Checkbox itemControl on boolean items

[jafeltra]

I noticed that when a Questionnaire item has a type boolean, the itemControl extension with the check-box coding does not impact the controls rendered for that question in LForms. The regular boolean Yes/No/Not Answered radio buttons are rendered. I expected that the radio buttons would be replaced with a single checkbox with no text next to it. We'd like to be able to utilize this with LForms. Is this something you would consider adding support for?

I've attached a sample Questionnaire with a single item demonstrating the behavior - Questionnaire-checkbox-boolean.json. In LForms, this Questionnaire just shows one item with the Yes/No/Not Answered radio button options. I also tested this Questionnaire in the FhirPath Form Tester, and I saw the CSIRO Renderer does support rendering a checkbox on the item with the check-box item control, which is the behavior I was hoping to have in LForms.

[lhcye]

check-box was only for answer lists in R4. It now specifically says it can be used for boolean. We will add this feature. Thanks for reporting this.

[jafeltra]

Thanks!

[lhcye]

We are exploring a few options to render a boolean value as a checkbox. Here are the options:

1. Similar to what the CSIRO renderer does, a checkbox with a "Clear" button. But we'd like to add some text next to the checkbox (Yes/No/Not answered) since an unchecked checkbox could mean either False/No or Not answered. The subtile difference is that when the checked has a false value, the "Clear" button shows up. I think it's less confusing with the text next to the checkbox.
2. Use a 3-state checkbox component, the indeterminate state means not answered. The indeterminate state is indicated with a dash sign. What an indeterminate state means is also a confusing part to users. So here we want to add a text next to it as well.

But you said you wanted "a single checkbox with no text next to it". Is it required in your use case? If not, which option do you prefer? If yes, we might just copy CSIRO renderer's behavior.

[jafeltra]

I don't have a strong preference, so I generally am good with what you all think is best.

Just for clarification, for the first option you listed, would the Yes/No/Not Answered text appear depending on whether the checkbox is checked/not checked/cleared? So if you check the box, it would just say "Yes"? And if you uncheck but don't hit "clear", it would say "No"?

[lhcye]

Yes to all three questions. There will be only one checkbox. The text next to it changes based on the state of the checkbox.

[jafeltra]

Thanks for the clarification! I think of the two options you outlined, I slightly prefer the first option. But I still would defer to what you all think is best for implementing this. The "single checkbox with no text next to it" is not a strict requirement for our use case, so we'd prefer what you think is best for this feature.

[lhcye]

The screenshot below is what we intend to implement. The text next to the checkbox is the state of the checkbox. We might put the text in [], such as [Not answered], [Yes], [No] to somehow indicate it's different than a label. It is not an ideal solution but it avoids adding a "Clear" button. Let me know your opinions on this.

[jafeltra]

I like this solution, thanks!