UI Automation Support for the Text Control Type
This topic provides information about Microsoft UI Automation support for the Text control type.
A text control is a basic user interface item that represents a piece of text on the screen.
The following sections define the required UI Automation tree structure, properties, control patterns, and events for the Text control type. The UI Automation requirements apply to the Text control type, whether Microsoft Windows Presentation Foundation (WPF), Microsoft Win32, or Windows Forms.
This topic contains the following sections.
- Required UI Automation Tree Structure
- Required UI Automation Properties
- Required UI Automation Control Patterns
- Required UI Automation Events
- Related Topics
Required UI Automation Tree Structure
The following table depicts the control view and the content view of the UI Automation tree that pertains to text controls and describes what can be contained in each view. For more information about the UI Automation tree, see UI Automation Tree Overview.
| Control View | Content View |
|---|---|
|
|
A text control can be used alone as a label or as static text on a form. It can also be contained within the structure of one of the following items:
- ListItem
- TreeItem
- DataItem
Text controls might not appear in the content view of the UI Automation tree because text is often displayed through the Name property of another control. For example, the text used to label a combo box control is exposed through the control's Name property. Because the combo box control is in the content view of the UI Automation tree, the text control need not be there. Text controls always have zero children in the content view.
Required UI Automation Properties
The following table lists the UI Automation properties whose value or definition is especially relevant to the text controls. For more information about UI Automation properties, see UI Automation Properties for Clients.
| UI Automation Property | Value | Notes |
|---|---|---|
| UIA_AutomationIdPropertyId | See notes. | The value of this property needs to be unique across all controls in an application. |
| UIA_BoundingRectanglePropertyId | See notes. | The outermost rectangle that contains the whole control. |
| UIA_ClickablePointPropertyId | 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, override and provide a clickable point. |
| UIA_ControlTypePropertyId | Text | This value is the same for all UI frameworks. |
| UIA_IsContentElementPropertyId | Depends | The text control is content if it contains information not exposed in another control's Name property. |
| UIA_IsControlElementPropertyId | TRUE | The text control must always be a control. |
| UIA_IsKeyboardFocusablePropertyId | See notes. | If the control can receive keyboard focus, it must support this property. |
| UIA_LabeledByPropertyId | NULL | Text controls do not have a static text label. |
| UIA_LocalizedControlTypePropertyId | See notes. | Localized string corresponding to the Text control type. The default value is "text" for en-US or English (United States). |
| UIA_NamePropertyId | See notes. | The name of a text control is always the text that it displays. |
Required UI Automation Control Patterns
The following table lists the UI Automation control patterns required to be supported by text controls. For more information on control patterns, see UI Automation Control Patterns Overview.
| Control Pattern/Pattern Property | Support/Value | Notes |
|---|---|---|
| IGridItemProvider | Depends | If the text control is contained within a table control, the GridItem control pattern must be supported. |
| ITableItemProvider | Depends | If the text control is contained within a table control, the TableItem control pattern must be supported. |
| ITextProvider | Depends | Text should support the Text control pattern for better accessibility; however, it is not required. The Text control pattern is useful when the text has rich style and attributes (for example, color, bold, and italics). |
| IValueProvider | Never | A text control never supports the Value control pattern. If the text is editable, it is the Edit control type. |
Required UI Automation Events
The following table lists the UI Automation events that text controls are required to support. For more information on events, see UI Automation Events Overview.
| UI Automation Event | Notes |
|---|---|
| UIA_AutomationFocusChangedEventId | None |
| UIA_BoundingRectanglePropertyId property-changed event. | None |
| UIA_IsEnabledPropertyId property-changed event. | If the control supports the IsEnabled property, it must support this event. |
| UIA_IsOffscreenPropertyId property-changed event. | If the control supports the IsOffscreen property, it must support this event. |
| UIA_NamePropertyId property-changed event. | None |
| UIA_StructureChangedEventId | None |
| UIA_Text_TextChangedEventId | If the control supports the Text control pattern, it must support this event. |