Best way to automatically scale UI to window size?

Hey everyone,

I’ve looked through a couple of old threads and I’m not entirely sure if the advice in them still stands. I’m wondering if there’s a hassle-free way to scale the UI to whatever the window size is in a dynamic way (e.g. someone resizes the resizable window, or goes full-screen). Am I missing a simple setting that I need to enable or is it more complex then that? I know that Unity has the canvas scaler component which uses a reference resolution to automatically scale, but I’ve messed around with ui.SetScale and I wasn’t able to find much success.

Any help would be greatly appreciated!

Seems like a duplicate of:

Thanks for the response, I didn’t see that post before I created this one sorry. I was able to achieve what I wanted to do with the following Lua code:

function ResizeUI()
  local scale = GetScaleFactor(graphics:GetWidth(),
                               graphics:GetHeight(),
                               1920, 1080, 0.5)
  ui:SetScale(scale)
end

SubscribeToEvent("ScreenMode", "ResizeUI")

Where the GetScaleFactor function is the following (mimicks unity’s method of scaling):

local function GetScaleFactor(width, height, refWidth, refHeight, scaleFactor)
  return math.pow(width / refWidth, 1.0 - scaleFactor) *
         math.pow(height / refHeight, scaleFactor)
end

However, I’m running into issues when attempting to scale a BorderImage object to match the screen size. The BorderImage is used as a background, and has the same width/height of the UI (ui.root.[width/height]). Is there any way to make an image ‘stretch’ to always fill the window? I know this behaviour is possible in other engines but I wasn’t able to find a function to do it here. Attached is the problem I’m facing, the white area (a BorderImage) should always stretch to fill the screen. Any help would be greatly appreciated.

UrhoScaleIssue651×953 20.1 KB