jQWidgets jqxChart saveAsPNG()用法及代码示例

jQWidgets 是一个 JavaScript 框架，用于为 PC 和移动设备制作基于 Web 的应用程序。它是一个非常强大和优化的框架，独立于平台，并且被广泛支持。 jqxChart 是一个轻量级且函数强大的图表小部件，100% 用 javascript 编写。它提供了许多高级函数并支持三种不同的渲染技术——SVG、HTML5 Canvas 和 VML。

saveAsPNG() 方法用于将图表的内容导出为 PNG 图像。它以fileName、exportServer 类型值作为参数，接受String 类型值并且不返回任何值。

用法:

var saveAsPNG = $('#jqxChart')
    .jqxChart('saveAsPNG', string);

链接文件：从链接下载 https://www.jqwidgets.com/download/。在 HTML 文件中，找到下载文件夹中的脚本文件：

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery-1.11.1.min.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxchart.core.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdraw.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdata.js”></script>

例：下面的例子说明了 jQWidgets 中的 jqxChart saveAsPNG() 方法：

HTML


<!DOCTYPE html>
<html lang="en">
  
<head>
    <link rel="stylesheet" 
          href="jqwidgets/styles/jqx.base.css" 
          type="text/css" />
    <script type="text/javascript" 
            src="scripts/jquery-1.11.1.min.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxcore.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxchart.core.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdraw.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxdata.js">
    </script>
</head>
  
<body>
    <center>
        <h1 style="color:green">
            GeeksforGeeks
        </h1>
  
        <h3>jQWidgets jqxChart saveAsPNG() method</h3>
  
        <button id='gfg'>Click Here</button>
  
        <div id='gfg1' 
            style="width:600px; height:400px">
        </div>
    </center>
  
    <script type="text/javascript">
        $(document).ready(function () {
            var json = [
                { Day:'Monday', A:3, B:1, C:2, D:1 },
                { Day:'Tuesday', A:3, B:1, C:2, D:1 },
                { Day:'Wednesday', A:3, B:1, C:2, D:1 },
                { Day:'Thursday', A:3, B:1, C:2, D:1 },
                { Day:'Friday', A:3, B:1, C:2, D:1 },
                { Day:'Saturday', A:3, B:1, C:2, D:1 },
                { Day:'Sunday', A:3, B:1, C:2, D:1 }
            ];
  
            var obj = {
                title:"Coding Score",
                description:"Coding Questions Solved Daily",
                source:json,
                toolTipMoveDuration:1000,
                categoryAxis:{
                    dataField:'Day',
                    showGridLines:true
                },
                seriesGroups:[{
                    type:'column',
                    columnsGapPercent:30,
                    seriesGapPercent:0,
                    valueAxis:{
                        minValue:0,
                        maxValue:10,
                        unitInterval:10,
                        description:'Questions Solved'
                    },
                    series:[
                        { dataField:'A', displayText:'A' },
                        { dataField:'B', displayText:'B' },
                        { dataField:'C', displayText:'C' },
                        { dataField:'D', displayText:'D' }
                    ]
                }]
            };
            $('#gfg1').jqxChart(obj);
  
            $('#gfg').click(function () {
                $('#gfg1').jqxChart(
                    'saveAsPNG', 'myChart.png',
'http://www.jqwidgets.com/export_server/export.php');
            });
        });
    </script>
</body>
  
</html>

输出：

参考：https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxchart/jquery-chart-api.htm?search=

相关用法

注：本文由纯净天空筛选整理自taran910大神的英文原创作品 jQWidgets jqxChart saveAsPNG() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。