Qt Reference Documentation

# css3_grad-radial.js Example File

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

     /****************************************************************************
     **
     ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** 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
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     **   * Redistributions of source code must retain the above copyright
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     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 ) );
     }