Group Kendo UI圖表類軸日期標籤四捨五入

Question

在我下面的Kendo UI圖表上，我一直想要顯示5個類別（X）軸標籤（已實現）。

我有2個問題（參照更多細節附加圖像），

1）這些標籤必須被適當地附近小時或30分鐘四捨五入

2）工具提示具有被格式化dd.MM.yy HH：tt

此圖表的數據是動態接受的。我不能使用類別軸類型作爲「日期」，因爲我想在圖上顯示所有數據點。

我的示例代碼如下可用，

 
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]; 
 
    
 
    $("#chart").kendoChart({ 
 
    dataSource: dataSource, 
 
    seriesDefaults: { 
 
     type: "line" 
 
    }, 
 
    series: [ 
 
     { 
 
     field: "data_3", 
 
     name: "Profit 2" 
 
     }, 
 
     { 
 
     field: "data_4", 
 
     name: "Profit 1" 
 
     }], 
 
    categoryAxis: { 
 
     field: "measurementDate", 
 
     type:"category", 
 
     labels: { 
 
     template: function(e){ 
 
      var val =new Date(e.value); 
 
      var label = kendo.toString(val, "dd.MM.yy HH:mm"); 
 
      return label.split(" ").join("\n"); 
 
     } 
 
     } 
 
    }, 
 
    valueAxis: { 
 
     axisCrossingValue: Number.MIN_SAFE_INTEGER 
 
    }, 
 
    tooltip: { 
 
     visible: true, 
 
     shared: true 
 
    }, 
 
    dataBound: function (e) { 
 
     var ds = this.dataSource.data(); 
 
     var maxDateCategories = 4; 
 
     var step = Math.round(ds.length/maxDateCategories); 
 
     // display only 'n'th categories on xAxis 
 
     this.options.categoryAxis.labels.step = step; 
 
    } 
 
    });

<!DOCTYPE html> 
 
<html> 
 
<head> 
 
    <meta charset="utf-8"> 
 
    <title>Untitled</title> 
 

 
    <link rel="stylesheet" href="https://kendo.cdn.telerik.com/2017.2.621/styles/kendo.common.min.css"> 
 
    <link rel="stylesheet" href="https://kendo.cdn.telerik.com/2017.2.621/styles/kendo.rtl.min.css"> 
 
    <link rel="stylesheet" href="https://kendo.cdn.telerik.com/2017.2.621/styles/kendo.default.min.css"> 
 
    <link rel="stylesheet" href="https://kendo.cdn.telerik.com/2017.2.621/styles/kendo.mobile.all.min.css"> 
 

 
    <script src="https://code.jquery.com/jquery-1.12.3.min.js"></script> 
 
    <script src="https://kendo.cdn.telerik.com/2017.2.621/js/angular.min.js"></script> 
 
    <script src="https://kendo.cdn.telerik.com/2017.2.621/js/jszip.min.js"></script> 
 
    <script src="https://kendo.cdn.telerik.com/2017.2.621/js/kendo.all.min.js"></script></head> 
 
<body> 
 
    <div id="chart"> </div> 
 
</body> 
 
</html>

Answer 1

工具提示您可以使用sharedTemplate格式化爲所需的類別：

sharedTemplate: '<div> #= kendo.toString(new Date(category), "dd.MM.yy HH:mm") # </div># for (var i = 0; i < points.length; i++) { # <div>#: points[i].series.name# : #: points[i].value #</div># } #' 

對於標籤模板，添加自己的舍入邏輯時間戳，例如：

labels: { 
    template: function(e){ 
     var val =new Date(e.value); 
     var mins = val.getMinutes(); 
     if (mins < 15) { 
     val.setMinutes(0); 
     } else if (mins < 45) { 
     val.setMinutes(30); 
     } else { 
     val.setHours(val.getHours() + 1); 
     val.setMinutes(0); 
     } 
     var label = kendo.toString(val, "dd.MM.yy HH:mm"); 
     return label.split(" ").join("\n"); 
    } 
    } 

DEMO