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 End-User Documentation

GridView.CustomDrawGroupPanel Event

Enables you to paint the group panel manually.

Namespace:DevExpress.XtraGrid.Views.Grid
Assembly:DevExpress.XtraGrid.v17.2.dll

Expanded Syntax

Expanded Event Data

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

The following CustomDrawEventArgs 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 Provides methods to paint on drawing surfaces in GDI+ and DirectX modes. See DirectX hardware acceleration to learn more.
Graphics A GDI+ drawing surface. Use the CustomDrawEventArgs.Cache property instead if you enable the DirectX hardware acceleration.
Handled Gets or sets a value specifying whether an event was handled and that the default element painting is therefore not required.

Expanded Remarks

The CustomDrawGroupPanel event is raised each time the group panel needs to be repainted. Handle the event to paint the panel manually. See the Custom Painting Basics and Custom Painting Scenarios topics for information on using custom draw events.

Note

After the CustomDrawGroupPanel event handler has been executed, the string specified by the GroupPanelText property is painted within the group panel, regardless of the event's CustomDrawEventArgs.Handled parameter. To prevent this, set the GroupPanelText property to an empty string.

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 Example

In this example we draw the group panel in a specific manner by handling the CustomDrawGroupPanel event. First, the panel is filled with a gradient brush. Then a custom image is drawn at right edge of the panel.

Expanded See Also

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