How to make a card layout collapsable?
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That's not a feature of a!cardLayout(). You could potentially accomplish a similar effect with a!boxLayout(), though.
Also note: there's nothing keeping you from implementing something like this in a!cardLayout() - manually, for yourself. You could have a Rich Text Icon in your card somewhere which, when clicked, hides all contents of the card (other than a "reopen" icon). That wouldn't be very difficult to do, wouldn't require any unusual workarounds, but isn't a built-in feature.
Yes, we can make a box layout using two card layouts and by clicking on the one card we can hide or show the another card.
box layouts now have built-in collapsibility, so this workaround should no longer be needed, fyi.
Yes you are right Mike but Faraz wanted to know "How to make a card layout collapsable?".