UI Automation Support for the SplitButton Control Type

System_CAPS_ICON_note.jpg Note

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 SplitButton 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 control patterns.

The split button control enables the ability to perform an action on a control and expand the control to see a list of other possible actions that can be performed.

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

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

Control ViewContent View

  • Image (0 or 1)
  • Text (0 or 1)
  • Button (1 or 2)

    • Menu (0 or 1; appears as child of button that supports ExpandCollapse pattern)
    • MenuItem (1 to many)

- MenuItem (1 to many)

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

UI Automation PropertyValueNotes
AutomationIdPropertySee notes.The value of this property needs to be unique across all controls in an application.
BoundingRectanglePropertySee notes.The outermost rectangle that contains the whole control.
ClickablePointPropertySee 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.
IsKeyboardFocusablePropertySee notes.If the control can receive keyboard focus, it must support this property.
NameProperty"Back"The split button control's name is displayed on the button.
LabeledByPropertyNullSplit button controls do not have a static text label.
ControlTypePropertySplitButtonThis value is the same for all UI frameworks.
LocalizedControlTypeProperty"split button"Localized string corresponding to the SplitButton control type.
HelpTextPropertySee notes.The help text can indicate the result of activating the split button, which is typically the same type of information presented through a tooltip.
IsContentElementPropertyTrueThe split button control contains information for the end user.
IsControlElementPropertyTrueThe split button control is visible to the end user.

The following table lists the UI Automation control patterns required to be supported by split button controls. For more information about control patterns, see UI Automation Control Patterns Overview.

Control PatternSupportNotes
IInvokeProviderRequiredSplit buttons always have a default action associated with Invoke.
IExpandCollapseProviderRequiredSplit buttons always have the ability to expand a list of options.

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

UI Automation EventSupportNotes
BoundingRectangleProperty property-changed event.RequiredNone
IsOffscreenProperty property-changed event.RequiredNone
IsEnabledProperty property-changed event.RequiredNone
ExpandCollapseStateProperty property-changed event.RequiredNone

The following image illustrates a SplitButton control type in a data grid control.

Split button

The Control View and the Content View of the UI Automation tree that pertains to the data grid and split button controls is displayed below. The control patterns for each automation element are shown in parentheses.

UI Automation Tree - Control ViewUI Automation Tree - Content View
  • SplitButton "Name" (Invoke, ExpandCollapse)
  • Button "More options" (Invoke)

    • Menu
    • MenuItem
  • SplitButton "Name" (Invoke, ExpandCollapse)
  • Button "More options" (Invoke)

    • Menu
    • MenuItem

UI Automation Control Types Overview
UI Automation Overview