UI Automation Support for the Group Control Type


This documentation is intended for .NET Framework developers who want to use the managed UI Automation classes defined in the System.Windows.Automation namespace. For the latest information about UI Automation, see Windows Automation API: UI Automation.

This topic provides information about UI Automation support for the Group control type. In UI Automation, a control type is a set of conditions that a control must meet in order to use the ControlTypeProperty property. The conditions include specific guidelines for UI Automation tree structure, UI Automation property values, and UI Automation control patterns.

The group control represents a node within a hierarchy. The Group control type creates a separation in the UI Automation tree so items that are grouped together have a logical division within the UI Automation tree.

The following sections define the required UI Automation tree structure, properties, control patterns, and events for the Group control type. The UI Automation requirements apply to all group controls, whether Windows Presentation Foundation (WPF), Win32, or Windows Forms.

Required UI Automation Tree Structure

The following table depicts the control view and the content view of the UI Automation tree that pertains to group controls and describes what can be contained in each view. For more information on the UI Automation tree, see UI Automation Tree Overview.

Control View Content View

- 0 or many controls

- 0 or many controls

Typically group controls will have the UI Automation Support for the ListItem Control Type, UI Automation Support for the TreeItem Control Type, or UI Automation Support for the DataItem Control Type control types found underneath them in the subtree. Because 'Group' is a generic container, it is possible for any type of control to be under the Group control in the tree.

Required UI Automation Properties

The following table lists the UI Automation properties whose value or definition is especially relevant to group controls. For more information about UI Automation properties, see UI Automation Properties for Clients.

UI Automation Property Value Notes
AutomationIdProperty See notes. The value of this property needs to be unique across all controls in an application.
BoundingRectangleProperty See notes. The outermost rectangle that contains the whole control.
ClickablePointProperty See notes. Supported if there is a bounding rectangle. If not every point within the bounding rectangle is clickable, and you perform specialized hit testing, then override and provide a clickable point.
IsKeyboardFocusableProperty See notes. If the control can receive keyboard focus, it must support this property.
NameProperty See notes. The group control typically gets its name from the text that labels the control.
LabeledByProperty See notes. Group controls are typically self-labeling. In these cases return null here. If there is a static text label for the group then that must be returned as the value of the LabeledBy property.
ControlTypeProperty Group This value is the same for all UI frameworks.
LocalizedControlTypeProperty "group" Localized string corresponding to the Group control type.
IsContentElementProperty True The group control is always included in the content view of the UI Automation tree.
IsControlElementProperty True The calendar group is always included in the control view of the UI Automation tree.

Required UI Automation Control Patterns

The following table lists the UI Automation control patterns required to be supported for the Group control type. For more information about control patterns, see UI Automation Control Patterns Overview.

Control Pattern Support Notes
IExpandCollapseProvider Depends Group controls that can be used to show or hide information must support the Expand Collapse pattern.

Required UI Automation Events

The following table lists the UI Automation events required to be supported by all group controls. For more information about events, see UI Automation Events Overview.

UI Automation Event Support Notes
BoundingRectangleProperty property-changed event. Required None
IsOffscreenProperty property-changed event. Required None
IsEnabledProperty property-changed event. Required None
ExpandCollapseStateProperty property-changed event. Depends None
ToggleStateProperty property-changed event. Depends None
AutomationFocusChangedEvent Required None
StructureChangedEvent Required None

See Also

UI Automation Control Types Overview
UI Automation Overview