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RepositoryItemTrackBar.BeforeShowValueToolTip Event

Allows you to provide custom tooltips for the thumb(s).

Namespace: DevExpress.XtraEditors.Repository

Assembly: DevExpress.XtraEditors.v19.2.dll


public event TrackBarValueToolTipEventHandler BeforeShowValueToolTip

Event Data

The BeforeShowValueToolTip event's data class is DevExpress.XtraEditors.TrackBarValueToolTipEventArgs.


You can enable tooltips for the control's thumb(s) via the RepositoryItemTrackBar.ShowValueToolTip property. By default, tooltips only display the current value. To provide custom tooltips for the thumb (for example, to format the value in a specific manner), handle the BeforeShowValueToolTip event. While handling this event, the custom tooltip must be assigned to the event's ShowArgs.ToolTip parameter.


The following code shows how to implement custom tooltips for a TrackBarControl's thumb.

To enable tooltips, the RepositoryItemTrackBar.ShowValueToolTip property is set to true. Custom tooltips are implemented via the TrackBarControl.BeforeShowValueToolTip event. The result is shown below:


trackBarControl1.Properties.ShowValueToolTip = true;

private void trackBarControl1_BeforeShowValueToolTip(
object sender, DevExpress.XtraEditors.TrackBarValueToolTipEventArgs e) {
    e.ShowArgs.ToolTip = string.Format("Value = {0}", trackBarControl1.Value);
See Also