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 End-User Documentation

ChartControl.ObjectHotTracked Event

Occurs before any chart element is hot-tracked at runtime.

Namespace:DevExpress.XtraCharts
Assembly:DevExpress.XtraCharts.v17.2.UI.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type HotTrackEventArgs containing data related to this event.

The following HotTrackEventArgs properties provide information specific to this event.
Property Description
AdditionalObject Provides access to an object related to the object being hit. The returned value depends on the DevExpress.XtraCharts.HotTrackEventArgs.Object type and hit point location.
Cancel Gets or sets whether the hot-tracking should be cancelled.
HitInfo Gets details on the chart elements located at the point where an end-user has clicked when hot-tracking or selecting a chart element at runtime.
Object Gets the chart element, for which the event was raised.

Expanded Remarks

If the RuntimeHitTesting property is set to true, end-users will be able to hot-track chart elements.

Handle the ObjectHotTracked event if you want to perform specific actions when an end-user hot-tracks a chart's elements, or if you want to disable the hot-tracking of particular elements. Note that the currently hot-tracked element of the chart can be accessed via the DevExpress.XtraCharts.HotTrackEventArgs.Object property.

Note

If you handle the ObjectHotTracked event, it will be raised and information on hit-testing will be collected, regardless of the current RuntimeHitTesting property value.

Expanded Example

This example demonstrates how to implement custom hot-tracking and selection of the chart's elements at runtime.

Note

To enable runtime hot-tracking and selection, the RuntimeSelection property should be set to true.

If you want to change the default hot-tracking and selection, you should handle the ObjectHotTracked and ObjectSelected events, implement your custom hot-tracking and selection approaches and set the Cancel property to true.

For example, the code below illustrates how to disable selection and hot-tracking of a chart's diagram.

Expanded See Also

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