Vue PieChart - Hover

User Interaction

A series point's style changes when a user hovers the mouse pointer over it. The series.hoverStyle object specifies this style.

App.vue


<template> 
    <DxPieChart ... >
        <DxSeries>
            <DxHoverStyle>
                <!-- ... -->
            </DxHoverStyle>
        </DxSeries>
    </DxPieChart>
</template>
 
<script>
import DxPieChart, {
    DxSeries,
    DxHoverStyle
} from 'devextreme-vue/pie-chart';
 
export default {
    components: {
        DxPieChart,
        DxSeries,
        DxHoverStyle
    }
}
</script>

You can disable this feature by assigning "none" to the series.hoverMode property.

App.vue


<template> 
    <DxPieChart ... >
        <DxSeries hover-mode="none" />
    </DxPieChart>
</template>
 
<script>
import DxPieChart, {
    DxSeries
} from 'devextreme-vue/pie-chart';
 
export default {
    components: {
        DxPieChart,
        DxSeries
    }
}
</script>

API

You can switch a series point into the hover state and back again by calling its hover() and clearHover() method, respectively.

App.vue


<template> 
    <DxPieChart ... >
    </DxPieChart>
</template>
 
<script>
import DxPieChart from 'devextreme-vue/pie-chart';
 
export default {
    components: {
        DxPieChart
    },
 
    methods: {
        togglePointHoverState(point) {
            !point.isHovered() ? point.hover() : point.clearHover();
        }
    }
}
</script>

Events

When a user hovers the mouse pointer on a series point, the PieChart fires the pointHoverChanged event that you can handle with a function. Assign this function to the onPointHoverChanged property when you configure the UI component if it is going to remain unchanged during the UI component's lifetime. Call the point's isHovered() method to check whether the pointer entered or left a series point.

App.vue


<template> 
    <DxPieChart ...
        @point-hover-changed="onPointHoverChanged">
    </DxPieChart>
</template>
 
<script>
import DxPieChart from 'devextreme-vue/pie-chart';
 
export default {
    components: {
        DxPieChart
    },
 
    methods: {
        onPointHoverChanged({ target: point }) {
            if (point.isHovered()) {
                // Command to execute when the mouse pointer enters the point
            } else {
                // Command to execute when the mouse pointer leaves the point
            }
        }
    }
}
</script>

Subscribe to the pointHoverChanged event using the on(eventName, eventHandler) method if you are going to change the event handler at runtime or if you need to attach several handlers to it. This approach is more typical of jQuery.

JavaScript


var pointHoverChangedHandler1 = function (e) {
    var point = e.target;
    // The "pointHoverChanged" event's first handler
};
 
var pointHoverChangedHandler2 = function (e) {
    var point = e.target;
    // The "pointHoverChanged" event's second handler
};
 
$("#pieChartContainer").dxPieChart("instance")
    .on("pointHoverChanged", pointHoverChangedHandler1)
    .on("pointHoverChanged", pointHoverChangedHandler2);

Vue PieChart - Hover

User Interaction

API

See Also

Events

See Also