Hi
I am creating a time sheets app and using lists to store data.
I have a gallery showing the list in app and allowing for some changes to be made. When selected the item becomes editable, however I would like to prevent changes being made if the work has been approved. I have tried to show what I mean in this image:

At first I thought I could do this by disabling selectable on the gallery and using a pencil icon to select the item, this did not work.
I then tried using an if statement in the gallery selectable but i could not get it to work.
This might not be possible but any help is very much appreciated.
SMC