shithub: pokecrystal

ref: e43c89bc80bb1bb7ff2fc93bb5288f2c0211ea0b
dir: /home/scrolling_menu.asm/

ScrollingMenu::
	call CopyMenuData
	ld a, [hROMBank]
	push af

	ld a, BANK(_ScrollingMenu)
	rst Bankswitch

	call _InitScrollingMenu
	call .UpdatePalettes
	call _ScrollingMenu

	pop af
	rst Bankswitch

	ld a, [wMenuJoypad]
	ret

.UpdatePalettes:
	ld hl, wVramState
	bit 0, [hl]
	jp nz, UpdateTimePals
	jp SetPalettes

InitScrollingMenu::
	ld a, [wMenuBorderTopCoord]
	dec a
	ld b, a
	ld a, [wMenuBorderBottomCoord]
	sub b
	ld d, a
	ld a, [wMenuBorderLeftCoord]
	dec a
	ld c, a
	ld a, [wMenuBorderRightCoord]
	sub c
	ld e, a
	push de
	call Coord2Tile
	pop bc
	jp TextBox

JoyTextDelay_ForcehJoyDown::
	call DelayFrame

	ld a, [hInMenu]
	push af
	ld a, $1
	ld [hInMenu], a
	call JoyTextDelay
	pop af
	ld [hInMenu], a

	ld a, [hJoyLast]
	and D_RIGHT + D_LEFT + D_UP + D_DOWN
	ld c, a
	ld a, [hJoyPressed]
	and A_BUTTON + B_BUTTON + SELECT + START
	or c
	ld c, a
	ret