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Data Label in Vue Accumulation Chart component

23 Jun 2022 / 11 minutes to read

Data label can be added to a chart series by enabling the visible option in the dataLabel property.

Source
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app.vue
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<template>
    <div id="app">
         <ejs-accumulationchart id="container" enableSmartLabels='enableSmartLabels'>
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }
                ],
                datalabel: { visible: true, name:'text' },
                enableSmartLabels: true
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  }
};
</script>
<style>
 #container {
     height: 350px;
 }
</style>

Note: To use the data label feature, inject the DataLabel into the provide.

Positioning

Accumulation chart provides support for placing the data label either inside or outside the chart.

Source
Preview
app.vue
Copied to clipboard
<template>
    <div id="app">
         <ejs-accumulationchart id="container">
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }
                ],
                datalabel: { visible: true, position:'Outside', name:'text' },
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  }
};
</script>
<style>
 #container {
     height: 350px;
 }
</style>

DataLabel rotation

Using angle property, you can rotate the data label by its given angle.

Source
Preview
app.vue
Copied to clipboard
<template>
    <div id="app">
         <ejs-accumulationchart id="container">
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }
                ],
                datalabel: { visible: true, name:'text', angle: 90, enableRotation: true },
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  }
};
</script>
<style>
 #container {
     height: 350px;
 }
</style>

Smart labels

Datalabels will be arranged smartly without overlapping with each other. You can enable or disable this feature using the enableSmartLabels property.

Source
Preview
app.vue
Copied to clipboard
<template>
    <div id="app">
         <ejs-accumulationchart id="container" enableSmartLabels='enableSmartLabels'>
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }],
                datalabel: { visible: true, name: 'text', position: 'Outside', name:'text' },
                enableSmartLabels: true
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  }
};
</script>
<style>
 #container {
     height: 350px;
 }
</style>

Datalabel template

Label content can be formatted by using the template option. Inside the template, you can add the placeholder text ${point.x} and ${point.y} to display corresponding data points x & y value. Using template property, you can set data label template in chart.

Source
Preview
app.vue
Copied to clipboard
<template>
    <div id="app">
         <ejs-accumulationchart id="container" enableSmartLabels='enableSmartLabels'>
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }],
                datalabel: { visible: true, name: 'text', position: 'Inside',
                template:  "<div id='templateWrap' style='background-color:#bd18f9;border-radius: 3px; float: right;padding: 2px;line-height: 20px;text-align: center;'>"+ "<img src='sun_annotation.png' />" + "<div style='color:white; font-family:Roboto; font-style: medium; fontp-size:14px;float: right;padding: 2px;line-height: 20px;text-align: center;padding-right:6px'><span>${point.y}</span></div></div>" },
                enableSmartLabels: true
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  }
};
</script>
<style>
 #container {
     height: 350px;
 }
</style>

Connector Line

Connector line will be visible when the data label is placed outside the chart. The connector line can be customized using the type, color, width, length and dashArray properties

Source
Preview
app.vue
Copied to clipboard
<template>
    <div id="app">
         <ejs-accumulationchart id="container">
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }],
                datalabel: { visible: true, name: 'text', position: 'Outside',
                connectorStyle:{
                    //Length of the connector line in pixels
                    length: '50px',
                    //Width of the connector line in pixels
                    width: 2,
                    //dashArray of the connector line
                    dashArray: '5,3',
                    //Color of the connector line
                    color: '#f4429e',
                    //Specifies the type of the connector line either Line or Curve
                    type: 'Curve'
                } }
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  }
};
</script>
<style>
 #container {
     height: 350px;
 }
</style>

Text Mapping

The fill color and the text in the data source can be mapped to the chart using pointColorMapping in series and name in datalabel respectively.

Source
Preview
app.vue
Copied to clipboard
<template>
    <div id="app">
         <ejs-accumulationchart id="container">
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }],
                datalabel: { visible: true, name: 'text' }
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  }
};
</script>
<style>
  #container {
     height: 350px;
 }
</style>

Customization

Individual text can be customized using the textRender event.

Source
Preview
app.vue
Copied to clipboard
<template>
    <div id="app">
         <ejs-accumulationchart id="container" :textRender='onTextRender'>
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }],
                datalabel: { visible: true, name: 'text', position: 'Outside' }
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  },
   methods: {
   onTextRender: function (args) {
        if (args.text.indexOf('Mar') > -1) {
            args.color = 'red';
            args.border.width = 1;
        }
    }
   }
};
</script>
<style>
 #container {
     height: 350px;
 }
</style>

Show percentages in data labels of pie chart

You can show the percentages in data labels of pie chart using textRender event and template option.

Using textRender event

You can customize the data label of pie chart using textRender event as follows to show percentage.

Source
Preview
app.vue
Copied to clipboard
<template>
    <div id="app">
         <ejs-accumulationchart id="container" enableSmartLabels='enableSmartLabels' :textRender='onTextRender'>
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }
                ],
                datalabel: { visible: true },
                enableSmartLabels: true
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  },
  methods: {
   onTextRender: function (args) {
      args.text = args.point.percentage + "%";
    }
   }
};
</script>
<style>
 #container {
     height: 350px;
 }
</style>

Using template

You can display the percentage values in data label of pie chart using template option.

Source
Preview
app.vue
Copied to clipboard
<template>
    <div id="app">
         <ejs-accumulationchart id="container" enableSmartLabels='enableSmartLabels'>
            <e-accumulation-series-collection>
                <e-accumulation-series :dataSource='seriesData' xName='x' yName='y' :dataLabel='datalabel'> </e-accumulation-series>
            </e-accumulation-series-collection>
        </ejs-accumulationchart>
    </div>
</template>
<script>
import Vue from "vue";
import { AccumulationChartPlugin, PieSeries, AccumulationDataLabel } from "@syncfusion/ej2-vue-charts";

Vue.use(AccumulationChartPlugin);

export default {
  data() {
    return {
      seriesData: [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: 7, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: 25, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }
                ],
                datalabel: { visible: true, template: "<div id='dataLabelTemplate'>${point.percentage}%</div>" },
                enableSmartLabels: true
           };
  },
  provide: {
     accumulationchart: [PieSeries, AccumulationDataLabel]
  }
};
</script>
<style>
 #container {
     height: 350px;
 }
</style>
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