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jQWidgets jqxTreeMap legendScaleCallback屬性用法及代碼示例


jQWidgets是一個 JavaScript 框架，用於為 PC 和移動設備製作基於 Web 的應用程序。它是一個非常強大、優化、獨立於平台且得到廣泛支持的框架。這jqxTreeMap用於顯示嵌套矩形的分層數據集。這裏，樹的每個分支都表示為一個矩形，然後用代表子分支的較小矩形進行平鋪。這裏，葉節點的矩形的麵積與數據上的指定維度成比例。

legendScale回調 屬性用於設置或返回回調函數，以便設置顯示的 jqxTreeMap 圖例中顯示的值的樣式。它的類型是Object，默認值為“null”。

用法:

  • 設置legendScale回調屬性：
$("#jqxTreeMap").jqxTreeMap({ legendScaleCallback: null });
  • 返回legendScale回調屬性：
var legendScaleCallback = 
    $('#jqxTreeMap').jqxTreeMap('legendScaleCallback');

鏈接文件：下載jQWidgets從給定的鏈接。在 HTML 文件中，找到下載文件夾中的腳本文件。

<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：下麵的示例說明了 jQWidgets jqxTreeMaplegendScale回調屬性。

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>

輸出：

示例 2：下麵是jQWidgets jqxTreeMap的另一個例子legendScale回調 屬性。

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>

輸出：

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



相關用法


注：本文由純淨天空篩選整理自nidhi1352singh大神的英文原創作品 jQWidgets jqxTreeMap legendScaleCallback Property。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。