UMG: CanvasPanel children aren't resizing to parent panel

Development Programming & Scripting Blueprint
1

We are attempting to create an empty HUD widget that separate HUD elements can be parented to in order to have a singular parent canvas.

For the parent HUD widget, we are creating a widget with a CanvasPanel (and nothing else).

We have a child HUD widget with a CanvasPanel and a Text child anchored to the lower-right.

When the child is parented via Blueprint (using Add Child to Canvas followed by setting Auto Size to true), the child widget appears to be of an arbitrary size! I would expect it to resize into the parent’s CanvasPanel.

Is this a new/known issue or expected behavior?

Ideally, we want child widgets anchored to a parent widget, so a Status Meter (for example) can be its own widget blueprint anchored to the lower-right. And a central HUD widget parent can be used to change visibility, etc on its children.

Thanks!

2

Auto Size means size the canvas’s slot to match the desired size of the content of the slot.

3

That would explain why Auto Size isn’t the solution. Is there a way to cause the child widget’s CanvasPanel to be auto-sized to its parent?

4

You could change the Anchors of the child’s slot to be min(0,0), max(1,1). If you want the child to fill the parent, why are you using a canvas as the parent widget? An Overlay would be a much better choice if you just want to fill the parent.

5

Thanks! We’ll try that when we next update our HUD. We were using a Canvas out of ignorance. :slight_smile: From reading online, it appeared that the Overlay has a flow control; we were worried about flow control messing with placing multiple screen-sized children into it.

6

I would surely want to know where do you set numbers for anchors

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