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?? Viewing: magictoolbox.utils.js

/**
* 2005-2017 Magic Toolbox
*
* NOTICE OF LICENSE
*
* This file is licenced under the Software License Agreement.
* With the purchase or the installation of the software in your application
* you accept the licence agreement.
*
* You must not modify, adapt or create derivative works of this source code
*
*  @author    Magic Toolbox <support@magictoolbox.com>
*  @copyright Copyright (c) 2017 Magic Toolbox <support@magictoolbox.com>. All rights reserved
*  @license   https://www.magictoolbox.com/license/
*/

function onMagicTap(e) {
    var mzObj = e.getTarget(),
        tap = {
            id: e.changedTouches[0].identifier,
            ts: e.timeStamp,
            x: e.changedTouches[0].clientX,
            y: e.changedTouches[0].clientY
        },
        tap0;
    while ( mzObj && 'a' !== mzObj.tagName.toLowerCase() ) {
        mzObj = mzObj.parentNode;
    }
    if (!mzObj) {
        return;
    }

    if ( 'touchstart' == e.type ) {
        mzObj.tap = tap;
    } else if ( 'touchend' == e.type ) {
        tap0 = mzObj.tap;
        mzObj.tap = null;
        if (!tap0) {
            return;
        };

        if (tap.id === tap0.id && tap.ts - tap0.ts <= 200
            && Math.sqrt(Math.pow(tap.x-tap0.x,2) + Math.pow(tap.y-tap0.y,2)) <= 15
        ) {
            e.stop();
            if (mzObj.onclick) {
                mzObj.onclick();
            };
            return;
        }
    }
}

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