source: xtideuniversalbios/trunk/Assembly_Library/Src/Menu/MenuEvent.asm@ 519

; 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

;--------------------------------------------------------------------
; MenuEvent_InitializeMenuinit
;   Parameters
;       SS:BP:  Ptr to MENU
;   Returns:
;       DS:SI:  Ptr to MENU with MENUINIT initialized from user handler
;       CF:     Set if event processed
;               Cleared if event not processed
;   Corrupts registers:
;       AX, BX, DX
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuEvent_InitializeMenuinit:
    push    ss
    pop     ds
    mov     si, bp
    mov     bl, MENUEVENT_InitializeMenuinitFromDSSI
    jmp     SHORT MenuEvent_SendFromBX


;--------------------------------------------------------------------
; MenuEvent_ExitMenu
;   Parameters
;       SS:BP:  Ptr to MENU
;   Returns:
;       CF:     Set to exit from menu
;               Cleared to cancel exit
;   Corrupts registers:
;       AX, BX, DX
;--------------------------------------------------------------------
%ifndef MENU_NO_ESC
ALIGN MENU_JUMP_ALIGN
MenuEvent_ExitMenu:
    mov     bl, MENUEVENT_ExitMenu
    jmp     SHORT MenuEvent_SendFromBX
%endif


%ifdef MENUEVENT_IDLEPROCESSING_ENABLE
;--------------------------------------------------------------------
; MenuEvent_IdleProcessing
;   Parameters
;       SS:BP:  Ptr to MENU
;   Returns:
;       CF:     Set if event processed
;               Cleared if event not processed
;   Corrupts registers:
;       AX, BX, DX
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuEvent_IdleProcessing:
    mov     bl, MENUEVENT_IdleProcessing
    jmp     SHORT MenuEvent_SendFromBX
%endif

;--------------------------------------------------------------------
; MenuEvent_RefreshTitle
; MenuEvent_RefreshInformation
;   Parameters
;       SS:BP:  Ptr to MENU
;       Cursor will be positioned to beginning of window
;   Returns:
;       CF:     Set if event processed
;               Cleared if event not processed
;   Corrupts registers:
;       AX, CX, BX, DX
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuEvent_RefreshTitle:
    mov     bl, MENUEVENT_RefreshTitle
    SKIP2B  cx  ; mov cx, <next instruction>

MenuEvent_RefreshInformation:
    mov     bl, MENUEVENT_RefreshInformation
    mov     cx, [bp+MENUINIT.wHighlightedItem]
    jmp     SHORT MenuEvent_SendFromBX


;--------------------------------------------------------------------
; MenuEvent_RefreshItemFromCX
;   Parameters
;       CX:     Index of item to refresh
;       SS:BP:  Ptr to MENU
;       Cursor has been positioned to the beginning of item line
;   Returns:
;       CF:     Set if event processed
;               Cleared if event not processed
;   Corrupts registers:
;       AX, BX, DX
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuEvent_RefreshItemFromCX:
    mov     bl, MENUEVENT_RefreshItemFromCX
    jmp     SHORT MenuEvent_SendFromBX


;--------------------------------------------------------------------
; MenuEvent_HighlightItemFromCX
;   Parameters
;       CX:     Index of item to highlight
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, DX, SI, DI
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuEvent_HighlightItemFromCX:
    mov     dx, cx
    xchg    dx, [bp+MENUINIT.wHighlightedItem]
    push    dx

    mov     bl, MENUEVENT_ItemHighlightedFromCX
    call    MenuEvent_SendFromBX

    pop     ax
    call    MenuText_RefreshItemFromAX
    mov     ax, [bp+MENUINIT.wHighlightedItem]
    jmp     MenuText_RefreshItemFromAX


;--------------------------------------------------------------------
; MenuEvent_KeyStrokeInAX
;   Parameters
;       AL:     ASCII character for the key
;       AH:     Keyboard library scan code for the key
;       SS:BP:  Ptr to MENU
;   Returns:
;       CF:     Set if event processed
;               Cleared if event not processed
;   Corrupts registers:
;       AX, BX, DX
;--------------------------------------------------------------------
%ifdef MENUEVENT_KeyStrokeInAX
ALIGN MENU_JUMP_ALIGN
MenuEvent_KeyStrokeInAX:
    mov     bl, MENUEVENT_KeyStrokeInAX
    SKIP2B  dx  ; mov dx, <next instruction>
%endif

;--------------------------------------------------------------------
; MenuEvent_ItemSelectedFromCX
;   Parameters
;       CX:     Index of selected item
;       SS:BP:  Ptr to MENU
;   Returns:
;       CF:     Set if event processed
;               Cleared if event not processed
;   Corrupts registers:
;       AX, BX, DX
;--------------------------------------------------------------------
MenuEvent_ItemSelectedFromCX:
    mov     bl, MENUEVENT_ItemSelectedFromCX
    ; Fall to MenuEvent_SendFromBX


;--------------------------------------------------------------------
; MenuEvent_SendFromBX
;   Parameters
;       BL:                 Menu event to send
;       SS:BP:              Ptr to MENU
;       Other registers:    Event specific parameters
;   Returns:
;       AX, DX:             Event specific return values
;       CF:                 Set if event processed
;                           Cleared if event not processed
;   Corrupts registers:
;       BX
;--------------------------------------------------------------------
ALIGN MENU_JUMP_ALIGN
MenuEvent_SendFromBX:
    push    es
    push    ds
    push    di
    push    si
    push    cx
    xor     bh, bh
    call    [bp+MENU.fnEventHandler]
    pop     cx
    pop     si
    pop     di
    pop     ds
    pop     es
    ret