UI Automation Support for the TabItem Control Type
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 TabItem 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.
A tab item control is used as the control within a tab control that selects a specific page to be shown in a window.
The following sections define the required UI Automation tree structure, properties, control patterns, and events for the TabItem control type. The UI Automation requirements apply to all tab item 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 tab item 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 |
|---|---|
TabItem
|
TabItem
|
Required UI Automation Properties
The following table lists the UI Automation properties whose value or definition is especially relevant to tab item controls. For more information on 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. | The tab item control must have a clickable point that causes the item to become selected. |
| IsKeyboardFocusableProperty | See notes. | If the control can receive keyboard focus, it must support this property. |
| NameProperty | See notes. | The tab item control is self-labeled. |
| LabeledByProperty | Null |
The tab item control does not have a static text label. |
| ControlTypeProperty | TabItem | This value is the same for all UI frameworks. |
| LocalizedControlTypeProperty | "tab item" | Localized string corresponding to this control type. |
| IsContentElementProperty | True | The tab item control must always be content. |
| IsControlElementProperty | True | The tab item control must always be a control. |
Required UI Automation Control Patterns
The following table lists the UI Automation control patterns required to be supported by tab item controls. For more information on control patterns, see UI Automation Control Patterns Overview.
| Control Pattern | Support | Notes |
|---|---|---|
| ISelectionItemProvider | Yes | The tab item control must support SelectionItemPattern. |
| IInvokeProvider | No | The tab item control never supports InvokePattern. |
Required UI Automation Events
The following table lists the UI Automation events required to be supported by all tab item 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 |
| AutomationFocusChangedEvent | Required | None |
| ElementSelectedEvent | Required | None |
| ElementRemovedFromSelectionEvent | Required | None |
| StructureChangedEvent | Required | None |