source: xtideuniversalbios/trunk/Assembly_Library/Src/Menu/MenuInit.asm @ 390

; Project name  :   Assembly Library
; Description   :   Functions for initializing menu system.

;
; XTIDE Universal BIOS and Associated Tools 
; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
; 
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.      
; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
;
                

; Section containing code
SECTION .text

;--------------------------------------------------------------------
; MenuInit_DisplayMenuWithHandlerInBXandUserDataInDXAX
;   Parameters
;       DX:AX:  User specified data
;       BX:     Menu event handler
;   Returns:
;       AX:     Index of selected item or NO_ITEM_SELECTED
;   Corrupts registers:
;       All except segments
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuInit_DisplayMenuWithHandlerInBXandUserDataInDXAX:
    push    es
    push    ds
    xchg    cx, ax          ; Backup user data
    CALL_DISPLAY_LIBRARY    PushDisplayContext

    ; Create MENU struct to stack
    mov     ax, MENU_size
    eENTER_STRUCT   ax
    xchg    ax, cx          ; Restore user data to AX
    call    Memory_ZeroSSBPwithSizeInCX

    ; Display menu
    call    EnterMenuWithHandlerInBXandUserDataInDXAX

    ; Get menu selection and destroy menu variables from stack
    mov     dx, [bp+MENUINIT.wHighlightedItem]
    eLEAVE_STRUCT   MENU_size

    CALL_DISPLAY_LIBRARY    PopDisplayContext
    xchg    ax, dx          ; Return highlighted item in AX
    pop     ds
    pop     es
    ret


;--------------------------------------------------------------------
; EnterMenuWithHandlerInBXandUserDataInDXAX
;   Parameters
;       DX:AX:  User specified data
;       BX:     Menu event handler
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       All, except SS:BP
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
EnterMenuWithHandlerInBXandUserDataInDXAX:
    mov     [bp+MENU.fnEventHandler], bx
    mov     [bp+MENU.dwUserData], ax
    mov     [bp+MENU.dwUserData+2], dx

    mov     ax, CURSOR_HIDDEN
    CALL_DISPLAY_LIBRARY SetCursorShapeFromAX
    call    MenuEvent_InitializeMenuinit    ; User initialization
%ifndef USE_186
    call    MenuInit_RefreshMenuWindow
    jmp     MenuLoop_Enter
%else
    push    MenuLoop_Enter
    ; Fall to MenuInit_RefreshMenuWindow
%endif


;--------------------------------------------------------------------
; MenuInit_RefreshMenuWindow
;   Parameters
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, CX, DX, SI, DI
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuInit_RefreshMenuWindow:
    call    MenuBorders_RefreshAll          ; Draw borders
    call    MenuText_RefreshTitle           ; Draw title strings
    call    MenuText_RefreshAllItems        ; Draw item strings
    jmp     MenuText_RefreshInformation     ; Draw information strings


;--------------------------------------------------------------------
; MenuInit_CloseMenuIfExitEventAllows
;   Parameters
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, DX
;--------------------------------------------------------------------
%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
ALIGN MENU_JUMP_ALIGN
MenuInit_CloseMenuIfExitEventAllows:
    call    MenuEvent_ExitMenu
    jc      SHORT MenuInit_CloseMenuWindow
    ret
%endif


;--------------------------------------------------------------------
; MenuInit_CloseMenuWindow
;   Parameters
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       Nothing
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuInit_CloseMenuWindow:
    or      BYTE [bp+MENU.bFlags], FLG_MENU_EXIT
    ret


;--------------------------------------------------------------------
; MenuInit_HighlightItemFromAX
;   Parameters
;       AX:     Item to highlight
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, CX, DX, SI, DI
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuInit_HighlightItemFromAX:
    sub     ax, [bp+MENUINIT.wHighlightedItem]
    jmp     MenuScrollbars_MoveHighlightedItemByAX

;--------------------------------------------------------------------
; MenuInit_GetHighlightedItemToAX
;   Parameters
;       SS:BP:  Ptr to MENU
;   Returns:
;       AX:     Index of highlighted item or NO_ITEM_HIGHLIGHTED
;   Corrupts registers:
;       Nothing
;--------------------------------------------------------------------
%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
ALIGN MENU_JUMP_ALIGN
MenuInit_GetHighlightedItemToAX:
    mov     ax, [bp+MENUINIT.wHighlightedItem]
    ret
%endif


;--------------------------------------------------------------------
; MenuInit_SetTitleHeightFromAL
; MenuInit_SetInformationHeightFromAL
; MenuInit_SetTotalItemsFromAX
;   Parameters
;       AX/AL:  Parameter
;       SS:BP:      Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       Nothing
;--------------------------------------------------------------------
%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
ALIGN MENU_JUMP_ALIGN
MenuInit_SetTitleHeightFromAL:
    mov     [bp+MENUINIT.bTitleLines], al
    ret

ALIGN MENU_JUMP_ALIGN
MenuInit_SetInformationHeightFromAL:
    mov     [bp+MENUINIT.bInfoLines], al
    ret

ALIGN MENU_JUMP_ALIGN
MenuInit_SetTotalItemsFromAX:
    mov     [bp+MENUINIT.wItems], ax
    ret
%endif


;--------------------------------------------------------------------
; MenuInit_SetUserDataFromDSSI
; MenuInit_GetUserDataToDSSI
;   Parameters
;       DS:SI:  User data (MenuInit_SetUserDataFromDSSI)
;       SS:BP:  Ptr to MENU
;   Returns:
;       DS:SI:  User data (MenuInit_GetUserDataToDSSI)
;   Corrupts registers:
;       Nothing
;--------------------------------------------------------------------
%ifndef EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS
ALIGN MENU_JUMP_ALIGN
MenuInit_SetUserDataFromDSSI:
    mov     [bp+MENU.dwUserData], si
    mov     [bp+MENU.dwUserData+2], ds
    ret

ALIGN MENU_JUMP_ALIGN
MenuInit_GetUserDataToDSSI:
    lds     si, [bp+MENU.dwUserData]
    ret
%endif