointermove events.
*
* @returns {Boolean} True if pointer capture should be released from the tracked element, otherwise false.
*/
function updatePointersUp( tracker, event, gPoints, buttonChanged ) {
var delegate = THIS[ tracker.hash ],
pointsList = tracker.getActivePointersListByType( gPoints[ 0 ].type ),
propagate,
releasePoint,
releaseTime,
i,
gPointCount = gPoints.length,
curGPoint,
updateGPoint,
releaseCapture = false,
wasCaptured = false,
quick;
if ( typeof event.buttons !== 'undefined' ) {
pointsList.buttons = event.buttons;
} else {
if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 9 ) {
if ( buttonChanged === 0 ) {
// Primary
pointsList.buttons -= 1;
} else if ( buttonChanged === 1 ) {
// Aux
pointsList.buttons -= 4;
} else if ( buttonChanged === 2 ) {
// Secondary
pointsList.buttons -= 2;
} else if ( buttonChanged === 3 ) {
// X1 (Back)
pointsList.buttons -= 8;
} else if ( buttonChanged === 4 ) {
// X2 (Forward)
pointsList.buttons -= 16;
} else if ( buttonChanged === 5 ) {
// Pen Eraser
pointsList.buttons -= 32;
}
} else {
if ( buttonChanged === 0 ) {
// Primary
pointsList.buttons ^= ~1;
} else if ( buttonChanged === 1 ) {
// Aux
pointsList.buttons ^= ~4;
} else if ( buttonChanged === 2 ) {
// Secondary
pointsList.buttons ^= ~2;
} else if ( buttonChanged === 3 ) {
// X1 (Back)
pointsList.buttons ^= ~8;
} else if ( buttonChanged === 4 ) {
// X2 (Forward)
pointsList.buttons ^= ~16;
} else if ( buttonChanged === 5 ) {
// Pen Eraser
pointsList.buttons ^= ~32;
}
}
}
// Only capture and track primary button, pen, and touch contacts
if ( buttonChanged !== 0 ) {
// Aux Release
if ( tracker.nonPrimaryReleaseHandler ) {
propagate = tracker.nonPrimaryReleaseHandler(
{
eventSource: tracker,
pointerType: gPoints[ 0 ].type,
position: getPointRelativeToAbsolute(gPoints[0].currentPos, tracker.element),
button: buttonChanged,
buttons: pointsList.buttons,
isTouchEvent: gPoints[ 0 ].type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
// A primary mouse button may have been released while the non-primary button was down
if (pointsList.contacts > 0 && pointsList.type === 'mouse') {
// Stop tracking the mouse; see https://github.com/openseadragon/openseadragon/pull/1223
pointsList.contacts--;
return true;
}
return false;
}
for ( i = 0; i < gPointCount; i++ ) {
curGPoint = gPoints[ i ];
updateGPoint = pointsList.getById( curGPoint.id );
if ( updateGPoint ) {
// Update the pointer, stop tracking it if not still in this element
if ( updateGPoint.captured ) {
updateGPoint.captured = false;
releaseCapture = true;
wasCaptured = true;
}
updateGPoint.lastPos = updateGPoint.currentPos;
updateGPoint.lastTime = updateGPoint.currentTime;
updateGPoint.currentPos = curGPoint.currentPos;
updateGPoint.currentTime = curGPoint.currentTime;
if ( !updateGPoint.insideElement ) {
stopTrackingPointer( pointsList, updateGPoint );
}
releasePoint = updateGPoint.currentPos;
releaseTime = updateGPoint.currentTime;
if ( wasCaptured ) {
// Pointer was activated in our element but could have been removed in any element since events are captured to our element
pointsList.contacts--;
//$.console.log('contacts-- ', pointsList.contacts);
if ( tracker.dragHandler || tracker.dragEndHandler || tracker.pinchHandler ) {
$.MouseTracker.gesturePointVelocityTracker.removePoint( tracker, updateGPoint );
}
if ( pointsList.contacts === 0 ) {
// Release (pressed in our element)
if ( tracker.releaseHandler ) {
propagate = tracker.releaseHandler(
{
eventSource: tracker,
pointerType: updateGPoint.type,
position: getPointRelativeToAbsolute( releasePoint, tracker.element ),
buttons: pointsList.buttons,
insideElementPressed: updateGPoint.insideElementPressed,
insideElementReleased: updateGPoint.insideElement,
isTouchEvent: updateGPoint.type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
// Drag End
if ( tracker.dragEndHandler && !updateGPoint.currentPos.equals( updateGPoint.contactPos ) ) {
propagate = tracker.dragEndHandler(
{
eventSource: tracker,
pointerType: updateGPoint.type,
position: getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),
speed: updateGPoint.speed,
direction: updateGPoint.direction,
shift: event.shiftKey,
isTouchEvent: updateGPoint.type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
// Click / Double-Click
if ( ( tracker.clickHandler || tracker.dblClickHandler ) && updateGPoint.insideElement ) {
quick = releaseTime - updateGPoint.contactTime <= tracker.clickTimeThreshold &&
updateGPoint.contactPos.distanceTo( releasePoint ) <= tracker.clickDistThreshold;
// Click
if ( tracker.clickHandler ) {
propagate = tracker.clickHandler(
{
eventSource: tracker,
pointerType: updateGPoint.type,
position: getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),
quick: quick,
shift: event.shiftKey,
isTouchEvent: updateGPoint.type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
// Double-Click
if ( tracker.dblClickHandler && quick ) {
pointsList.clicks++;
if ( pointsList.clicks === 1 ) {
delegate.lastClickPos = releasePoint;
/*jshint loopfunc:true*/
delegate.dblClickTimeOut = setTimeout( function() {
pointsList.clicks = 0;
}, tracker.dblClickTimeThreshold );
/*jshint loopfunc:false*/
} else if ( pointsList.clicks === 2 ) {
clearTimeout( delegate.dblClickTimeOut );
pointsList.clicks = 0;
if ( delegate.lastClickPos.distanceTo( releasePoint ) <= tracker.dblClickDistThreshold ) {
propagate = tracker.dblClickHandler(
{
eventSource: tracker,
pointerType: updateGPoint.type,
position: getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),
shift: event.shiftKey,
isTouchEvent: updateGPoint.type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
delegate.lastClickPos = null;
}
}
}
} else if ( pointsList.contacts === 2 ) {
if ( tracker.pinchHandler && updateGPoint.type === 'touch' ) {
// Reset for pinch
delegate.pinchGPoints = pointsList.asArray();
delegate.lastPinchDist = delegate.currentPinchDist = delegate.pinchGPoints[ 0 ].currentPos.distanceTo( delegate.pinchGPoints[ 1 ].currentPos );
delegate.lastPinchCenter = delegate.currentPinchCenter = getCenterPoint( delegate.pinchGPoints[ 0 ].currentPos, delegate.pinchGPoints[ 1 ].currentPos );
}
}
} else {
// Pointer was activated in another element but removed in our element
// Release (pressed in another element)
if ( tracker.releaseHandler ) {
propagate = tracker.releaseHandler(
{
eventSource: tracker,
pointerType: updateGPoint.type,
position: getPointRelativeToAbsolute( releasePoint, tracker.element ),
buttons: pointsList.buttons,
insideElementPressed: updateGPoint.insideElementPressed,
insideElementReleased: updateGPoint.insideElement,
isTouchEvent: updateGPoint.type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
}
}
}
return releaseCapture;
}
/**
* Call when pointer(s) change coordinates, button state, pressure, tilt, or contact geometry (e.g. width and height)
*
* @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 updatePointersMove( tracker, event, gPoints ) {
var delegate = THIS[ tracker.hash ],
pointsList = tracker.getActivePointersListByType( gPoints[ 0 ].type ),
i,
gPointCount = gPoints.length,
curGPoint,
updateGPoint,
gPointArray,
delta,
propagate;
if ( typeof event.buttons !== 'undefined' ) {
pointsList.buttons = event.buttons;
}
for ( i = 0; i < gPointCount; i++ ) {
curGPoint = gPoints[ i ];
updateGPoint = pointsList.getById( curGPoint.id );
if ( updateGPoint ) {
// Already tracking the pointer...update it
if ( curGPoint.hasOwnProperty( 'isPrimary' ) ) {
updateGPoint.isPrimary = curGPoint.isPrimary;
}
updateGPoint.lastPos = updateGPoint.currentPos;
updateGPoint.lastTime = updateGPoint.currentTime;
updateGPoint.currentPos = curGPoint.currentPos;
updateGPoint.currentTime = curGPoint.currentTime;
} else {
// Initialize for tracking and add to the tracking list (no pointerover or pointerdown event occurred before this)
curGPoint.captured = false;
curGPoint.insideElementPressed = false;
curGPoint.insideElement = true;
startTrackingPointer( pointsList, curGPoint );
}
}
// Stop (mouse only)
if ( tracker.stopHandler && gPoints[ 0 ].type === 'mouse' ) {
clearTimeout( tracker.stopTimeOut );
tracker.stopTimeOut = setTimeout( function() {
handlePointerStop( tracker, event, gPoints[ 0 ].type );
}, tracker.stopDelay );
}
if ( pointsList.contacts === 0 ) {
// Move (no contacts: hovering mouse or other hover-capable device)
if ( tracker.moveHandler ) {
propagate = tracker.moveHandler(
{
eventSource: tracker,
pointerType: gPoints[ 0 ].type,
position: getPointRelativeToAbsolute( gPoints[ 0 ].currentPos, tracker.element ),
buttons: pointsList.buttons,
isTouchEvent: gPoints[ 0 ].type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
} else if ( pointsList.contacts === 1 ) {
// Move (1 contact)
if ( tracker.moveHandler ) {
updateGPoint = pointsList.asArray()[ 0 ];
propagate = tracker.moveHandler(
{
eventSource: tracker,
pointerType: updateGPoint.type,
position: getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),
buttons: pointsList.buttons,
isTouchEvent: updateGPoint.type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
// Drag
if ( tracker.dragHandler ) {
updateGPoint = pointsList.asArray()[ 0 ];
delta = updateGPoint.currentPos.minus( updateGPoint.lastPos );
propagate = tracker.dragHandler(
{
eventSource: tracker,
pointerType: updateGPoint.type,
position: getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),
buttons: pointsList.buttons,
delta: delta,
speed: updateGPoint.speed,
direction: updateGPoint.direction,
shift: event.shiftKey,
isTouchEvent: updateGPoint.type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
} else if ( pointsList.contacts === 2 ) {
// Move (2 contacts, use center)
if ( tracker.moveHandler ) {
gPointArray = pointsList.asArray();
propagate = tracker.moveHandler(
{
eventSource: tracker,
pointerType: gPointArray[ 0 ].type,
position: getPointRelativeToAbsolute( getCenterPoint( gPointArray[ 0 ].currentPos, gPointArray[ 1 ].currentPos ), tracker.element ),
buttons: pointsList.buttons,
isTouchEvent: gPointArray[ 0 ].type === 'touch',
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
// Pinch
if ( tracker.pinchHandler && gPoints[ 0 ].type === 'touch' ) {
delta = delegate.pinchGPoints[ 0 ].currentPos.distanceTo( delegate.pinchGPoints[ 1 ].currentPos );
if ( delta != delegate.currentPinchDist ) {
delegate.lastPinchDist = delegate.currentPinchDist;
delegate.currentPinchDist = delta;
delegate.lastPinchCenter = delegate.currentPinchCenter;
delegate.currentPinchCenter = getCenterPoint( delegate.pinchGPoints[ 0 ].currentPos, delegate.pinchGPoints[ 1 ].currentPos );
propagate = tracker.pinchHandler(
{
eventSource: tracker,
pointerType: 'touch',
gesturePoints: delegate.pinchGPoints,
lastCenter: getPointRelativeToAbsolute( delegate.lastPinchCenter, tracker.element ),
center: getPointRelativeToAbsolute( delegate.currentPinchCenter, tracker.element ),
lastDistance: delegate.lastPinchDist,
distance: delegate.currentPinchDist,
shift: event.shiftKey,
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
if ( propagate === false ) {
$.cancelEvent( event );
}
}
}
}
}
/**
* @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 updatePointersCancel( tracker, event, gPoints ) {
updatePointersUp( tracker, event, gPoints, 0 );
updatePointersExit( tracker, event, gPoints );
}
/**
* @private
* @inner
*/
function handlePointerStop( tracker, originalMoveEvent, pointerType ) {
if ( tracker.stopHandler ) {
tracker.stopHandler( {
eventSource: tracker,
pointerType: pointerType,
position: getMouseRelative( originalMoveEvent, tracker.element ),
buttons: tracker.getActivePointersListByType( pointerType ).buttons,
isTouchEvent: pointerType === 'touch',
originalEvent: originalMoveEvent,
preventDefaultAction: false,
userData: tracker.userData
} );
}
}
// True if inside an iframe, otherwise false.
// @member {Boolean} isInIframe
// @private
// @inner
var isInIframe = (function() {
try {
return window.self !== window.top;
} catch (e) {
return true;
}
})();
// @function
// @private
// @inner
// @returns {Boolean} True if the target has access rights to events, otherwise false.
function canAccessEvents (target) {
try {
return target.addEventListener && target.removeEventListener;
} catch (e) {
return false;
}
}
}(OpenSeadragon));