+/*
+
+This file is part of Ext JS 4
+
+Copyright (c) 2011 Sencha Inc
+
+Contact: http://www.sencha.com/contact
+
+GNU General Public License Usage
+This file may be used under the terms of the GNU General Public License version 3.0 as published by the Free Software Foundation and appearing in the file LICENSE included in the packaging of this file. Please review the following information to ensure the GNU General Public License version 3.0 requirements will be met: http://www.gnu.org/copyleft/gpl.html.
+
+If you are unsure which license is appropriate for your use, please contact the sales department at http://www.sencha.com/contact.
+
+*/
/**
* @class Ext.EventObject
F11: 122,
/** Key constant @type Number */
F12: 123,
+ /**
+ * The mouse wheel delta scaling factor. This value depends on browser version and OS and
+ * attempts to produce a similar scrolling experience across all platforms and browsers.
+ *
+ * To change this value:
+ *
+ * Ext.EventObjectImpl.prototype.WHEEL_SCALE = 72;
+ *
+ * @type Number
+ * @markdown
+ */
+ WHEEL_SCALE: (function () {
+ var scale;
+
+ if (Ext.isGecko) {
+ // Firefox uses 3 on all platforms
+ scale = 3;
+ } else if (Ext.isMac) {
+ // Continuous scrolling devices have momentum and produce much more scroll than
+ // discrete devices on the same OS and browser. To make things exciting, Safari
+ // (and not Chrome) changed from small values to 120 (like IE).
+
+ if (Ext.isSafari && Ext.webKitVersion >= 532.0) {
+ // Safari changed the scrolling factor to match IE (for details see
+ // https://bugs.webkit.org/show_bug.cgi?id=24368). The WebKit version where this
+ // change was introduced was 532.0
+ // Detailed discussion:
+ // https://bugs.webkit.org/show_bug.cgi?id=29601
+ // http://trac.webkit.org/browser/trunk/WebKit/chromium/src/mac/WebInputEventFactory.mm#L1063
+ scale = 120;
+ } else {
+ // MS optical wheel mouse produces multiples of 12 which is close enough
+ // to help tame the speed of the continuous mice...
+ scale = 12;
+ }
+
+ // Momentum scrolling produces very fast scrolling, so increase the scale factor
+ // to help produce similar results cross platform. This could be even larger and
+ // it would help those mice, but other mice would become almost unusable as a
+ // result (since we cannot tell which device type is in use).
+ scale *= 3;
+ } else {
+ // IE, Opera and other Windows browsers use 120.
+ scale = 120;
+ }
+
+ return scale;
+ })(),
/**
* Simple click regex
},
/**
- * Normalizes mouse wheel delta across browsers
- * @return {Number} The delta
+ * Correctly scales a given wheel delta.
+ * @param {Number} delta The delta value.
*/
- getWheelDelta : function(){
- var event = this.browserEvent,
- delta = 0;
+ correctWheelDelta : function (delta) {
+ var scale = this.WHEEL_SCALE,
+ ret = Math.round(delta / scale + 0.5);
- if (event.wheelDelta) { /* IE/Opera. */
- delta = event.wheelDelta / 120;
- } else if (event.detail){ /* Mozilla case. */
- delta = -event.detail / 3;
+ if (!ret && delta) {
+ ret = (delta < 0) ? -1 : 1; // don't allow non-zero deltas to go to zero!
}
- return delta;
+
+ return ret;
+ },
+
+ /**
+ * Returns the mouse wheel deltas for this event.
+ * @return {Object} An object with "x" and "y" properties holding the mouse wheel deltas.
+ */
+ getWheelDeltas : function () {
+ var me = this,
+ event = me.browserEvent,
+ dx = 0, dy = 0; // the deltas
+
+ if (Ext.isDefined(event.wheelDeltaX)) { // WebKit has both dimensions
+ dx = event.wheelDeltaX;
+ dy = event.wheelDeltaY;
+ } else if (event.wheelDelta) { // old WebKit and IE
+ dy = event.wheelDelta;
+ } else if (event.detail) { // Gecko
+ dy = -event.detail; // gecko is backwards
+
+ // Gecko sometimes returns really big values if the user changes settings to
+ // scroll a whole page per scroll
+ if (dy > 100) {
+ dy = 3;
+ } else if (dy < -100) {
+ dy = -3;
+ }
+
+ // Firefox 3.1 adds an axis field to the event to indicate direction of
+ // scroll. See https://developer.mozilla.org/en/Gecko-Specific_DOM_Events
+ if (Ext.isDefined(event.axis) && event.axis === event.HORIZONTAL_AXIS) {
+ dx = dy;
+ dy = 0;
+ }
+ }
+
+ return {
+ x: me.correctWheelDelta(dx),
+ y: me.correctWheelDelta(dy)
+ };
+ },
+
+ /**
+ * Normalizes mouse wheel y-delta across browsers. To get x-delta information, use
+ * {@link #getWheelDeltas} instead.
+ * @return {Number} The mouse wheel y-delta
+ */
+ getWheelDelta : function(){
+ var deltas = this.getWheelDeltas();
+
+ return deltas.y;
},
/**
return target;
}
- }
+ };
} else if (document.createEventObject) { // else if (IE)
var crazyIEButtons = { 0: 1, 1: 4, 2: 2 };
});
+
git.ithinksw.org / extjs.git / blobdiff