ref: 4d93741a54172754aa7ac4d0162343bc0121849d
dir: /engine/scrolling_menu.asm/
_InitScrollingMenu:: ; 245af xor a ld [wMenuJoypad], a ld [hBGMapMode], a inc a ld [hInMenu], a call InitScrollingMenuCursor call ScrollingMenu_InitFlags call ScrollingMenu_ValidateSwitchItem call ScrollingMenu_InitDisplay call ApplyTilemap xor a ld [hBGMapMode], a ret ; 245cb _ScrollingMenu:: ; 245cb .loop call ScrollingMenuJoyAction jp c, .exit call z, .zero jr .loop ; 245d6 .exit ; 245d6 call MenuClickSound ld [wMenuJoypad], a ld a, 0 ld [hInMenu], a ret ; 245e1 .zero ; 245e1 call ScrollingMenu_InitDisplay ld a, 1 ld [hBGMapMode], a ld c, 3 call DelayFrames xor a ld [hBGMapMode], a ret ; 245f1 ScrollingMenu_InitDisplay: ; 245f1 xor a ld [hBGMapMode], a ld hl, Options ld a, [hl] push af set NO_TEXT_SCROLL, [hl] call ScrollingMenu_UpdateDisplay call ScrollingMenu_PlaceCursor call ScrollingMenu_CheckCallFunction3 pop af ld [Options], a ret ; 24609 ScrollingMenuJoyAction: ; 24609 .loop call ScrollingMenuJoypad ld a, [hJoyLast] and D_PAD ld b, a ld a, [hJoyPressed] and BUTTONS or b bit A_BUTTON_F, a jp nz, .a_button bit B_BUTTON_F, a jp nz, .b_button bit SELECT_F, a jp nz, .select bit START_F, a jp nz, .start bit D_RIGHT_F, a jp nz, .d_right bit D_LEFT_F, a jp nz, .d_left bit D_UP_F, a jp nz, .d_up bit D_DOWN_F, a jp nz, .d_down jr .loop ; 24640 .unreferenced ; unused ld a, -1 and a ret ; 24644 .a_button ; 24644 call PlaceHollowCursor ld a, [wMenuCursorY] dec a call ScrollingMenu_GetListItemCoordAndFunctionArgs ld a, [MenuSelection] ld [CurItem], a ld a, [MenuSelectionQuantity] ld [wItemQuantityBuffer], a call ScrollingMenu_GetCursorPosition dec a ld [wScrollingMenuCursorPosition], a ld [CurItemQuantity], a ld a, [MenuSelection] cp -1 jr z, .b_button ld a, A_BUTTON scf ret ; 2466f .b_button ; 2466f ld a, B_BUTTON scf ret ; 24673 .select ; 24673 ld a, [wMenuDataFlags] bit 7, a jp z, xor_a_dec_a ld a, [wMenuCursorY] dec a call ScrollingMenu_GetListItemCoordAndFunctionArgs ld a, [MenuSelection] cp -1 jp z, xor_a_dec_a call ScrollingMenu_GetCursorPosition dec a ld [wScrollingMenuCursorPosition], a ld a, SELECT scf ret ; 24695 .start ; 24695 ld a, [wMenuDataFlags] bit 6, a jp z, xor_a_dec_a ld a, START scf ret ; 246a1 .d_left ; 246a1 ld hl, w2DMenuFlags2 bit 7, [hl] jp z, xor_a_dec_a ld a, [wMenuDataFlags] bit 3, a jp z, xor_a_dec_a ld a, D_LEFT scf ret ; 246b5 .d_right ; 246b5 ld hl, w2DMenuFlags2 bit 7, [hl] jp z, xor_a_dec_a ld a, [wMenuDataFlags] bit 2, a jp z, xor_a_dec_a ld a, D_RIGHT scf ret ; 246c9 .d_up ; 246c9 ld hl, w2DMenuFlags2 bit 7, [hl] jp z, xor_a ld hl, wMenuScrollPosition ld a, [hl] and a jr z, .xor_dec_up dec [hl] jp xor_a .xor_dec_up jp xor_a_dec_a ; 246df .d_down ; 246df ld hl, w2DMenuFlags2 bit 7, [hl] jp z, xor_a ld hl, wMenuScrollPosition ld a, [wMenuData_ScrollingMenuHeight] add [hl] ld b, a ld a, [wScrollingMenuListSize] cp b jr c, .xor_dec_down inc [hl] jp xor_a .xor_dec_down jp xor_a_dec_a ; 246fc ScrollingMenu_GetCursorPosition: ; 246fc ld a, [wMenuScrollPosition] ld c, a ld a, [wMenuCursorY] add c ld c, a ret ; 24706 ScrollingMenu_ClearLeftColumn: ; 24706 (9:4706) call MenuBoxCoord2Tile ld de, SCREEN_WIDTH add hl, de ld de, 2 * SCREEN_WIDTH ld a, [wMenuData_ScrollingMenuHeight] .loop ld [hl], " " add hl, de dec a jr nz, .loop ret InitScrollingMenuCursor: ; 2471a ld hl, wMenuData_ItemsPointerAddr ld a, [hli] ld h, [hl] ld l, a ld a, [wMenuData_ItemsPointerBank] call GetFarByte ld [wScrollingMenuListSize], a ld a, [wMenuData_ScrollingMenuHeight] ld c, a ld a, [wMenuScrollPosition] add c ld c, a ld a, [wScrollingMenuListSize] inc a cp c jr nc, .skip ld a, [wMenuData_ScrollingMenuHeight] ld c, a ld a, [wScrollingMenuListSize] inc a sub c jr nc, .store xor a .store ld [wMenuScrollPosition], a .skip ld a, [wMenuScrollPosition] ld c, a ld a, [wMenuCursorBuffer] add c ld b, a ld a, [wScrollingMenuListSize] inc a cp b jr c, .asm_2475a jr nc, .asm_24763 .asm_2475a xor a ld [wMenuScrollPosition], a ld a, $1 ld [wMenuCursorBuffer], a .asm_24763 ret ; 24764 ScrollingMenu_InitFlags: ; 24764 ld a, [wMenuDataFlags] ld c, a ld a, [wScrollingMenuListSize] ld b, a ld a, [wMenuBorderTopCoord] add 1 ld [w2DMenuCursorInitY], a ld a, [wMenuBorderLeftCoord] add 0 ld [w2DMenuCursorInitX], a ld a, [wMenuData_ScrollingMenuHeight] cp b jr c, .no_extra_row jr z, .no_extra_row ld a, b inc a .no_extra_row ld [w2DMenuNumRows], a ld a, 1 ld [w2DMenuNumCols], a ld a, $8c bit 2, c jr z, .skip_set_0 set 0, a .skip_set_0 bit 3, c jr z, .skip_set_1 set 1, a .skip_set_1 ld [w2DMenuFlags1], a xor a ld [w2DMenuFlags2], a ld a, $20 ld [w2DMenuCursorOffsets], a ld a, A_BUTTON | B_BUTTON | D_UP | D_DOWN bit 7, c jr z, .disallow_select add SELECT .disallow_select bit 6, c jr z, .disallow_start add START .disallow_start ld [wMenuJoypadFilter], a ld a, [w2DMenuNumRows] ld b, a ld a, [wMenuCursorBuffer] and a jr z, .reset_cursor cp b jr z, .cursor_okay jr c, .cursor_okay .reset_cursor ld a, 1 .cursor_okay ld [wMenuCursorY], a ld a, 1 ld [wMenuCursorX], a xor a ld [wCursorCurrentTile], a ld [wCursorCurrentTile + 1], a ld [wCursorOffCharacter], a ret ; 247dd ScrollingMenu_ValidateSwitchItem: ; 247dd ld a, [wScrollingMenuListSize] ld c, a ld a, [wSwitchItem] and a jr z, .done dec a cp c jr c, .done xor a ld [wSwitchItem], a .done ret ; 247f0 ScrollingMenu_UpdateDisplay: ; 247f0 call ClearWholeMenuBox ld a, [wMenuDataFlags] bit 4, a ; place arrows jr z, .okay ld a, [wMenuScrollPosition] and a jr z, .okay ld a, [wMenuBorderTopCoord] ld b, a ld a, [wMenuBorderRightCoord] ld c, a call Coord2Tile ld [hl], "▲" .okay call MenuBoxCoord2Tile ld bc, SCREEN_WIDTH + 1 add hl, bc ld a, [wMenuData_ScrollingMenuHeight] ld b, a ld c, $0 .loop ld a, [wMenuScrollPosition] add c ld [wScrollingMenuCursorPosition], a ld a, c call ScrollingMenu_GetListItemCoordAndFunctionArgs ld a, [MenuSelection] cp -1 jr z, .cancel push bc push hl call ScrollingMenu_CallFunctions1and2 pop hl ld bc, 2 * SCREEN_WIDTH add hl, bc pop bc inc c ld a, c cp b jr nz, .loop ld a, [wMenuDataFlags] bit 4, a ; place arrows jr z, .done ld a, [wMenuBorderBottomCoord] ld b, a ld a, [wMenuBorderRightCoord] ld c, a call Coord2Tile ld [hl], "▼" .done ret .cancel ld a, [wMenuDataFlags] bit 0, a ; call function on cancel jr nz, .call_function ld de, .string_2485f call PlaceString ret .string_2485f db "CANCEL@" .call_function ld d, h ld e, l ld hl, wMenuData_ScrollingMenuFunction1 jp CallPointerAt ; 2486e ScrollingMenu_CallFunctions1and2: ; 2486e push hl ld d, h ld e, l ld hl, wMenuData_ScrollingMenuFunction1 call CallPointerAt pop hl ld a, [wMenuData_ScrollingMenuWidth] and a jr z, .done ld e, a ld d, $0 add hl, de ld d, h ld e, l ld hl, wMenuData_ScrollingMenuFunction2 call CallPointerAt .done ret ; 2488b ScrollingMenu_PlaceCursor: ; 2488b ld a, [wSwitchItem] and a jr z, .done ld b, a ld a, [wMenuScrollPosition] cp b jr nc, .done ld c, a ld a, [wMenuData_ScrollingMenuHeight] add c cp b jr c, .done ld a, b sub c dec a add a add $1 ld c, a ld a, [wMenuBorderTopCoord] add c ld b, a ld a, [wMenuBorderLeftCoord] add $0 ld c, a call Coord2Tile ld [hl], "▷" .done ret ; 248b8 ScrollingMenu_CheckCallFunction3: ; 248b8 ld a, [wMenuDataFlags] bit 5, a ; call function 3 ret z bit 1, a ; call function 3 if not switching items jr z, .call ld a, [wSwitchItem] and a ret nz .call ld a, [wMenuCursorY] dec a call ScrollingMenu_GetListItemCoordAndFunctionArgs ld hl, wMenuData_ScrollingMenuFunction3 call CallPointerAt ret ; 248d5 ScrollingMenu_GetListItemCoordAndFunctionArgs: ; 248d5 push de push hl ld e, a ld a, [wMenuScrollPosition] add e ld e, a ld d, $0 ld hl, wMenuData_ItemsPointerAddr ld a, [hli] ld h, [hl] ld l, a inc hl ; items ld a, [wMenuData_ScrollingMenuSpacing] cp 1 jr z, .got_spacing cp 2 jr z, .pointless_jump .pointless_jump add hl, de .got_spacing add hl, de ld a, [wMenuData_ItemsPointerBank] call GetFarByte ld [MenuSelection], a ld [CurItem], a inc hl ld a, [wMenuData_ItemsPointerBank] call GetFarByte ld [MenuSelectionQuantity], a pop hl pop de ret ; 2490c