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1 ;=============================================================================
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2 ;
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3 ; File menu_processor.asm combined next generation V3.0.4b
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4 ;
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5 ; Routines to handle all OSTC graphic/text menus.
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6 ;
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7 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved.
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8 ;=============================================================================
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9 ; HISTORY
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10 ; 2011-05-30 : [jDG] Creation.
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11
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12 ; restart menu-system from first icon/line
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13 extern menu_processor_reset
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14
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15 ; recall last (automatically) saved icon/line when returning from submenu
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16 extern menu_processor_pop
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17 extern menu_processor_double_pop
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18
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19 ; execute the menu block
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20 extern menu_processor
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21
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22 ;=============================================================================
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23 ; Menus parameters
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24
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25 ;NOTE: needs to be identical in .inc and .asm files!
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26 #define MENU_LINES_MAX .7 ; max number of lines per screen
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27 #define MENU_HEIGHT .27 ; spacing on screen
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28 #define MENU_VCENTER .125 ; position on screen
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29
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30 ;=============================================================================
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31
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32 COMMON_BEGIN_MENU MACRO dynamic, txt, nb_items
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33 local center
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34
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35 If nb_items > MENU_LINES_MAX
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36 center set MENU_VCENTER - (MENU_HEIGHT/2) * MENU_LINES_MAX
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37 Else
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38 center set MENU_VCENTER - (MENU_HEIGHT/2) * nb_items
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39 Endif
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40
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41 If nb_items <= 0
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42 Error "Zero items in menu ", x
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43 Endif
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44
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45 extern txt
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46 call menu_processor
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47
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48 ; Push 6 bytes of menu header data
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49 db nb_items, dynamic
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50 db LOW(txt), HIGH(txt)
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51 db UPPER(txt), center
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52 ENDM
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53
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54 ;=============================================================================
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55
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56 ; Macro to generat (and check) menu vertical menu blocks with data.
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57
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58 MENU_BEGIN MACRO menu_title, nb_items
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59 COMMON_BEGIN_MENU 0, menu_title, nb_items
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60 ENDM
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61
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62 MENU_BEGIN_DYNAMIC MACRO title_proc, nb_items
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63 COMMON_BEGIN_MENU 1, title_proc, nb_items
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64 ENDM
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65
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66 ;=============================================================================
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67
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68 ; Submenu
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69
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70 MENU_CALL MACRO txt, proc
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71 extern txt
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72 db 0, 0, 0, 0
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73 db LOW(proc), HIGH(proc), UPPER(proc), 0
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74 db LOW(txt), HIGH(txt)
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75 ENDM
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76
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77 ; Generic option menu
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78
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79 MENU_OPTION MACRO txt, option, callback
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80 extern txt
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81 extern option
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82 db 2, LOW(callback), HIGH(callback), UPPER(callback)
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83 db LOW(option), HIGH(option), UPPER(option), 0
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84 db LOW(txt), HIGH(txt)
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85 ENDM
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86
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87 MENU_DYNAMIC MACRO callback, proc
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88 extern callback
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89 db 3, LOW(callback), HIGH(callback), UPPER(callback)
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90 db LOW(proc), HIGH(proc), UPPER(proc), 0
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91 db 0, 0
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92 ENDM
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93
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94 MENU_END MACRO
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95 ENDM
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