How to create a health bar that changes size at runtime?

Development Programming & Scripting C++
1

I’m trying to create a health bar that’s scale X changes based on the character’s level. How do I access the size of a progress bar via C++ and change it so that it can be updated while playing?

2

Assuming you have the refence to the UProgressBar and have calculated the percent progress:

UProgressBar* progressBar;

Update the progress like this:

progressBar->SetPercent(percent);

Docs:

UProgressBar | Unreal Engine 5.4 Documentation | Epic Developer Community (epicgames.com)

3

Use a size box. Make the progress bar a child of the size box, and then calculate the percent of your progress bar however you want it.

4

The size of the progress bar not the percentage it’s filled to

5

How is the size defined in the first place ?

If it’s placed in a Canvas Panel, with a fixed size defined, you can change it by accessing its slot as canvas slot (Widget->SlotAsCanvasSlot) and modifying the size there.

Alternatively if you wrap it in a size box with a fixed WidthOverride, you can easily modify that too.

1 Like
6

It’s not defined at all at the moment LOL. I’ve yet to design UI using C++ at all so I’m not sure where to start with what header files to include and classes to use but this puts me in the right direction.