Angular PieChart - Show and Hide a Tooltip

Each series point allows you to show or hide its tooltip programmatically by calling the showTooltip() or hideTooltip() method of the Point object. You can access this object with the API methods or in the handlers of the point events, such as pointClick, pointHoverChanged, etc. The latter is demonstrated in the following code.

App.vue


<template> 
    <DxPieChart ...
        @point-click="onPointClick"
        @point-hover-changed="onPointHoverChanged">
    </DxPieChart>
</template>
 
<script>
import DxPieChart from 'devextreme-vue/pie-chart';
 
export default {
    components: {
        DxPieChart
    },
    methods: {
        // Shows the tooltip only when a user clicks a series point
        onPointClick(e) {
            const point = e.target;
            point.showTooltip();
        },
        // Hides the tooltip once the user moves the pointer away from the series point
        onPointHoverChanged(e) {
            const point = e.target;
            if (!point.isHovered()) {
                point.hideTooltip();
            }
        }
    }
}
</script>

You can also hide the tooltip regardless of the point to which it belongs by calling the hideTooltip() method of the PieChart instance.

App.vue


<template> 
    <DxPieChart ...
        ref="pieChart">
    </DxPieChart>
</template>
 
<script>
import DxPieChart from 'devextreme-vue/pie-chart';
 
export default {
    components: {
        DxPieChart
    },
    methods: {
        hideTooltip () {
            this.$refs.pieChart.instance.hideTooltip();
        }
    }
}
</script>

Angular PieChart - Show and Hide a Tooltip

See Also