/// <summary>
/// Registers a property changed event with the given property.
/// </summary>
public IDisposable SubscribeToPropertyChangedEvent(TreeScope treeScope, AutomationProperty property, Action <UiElement, AutomationPropertyChangedEventArgs> action)
{
return(this.AutomationElement.SubscribeToPropertyChangedEvent(
treeScope,
property,
(sender, args) => action(FromAutomationElement((AutomationElement)sender), args)));
}
/// <summary>
/// Subscribe to value changes
/// </summary>
/// <param name="element">The <see cref="AutomationElement"/></param>
/// <param name="treeScope">The <see cref="TreeScope"/></param>
/// <param name="property">The <see cref="AutomationProperty"/> to subscribe to changes for.</param>
/// <param name="handler"> The <see cref="AutomationPropertyChangedEventHandler"/>. </param>
/// <returns>A <see cref="IDisposable"/> that unsubcribes on dispose.</returns>
public static IDisposable ToPropertyChangedEvent(AutomationElement element, TreeScope treeScope, AutomationProperty property, AutomationPropertyChangedEventHandler handler)
{
Automation.AddAutomationPropertyChangedEventHandler(element, treeScope, handler, property);
return(Disposable.Create(() => Automation.RemoveAutomationPropertyChangedEventHandler(element, handler)));
}
/// <summary>
/// Method to check if the element supports the given property via UIA method.
/// Does not work with cached elements and might be unreliable.
/// </summary>
public bool IsPropertySupportedDirect(AutomationProperty property)
{
return(this.GetSupportedPropertiesDirect().Contains(property));
}
public static IDisposable SubscribeToPropertyChangedEvent(this AutomationElement element, TreeScope treeScope, AutomationProperty property, AutomationPropertyChangedEventHandler handler)
{
return(Subscribe.ToPropertyChangedEvent(
element,
treeScope,
property,
handler));
}
protected AutomationProperty <T> GetOrCreate <T>(ref AutomationProperty <T> val, PropertyId propertyId)
{
return(val ?? (val = new AutomationProperty <T>(propertyId, this.BasicAutomationElement)));
}