CODEWITHSUNDEEP
windowswinapiaccessibilityui-automationuia
TN.
TN.

Reputation: 19850

Why does the root parameter exist when I could just call `FindAllWithOptions` on the other element if I wanted to start the search somewhere else?

The documentation for IUIAutomationElement7::FindAllWithOptions states:

[in, optional] root

A pointer to the element with which to begin the search.

How is the root parameter different from this? What are the use cases for the root parameter? Does it allow range queries (e.g. return ancestors from this to root)?

Upvotes: 0

Views: 77

Answers (1)

Jeaninez - MSFT
Jeaninez - MSFT

Reputation: 4040

You could change the starting point on the search somewhere by calling FindAllWithOptions on the other element, but the root parameter allows you to specify the starting point directly in the function call. You could dynamically adjust the search context by specifying different root elements.

By using the root parameter, you can simplify your search and avoid redundant code. When dealing with some complex or nested structures, the performance overhead of whole-tree traversal will be avoided.

By using the root parameter, you could avoid repeatedly looking for the root element. Otherwise, every time you call FindAllWithOptions, you will need to find the root element repeatedly by FindFirst or other methods.

If you don't use the root parameter, you need to add additional criteria to ensure that the search scope is correct each time when you search.

If you don't use the root parameter, you may need to search for elements globally, resulting in performance degradation.

If you use the root parameter, you can abstract the search logic into a generic function, improving the reusability of the code.

Upvotes: -1

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