/** * A simple event recognizer which knows when you rotate. */Ext.define('Ext.event.gesture.Rotate', { extend: 'Ext.event.gesture.MultiTouch', priority: 700, handledEvents: ['rotatestart', 'rotate', 'rotateend', 'rotatecancel'], /** * @member Ext.dom.Element * @event rotatestart * Fired once when a rotation has started. * @param {Ext.event.Event} event The {@link Ext.event.Event} event encapsulating the DOM event. * @param {HTMLElement} node The target of the event. * @param {Object} options The options object passed to Ext.mixin.Observable.addListener. */ /** * @member Ext.dom.Element * @event rotate * Fires continuously when there is rotation (the touch must move for this to be fired). * When listening to this, ensure you know about the {@link Ext.event.Event#angle} and {@link Ext.event.Event#rotation} * properties in the `event` object. * @param {Ext.event.Event} event The {@link Ext.event.Event} event encapsulating the DOM event. * @param {HTMLElement} node The target of the event. * @param {Object} options The options object passed to Ext.mixin.Observable.addListener. */ /** * @member Ext.dom.Element * @event rotateend * Fires when a rotation event has ended. * @param {Ext.event.Event} event The {@link Ext.event.Event} event encapsulating the DOM event. * @param {HTMLElement} node The target of the event. * @param {Object} options The options object passed to Ext.mixin.Observable.addListener. */ /** * @property {Number} angle * The angle of the rotation. * * **This is only available when the event type is `rotate`** * @member Ext.event.Event */ /** * @property {Number} rotation * A amount of rotation, since the start of the event. * * **This is only available when the event type is `rotate`** * @member Ext.event.Event */ startAngle: 0, lastTouches: null, lastAngle: null, onTouchMove: function(e) { if (!this.isTracking) { return; } var touches = e.touches, lastAngle = this.lastAngle, firstPoint, secondPoint, angle, nextAngle, previousAngle, diff; firstPoint = touches[0].point; secondPoint = touches[1].point; angle = firstPoint.getAngleTo(secondPoint); if (lastAngle !== null) { diff = Math.abs(lastAngle - angle); nextAngle = angle + 360; previousAngle = angle - 360; if (Math.abs(nextAngle - lastAngle) < diff) { angle = nextAngle; } else if (Math.abs(previousAngle - lastAngle) < diff) { angle = previousAngle; } } this.lastAngle = angle; if (!this.isStarted) { this.isStarted = true; this.startAngle = angle; this.fire('rotatestart', e, { touches: touches, angle: angle, rotation: 0 }); } else { this.fire('rotate', e, { touches: touches, angle: angle, rotation: angle - this.startAngle }); } this.lastTouches = Ext.Array.clone(touches); }, fireEnd: function(e) { this.lastAngle = null; this.fire('rotateend', e); }, fireCancel: function(e) { this.lastAngle = null; this.fire('rotatecancel', e); }, reset: function() { var me = this; me.lastTouches = me.lastAngle = me.startAngle = null; this.callParent(); }}, function(Rotate) { var gestures = Ext.manifest.gestures; Rotate.instance = new Rotate(gestures && gestures.rotate);});