Daily automation: getting selected radio button


This is truth, the phrase “only one who completely understood the topic can explain it to others” and “to put it so simply that even a five-year old guy would get it”. When I tried to write how to get an item that is selected, such as a radio button, I discovered that it’s not so easy as it should be. If a control containing items does not support SelectionPattern, there is a problem.
This fact led to creation of the Get-UIASelectedItem cmdlet.
To demonstrate how it works, let’s start calc.exe in the Programmer mode:

ipmo [path]\UIAutomation.dll
Start-Process calc -PassThru | Get-UIAWindow | Get-UIAMenuItem -Name View | Invoke-UIAMenuItemExpand | Get-UIAMenuItem -Name Programmer | Invoke-UIAMenuItemClick;

The calc window in this mode looks like:

CalcProgrammerMode001

There are two sets of radio buttons. Unfortunately, containers of these controls do nothing, as they don’t support SelectionPattern. It would be excellent if the following code worked:

# this code does not work
Start-Process calc -PassThru | Get-UIAWindow | Get-UIAImage -Name 'some name' | Get-UIAPaneSelection;

The problem is that none of two images supports SelectionPattern (and this is very atypical for an Image to support the most of the patterns).

This fact forces us to find out a solution using only those patterns that available to us. We know that radio buttons are likely to support SelectionItemPattern. Excellent! Let’s use this pattern.

We can group controls and get only those that are selected:

# this code does not work
Get-UIAImage -AutomationId 1080 | Get-UIARadioButton | Get-UIASelectedItem;

Why does this code not work? The answer is simple: images are not containers for radio buttons. Even though two groups of radio buttons work simultaneously, i.e. there can be selected two radio buttons, one for each image, we can’t rely on images. All radio buttons, by the opinion of MS UI Automation, are under the Pane that includes the most of controls.

Get-UIAPane;

CalcProgrammerMode002
What should we do to get the selected radio button on the upper image? We can group radio button manually and put them as an input to the Get-UIASelectedItem cmdlet:

"hex","dec","oct","bin" | %{ Get-UIARadioButton -Name $_; } | Get-UIASelectedItem | Read-UIAControlName
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