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IExpandCollapseProvider Interface

Definition​

Namespace:Avalonia.Automation.Provider
Assembly:Avalonia.Controls
Package:Avalonia
Source:IExpandCollapseProvider.cs

Exposes methods and properties to support UI Automation client access to controls that visually expand to display content and collapse to hide content.

public interface IExpandCollapseProvider

Methods​

NameDescription
CollapseHides all nodes, controls, or content that are descendants of the control.
ExpandDisplays all child nodes, controls, or content of the control.

Collapse Method​

Hides all nodes, controls, or content that are descendants of the control.

public void Collapse()

Remarks​

  • WindowsIExpandCollapseProvider.Collapse
  • macOS Called by setting NSAccessibilityProtocol.setAccessibilityExpanded to false.

Expand Method​

Displays all child nodes, controls, or content of the control.

public void Expand()

Remarks​

  • WindowsIExpandCollapseProvider.Expand
  • macOS Called by setting NSAccessibilityProtocol.setAccessibilityExpanded to true, by calling NSAccessibilityProtocol.accessibilityPerformPress, or by calling NSAccessibilityProtocol.accessibilityPerformShowMenu when Avalonia.Automation.Provider.IExpandCollapseProvider.ShowsMenu is true.

Properties​

NameDescription
ExpandCollapseStateGets the state, expanded or collapsed, of the control.
ShowsMenuGets a value indicating whether expanding the element shows a menu of items to the user, such as drop-down list.

ExpandCollapseState Property​

Gets the state, expanded or collapsed, of the control.

public Avalonia.Automation.ExpandCollapseState ExpandCollapseState { get; set; }

Remarks​

  • WindowsIExpandCollapseProvider.ExpandCollapseState
  • macOSNSAccessibilityProtocol.isAccessibilityExpanded

ShowsMenu Property​

Gets a value indicating whether expanding the element shows a menu of items to the user, such as drop-down list.

public bool ShowsMenu { get; set; }

Remarks​

Used in OSX to allow accessibilityPerformShowMenu to open expandable controls such as a Avalonia.Controls.ComboBox; in macOS, a combo box drop-down is considered a menu.

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