source: xtideuniversalbios/trunk/Assembly_Library/Src/Menu/Dialog/DialogMessage.asm@ 131

Last change on this file since 131 was 58, checked in by Tomi Tilli, 14 years ago

Changes to Assembly Library:

  • Exiting menu with ESC can now be canceled.
File size: 3.4 KB
Line 
1; File name : DialogMessage.asm
2; Project name : Assembly Library
3; Created date : 6.8.2010
4; Last update : 18.11.2010
5; Author : Tomi Tilli
6; Description : Displays message dialog.
7
8; Section containing code
9SECTION .text
10
11;--------------------------------------------------------------------
12; DialogMessage_DisplayMessageWithInputInDSSI
13; Parameters:
14; DS:SI: Ptr to DIALOG_INPUT
15; SS:BP: Ptr to parent MENU
16; Returns:
17; Nothing
18; Corrupts registers:
19; AX, BX, CX, DX, SI, DI
20;--------------------------------------------------------------------
21ALIGN JUMP_ALIGN
22DialogMessage_DisplayMessageWithInputInDSSI:
23 mov bx, MessageEventHandler
24 jmp Dialog_DisplayWithDialogInputInDSSIandHandlerInBX
25
26
27;--------------------------------------------------------------------
28; MessageEventHandler
29; Common parameters for all events:
30; BX: Menu event (anything from MENUEVENT struct)
31; SS:BP: Ptr to DIALOG
32; Common return values for all events:
33; CF: Set if event processed
34; Cleared if event not processed
35; Corrupts registers:
36; All
37;--------------------------------------------------------------------
38ALIGN JUMP_ALIGN
39MessageEventHandler:
40 jmp [cs:bx+.rgfnEventHandlers]
41
42
43ALIGN JUMP_ALIGN
44.InitializeMenuinitFromDSSI:
45 or BYTE [bp+MENU.bFlags], FLG_MENU_USER_HANDLES_SCROLLING | FLG_MENU_NOHIGHLIGHT
46 xor ax, ax ; Cannot be NO_ITEM_HIGHLIGHTED because of scrolling
47 jmp Dialog_EventInitializeMenuinitFromDSSIwithHighlightedItemInAX
48
49
50ALIGN JUMP_ALIGN
51.KeyStrokeInAX:
52 call ProcessMessageScrollingKeysFromAX
53 stc
54 ret
55
56
57ALIGN WORD_ALIGN
58.rgfnEventHandlers:
59istruc MENUEVENT
60 at MENUEVENT.InitializeMenuinitFromDSSI, dw .InitializeMenuinitFromDSSI
61 at MENUEVENT.ExitMenu, dw Dialog_EventExitMenu
62 at MENUEVENT.IdleProcessing, dw Dialog_EventNotHandled
63 at MENUEVENT.ItemHighlightedFromCX, dw Dialog_EventNotHandled
64 at MENUEVENT.ItemSelectedFromCX, dw Dialog_EventAnyThatClosesDialog
65 at MENUEVENT.KeyStrokeInAX, dw .KeyStrokeInAX
66 at MENUEVENT.RefreshTitle, dw Dialog_EventRefreshTitle
67 at MENUEVENT.RefreshInformation, dw Dialog_EventRefreshInformation
68 at MENUEVENT.RefreshItemFromCX, dw Dialog_EventRefreshItemFromCX
69iend
70
71
72;--------------------------------------------------------------------
73; ProcessMessageScrollingKeysFromAX
74; Parameters
75; AL: ASCII character
76; AH: BIOS scan code
77; SS:BP: Ptr to DIALOG
78; Returns:
79; Nothing
80; Corrupts registers:
81; BX, CX, DX, SI, DI
82;--------------------------------------------------------------------
83ALIGN JUMP_ALIGN
84ProcessMessageScrollingKeysFromAX:
85 cmp ah, MENU_KEY_UP
86 je SHORT .DecrementLines
87 cmp ah, MENU_KEY_DOWN
88 je SHORT .IncrementLines
89 jmp MenuLoop_ProcessScrollingKeysFromAX
90
91ALIGN JUMP_ALIGN
92.DecrementLines:
93 cmp WORD [bp+MENUINIT.wHighlightedItem], BYTE 0
94 je SHORT .AlreadyAtTheTopOrBottom
95
96 mov ax, [bp+MENU.wFirstVisibleItem]
97 mov [bp+MENUINIT.wHighlightedItem], ax
98 mov ah, MENU_KEY_UP
99 jmp MenuLoop_ProcessScrollingKeysFromAX
100
101ALIGN JUMP_ALIGN
102.IncrementLines:
103 mov ax, [bp+MENUINIT.wItems]
104 dec ax ; Last possible item to highlight
105 cmp [bp+MENUINIT.wHighlightedItem], ax
106 jae SHORT .AlreadyAtTheTopOrBottom
107
108 call MenuScrollbars_GetLastVisibleItemOnPageToAX
109 mov [bp+MENUINIT.wHighlightedItem], ax
110 mov ah, MENU_KEY_DOWN
111 jmp MenuLoop_ProcessScrollingKeysFromAX
112
113ALIGN JUMP_ALIGN
114.AlreadyAtTheTopOrBottom:
115 ret
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