Qt 4.8: css3_grad-radial.js Example File (webkit/webkit-guide/js/css3_grad-radial.js)

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# css3_grad-radial.js Example File

webkit/webkit-guide/js/css3_grad-radial.js

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the Qt WebKit module of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/
     window.onload = function() {
         var el = document.querySelector('#main');
         el.addEventListener('mousedown', function(event){

             var colors = [ 'beige', 'crimson', 'darkcyan', 'turquoise',
                 'darkgoldenrod', 'darkorange', 'fuchsia',
                 'greenyellow', 'lightblue', 'lightcoral',
                 'lightgreen', 'mediumorchid', 'pink', 'plum',
                 'skyblue', 'springgreen', 'tan', 'tomato',
                 'violet', 'yellow', 'teal'];

             var x = event.offsetX;
             var y = event.offsetY;

             var loc = document.querySelector('#localStyles');
             var style = '#main:active {' + 'background: -webkit-gradient(radial, ';
                 style += (x + ' ');
                 style += (y + ' ');
             style += ',5,';
                 style += ((x + 10) + ' ');
                 style += ((y + 10) + ' ');
             style += ', 48, ';
                 style += 'from(' + colors[r(5)] + '),';
                 style += 'color-stop(20%, ' + colors[r(5)] + '),';
                 style += 'color-stop(40%, ' + colors[r(5)] + '),';
                 style += 'color-stop(60%, ' + colors[r(5)] + '),';
                 style += 'color-stop(80%, ' + colors[r(5)] + '),';
                 style += 'to(#ffffff) );'
                 style += '}'
             loc.innerHTML = style;
         });
     }

     function r(i) {
         return Math.floor( (Math.random() * i ) );
     }