1 | ; File name : menuprog.asm |
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2 | ; Project name : Menu library |
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3 | ; Created date : 23.11.2009 |
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4 | ; Last update : 23.11.2009 |
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5 | ; Author : Tomi Tilli |
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6 | ; Description : ASM library to menu system. |
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7 | ; Contains functions for displaying progress bar dialog. |
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8 | |
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9 | ;--------------- Equates ----------------------------- |
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10 | |
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11 | ; Dialog init and return variables. |
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12 | ; This is an expanded MSGVARS struct. |
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13 | struc PDLGVARS |
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14 | .msgVars resb MSGVARS_size |
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15 | |
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16 | ; Dialog parameters |
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17 | .fpUser resb 4 ; Far pointer to user specific data |
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18 | .ffnTask resb 4 ; Far pointer to task function |
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19 | |
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20 | ; Return variables for different dialogs |
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21 | .wRetUser resb 2 ; User specific return variable |
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22 | endstruc |
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23 | |
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24 | ;-------------------------------------------------------------------- |
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25 | ; Function prototype for Progress Task function (PDLGVARS.fnTask). |
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26 | ; Cursor will be set to Title string location so user may modify the |
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27 | ; title string if needed. |
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28 | ; Remember to return with RETF instead of RET! |
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29 | ; Parameters: |
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30 | ; DS:SI: User specified far pointer |
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31 | ; Returns: |
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32 | ; AX: User specified return code if CF set |
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33 | ; Task completion percentage (0...100) if CF cleared |
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34 | ; CF: Set if task was completed or cancelled |
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35 | ; Cleared if task must be continued |
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36 | ; Corrupts registers: |
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37 | ; BX, CX, DX |
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38 | ;-------------------------------------------------------------------- |
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39 | |
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40 | |
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41 | ;-------------- Private global variables ------------- |
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42 | ; Section containing initialized data |
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43 | ;SECTION .data |
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44 | |
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45 | |
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46 | ;-------------- Public functions --------------------- |
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47 | ; Section containing code |
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48 | SECTION .text |
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49 | |
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50 | |
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51 | ;-------------------------------------------------------------------- |
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52 | ; Displays progress bar dialog. |
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53 | ; |
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54 | ; MenuProg_Show |
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55 | ; Parameters: |
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56 | ; BL: Dialog width with borders included |
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57 | ; BH: Dialog height with borders included |
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58 | ; SS:BP: Ptr to MENUVARS |
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59 | ; ES:DI: Far ptr to user specified task function |
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60 | ; DS:SI: User specified far pointer |
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61 | ; Returns: |
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62 | ; AX: User specified return code |
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63 | ; Corrupts registers: |
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64 | ; BX, CX, DX |
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65 | ;-------------------------------------------------------------------- |
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66 | ALIGN JUMP_ALIGN |
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67 | MenuProg_Show: |
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68 | ; Create stack frame |
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69 | eENTER PDLGVARS_size, 0 |
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70 | sub bp, PDLGVARS_size ; Point to PDLGVARS |
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71 | |
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72 | ; Initialize menu variables |
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73 | mov [bp+MENUVARS.wSize], bx ; Menu size |
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74 | mov [bp+PDLGVARS.fpUser], si ; Store user defined... |
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75 | mov [bp+PDLGVARS.fpUser+2], ds ; ...far pointer |
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76 | mov [bp+PDLGVARS.ffnTask], di ; Store far ptr to... |
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77 | mov [bp+PDLGVARS.ffnTask+2], es ; ...task function |
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78 | mov WORD [bp+MENUVARS.wTopDwnH], 0101h ; 1 title line, 1 info line |
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79 | mov WORD [bp+MENUVARS.fnEvent], MenuProg_Event |
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80 | |
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81 | ; Enter menu |
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82 | call MenuCrsr_GetCenter ; Get X and Y coordinates to DX |
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83 | xor cx, cx ; No menuitems |
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84 | xor bx, bx ; Menu flags |
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85 | xor ax, ax ; Selection timeout (disable) |
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86 | call Menu_Init ; Returns only after dlg closed |
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87 | |
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88 | ; Return |
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89 | mov ax, [bp+PDLGVARS.wRetUser] ; Load user return variable |
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90 | add bp, PDLGVARS_size ; Point to old BP |
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91 | eLEAVE ; Destroy stack frame |
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92 | ret |
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93 | |
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94 | |
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95 | ;-------------- Private functions --------------------- |
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96 | |
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97 | ;-------------------------------------------------------------------- |
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98 | ; Draws progress bar. |
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99 | ; |
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100 | ; MenuProg_DrawBar |
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101 | ; Parameters: |
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102 | ; AX: Completion percentage (0...100) |
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103 | ; SS:BP: Ptr to PDLGVARS |
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104 | ; Returns: |
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105 | ; Nothing |
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106 | ; Corrupts registers: |
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107 | ; AX, BX, CX, DX |
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108 | ;-------------------------------------------------------------------- |
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109 | ALIGN JUMP_ALIGN |
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110 | MenuProg_DrawBar: |
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111 | ; Calculate number of chars to draw |
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112 | eMOVZX cx, BYTE [bp+MENUVARS.bWidth] ; Dialog width to CX |
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113 | sub cl, 4 ; Sub borders, CX=bar width |
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114 | mul cl ; AX=bar with * percentage |
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115 | mov bx, 100 ; Prepare to div by 100 |
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116 | div bl ; AL=Full char cnt |
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117 | sub cl, al ; CX=Empty char cnt |
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118 | mov bl, al ; BX=full char cnt |
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119 | |
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120 | ; Draw full chars |
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121 | mov dl, FULL_BLCK ; Load full block char |
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122 | xchg bx, cx ; CX=full chars, BX=empty chars |
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123 | call Print_Repeat ; Repeat chars |
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124 | mov dl, MIN_BLCK ; Load min block char |
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125 | mov cx, bx ; CX=empty chars |
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126 | call Print_Repeat ; Repeat chars |
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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 | ; File dialog event handler. |
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132 | ; |
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133 | ; MenuProg_Event |
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134 | ; Parameters: |
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135 | ; BX: Callback event |
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136 | ; CX: Selected menuitem index |
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137 | ; DX: Event parameter (event specific) |
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138 | ; SS:BP: Ptr to PDLGVARS |
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139 | ; Returns: |
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140 | ; AH: Event specific or unused |
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141 | ; AL: 1=Event processed |
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142 | ; 0=Event not processed (default action if any) |
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143 | ; Corrupts registers: |
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144 | ; BX, CX, DX |
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145 | ;-------------------------------------------------------------------- |
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146 | ALIGN JUMP_ALIGN |
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147 | MenuProg_Event: |
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148 | cmp bx, EVNT_MNU_UPD ; Update menu string? |
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149 | je .EventUpd ; If so, jump to update |
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150 | xor ax, ax ; Event not processed |
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151 | ret |
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152 | |
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153 | ALIGN JUMP_ALIGN |
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154 | .EventHandled: ; Return point from all handled events |
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155 | mov ax, 1 |
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156 | ret |
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157 | |
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158 | ;-------------------------------------------------------------------- |
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159 | ; EVNT_MNU_UPD event handler. |
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160 | ; |
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161 | ; .EventUpd |
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162 | ; Parameters: |
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163 | ; CX: Index of menuitem to update (MFL_UPD_ITEM only) |
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164 | ; DL: Update flag: |
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165 | ; MFL_UPD_TITLE Set to update title string |
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166 | ; MFL_UPD_NFO Set to update info string |
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167 | ; MFL_UPD_ITEM Set to update menuitem string |
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168 | ; SS:BP: Ptr to PDLGVARS |
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169 | ; Returns: |
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170 | ; AX: 1 (Event processed) |
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171 | ; Corrupts registers: |
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172 | ; BX, CX, DX |
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173 | ;-------------------------------------------------------------------- |
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174 | ALIGN JUMP_ALIGN |
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175 | .EventUpd: |
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176 | test dl, MFL_UPD_NFO ; Update info? |
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177 | jz .EventHandled ; If not, do nothing and return |
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178 | |
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179 | ; Start task |
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180 | push ds |
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181 | push si |
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182 | mov si, [bp+PDLGVARS.fpUser] ; Load offset to user ptr |
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183 | mov ds, [bp+PDLGVARS.fpUser+2] ; Load segment to user ptr |
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184 | xor ax, ax ; Zero percent |
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185 | ALIGN JUMP_ALIGN |
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186 | .TaskLoop: |
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187 | push ax |
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188 | call MenuCrsr_PointInfo ; Point cursor to info string |
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189 | pop ax |
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190 | call MenuProg_DrawBar ; Draw progress bar |
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191 | call MenuCrsr_PointTitle ; Point cursor to title string |
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192 | call far [bp+PDLGVARS.ffnTask] ; Call task function |
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193 | jnc .TaskLoop ; Loop until task complete |
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194 | |
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195 | ; Task complete |
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196 | mov [bp+PDLGVARS.wRetUser], ax ; Store user return value |
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197 | pop si |
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198 | pop ds |
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199 | jmp MenuDlg_ExitHandler ; Close progress bar |
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