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Sencha Touch 2 MouseWheelDrag Recognizer
/**
* @author Jacky Nguyen
* @class Ux.event.recognizer.MouseWheelDrag
*
* Ext.Loader.setPath('Ux', '/path/to/your/app/ux');
*
* Ext.application({
* // ...
* eventPublishers: {
* touchGesture: {
* recognizers: {
* mousewheeldrag: {
* xclass: 'Ux.event.recognizer.MouseWheelDrag'
* }
* }
* }
* }
* // ...
* })
*/
Ext.define('Ux.event.recognizer.MouseWheelDrag', {
extend: 'Ext.event.recognizer.Touch',
requires: ['Ext.event.Dom'],
handledEvents: ['dragstart', 'drag', 'dragend'],
constructor: function() {
this.callParent(arguments);
this.onMouseWheel = Ext.Function.bind(this.onMouseWheel, this);
this.fireDragEnd = Ext.Function.bind(this.fireDragEnd, this);
document.addEventListener('mousewheel', this.onMouseWheel, true);
},
onMouseWheel: function(e) {
var helper = Ext.event.publisher.Dom.prototype,
target = helper.getElementTarget(e.target),
targets = helper.getBubblingTargets(target),
deltaX = e.hasOwnProperty('wheelDeltaX') ? e.wheelDeltaX : e.wheelDelta,
deltaY = e.hasOwnProperty('wheelDeltaY') ? e.wheelDeltaY : e.wheelDelta,
touches = [{
targets: targets
}],
lastPoint, time;
e = new Ext.event.Dom(e);
time = e.time;
this.lastEvent = e;
this.lastTouches = touches;
if (!this.startPoint) {
this.startTime = time;
this.startPoint = lastPoint = {
x: e.pageX,
y: e.pageY
};
this.previousPoint = lastPoint;
this.previousTime = time;
this.lastPoint = lastPoint;
this.lastTime = time;
this.fire('dragstart', e, touches, this.getInfo(e));
}
lastPoint = this.lastPoint;
this.previousTime = this.lastTime;
this.previousPoint = lastPoint;
this.lastPoint = {
x: lastPoint.x + deltaX,
y: lastPoint.y + deltaY
};
this.lastTime = time;
this.fire('drag', e, touches, this.getInfo(e));
clearTimeout(this.dragEndTimer);
this.dragEndTimer = setTimeout(this.fireDragEnd, 350);
},
fireDragEnd: function() {
var e = this.lastEvent;
this.fire('dragend', e, this.lastTouches, this.getInfo(e));
this.startTime = 0;
this.previousTime = 0;
this.lastTime = 0;
this.startPoint = null;
this.previousPoint = null;
this.lastPoint = null;
this.lastMoveEvent = null;
this.lastEvent = null;
this.lastTouches = null;
},
getInfo: function(e, touch) {
return Ext.event.recognizer.Drag.prototype.getInfo.apply(this, arguments);
}
});

It works nicely! Thank you for posting this.

melevine commented Jun 4, 2013

It looks like this no longer works with sencha touch 2.2. I'm seeing this error when using the mouse wheel:

Uncaught TypeError: Cannot call method 'apply' of undefined MouseWheelDrag.js:106
Ext.define.getInfo MouseWheelDrag.js:106
Ext.define.onMouseWheel MouseWheelDrag.js:82
(anonymous function)

ERROR!!!
Uncaught TypeError: Cannot call method 'apply' of undefined MouseWheelDrag.js:105
Ext.define.getInfo MouseWheelDrag.js:105
Ext.define.onMouseWheel MouseWheelDrag.js:81
(anonymous function)

https://gist.github.com/kirill-konshin/6197497 - proper getInfo function for 2.2.x...

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