How can you tell if a user is at the bottom of a ScrollingFrame?

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#1

How would I accurately see if a user is at the bottom of a ScrollingFrame and can’t scroll down anymore?

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#2

I’m pretty sure you could use the CanvasPosition property of the ScrollingFrame to do this.

Perhaps something like:
if ScrollingFrame.CanvasPosition == Vector2.new(0,0)

Then replace 0,0 with the bottom of your frame.

#3

That’s great but my frame size is frequently changing, so how would I be able to detect the position of the bottom of the frame at any given time?

#4

I’m not on my PC right now, so I can’t check for sure but:

There’s a property which is called CanvasSize which can help you (i believe). You can get the CanvasSize property value, assign that to a variable and then check for that. Something like this:

local sizeVector = Udim2.new(ScrollingFrame.CanvasSize)

if ScrollingFrame.CanvasPosition == sizeVector then

EDIT: It may be AbsoluteWindowSize or another property, apologies as I can't check right now.
#5

The CanvasPosition and CanvasSize values don’t correspond with each other. If my canvas size is 200 pixels but I scroll to the bottom, the canvas position will not be 200. In my case the size was like 1048 but the position was like 30 when I was at the bottom.

#6

Is there a value that does? Like, if you watch the properties tab and scroll down in the ScrollingFrame, does the CanvasPosition match anything else?

#7

It does not, but here’s my scrolling frame and corresponding values:

47 AM
47 AM946×360 8.56 KB

58 AM
58 AM902×50 1.96 KB

#8

Based on the values above, I noticed that the sum of CanvasPositon and AbsoluteSize will equal the CanvasSize whenever you are at the bottom of the frame.

Here’s the code I used to see if the frame was scrolled to the bottom:

if script.Parent.CanvasPosition.Y == script.Parent.CanvasSize.Y.Offset - script.Parent.AbsoluteSize.Y then
	return true
end
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