Tooltip - Content Size Fitter background image problem

Unity Engine
1

Hi guys,

after months of using it, once in a while the UI system still surprises me with something unexpected. This time is with the nefarious Content Size Fitter + Horizontal Layout Group combo (i’ve seen plenty of posts of people struggling with it).

I am building up a tooltip system that can change size correctly according to the length of the text it contains.
(using this approach Redirecting to latest version of com.unity.ugui)

so I have

Image (with ContentSizeFitter and HorizontalLayoutGroup)

  • Text

It works perfectly as long as I don’t assign any source image to the image (so i leave the default white thingy). If I assign a source image, the tooltip gets stuck in the fixed size of the image i drag and drop there from the inspector.

In searching for an alternative solution, i also made a different test setup

Image (background of the tooltip)

  • Empty UI element (with ContentSizeFitter and HorizontalLayoutGroup)
  • Text

And I tried to change at runtime the size of the root element by retrieving the preferredWidth&Height of the HorizontalLayoutGroup (i know it’s hacky, but i am trying for a solution). The weird thing here is that not only it doesn’t work if i read it on Start(), but it only works on the 2nd Update call (the first still shows 0,0 as preferredW&H).

Is there any clean way to do this or a workaround is the only way to go?

Cheers,
Emiliano

2

Here’s the results on the tooltip script this far, it works, but I get a mega annoying 1-frame flicker (i am a precision freak sorry) when a new tooltip appears and the tooltip size is changed only at the end of the frame. Any solution around that?

Cheers!