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UI Automation Support for the Calendar Control Type

This topic provides information about Microsoft UI Automation support for the Calendar control type. A calendar control allows the user to easily determine the date and select other dates.

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

This topic contains the following sections.

Required UI Automation Tree Structure

The following table depicts the control view and the content view of the UI Automation tree that pertains to calendar 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
  • Calendar
    • DataGrid
      • Header (0 or 1)
        • HeaderItem (0 or 7, quantity depends on how many days are displayed in columns)
      • ListItem (quantity depends on how many days are displayed)
      • Button (0 or 2; for paging calendar view)
  • Calendar
    • ListItem (quantity depends on how many days are displayed)

Calendar controls can be represented in many different forms within the user interface. The only controls guaranteed to be in the control view of the UI Automation tree are the data grid, header, header item, and list item controls.

Required UI Automation Properties

The following table lists the UI Automation properties whose value or definition is especially relevant to the Calendar control type. 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 Calendar This value is the same for all UI frameworks.
UIA_IsContentElementPropertyId TRUE The calendar control is always included in the content view of the UI Automation tree.
UIA_IsControlElementPropertyId TRUE The calendar control is always included in the control view of the UI Automation tree.
UIA_IsKeyboardFocusablePropertyId See notes. If the control can receive keyboard focus, it must support this property.
UIA_LabeledByPropertyId See notes. The value of this property should be the label of the document control. Typically, the title of the document is used.
UIA_LocalizedControlTypePropertyId See notes. Localized string corresponding to the Calendar control type. The default value is "calendar" for en-US or English (United States).
UIA_NamePropertyId See notes. The calendar control typically gets its name from the current date.

Required UI Automation Control Patterns

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

Control Pattern/Pattern Property Support/Value Notes
IGridProvider Yes The calendar control always supports the Grid control pattern because the days within a month are items that can be navigated spatially.
IScrollProvider Depends Most calendar controls support flipping the view by page. The Scroll pattern is recommended in order to support paging navigation.
ISelectionProvider Depends Most of calendar controls retain a specific day, month, or year as a selection of the sub-element. Some calendars are multi-selectable and other only single-selectable.
ITableProvider Yes Because the calendar control always has a header within its subtree for the days of the week, the Table control pattern must be supported.
IValueProvider No The Value control pattern is not necessary for calendar controls because you cannot set the value directly on the control. If a specific date is associated with the control, the information should be provided by the Selection control pattern.

Required UI Automation Events

The following table lists the UI Automation events that calendar 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_LayoutInvalidatedEventId None
UIA_MultipleViewCurrentViewPropertyId property-changed event. If the control supports the CurrentView property of the MultipleView control pattern, it must support this event.
UIA_StructureChangedEventId None
UIA_ScrollHorizontallyScrollablePropertyId property-changed event. If the control supports the Scroll control pattern, it must support this event.
UIA_ScrollHorizontalScrollPercentPropertyId property-changed event. If the control supports the Scroll control pattern, it must support this event.
UIA_ScrollHorizontalViewSizePropertyId property-changed event. If the control supports the Scroll control pattern, it must support this event.
UIA_ScrollVerticalScrollPercentPropertyId property-changed event. If the control supports the Scroll control pattern, it must support this event.
UIA_ScrollVerticallyScrollablePropertyId property-changed event. If the control supports the Scroll control pattern, it must support this event.
UIA_ScrollVerticalViewSizePropertyId property-changed event. If the control supports the Scroll control pattern, it must support this event.
UIA_Selection_InvalidatedEventId None

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