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UI Automation Support for the Slider Control Type

Note 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 Slider 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 types.

The Slider control is a composite control with buttons that enable a user with a mouse to set a numerical range or select from a set of items.

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

This topic contains the following sections.

The following table depicts the Control View and the Content View of the UI Automation tree that pertains to slider 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

Slider

  • Button (2 or 4)

  • Thumb (only 1)

  • List Item (0 or more)

Slider

  • List Item (0 or more)

The following table lists the UI Automation properties whose value or definition is especially relevant to the Slider control type. 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 majority of slider controls must raise the NoClickablePointException because the entire bounding rectangle of the slider control is occupied by child controls.

IsKeyboardFocusableProperty

See notes.

If the control can receive keyboard focus, it must support this property.

NameProperty

See notes.

The name of the edit control is typically generated from a static text label. If there is not a static text label, a property value for Name must be assigned by the application developer. The Name property should never contain the textual contents of the edit control.

LabeledByProperty

See notes.

If there is a static text label associated with the control, then this property must expose a reference to that control. If the text control is a subcomponent of another control, it will not have a LabeledBy property set.

ControlTypeProperty

Slider

This value is the same for all UI frameworks.

LocalizedControlTypeProperty

"slider"

Localized string corresponding to the Edit Control Type.

IsContentElementProperty

True

The edit control is always included in the content view of the UI Automation tree.

IsControlElementProperty

True

The edit control is always included in the control view of the UI Automation tree.

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

Control Pattern

Support

Notes

ISelectionProvider

Depends

A slider should support the Selection control pattern if the content represents one value among a discrete set of options. When the Selection control pattern is supported, the corresponding selection must be exposed as one or more child list items of the slider.

IRangeValueProvider

Depends

A slider should support the RangeValue control pattern if the content can be set to a value within a numerical range.

IValueProvider

Depends

A slider should support the Value control pattern if the content represents one value among a discrete set of options.

The following table lists the UI Automation events required to be supported by all slider controls.

For more information on events, see UI Automation Events Overview.

UI Automation Event

Support

Notes

InvalidatedEvent

Depends

None

BoundingRectangleProperty property-changed event

Required

None

IsOffscreenProperty property-changed event

Required

None

IsEnabledProperty property-changed event

Required

None

ValueProperty property-changed event

Depends

None

AutomationFocusChangedEvent

Required

None

StructureChangedEvent

Required

None

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