Nested gallery item not maintaining fill

[Gareth1]

I'm working with a nested gallery inside another gallery with a list of questions and a label for the response and I'm having some trouble with setting the fill of the selected item

If I use the following on the Label I sometimes have to click twice before it recognises that the item is selected

If(ThisItem.IsSelected, btnStyle.DisabledFill, btnStyle.Fill)

I think this is related to the OnSelect function of the nested gallery item where I am patching the collection used by the parent gallery based on the response selected

Patch(
    CollectQuestions,
    LookUp(
        CollectQuestions,
        ID = checklistQuestionList.Selected.ID
    ),
    {Response: ThisItem.Response}
);

I can see that the value is updating but the fill value doesn't update it until it is selected the second time

I'm relatively new to PowerApps but would appreciate any help or pointing in the right direction

ThanksFirst PressSecond Press

[WarrenBelz]

Hi @Gareth1 ,

The  setting you have Is the only one that will set the TemplateFill of any gallery selected item, primary or nested. What I believe is happening is that the first click is selecting the primary gallery, then the next one the nested item. There is nothing else you can set on this.

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[v-yutliu-msft · Accepted solution]

Hi @Gareth1 ,

I agree with @WarrenBelz .

Your settings about your gallery has no problem.

The key point should be the selecting position.

If you want to select one item of the nested gallery, you should click inside the nested gallery.

If you click outside the nested gallery, inside the outside gallery, it will not reflect one selected item in nested gallery.

1)click inside the nested gallery:

2)click outside the nested gallery:

What's more, if you think your data does not fresh immediately after you update data source, you could add a refresh function after the patch function.

Please notice that fresh function only works for data source, not work for collection.

Just like this:

Patch(
    CollectQuestions,
    LookUp(
        CollectQuestions,
        ID = checklistQuestionList.Selected.ID
    ),
    {Response: ThisItem.Response}
);
Refresh(CollectQuestions)

Best regards,

[Gareth1]

Hi @WarrenBelz 

Thanks for the response. 

With both responses I was able to get a better understanding of why the issue was occurring

[Gareth1]

Hi @v-yutliu-msft 

Thanks for the explanation. Gave me a better understanding of how it works