Back button

[yugecin]

I like the default back button in osu!, so I made it for opsu! :)

At BackButton.java:83 I check if the back button is skinned by looking at the size of the image, as the commented line above it doesn't seem to work like I thought it would, not sure why.

[itdelatrisu]

Looks great! :) Thanks again!

Could you pull the latest opsu! commits into this?

Comments:

• The reason the commented line doesn't work is because MENU_BACK isn't set to be preloaded, and nothing loads the image before you call hasGameSkinImage(). You should just set the preload flag in GameImage.java: (note - I added this constructor a few commits down from where you branched)

MENU_BACK ("menu-back", "menu-back-%d", "png", false, true),

• The chevron in osu! pulses differently from the logo -- it's an in-out movement instead of exactly "pulsing" on the beat. I think this would look closer, feel free to adjust it though:

float t = (beatProgress < 0.5f) ?
	AnimationEquation.OUT_BACK.calc(beatProgress * 2f) :
	1f - AnimationEquation.LINEAR.calc((beatProgress - 0.5f) * 2f);
int chevronSize = (int) (chevronBaseSize - (isHovered ? 6f : 3f) * t);

[yugecin]

Should be ready to go :)
Didn't notice the chevron, I changed it to IN_QUAD & OUT_BACK

[itdelatrisu]

Tweaked it a bit more, still not accurate but I tried.