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   [Expand]AppearanceObject Class
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   [Expand]ToolTipControllerEventArgsBase Class
   [Collapse]ToolTipControllerGetActiveObjectInfoEventArgs Class
     ToolTipControllerGetActiveObjectInfoEventArgs Members
     ToolTipControllerGetActiveObjectInfoEventArgs Constructor
    [Collapse]ToolTipControllerGetActiveObjectInfoEventArgs Properties
      ControlMousePosition Property
      Info Property
    ToolTipControllerGetActiveObjectInfoEventHandler Delegate
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    ToolTipIconSize Enumeration
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 End-User Documentation

ToolTipControllerGetActiveObjectInfoEventArgs.Info Property

Gets or sets an object which uniquely identifies the visual element at the current position.

Namespace:DevExpress.Utils
Assembly:DevExpress.Utils.v17.2.dll

Expanded Syntax

Property value

Type: ToolTipControlInfo
A ToolTipControlInfo object which identifies the visual element at the current position.

Expanded Remarks

The ToolTipController.GetActiveObjectInfo event is called repeatedly when the mouse cursor moves over a control. To display a hint for the control's specific element, check the current mouse position and if the mouse hovers over the required element assign a ToolTipControlInfo object containing tooltip information to the event's Info parameter. The ToolTipControlInfo.Text property must specify the hint to display. The ToolTipControlInfo.Object property must be set to a value that uniquely identifies the current element.

The value of the ToolTipControlInfo.Object property is used as an identifier. To display different tooltips for a control's elements, different ToolTipControlInfo objects with different values of the ToolTipControlInfo.Object properties must be used. If you assign the same ToolTipControlInfo object to the Info parameter as in the previous event call the tooltip will not be redisplayed even if a new tooltip text is specified. If you assign a new ToolTipControlInfo object but the object assigned to the ToolTipControlInfo.Object property is the same as in the previous event call, the tooltip will not be redisplayed either. If you assign a new ToolTipControlInfo object to the parameter and change the ToolTipControlInfo.Object property as compared to the previous event call, the previous hint will be hidden and the new hint will be displayed.

Expanded Example

The following example demonstrates a way of implementing custom tooltips for row indicator cells in the XtraGrid control. By default, the grid control does not support tooltips for row indicator cells. To provide tooltips, drop the ToolTipController component onto the grid's form, assign it to the grid control's EditorContainer.ToolTipController property and handle the ToolTipController.GetActiveObjectInfo event.

In our example, the tooltips will display the "Row N" text where N is the ordinal number of a row.

Expanded See Also

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