mirror of https://github.com/pret/pokecrystal.git
520 lines
7.9 KiB
NASM
520 lines
7.9 KiB
NASM
_InitScrollingMenu::
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xor a
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ld [wMenuJoypad], a
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ldh [hBGMapMode], a
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inc a
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ldh [hInMenu], a
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call InitScrollingMenuCursor
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call ScrollingMenu_InitFlags
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call ScrollingMenu_ValidateSwitchItem
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call ScrollingMenu_InitDisplay
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call ApplyTilemap
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xor a
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ldh [hBGMapMode], a
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ret
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_ScrollingMenu::
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.loop
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call ScrollingMenuJoyAction
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jp c, .exit
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call z, .zero
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jr .loop
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.exit
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call MenuClickSound
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ld [wMenuJoypad], a
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ld a, 0
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ldh [hInMenu], a
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ret
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.zero
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call ScrollingMenu_InitDisplay
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ld a, 1
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ldh [hBGMapMode], a
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ld c, 3
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call DelayFrames
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xor a
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ldh [hBGMapMode], a
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ret
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ScrollingMenu_InitDisplay:
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xor a
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ldh [hBGMapMode], a
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ld hl, wOptions
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ld a, [hl]
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push af
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set NO_TEXT_SCROLL, [hl]
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call ScrollingMenu_UpdateDisplay
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call ScrollingMenu_PlaceCursor
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call ScrollingMenu_CheckCallFunction3
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pop af
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ld [wOptions], a
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ret
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ScrollingMenuJoyAction:
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.loop
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call ScrollingMenuJoypad
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ldh a, [hJoyLast]
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and D_PAD
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ld b, a
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ldh a, [hJoyPressed]
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and BUTTONS
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or b
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bit A_BUTTON_F, a
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jp nz, .a_button
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bit B_BUTTON_F, a
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jp nz, .b_button
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bit SELECT_F, a
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jp nz, .select
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bit START_F, a
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jp nz, .start
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bit D_RIGHT_F, a
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jp nz, .d_right
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bit D_LEFT_F, a
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jp nz, .d_left
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bit D_UP_F, a
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jp nz, .d_up
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bit D_DOWN_F, a
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jp nz, .d_down
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jr .loop
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.no_zero_no_carry ; unreferenced
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ld a, -1
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and a
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ret
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.a_button
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call PlaceHollowCursor
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ld a, [wMenuCursorY]
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dec a
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call ScrollingMenu_GetListItemCoordAndFunctionArgs
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ld a, [wMenuSelection]
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ld [wCurItem], a
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ld a, [wMenuSelectionQuantity]
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ld [wItemQuantity], a
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call ScrollingMenu_GetCursorPosition
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dec a
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ld [wScrollingMenuCursorPosition], a
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ld [wCurItemQuantity], a
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ld a, [wMenuSelection]
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cp -1
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jr z, .b_button
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ld a, A_BUTTON
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scf
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ret
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.b_button
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ld a, B_BUTTON
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scf
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ret
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.select
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ld a, [wMenuDataFlags]
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bit 7, a
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jp z, xor_a_dec_a
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ld a, [wMenuCursorY]
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dec a
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call ScrollingMenu_GetListItemCoordAndFunctionArgs
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ld a, [wMenuSelection]
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cp -1
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jp z, xor_a_dec_a
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call ScrollingMenu_GetCursorPosition
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dec a
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ld [wScrollingMenuCursorPosition], a
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ld a, SELECT
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scf
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ret
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.start
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ld a, [wMenuDataFlags]
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bit 6, a
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jp z, xor_a_dec_a
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ld a, START
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scf
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ret
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.d_left
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ld hl, w2DMenuFlags2
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bit 7, [hl]
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jp z, xor_a_dec_a
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ld a, [wMenuDataFlags]
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bit 3, a
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jp z, xor_a_dec_a
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ld a, D_LEFT
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scf
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ret
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.d_right
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ld hl, w2DMenuFlags2
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bit 7, [hl]
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jp z, xor_a_dec_a
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ld a, [wMenuDataFlags]
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bit 2, a
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jp z, xor_a_dec_a
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ld a, D_RIGHT
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scf
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ret
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.d_up
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ld hl, w2DMenuFlags2
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bit 7, [hl]
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jp z, xor_a
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ld hl, wMenuScrollPosition
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ld a, [hl]
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and a
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jr z, .xor_dec_up
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dec [hl]
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jp xor_a
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.xor_dec_up
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jp xor_a_dec_a
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.d_down
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ld hl, w2DMenuFlags2
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bit 7, [hl]
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jp z, xor_a
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ld hl, wMenuScrollPosition
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ld a, [wMenuData_ScrollingMenuHeight]
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add [hl]
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ld b, a
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ld a, [wScrollingMenuListSize]
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cp b
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jr c, .xor_dec_down
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inc [hl]
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jp xor_a
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.xor_dec_down
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jp xor_a_dec_a
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ScrollingMenu_GetCursorPosition:
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ld a, [wMenuScrollPosition]
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ld c, a
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ld a, [wMenuCursorY]
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add c
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ld c, a
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ret
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ScrollingMenu_ClearLeftColumn:
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call MenuBoxCoord2Tile
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ld de, SCREEN_WIDTH
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add hl, de
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ld de, 2 * SCREEN_WIDTH
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ld a, [wMenuData_ScrollingMenuHeight]
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.loop
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ld [hl], " "
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add hl, de
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dec a
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jr nz, .loop
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ret
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InitScrollingMenuCursor:
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ld hl, wMenuData_ItemsPointerAddr
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ld a, [hli]
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ld h, [hl]
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ld l, a
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ld a, [wMenuData_ItemsPointerBank]
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call GetFarByte
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ld [wScrollingMenuListSize], a
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ld a, [wMenuData_ScrollingMenuHeight]
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ld c, a
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ld a, [wMenuScrollPosition]
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add c
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ld c, a
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ld a, [wScrollingMenuListSize]
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inc a
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cp c
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jr nc, .skip
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ld a, [wMenuData_ScrollingMenuHeight]
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ld c, a
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ld a, [wScrollingMenuListSize]
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inc a
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sub c
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jr nc, .store
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xor a
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.store
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ld [wMenuScrollPosition], a
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.skip
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ld a, [wMenuScrollPosition]
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ld c, a
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ld a, [wMenuCursorPosition]
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add c
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ld b, a
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ld a, [wScrollingMenuListSize]
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inc a
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cp b
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jr c, .wrap
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jr nc, .done
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.wrap
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xor a
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ld [wMenuScrollPosition], a
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ld a, $1
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ld [wMenuCursorPosition], a
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.done
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ret
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ScrollingMenu_InitFlags:
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ld a, [wMenuDataFlags]
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ld c, a
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ld a, [wScrollingMenuListSize]
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ld b, a
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ld a, [wMenuBorderTopCoord]
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add 1
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ld [w2DMenuCursorInitY], a
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ld a, [wMenuBorderLeftCoord]
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add 0
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ld [w2DMenuCursorInitX], a
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ld a, [wMenuData_ScrollingMenuHeight]
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cp b
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jr c, .no_extra_row
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jr z, .no_extra_row
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ld a, b
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inc a
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.no_extra_row
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ld [w2DMenuNumRows], a
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ld a, 1
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ld [w2DMenuNumCols], a
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ld a, $8c
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bit 2, c
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jr z, .skip_set_0
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set 0, a
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.skip_set_0
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bit 3, c
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jr z, .skip_set_1
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set 1, a
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.skip_set_1
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ld [w2DMenuFlags1], a
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xor a
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ld [w2DMenuFlags2], a
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ld a, $20
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ld [w2DMenuCursorOffsets], a
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ld a, A_BUTTON | B_BUTTON | D_UP | D_DOWN
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bit 7, c
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jr z, .disallow_select
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add SELECT
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.disallow_select
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bit 6, c
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jr z, .disallow_start
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add START
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.disallow_start
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ld [wMenuJoypadFilter], a
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ld a, [w2DMenuNumRows]
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ld b, a
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ld a, [wMenuCursorPosition]
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and a
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jr z, .reset_cursor
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cp b
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jr z, .cursor_okay
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jr c, .cursor_okay
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.reset_cursor
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ld a, 1
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.cursor_okay
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ld [wMenuCursorY], a
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ld a, 1
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ld [wMenuCursorX], a
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xor a
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ld [wCursorCurrentTile], a
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ld [wCursorCurrentTile + 1], a
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ld [wCursorOffCharacter], a
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ret
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ScrollingMenu_ValidateSwitchItem:
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ld a, [wScrollingMenuListSize]
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ld c, a
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ld a, [wSwitchItem]
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and a
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jr z, .done
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dec a
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cp c
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jr c, .done
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xor a
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ld [wSwitchItem], a
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.done
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ret
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ScrollingMenu_UpdateDisplay:
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call ClearWholeMenuBox
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ld a, [wMenuDataFlags]
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bit 4, a ; place arrows
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jr z, .okay
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ld a, [wMenuScrollPosition]
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and a
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jr z, .okay
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ld a, [wMenuBorderTopCoord]
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ld b, a
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ld a, [wMenuBorderRightCoord]
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ld c, a
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call Coord2Tile
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ld [hl], "▲"
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.okay
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call MenuBoxCoord2Tile
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ld bc, SCREEN_WIDTH + 1
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add hl, bc
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ld a, [wMenuData_ScrollingMenuHeight]
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ld b, a
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ld c, $0
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.loop
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ld a, [wMenuScrollPosition]
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add c
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ld [wScrollingMenuCursorPosition], a
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ld a, c
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call ScrollingMenu_GetListItemCoordAndFunctionArgs
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ld a, [wMenuSelection]
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cp -1
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jr z, .cancel
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push bc
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push hl
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call ScrollingMenu_CallFunctions1and2
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pop hl
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ld bc, 2 * SCREEN_WIDTH
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add hl, bc
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pop bc
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inc c
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ld a, c
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cp b
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jr nz, .loop
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ld a, [wMenuDataFlags]
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bit 4, a ; place arrows
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jr z, .done
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ld a, [wMenuBorderBottomCoord]
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ld b, a
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ld a, [wMenuBorderRightCoord]
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ld c, a
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call Coord2Tile
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ld [hl], "▼"
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.done
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ret
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.cancel
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ld a, [wMenuDataFlags]
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bit 0, a ; call function on cancel
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jr nz, .call_function
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ld de, .CancelString
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call PlaceString
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ret
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.CancelString
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db "CANCEL@"
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.call_function
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ld d, h
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ld e, l
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ld hl, wMenuData_ScrollingMenuFunction1
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jp CallPointerAt
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ScrollingMenu_CallFunctions1and2:
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push hl
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ld d, h
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ld e, l
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ld hl, wMenuData_ScrollingMenuFunction1
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call CallPointerAt
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pop hl
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ld a, [wMenuData_ScrollingMenuWidth]
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and a
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jr z, .done
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ld e, a
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ld d, 0
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add hl, de
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ld d, h
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ld e, l
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ld hl, wMenuData_ScrollingMenuFunction2
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call CallPointerAt
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.done
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ret
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ScrollingMenu_PlaceCursor:
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ld a, [wSwitchItem]
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and a
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jr z, .done
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ld b, a
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ld a, [wMenuScrollPosition]
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cp b
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jr nc, .done
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ld c, a
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ld a, [wMenuData_ScrollingMenuHeight]
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add c
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cp b
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jr c, .done
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ld a, b
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sub c
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dec a
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add a
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add $1
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ld c, a
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ld a, [wMenuBorderTopCoord]
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add c
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ld b, a
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ld a, [wMenuBorderLeftCoord]
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add $0
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ld c, a
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call Coord2Tile
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ld [hl], "▷"
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.done
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ret
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ScrollingMenu_CheckCallFunction3:
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ld a, [wMenuDataFlags]
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bit 5, a ; call function 3
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ret z
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bit 1, a ; call function 3 if not switching items
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jr z, .call
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ld a, [wSwitchItem]
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and a
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ret nz
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.call
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ld a, [wMenuCursorY]
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dec a
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call ScrollingMenu_GetListItemCoordAndFunctionArgs
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ld hl, wMenuData_ScrollingMenuFunction3
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call CallPointerAt
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ret
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ScrollingMenu_GetListItemCoordAndFunctionArgs:
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push de
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push hl
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ld e, a
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ld a, [wMenuScrollPosition]
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add e
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ld e, a
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ld d, 0
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ld hl, wMenuData_ItemsPointerAddr
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ld a, [hli]
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ld h, [hl]
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ld l, a
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inc hl ; items
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ld a, [wMenuData_ScrollingMenuItemFormat]
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cp SCROLLINGMENU_ITEMS_NORMAL
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jr z, .got_spacing
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cp SCROLLINGMENU_ITEMS_QUANTITY
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jr z, .pointless_jump
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.pointless_jump
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add hl, de
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.got_spacing
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add hl, de
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ld a, [wMenuData_ItemsPointerBank]
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call GetFarByte
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ld [wMenuSelection], a
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ld [wCurItem], a
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inc hl
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ld a, [wMenuData_ItemsPointerBank]
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call GetFarByte
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ld [wMenuSelectionQuantity], a
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pop hl
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pop de
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ret
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