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Controls Should Only be Visible in Specific Item of Gallery

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Posted on by Phineas

5,325 Super User 2025 Season 2

I have Gallery1, in which there is a 'Trash' icon that allows the user to delete that item in the gallery with -
Remove(Subscriber_Address_List,ThisItem)

There is a desire to provide a message that asks the user if they want to delete this item, to minimize unintended deletes.

To that end, I have added a Label1 (with the message), and a 'Yes' and 'No' button.

The 'Yes' button now has the Remove(Subscriber_Address_List,ThisItem) formula, as well as Set(varDeleteControlsVisible, false).

The 'Trash' icon now has Set(varDeleteControlsVisible, true).

The 'No' button has Set(varDeleteControlsVisible, false).

My issue, when the 'Trash' icon is pressed the other controls appears in each item of Gallery1. Is there a formula I can use that when the 'Trash' icon is pressed the other control appear only in the item in which the 'Trash' icon was pressed and nowhere else?

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Kirkby 647 Moderator on at

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Hi @Phineas

The visibility of the DeleteControl(that has message and buttons) for all items is determined all at once by the variable varDeleteControlsVisible.

Would you try this?

1)TrashIcon - OnSelect : UpdateContext({selectedItem:ThisItem.KeyOfTheItem});

2)DeleteControl that has Yes/No buttons - Visible : selectedItem = ThisItem.KeyOfTheItem
Only the selected item has buttons, as determined by the above code that checks which item is selected.

Kirkby

(If you found my answer helpful, I'd appreciate it if you could mark it as 'Accept as solution' or give it a thumbs up.)

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Phineas 5,325 Super User 2025 Season 2 on at

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What am I doing wrong?

I only get an error.

All of the controls are in Gallery1.

'Trash' icon now has in the 'OnSelect' - UpdateContext({selectedItem:ThisItem.KeyOfTheItem})
Error: "KeyOfTheItem" isn't recognized".
"Incompatible type. We can't evaluate your formula because the content variable types are incompatible
with the types of values in other places in your app."

The 'Yes' delete buttons has - selectedItem = ThisItem.KeyOfTheItem
Error: "Incompatible types for comparison. These types can't be compare. Error, Error."

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Kirkby 647 Moderator on at

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Hi.
The term 'KeyofTheItem' refers to key information that distinguishes items in the gallery, such as ID,S/N or ItemId. KeyOfTheItem was just an example.

Please update 'KeyofTheItem' with the appropriate key name. What is the primary key of the items in the gallery? CML_ID is your P.K in the list ~~SPO~~?

If so, ThisItem.KeyOfTheItem ==> ThisItem.CML_ID 🙂

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Phineas 5,325 Super User 2025 Season 2 on at

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Got it.

Made that 'KeyOfTheItem' change to 'ID'.

That error went away.

However, my 'Delete' controls (Label1, 'Yes' and 'No' buttons) are still appearing on each line.

The below represents what the Visible for each has in it.

If I change the Visible to ThisItem.KeyOfTheItem I get errors. I'm sure this is not correct. What should the visible of each?

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Kirkby 647 Moderator on at

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varDeleteControlIsVisible is reflected uniformly across all items, so all delete controls will be displayed. The Visible property should be changed to True or False for each individual item at every single time by action of an user, so please enter "selectedItem = ThisItem.ID" instead of using the variable.

The result of logical expression, "selectedItem = ThisItem.ID" (Don't miss "selectedItem=", and Not ThisItem.Key....) decides Visible value to display the control.

Additionally, since the Delete control includes two buttons, it is cumbersome to manage the Visible property for each. Placing the Delete Control (with two buttons) in a Container "as a parent" and activating the Visible property of the container with selectedItem = ThisItem.ID would be more convenient.

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Phineas 5,325 Super User 2025 Season 2 on at

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Yes, sir.

That's the ticket!

One last; The 'Trash' icon has the following in the 'OnSelect' to control the visibility of those delete controls.

I am now only seeing the controls in the specific item in which the 'Trash' icon is pressed.

What code should be in the 'Yes' and 'No' buttons to hide them once the are clicked, returning the Gallery to its default state where delete buttons/label are hidden?

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Kirkby 647 Moderator on at

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UpdateContext({selectedItem:"NOTHING_SELECTED"}); //OnSelect of yes and no button

Any value would work unless it is duplicated with keys in the list. An empty string ("") or meaningless "dkiwjidsdskewdwwew" would also work. That is like setting the visible value to false again as if no item has been selected yet.

If ID is not a text but a number, set a random integer that is not expected to come out from your data instead

Kirkby

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Phineas 5,325 Super User 2025 Season 2 on at

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When I put UpdateContext({selectedItem:" "}) in the 'OnSelect' of the 'Yes' button I get an error in and the other two controls.

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Kirkby 647 Moderator on at

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what is the error message?

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Phineas 5,325 Super User 2025 Season 2 on at

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"Incompatible types for comparison. These types can't be compared. Error, Error."

I only had the formula to the 'Yes' button, as a test.

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