What purpose does Update have in Images?

[MCVenor]

Hi,

im currently implementing the UI for my game.
I found an Update method in ImageElement .

What is the intended use for this, when would i like to use it?
Any Example is welcome.

[Ethereal77]

Any UIElement can have time-dependent images or effects.

Currently, the ImageElement uses this method to update the state of the underlying Sprite (for animations, I imagine). Maybe it can also be used for tweening or other UI animations. And in the future, it may be possible to use custom shaders / materials for UI so it can do time-dependent effects, etc.

[MCVenor]

So its like a place that one can fill out if needed? That sounds useful, for like a shiny sprite animation when hoverd over a button.

What if i have 100 buttons and 150 icons on the screen, do i have to implement them myself in order to avoid them being registerd somehow and recieve update "calls" ? ( it might be closer to 40 buttons and 90 icons in my case)

[Ethereal77]

They are always "updated" by the UI system. You don't have to register or do anything at all. They are virtual methods you can override in derived classes if you think you need a derived specialized ImageElement. But unless that is your case, you can just use ImageElement and not override anything.

The current implementation in there is prettly lightweight, just updates the sprite if it has changed (i.e. when you set / unset the sprite via the Source property). Take a look.

[MCVenor]

Great, Thank you.