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Diffstat (limited to 'misc/openlayers/lib/OpenLayers/Handler/Pinch.js')
| -rw-r--r-- | misc/openlayers/lib/OpenLayers/Handler/Pinch.js | 239 |
1 files changed, 0 insertions, 239 deletions
diff --git a/misc/openlayers/lib/OpenLayers/Handler/Pinch.js b/misc/openlayers/lib/OpenLayers/Handler/Pinch.js deleted file mode 100644 index cd3d086..0000000 --- a/misc/openlayers/lib/OpenLayers/Handler/Pinch.js +++ /dev/null @@ -1,239 +0,0 @@ -/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for - * full list of contributors). Published under the 2-clause BSD license. - * See license.txt in the OpenLayers distribution or repository for the - * full text of the license. */ - -/** - * @requires OpenLayers/Handler.js - */ - -/** - * Class: OpenLayers.Handler.Pinch - * The pinch handler is used to deal with sequences of browser events related - * to pinch gestures. The handler is used by controls that want to know - * when a pinch sequence begins, when a pinch is happening, and when it has - * finished. - * - * Controls that use the pinch handler typically construct it with callbacks - * for 'start', 'move', and 'done'. Callbacks for these keys are - * called when the pinch begins, with each change, and when the pinch is - * done. - * - * Create a new pinch handler with the <OpenLayers.Handler.Pinch> constructor. - * - * Inherits from: - * - <OpenLayers.Handler> - */ -OpenLayers.Handler.Pinch = OpenLayers.Class(OpenLayers.Handler, { - - /** - * Property: started - * {Boolean} When a touchstart event is received, we want to record it, - * but not set 'pinching' until the touchmove get started after - * starting. - */ - started: false, - - /** - * Property: stopDown - * {Boolean} Stop propagation of touchstart events from getting to - * listeners on the same element. Default is false. - */ - stopDown: false, - - /** - * Property: pinching - * {Boolean} - */ - pinching: false, - - /** - * Property: last - * {Object} Object that store informations related to pinch last touch. - */ - last: null, - - /** - * Property: start - * {Object} Object that store informations related to pinch touchstart. - */ - start: null, - - /** - * Constructor: OpenLayers.Handler.Pinch - * Returns OpenLayers.Handler.Pinch - * - * Parameters: - * control - {<OpenLayers.Control>} The control that is making use of - * this handler. If a handler is being used without a control, the - * handlers setMap method must be overridden to deal properly with - * the map. - * callbacks - {Object} An object containing functions to be called when - * the pinch operation start, change, or is finished. The callbacks - * should expect to receive an object argument, which contains - * information about scale, distance, and position of touch points. - * options - {Object} - */ - - /** - * Method: touchstart - * Handle touchstart events - * - * Parameters: - * evt - {Event} - * - * Returns: - * {Boolean} Let the event propagate. - */ - touchstart: function(evt) { - var propagate = true; - this.pinching = false; - if (OpenLayers.Event.isMultiTouch(evt)) { - this.started = true; - this.last = this.start = { - distance: this.getDistance(evt.touches), - delta: 0, - scale: 1 - }; - this.callback("start", [evt, this.start]); - propagate = !this.stopDown; - } else if (this.started) { - // Some webkit versions send fake single-touch events during - // multitouch, which cause the drag handler to trigger - return false; - } else { - this.started = false; - this.start = null; - this.last = null; - } - // prevent document dragging - OpenLayers.Event.preventDefault(evt); - return propagate; - }, - - /** - * Method: touchmove - * Handle touchmove events - * - * Parameters: - * evt - {Event} - * - * Returns: - * {Boolean} Let the event propagate. - */ - touchmove: function(evt) { - if (this.started && OpenLayers.Event.isMultiTouch(evt)) { - this.pinching = true; - var current = this.getPinchData(evt); - this.callback("move", [evt, current]); - this.last = current; - // prevent document dragging - OpenLayers.Event.stop(evt); - } else if (this.started) { - // Some webkit versions send fake single-touch events during - // multitouch, which cause the drag handler to trigger - return false; - } - return true; - }, - - /** - * Method: touchend - * Handle touchend events - * - * Parameters: - * evt - {Event} - * - * Returns: - * {Boolean} Let the event propagate. - */ - touchend: function(evt) { - if (this.started && !OpenLayers.Event.isMultiTouch(evt)) { - this.started = false; - this.pinching = false; - this.callback("done", [evt, this.start, this.last]); - this.start = null; - this.last = null; - return false; - } - return true; - }, - - /** - * Method: activate - * Activate the handler. - * - * Returns: - * {Boolean} The handler was successfully activated. - */ - activate: function() { - var activated = false; - if (OpenLayers.Handler.prototype.activate.apply(this, arguments)) { - this.pinching = false; - activated = true; - } - return activated; - }, - - /** - * Method: deactivate - * Deactivate the handler. - * - * Returns: - * {Boolean} The handler was successfully deactivated. - */ - deactivate: function() { - var deactivated = false; - if (OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) { - this.started = false; - this.pinching = false; - this.start = null; - this.last = null; - deactivated = true; - } - return deactivated; - }, - - /** - * Method: getDistance - * Get the distance in pixels between two touches. - * - * Parameters: - * touches - {Array(Object)} - * - * Returns: - * {Number} The distance in pixels. - */ - getDistance: function(touches) { - var t0 = touches[0]; - var t1 = touches[1]; - return Math.sqrt( - Math.pow(t0.olClientX - t1.olClientX, 2) + - Math.pow(t0.olClientY - t1.olClientY, 2) - ); - }, - - - /** - * Method: getPinchData - * Get informations about the pinch event. - * - * Parameters: - * evt - {Event} - * - * Returns: - * {Object} Object that contains data about the current pinch. - */ - getPinchData: function(evt) { - var distance = this.getDistance(evt.touches); - var scale = distance / this.start.distance; - return { - distance: distance, - delta: this.last.distance - distance, - scale: scale - }; - }, - - CLASS_NAME: "OpenLayers.Handler.Pinch" -}); - |