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PushWindow::
callfar _PushWindow
ret
ExitMenu::
push af
callfar _ExitMenu
pop af
ret
InitVerticalMenuCursor::
callfar _InitVerticalMenuCursor
ret
CloseWindow::
push af
call ExitMenu
call ApplyTilemap
call UpdateSprites
pop af
ret
RestoreTileBackup::
call MenuBoxCoord2Tile
call .copy
call MenuBoxCoord2Attr
call .copy
ret
.copy
call GetMenuBoxDims
inc b
inc c
.row
push bc
push hl
.col
ld a, [de]
ld [hli], a
dec de
dec c
jr nz, .col
pop hl
ld bc, SCREEN_WIDTH
add hl, bc
pop bc
dec b
jr nz, .row
ret
PopWindow::
ld b, $10
ld de, wMenuFlags
.loop
ld a, [hld]
ld [de], a
inc de
dec b
jr nz, .loop
ret
GetMenuBoxDims::
ld a, [wMenuBorderTopCoord] ; top
ld b, a
ld a, [wMenuBorderBottomCoord] ; bottom
sub b
ld b, a
ld a, [wMenuBorderLeftCoord] ; left
ld c, a
ld a, [wMenuBorderRightCoord] ; right
sub c
ld c, a
ret
CopyMenuData::
push hl
push de
push bc
push af
ld hl, wMenuDataPointer
ld a, [hli]
ld h, [hl]
ld l, a
ld de, wMenuDataFlags
ld bc, wMenuDataEnd - wMenuDataFlags
call CopyBytes
pop af
pop bc
pop de
pop hl
ret
GetWindowStackTop::
ld hl, wWindowStackPointer
ld a, [hli]
ld h, [hl]
ld l, a
inc hl
ld a, [hli]
ld h, [hl]
ld l, a
ret
PlaceVerticalMenuItems::
call CopyMenuData
ld hl, wMenuDataPointer
ld e, [hl]
inc hl
ld d, [hl]
call GetMenuTextStartCoord
call Coord2Tile ; hl now contains the tilemap address where we will start printing text.
inc de
ld a, [de] ; Number of items
inc de
ld b, a
.loop
push bc
call PlaceString
inc de
ld bc, 2 * SCREEN_WIDTH
add hl, bc
pop bc
dec b
jr nz, .loop
ld a, [wMenuDataFlags]
bit 4, a
ret z
call MenuBoxCoord2Tile
ld a, [de]
ld c, a
inc de
ld b, $0
add hl, bc
jp PlaceString
MenuBox::
call MenuBoxCoord2Tile
call GetMenuBoxDims
dec b
dec c
jp TextBox
GetMenuTextStartCoord::
ld a, [wMenuBorderTopCoord]
ld b, a
inc b
ld a, [wMenuBorderLeftCoord]
ld c, a
inc c
; bit 6: if not set, leave extra room on top
ld a, [wMenuDataFlags]
bit 6, a
jr nz, .bit_6_set
inc b
.bit_6_set
; bit 7: if set, leave extra room on the left
ld a, [wMenuDataFlags]
bit 7, a
jr z, .bit_7_clear
inc c
.bit_7_clear
ret
ClearMenuBoxInterior::
call MenuBoxCoord2Tile
ld bc, SCREEN_WIDTH + 1
add hl, bc
call GetMenuBoxDims
dec b
dec c
call ClearBox
ret
ClearWholeMenuBox::
call MenuBoxCoord2Tile
call GetMenuBoxDims
inc c
inc b
call ClearBox
ret
MenuBoxCoord2Tile::
ld a, [wMenuBorderLeftCoord]
ld c, a
ld a, [wMenuBorderTopCoord]
ld b, a
Coord2Tile::
; Return the address of wTileMap(c, b) in hl.
xor a
ld h, a
ld l, b
ld a, c
ld b, h
ld c, l
add hl, hl
add hl, hl
add hl, bc
add hl, hl
add hl, hl
ld c, a
xor a
ld b, a
add hl, bc
bccoord 0, 0
add hl, bc
ret
MenuBoxCoord2Attr::
ld a, [wMenuBorderLeftCoord]
ld c, a
ld a, [wMenuBorderTopCoord]
ld b, a
Coord2Attr::
; Return the address of wAttrMap(c, b) in hl.
xor a
ld h, a
ld l, b
ld a, c
ld b, h
ld c, l
add hl, hl
add hl, hl
add hl, bc
add hl, hl
add hl, hl
ld c, a
xor a
ld b, a
add hl, bc
bccoord 0, 0, wAttrMap
add hl, bc
ret
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