DxChart<T>.StickyHovering Property

Specifies whether the control highlights points even if the mouse pointer doesn’t point directly to them.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v23.2.dll

NuGet Package: DevExpress.Blazor

Declaration

[DefaultValue(true)]
[Parameter]
public bool StickyHovering { get; set; }

Property Value

Type	Default	Description
Boolean	true	true to highlight a point that’s within the same general area as the mouse pointer; false to highlight a point only when the mouse pointer is directly over it.

Remarks

When a user moves the mouse pointer within a chart pane, the control highlights the point that’s within the same general area.

To highlight a point only when a user points directly to it, set the StickyHovering property to false.

The following example disables “sticky hovering”:

<DxChart Data="@WeatherForecasts"
         CustomizeSeriesPoint="@PreparePointColor"
         StickyHovering="false"
         Width="100%">
    <DxChartTitle Text="Annual Weather in New York" />
    <DxChartLineSeries SummaryMethod="@(i => i.Average())"
                       Color="@Color.Gray"
                       ValueField="@((DetailedWeatherSummary i) => i.AverageTemperatureF)"
                       ArgumentField="@(i => new DateTime(2000, i.Date.Month, 1))"
                       Name="Temperature, °F"
                       Filter="@((DetailedWeatherSummary  i) => i.City == "NEW YORK")">
        <DxChartSeriesPoint Symbol="ChartPointSymbol.Polygon"
                            Color="@Color.Gray"
                            Size="25"/>
    </DxChartLineSeries>
    <DxChartLegend Visible="false" />
    <DxChartValueAxis>
        <DxChartAxisTitle Text="Temperature, °F" />
    </DxChartValueAxis>
    <DxChartArgumentAxis>
        <DxChartAxisLabel Format="ChartElementFormat.Month" />
    </DxChartArgumentAxis>
</DxChart>

@code {
    IEnumerable<DetailedWeatherSummary> WeatherForecasts;

    protected override async Task OnInitializedAsync() {
        WeatherForecasts = await WeatherSummaryDataProvider.GetDataAsync();
    }

    protected void PreparePointColor(ChartSeriesPointCustomizationSettings pointSettings) {
        double value = (double)pointSettings.Point.Value;
        if (value > 70)
            pointSettings.PointAppearance.Color = Color.Red;
        else if (value < 40)
            pointSettings.PointAppearance.Color = Color.Blue;
    }
}