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 End-User Documentation

GridView.CustomDrawGroupRow Event

Enables you to paint group rows manually.

Namespace:DevExpress.XtraGrid.Views.Grid
Assembly:DevExpress.XtraGrid.v17.1.dll

Expanded Syntax

Expanded Event Data

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

The following RowObjectCustomDrawEventArgs properties provide information specific to this event.
Property Description
Appearance Gets the painted element's appearance settings.
Bounds Returns a value specifying limits for the drawing area.
Cache Gets an object which specifies the storage for the most often used pens, fonts and brushes.
Graphics Gets an object used to paint.
Handled Gets or sets a value specifying whether an event was handled and that the default element painting is therefore not required.
Info Gets an object containing information about the painted element.
Painter Gets the painter object that provides the default element painting mechanism.
RowHandle Gets the handle of the row whose corresponding element is being painted.

Expanded Remarks

The CustomDrawGroupRow event is raised each time a group row needs to be repainted. The row is identified by the RowObjectCustomDrawEventArgs.RowHandle parameter. The row's nesting level can be determined using the View's GetRowLevel method. This method's return value also identifies the grouping column corresponding to the group row.

The event's CustomDrawObjectEventArgs.Info parameter of the DevExpress.XtraGrid.Views.Grid.ViewInfo.GridGroupRowInfo type provides information specific to the group row display. For instance, the GroupText property accessible via the Info parameter specifies the group row's display text (cast this parameter to the GridGroupRowInfo type beforehand).

See the Custom Painting Basics and Custom Painting Scenarios topics for information on using custom draw events.

The GroupLevelStyle event allows you to customize group row indents.

Note

The control's events designed to change the appearance or rendering of control elements must not be used to update cell values or to modify the control's layout. Any inappropriate operation which causes a layout update, may break the normal control behavior.

Expanded Online Video

Expanded Example

The following example shows how to use HTML tags to format text in group rows via the CustomDrawGroupRow event. In the example, when data is grouped by the Quantity column, the column's group values are painted in different colors using the <color> tag.

New display text for group rows is supplied via the GroupText property of the event's e.Info parameter.

Expanded Example

The code shows how you can perform custom painting of group rows via the CustomDrawGroupRow event. In the example, a group row is filled with a gradient brush. The text for the group row is obtained via the GetGroupRowDisplayText method and is drawn with a shadowed effect.

Also the GroupLevelStyle event is handled in order to paint the group indent panel with a "LemonChiffon" color.

Expanded See Also

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