jQWidgets jqxTreeMap legendScaleCallback属性用法及代码示例

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、优化、独立于平台且得到广泛支持的框架。这jqxTreeMap用于显示嵌套矩形的分层数据集。这里，树的每个分支都表示为一个矩形，然后用代表子分支的较小矩形进行平铺。这里，叶节点的矩形的面积与数据上的指定维度成比例。

legendScale回调 属性用于设置或返回回调函数，以便设置显示的 jqxTreeMap 图例中显示的值的样式。它的类型是Object，默认值为“null”。

用法:

设置legendScale回调属性：

$("#jqxTreeMap").jqxTreeMap({ legendScaleCallback: null });

返回legendScale回调属性：

var legendScaleCallback = 
    $('#jqxTreeMap').jqxTreeMap('legendScaleCallback');

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.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxtooltip.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxtreemap.js”></script>

示例 1：下面的示例说明了 jQWidgets jqxTreeMaplegendScale回调属性。

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.js"> 
    </script> 
    <script type="text/javascript"
            src="jqwidgets/jqxcore.js"> 
    </script> 
    <script type="text/javascript"
            src="jqwidgets/jqxtooltip.js"> 
    </script> 
    <script type="text/javascript"
            src="jqwidgets/jqxtreemap.js"> 
    </script>     
    <script type="text/javascript"
            src="scripts/jqx-all.js"> 
    </script> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;"> 
            GeeksforGeeks 
        </h1> 
        <h3> 
            jQWidgets jqxTreeMap legendScaleCallback  property 
        </h3> 
        <div id="Tree_Map"></div> 
        <script type="text/javascript"> 
  
            $(document).ready(function () { 
                var d = [{ 
                    label: 'GeeksforGeeks', 
                    id: "1", 
                    value: 70, 
                    color: '#ff0300' 
                }, { 
                    label: 'is a', 
                    id: "2", 
                    value: 10, 
                    parent: 'GeeksforGeeks', 
                    color: '#ff5400' 
                }, { 
                    label: 'Computer Science', 
                    id: "3", 
                    value: 30, 
                    parent: 'GeeksforGeeks', 
                    color: '#008000' 
                }, { 
                    label: 'Portal.', 
                    id: "4", 
                    value: 15, 
                    parent: 'GeeksforGeeks', 
                    color: '#7fbf00' 
                } 
                ]; 
                var src = 
                { 
                    datatype: "json", 
                    datafields: [ 
                        { 
                            name: 'id' 
                        }, 
                        { 
                            name: 'parent' 
                        }, 
                        { 
                            name: 'label' 
                        }, 
                        { 
                            name: 'value' 
                        } 
                    ], 
                    id: 'id', 
                    localdata: d 
                }; 
                var da = new $.jqx.dataAdapter(src); 
                $('#Tree_Map').jqxTreeMap({ 
                    width: 390, 
                    height: 200, 
                    source: d, 
                    colorMode: 'rangeColors', 
                    legendScaleCallback: function (lsc) { 
                        lsc = lsc.toFixed(2); 
                        return lsc; 
                    }, 
                }); 
            }); 
        </script> 
    </center> 
</body> 
</html>

输出：

示例 2：下面是jQWidgets jqxTreeMap的另一个例子legendScale回调 属性。

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.js"> 
    </script> 
    <script type="text/javascript"
            src="jqwidgets/jqxcore.js"> 
    </script> 
    <script type="text/javascript"
            src="jqwidgets/jqxtooltip.js"> 
    </script> 
    <script type="text/javascript"
            src="jqwidgets/jqxtreemap.js"> 
    </script> 
      
    <script type="text/javascript"
            src="scripts/jqx-all.js"> 
    </script> 
</head> 
  
<body> 
    <center> 
        <h1 style="color: green;"> 
            GeeksforGeeks 
        </h1> 
        <h3> 
            jQWidgets jqxTreeMap legendScaleCallback property 
        </h3> 
        <div id="Tree_Map"></div> 
        <input type="button" style="margin: 28px;"
               id="btn" value="click here" /> 
        <div id="log"></div> 
        <script type="text/javascript"> 
  
            $(document).ready(function () { 
                var d = [{ 
                    label: 'GeeksforGeeks', 
                    id: "1", 
                    value: 70, 
                    color: '#ff0300' 
                }, { 
                    label: 'is a', 
                    id: "2", 
                    value: 10, 
                    parent: 'GeeksforGeeks', 
                    color: '#ff5400' 
                }, { 
                    label: 'Computer Science', 
                    id: "3", 
                    value: 30, 
                    parent: 'GeeksforGeeks', 
                    color: '#008000' 
                }, { 
                    label: 'Portal.', 
                    id: "4", 
                    value: 15, 
                    parent: 'GeeksforGeeks', 
                    color: '#7fbf00' 
                } 
                ]; 
                var src = 
                { 
                    datatype: "json", 
                    datafields: [ 
                        { 
                            name: 'id' 
                        }, 
                        { 
                            name: 'parent' 
                        }, 
                        { 
                            name: 'label' 
                        }, 
                        { 
                            name: 'value' 
                        } 
                    ], 
                    id: 'id', 
                    localdata: d 
                }; 
                var da = new $.jqx.dataAdapter(src); 
                $('#Tree_Map').jqxTreeMap({ 
                    width: 390, 
                    height: 200, 
                    source: d, 
                    colorMode: 'rangeColors', 
                    legendScaleCallback: null 
                }); 
                $("#btn").jqxButton({ 
                    width: 300 
                }); 
                $("#btn").click( 
                    function () { 
                        var lsc = $('#Tree_Map') 
                            .jqxTreeMap('legendScaleCallback'); 
                        $("#log").text(lsc); 
                    }); 
            }); 
        </script> 
    </center> 
</body> 
  
</html>

输出：

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

相关用法

注：本文由纯净天空筛选整理自nidhi1352singh大神的英文原创作品 jQWidgets jqxTreeMap legendScaleCallback Property。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。