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jQWidgets jqxChart getItemsCount()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。它是一个非常强大且优化的、独立于平台且得到广泛支持的框架。jqx图表是一个轻量级且函数强大的图表小部件，100% 用 JavaScript 编写。它提供许多高级函数并支持三种不同的渲染技术 - SVG、HTML5 Canvas 和 VML。

getItemsCount() 方法用于返回特定系列中返回的项目的计数。它返回一个数字。

用法:

var gic = chartInstance.getItemsCount(groupIndex, seriesIndex);

参数：

  • groupIndex:它是组的指定索引。它是数字类型。
  • seriesIndex:它是该系列的指定索引。它是数字类型。

链接文件：下载jQWidgets从给定的链接。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>
<script type=”text/javascript” src=”jqwidgets/jqxchart.api.js”></script>

示例 1：下面的示例说明了 jQWidgets jqxChartgetItemsCount()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> 
  <script type="text/javascript"
            src="jqwidgets/jqxchart.api.js"> 
    </script> 
</head> 
  
<body> 
    <center> 
        <h1 style="color: green"> 
            GeeksforGeeks 
        </h1> 
  
        <h3>jQWidgets jqxChart getItemsCount() method</h3> 
  
        <div id='gfg1' style="width:400px; height: 200px" /> 
    </center> 
    <center> 
        <input type="button" 
               id="btn" 
               value="Click Here" 
               style="padding: 5px 14px; margin-top: 15px;"> 
        <br> 
        <div id="log"></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", 
                showToolTips: true, 
                source: json, 
                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); 
            $('#btn').click(function () { 
                var c = $("#gfg1").jqxChart('getItemsCount', 0, 1); 
                $('#log').text(c); 
            }); 
        }); 
    </script> 
</body> 
  
</html>

输出：

示例 2：下面是jqxChart的另一个例子getItemsCount()jQWidgets 中的方法。

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> 
  <script type="text/javascript"
            src="jqwidgets/jqxchart.api.js"> 
    </script> 
</head> 
  
<body> 
    <center> 
        <h1 style="color: green"> 
            GeeksforGeeks 
        </h1> 
  
        <h3>jQWidgets jqxChart getItemsCount() method</h3> 
  
        <div id='gfg1' style="width:400px; height: 200px" /> 
    </center> 
    <center> 
        <input type="button" 
               id="btn" 
               value="Click Here" 
               style="padding: 5px 14px; margin-top: 15px;"> 
        <br> 
        <div id="log"></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", 
                showToolTips: true, 
                source: json, 
                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); 
            $('#btn').click(function () { 
                var c = $("#gfg1").jqxChart('getItemsCount', 2, 1); 
                if (c === 0) { 
                    $('#log').text("Null!"); 
                } 
                else { 
                    $('#log').text("Not null!"); 
                } 
            }); 
        }); 
    </script> 
</body> 
  
</html>

输出：

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



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注：本文由纯净天空筛选整理自nidhi1352singh大神的英文原创作品 jQWidgets jqxChart getItemsCount() 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。