Dynamic Height for Nested Galleries with dynamic content

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Posted on by CharlesPP

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Hello,

I'm working on a Power Apps canvas project. I have a data source in a "Parent > Child > Sub-child" format. Initially, I wanted to have 2 nested galleries, but I saw that this wasn't possible, so I have a parent gallery with a child gallery, and in this child gallery a ListBox with "SubChild" elements.

My problem is that I can't get all this with the automatic heights, despite the fact that I've tried to follow quite a few tutorials.

I set the ListBox Height to "(CountRows(ThisItem.SubChild) * 41)" which works perfectly, but I can't do it properly with the galleries, as the number of Child and Sub-child varies and flexible galleries doesn't seem to do the job automatically.

Your help will me very much appreciated!

Thank you in advance,

Charles

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CharlesPP 187 on at

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Small update if you need more indications about where am I.
It's pretty close using a flexible height gallery for ParentGallery and a classic gallery for ChildGallery with the "Height" property: "CountRows(Self.AllItems) * (Self.TemplateHeight + Self.TemplatePadding) + Self.TemplatePadding". But the problem concerns the "TemplateSize" property of the ChildGallery.
Well, maybe that's not the solution.

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FC-02051025-0 13 on at

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Hello @CharlesPP any update on this subject? I'm having the same problem here. How did you solved it?

Thanks!

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CharlesPP 187 on at

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Hi @FCLucena , I haven't found an optimal solution to this problem.

In the end, I proceeded by averaging the occupied size (let's say 100) and adding a margin (which gives a total of lets say 110). I've also taken a margin in the case where the first element is large.

This gives a height like this: 100 + [number of elements] x 110

This simply results in a page with white at the bottom, which isn't too bad in my case.
Good luck!

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