| 1 | ; File name : MenuEvent.asm
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| 2 | ; Project name : XTIDE Univeral BIOS Configurator
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| 3 | ; Created date : 16.4.2010
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| 4 | ; Last update : 29.4.2010
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| 5 | ; Author : Tomi Tilli
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| 6 | ; Description : Handlers for menu library events.
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| 7 |
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| 8 | ; Section containing code
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| 9 | SECTION .text
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| 10 |
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| 11 | ;--------------------------------------------------------------------
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| 12 | ; Main event handler for all incoming events.
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| 13 | ;
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| 14 | ; MenuEvent_Handler
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| 15 | ; Parameters:
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| 16 | ; BX: Callback event
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| 17 | ; CX: Menuitem index (usually index of selected Menuitem)
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| 18 | ; DX: Event parameter (event specific)
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| 19 | ; SS:BP: Ptr to MENUVARS
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| 20 | ; Returns:
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| 21 | ; AH: Event specific or unused. Set to 0 if unused.
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| 22 | ; AL: 1=Event processed
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| 23 | ; 0=Event not processed (default action if any)
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| 24 | ; Corrupts registers:
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| 25 | ; BX, CX, DX
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| 26 | ;--------------------------------------------------------------------
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| 27 | ALIGN JUMP_ALIGN
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| 28 | MenuEvent_Handler:
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| 29 | push es
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| 30 | push ds
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| 31 | push di
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| 32 | push si
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| 33 |
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| 34 | xor ax, ax ; Event not processed
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| 35 | cmp bx, BYTE EVNT_MNU_INITDONE ; Event in jump table?
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| 36 | ja SHORT .Return
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| 37 | shl bx, 1
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| 38 | call [cs:bx+.rgwEventJmp]
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| 39 | .Return:
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| 40 | pop si
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| 41 | pop di
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| 42 | pop ds
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| 43 | pop es
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| 44 | ret
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| 45 | ALIGN WORD_ALIGN
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| 46 | .rgwEventJmp:
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| 47 | dw MenuEvent_Exit ; 0, EVNT_MNU_EXIT (Menu will quit)
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| 48 | dw MenuEvent_EventItemSelectionChanged ; 1, EVNT_MMU_SELCHG (Menuitem selection changed (with arrows))
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| 49 | dw MenuEvent_EventItemSelected ; 2, EVNT_MNU_SELSET (Menuitem selected (with Enter))
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| 50 | dw MenuEvent_EventKeyPressed ; 3, EVNT_MNU_KEY (Keyboard key pressed)
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| 51 | dw MenuEvent_EventMenuDraw ; 4, EVNT_MNU_UPD (Menu needs to be updated)
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| 52 | dw MenuEvent_EventGetDefaultMenuitem ; 5, EVNT_MNU_GETDEF (Request menuitem to be selected by default)
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| 53 | dw MenuEvent_EventMenuInitDone ; 6, EVNT_MNU_INITDONE (Menu has been initialized but not yet drawn)
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| 54 |
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| 55 |
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| 56 | ;--------------------------------------------------------------------
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| 57 | ; Handles Menu Exit notification (EVNT_MNU_EXIT).
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| 58 | ;
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| 59 | ; MenuEvent_Exit
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| 60 | ; Parameters:
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| 61 | ; SS:BP: Ptr to MENUVARS
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| 62 | ; Returns:
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| 63 | ; AH: 1 to cancel exit
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| 64 | ; 0 to allow menu exit
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| 65 | ; AL: 1 = Event processed
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| 66 | ; Corrupts registers:
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| 67 | ; Nothing
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| 68 | ;--------------------------------------------------------------------
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| 69 | ALIGN JUMP_ALIGN
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| 70 | MenuEvent_Exit:
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| 71 | cmp WORD [bp+MENUVARS.user], g_MenuPageMain ; Exiting main menu?
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| 72 | je SHORT .AskUserAboutQuitting
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| 73 | mov ax, 1 ; Event handled
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| 74 | ret
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| 75 | ALIGN JUMP_ALIGN
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| 76 | .AskUserAboutQuitting:
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| 77 | call BiosFile_SaveUnsavedChanges
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| 78 | mov ax, 1 ; Event handled
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| 79 | ret
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| 80 |
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| 81 |
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| 82 | ;--------------------------------------------------------------------
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| 83 | ; Handles Menuitem Selection Changed notification (EVNT_MMU_SELCHG).
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| 84 | ;
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| 85 | ; MenuEvent_EventItemSelectionChanged
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| 86 | ; Parameters:
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| 87 | ; CX: Index of selected Menuitem
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| 88 | ; SS:BP: Ptr to MENUVARS
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| 89 | ; Returns:
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| 90 | ; AX: 1 = Event processed
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| 91 | ; Corrupts registers:
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| 92 | ; BX, CX, DX, DI
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| 93 | ;--------------------------------------------------------------------
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| 94 | ALIGN JUMP_ALIGN
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| 95 | MenuEvent_EventItemSelectionChanged:
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| 96 | mov dl, MFL_UPD_NFO
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| 97 | call Menu_Invalidate ; Invalidate info message
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| 98 | mov ax, 1 ; Event handled
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| 99 | ret
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| 100 |
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| 101 |
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| 102 | ;--------------------------------------------------------------------
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| 103 | ; Handles Menuitem Selected notification (EVNT_MNU_SELSET).
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| 104 | ;
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| 105 | ; MenuEvent_EventItemSelected
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| 106 | ; Parameters:
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| 107 | ; CX: Index of selected Menuitem
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| 108 | ; SS:BP: Ptr to MENUVARS
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| 109 | ; Returns:
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| 110 | ; AX: 1 = Event processed
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| 111 | ; Corrupts registers:
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| 112 | ; BX, CX, DX, SI, DI, DS, ES
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| 113 | ;--------------------------------------------------------------------
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| 114 | ALIGN JUMP_ALIGN
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| 115 | MenuEvent_EventItemSelected:
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| 116 | lds si, [bp+MENUVARS.user] ; DS:SI now points to MENUPAGE
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| 117 | call MenuPage_GetMenuPageItemForVisibleIndex ; DS:DI now points to MENUPAGEITEM
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| 118 | jnc SHORT .Return
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| 119 | push cx
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| 120 | call [di+MENUPAGEITEM.fnActivate]
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| 121 | pop cx
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| 122 | jnc SHORT .Return ; No changes
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| 123 | mov dl, MFL_UPD_ITEM | MFL_UPD_NOCLEAR
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| 124 | call Menu_Invalidate ; Invalidate menuitem
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| 125 | .Return:
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| 126 | mov ax, 1 ; Event handled
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| 127 | ret
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| 128 |
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| 129 |
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| 130 | ;--------------------------------------------------------------------
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| 131 | ; Handles Key pressed notification (EVNT_MNU_KEY).
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| 132 | ;
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| 133 | ; MenuEvent_EventKeyPressed
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| 134 | ; Parameters:
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| 135 | ; CX: Index of currently selected Menuitem
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| 136 | ; DL: ASCII character
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| 137 | ; DH: BIOS Scan Code
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| 138 | ; SS:BP: Ptr to MENUVARS
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| 139 | ; Returns:
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| 140 | ; AX: 1 = Event processed
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| 141 | ; Corrupts registers:
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| 142 | ; BX, CX, DX, SI, DI, DS, ES
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| 143 | ;--------------------------------------------------------------------
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| 144 | ALIGN JUMP_ALIGN
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| 145 | MenuEvent_EventKeyPressed:
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| 146 | lds si, [bp+MENUVARS.user] ; DS:SI now points to MENUPAGE
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| 147 | call MenuPage_GetMenuPageItemForVisibleIndex ; DS:DI now points to MENUPAGEITEM
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| 148 | jnc SHORT .Return
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| 149 | call MenuEventHotkey_Pressed
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| 150 | .Return:
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| 151 | mov ax, 1
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| 152 | ret
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| 153 |
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| 154 |
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| 155 | ;--------------------------------------------------------------------
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| 156 | ; Handles Menu Update notification (EVNT_MNU_UPD).
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| 157 | ;
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| 158 | ; MenuEvent_EventMenuDraw
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| 159 | ; Parameters:
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| 160 | ; CX: Index of Menuitem to update (if MFL_UPD_ITEM or MFL_UPD_NFO set)
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| 161 | ; DL: Update flag (only one):
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| 162 | ; MFL_UPD_TITLE Update Menu Title string(s)
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| 163 | ; MFL_UPD_NFO Update Menu Info string(s)
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| 164 | ; MFL_UPD_ITEM Update Menuitem string
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| 165 | ; SS:BP: Ptr to MENUVARS
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| 166 | ; Returns:
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| 167 | ; AX: Was event processed
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| 168 | ; Corrupts registers:
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| 169 | ; BX, CX, DX, SI, DI, DS, ES
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| 170 | ;--------------------------------------------------------------------
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| 171 | ALIGN JUMP_ALIGN
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| 172 | MenuEvent_EventMenuDraw:
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| 173 | test dl, MFL_UPD_ITEM ; Need to update Menuitem?
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| 174 | jnz SHORT MenuEvent_DrawMenuitem
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| 175 | test dl, MFL_UPD_NFO ; Need to update Info String(s)?
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| 176 | jnz SHORT MenuEvent_DrawInfo
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| 177 | test dl, MFL_UPD_TITLE ; Need to update Title String(s)?
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| 178 | jnz SHORT MenuEvent_DrawTitle
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| 179 | xor ax, ax
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| 180 | ret
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| 181 |
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| 182 | ;--------------------------------------------------------------------
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| 183 | ; Draws Menuitem string. Cursor is set to a menuitem location.
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| 184 | ;
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| 185 | ; MenuEvent_DrawMenuitem
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| 186 | ; Parameters:
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| 187 | ; CX: Index of Menuitem to draw
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| 188 | ; SS:BP: Ptr to MENUVARS
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| 189 | ; Returns:
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| 190 | ; AX: Was event processed
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| 191 | ; Corrupts registers:
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| 192 | ; BX, CX, DX, SI, DI, DS, ES
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| 193 | ;--------------------------------------------------------------------
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| 194 | ALIGN JUMP_ALIGN
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| 195 | MenuEvent_DrawMenuitem:
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| 196 | lds si, [bp+MENUVARS.user] ; DS:SI now points to MENUPAGE
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| 197 | call MenuPage_GetMenuPageItemForVisibleIndex ; DS:DI now points to MENUPAGEITEM
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| 198 | jnc SHORT .Return
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| 199 | call [di+MENUPAGEITEM.fnNameFormat]
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| 200 | .Return:
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| 201 | mov ax, 1
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| 202 | ret
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| 203 |
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| 204 | ;--------------------------------------------------------------------
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| 205 | ; Draws information strings. Cursor is set to a first information line.
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| 206 | ;
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| 207 | ; MenuEvent_DrawInfo
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| 208 | ; Parameters:
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| 209 | ; CX: Index of selected menuitem
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| 210 | ; SS:BP: Ptr to MENUVARS
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| 211 | ; Returns:
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| 212 | ; AX: Was event processed
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| 213 | ; Corrupts registers:
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| 214 | ; BX, CX, DX, SI, DI, DS, ES
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| 215 | ;--------------------------------------------------------------------
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| 216 | ALIGN JUMP_ALIGN
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| 217 | MenuEvent_DrawInfo:
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| 218 | lds si, [bp+MENUVARS.user] ; DS:SI now points to MENUPAGE
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| 219 | call MenuPage_GetMenuPageItemForVisibleIndex ; DS:DI now points to MENUPAGEITEM
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| 220 | jnc SHORT .Return
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| 221 | call MenuPageItem_PrintInfo
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| 222 | .Return:
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| 223 | mov ax, 1
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| 224 | ret
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| 225 |
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| 226 | ;--------------------------------------------------------------------
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| 227 | ; Draws title strings. Cursor is set to a first title line.
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| 228 | ;
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| 229 | ; MenuEvent_DrawTitle
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| 230 | ; Parameters:
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| 231 | ; SS:BP: Ptr to MENUVARS
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| 232 | ; Returns:
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| 233 | ; AX: Was event processed
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| 234 | ; Corrupts registers:
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| 235 | ; BX, CX, DX, SI, DI, DS, ES
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| 236 | ;--------------------------------------------------------------------
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| 237 | ALIGN JUMP_ALIGN
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| 238 | MenuEvent_DrawTitle:
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| 239 | call FormatTitle_String
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| 240 | mov ax, 1
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| 241 | ret
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| 242 |
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| 243 |
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| 244 | ;--------------------------------------------------------------------
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| 245 | ; Handles Get Default Menuitem notification (EVNT_MNU_GETDEF).
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| 246 | ;
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| 247 | ; MenuEvent_EventGetDefaultMenuitem
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| 248 | ; Parameters:
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| 249 | ; SS:BP: Ptr to MENUVARS
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| 250 | ; Returns:
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| 251 | ; AX: Was event processed
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| 252 | ; CX: Index of menuitem to set selected
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| 253 | ; Corrupts registers:
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| 254 | ; Nothing
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| 255 | ;--------------------------------------------------------------------
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| 256 | ALIGN JUMP_ALIGN
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| 257 | MenuEvent_EventGetDefaultMenuitem:
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| 258 | xor ax, ax ; Not processed, default to menuitem 0
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| 259 | ret
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| 260 |
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| 261 |
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| 262 | ;--------------------------------------------------------------------
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| 263 | ; Handles Menu Initialized notification (EVNT_MNU_INITDONE).
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| 264 | ;
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| 265 | ; MenuEvent_EventMenuInitDone
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| 266 | ; Parameters:
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| 267 | ; SS:BP: Ptr to MENUVARS
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| 268 | ; Returns:
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| 269 | ; AX: Was event processed
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| 270 | ; Corrupts registers:
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| 271 | ; Nothing
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| 272 | ;--------------------------------------------------------------------
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| 273 | ALIGN JUMP_ALIGN
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| 274 | MenuEvent_EventMenuInitDone:
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| 275 | mov ax, 1
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| 276 | ret
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