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(*
[ NOTES ]
-- Desc --
RmMenu has been created to allow easy, fast, and efficient menu's
that are very versatile and configurable to be created without
the usual amount of bulky, cryptic code and time consuming
initialization, in fact, RmMenu uses and needs NO initalization
of any variables.
-- Legal --
RmMenu was created by Brad Zavitsky and all rights are reserved.
Use at your own risk, the author(s) will not take any responsibility.
SWAG use and commercial use is fine, RmMenu is FreeWare.
Use of RmMenu is allowed free of charge provided that the CopyRight
procedure is not altered and is not removed at the initialization
part of the unit and optionally credit is given to me, the author
for the unit.
-- Switches --
DEBUG : Define this to use the compiler directives for use with
debugging. RmMenu has already been debugged so you should
not have to use this at all.
FASTW : This is on by default, remove it below to use CRT's slower
writes instead of the special FASTWRITE procedure.
-- Info --
Code size : 1121 bytes
Data size : 0 bytes
Stack size : 0 bytes
Min heap : 0 bytes
Max heap : 0 bytes
*)
{$DEFINE FASTW}
{$IFDEF DEBUG}
{$A+,B-,D+,F-,G-,I+,K-,L+,N-,O-,E-,P-,Q+,R+,S+,T-,V-,W-,X+,Y-}
{$ELSE}
{$A+,B-,D-,F-,G-,I-,K-,L-,N-,O-,E-,P-,Q-,R-,S-,T-,V-,W-,X+,Y-}
{$ENDIf}
Unit RmMenu;
Interface
Uses Crt;
Const
Max_Choices = 10;
Type Menu_Typ = Record
Options : array[1..max_choices] of string[20];
Key : array[1..max_choices] of char;
X : array[1..max_choices] of byte;
Y : array[1..max_choices] of byte;
Num_Opt : byte;
Hi_Col : byte;
Norm_Col : byte;
HotKey : boolean; { This option allows a choice to be higlighted by pressing it's KEY }
HotExit : boolean; { This option allows exit on HotKey }
End;
Procedure Menu(Menu_Dat : Menu_Typ; Var CChoice : Byte;Change : Boolean);
far;
Implementation
Procedure Copyright; Near; Assembler;
{ This MAY NOT be removed }
asm
JMP @@1
DB 13,10,'RmMenu Unit (C)1995 by Brad Zavitsky. All rights reserved.',13,10
@@1:
end;
PROCEDURE FastWrite(Col, Row, Attr : Byte; Str : String); NEAR; ASSEMBLER;
{ This procedure is the only one which is not mine }
ASM
PUSH DS {Save DS}
MOV DL,CheckSnow {Save CheckSnow Setting}
MOV ES,SegB800 {ES = Colour Screen Segment}
MOV SI,SegB000 {SI = Mono Screen Segment}
MOV DS,Seg0040 {DS = ROM Bios Segment}
MOV BX,[49h] {BL = CRT Mode, BH = ScreenWidth}
MOV AL,Row {AL = Row No}
MUL BH {AX = Row * ScreenWidth}
XOR CH,CH {CH = 0}
MOV CL,Col {CX = Column No}
ADD AX,CX {(Row*ScreenWidth)+Column}
ADD AX,AX {Multiply by 2 (2 Byte per Position)}
MOV DI,AX {DI = Screen Offset}
CMP BL,7 {CRT Mode = Mono?}
JNE @@DestSet {No - Use Colour Screen Segment}
MOV ES,SI {Yes - ES = Mono Screen Segment}
XOR DX,DX {Force jump to FWrite}
@@DestSet: {ES:DI = Screen Destination Address}
LDS SI,Str {DS:SI = Source String}
CLD {Move Forward through String}
LODSB {Get Length Byte of String}
MOV CL,AL {CX = Input String Length}
JCXZ @@Done {Exit if Null String}
MOV AH,Attr {AH = Attribute}
OR DL,DL {Test Mono/CheckSnow Flag}
JZ @@FWrite {Snow Checking Disabled or Mono - Use FWrite}
{Output during Screen Retrace's}
MOV DX,003DAh {6845 Status Port}
@@WaitLoop: {Output during Retrace's}
MOV BL,[SI] {Load Next Character into BL}
INC SI {Update Source Pointer}
CLI {Interrupts off}
@@Wait1: {Wait for End of Retrace}
IN AL,DX {Get 6845 status}
TEST AL,8 {Vertical Retrace in Progress?}
JNZ @@Write {Yes - Output Next Char}
SHR AL,1 {Horizontal Retrace in Progress?}
JC @@Wait1 {Yes - Wait until End of Retrace}
@@Wait2: {Wait for Start of Next Retrace}
IN AL,DX {Get 6845 status}
SHR AL,1 {Horizontal Retrace in Progress?}
JNC @@Wait2 {No - Wait until Retrace Starts}
@@Write: {Output Char and Attribute}
MOV AL,BL {Put Char to Write into AL}
STOSW {Store Character and Attribute}
STI {Interrupts On}
LOOP @@WaitLoop {Repeat for Each Character}
JMP @@Done {Exit}
{Ignore Screen Retrace's}
@@FWrite: {Output Ignoring Retrace's}
TEST SI,1 {DS:SI an Even Offset?}
JZ @@Words {Yes - Skip (On Even Boundary)}
LODSB {Get 1st Char}
STOSW {Write 1st Char and Attrib}
DEC CX {Decrement Count}
JCXZ @@Done {Finished if only 1 Char in Str}
@@Words: {DS:SI Now on Word Boundary}
SHR CX,1 {CX = Char Pairs, Set CF if Odd Byte Left}
JZ @@ChkOdd {Skip if No Pairs to Store}
@@Loop: {Loop Outputing 2 Chars per Loop}
MOV BH,AH {BH = Attrib}
LODSW {Load 2 Chars}
XCHG AH,BH {AL = 1st Char, AH = Attrib, BH = 2nd Char}
STOSW {Store 1st Char and Attrib}
MOV AL,BH {AL = 2nd Char}
STOSW {Store 2nd Char and Attrib}
LOOP @@Loop {Repeat for Each Pair of Chars}
@@ChkOdd: {Check for Final Char}
JNC @@Done {Skip if No Odd Char to Display}
LODSB {Get Last Char}
STOSW {Store Last Char and Attribute}
@@Done: {Finished}
POP DS {Restore DS}
END;
Procedure Hilight(Menu_Dat : Menu_Typ; ChoiceNum : byte); Near;
Begin
With Menu_Dat do
{$IFDEF FASTW}
FastWrite(X[ChoiceNum],Y[ChoiceNum],Hi_Col,Options[choiceNum]);
{$ELSE}
Begin
Gotoxy(X[choiceNum],Y[ChoiceNum]);
TextAttr := Hi_Col;
Write(Options[ChoiceNum]);
End;{With Menu_Dat}
{$ENDIF}
End;
Procedure UnHilight(Menu_Dat : Menu_Typ; ChoiceNum : byte); Near;
Begin
With Menu_Dat do
{$IFDEF FASTW}
FastWrite(X[ChoiceNum],Y[ChoiceNum],Norm_Col,Options[choiceNum]);
{$ELSE}
Begin
Gotoxy(X[choiceNum],Y[ChoiceNum]);
TextAttr := Norm_Col;
Write(Options[ChoiceNum]);
End;{With Menu_Dat}
{$ENDIF}
End;
Procedure ShowMenu(Menu_Dat : Menu_Typ); Near;
Var B : Byte;
Begin
For B := 1 to Menu_Dat.Num_Opt do unhilight(Menu_Dat,B);
End;
Function HotKeyFound(Menu_Dat : Menu_Typ; Ch : Char) : byte; Near;
Var B : Byte;
Begin
HotKeyFound := 0; {Not found}
CH := UpCase(Ch);
For B := 1 to menu_dat.num_opt do
Begin
if upcase(Menu_Dat.key[b]) = CH then
Begin
HotKeyFound := B;
Exit;
End;
End;
End;
Procedure Menu(Menu_Dat : Menu_Typ; Var CChoice : Byte;Change : Boolean);
{ returns choice, 0 if <Esc> or Tab ; }
{ Change means allow change field, ie.. Allows TAB/ESC to end }
Var
Ch : Char;
Done : Boolean;
oldC, B : Byte;
Begin
Done := False;
IF (CCHoice = 0) or (CChoice > Menu_Dat.num_Opt) then CChoice := 1;
OldC := CChoice;
ShowMenu(Menu_Dat);
Hilight(menu_dat, CChoice);
Repeat
Ch := Readkey;
If CH = #0 then
Begin{function key}
CH := Readkey;
If CH=#77 then CH:=#80;
IF CH=#75 then CH:=#72;
Case CH of
#72 : {Up}
If CChoice > 1 then
begin
unhilight(menu_dat, CChoice);
dec(CChoice);
End Else
Begin
unhilight(menu_dat, CChoice);
CChoice := menu_dat.num_opt;
End;
#80 : {Down}
If CChoice < Menu_Dat.num_opt then
begin
unhilight(menu_dat, CChoice);
inc(CChoice);
End Else
Begin
unhilight(menu_dat, CChoice);
CChoice := 1;
End;
#71 : {Home}
If CChoice <> 1 then
begin
unhilight(menu_dat, CChoice);
CChoice := 1;
End;
#79 : {End}
If CChoice < Menu_Dat.Num_Opt then
begin
unhilight(menu_dat, CChoice);
CChoice := Menu_Dat.Num_Opt;
End;
End;{Case}
End Else
Case CH of
#27,#9 : If Change then
Begin
CChoice := 0;
Exit;
End;
#13 :
Begin
Exit;
End;
Else if menu_dat.hotkey then
Begin
B := HotKeyFound(Menu_Dat, ch);
If (B <> 0) then
Begin
If (B <> CChoice) then
Begin
Unhilight(menu_dat, CChoice);
CChoice := B;
HiLight(Menu_dat,CChoice);
OldC := CChoice;
End;{(B <> CChoice)}
If menu_dat.hotexit then Exit;
End;{ (B <> 0) }
End; { menu_dat.hotkey }
End;{Case}
If OldC <> CChoice then HiLight(Menu_Dat, CChoice);
OldC := CChoice;
Until Done;
End;
Begin
Copyright;
End.
--[ Sample Program ]--
Program test;
Uses Crt, RMMENU;
Var
MenuC : Menu_Typ;
B : byte;
TempS : String;
begin
With MenuC do
Begin
options[1] := 'Continue';
options[2] := 'Quit';
options[3] := 'Abort';
key[1] := 'C';
key[2] := 'Q';
key[3] := 'A';
y[1] := 2;
y[2] := y[1];
y[3] := y[1];
x[1] := 2;
x[2] := X[1] + length(options[1])+1;
x[3] := x[2] + length(options[2])+1;
Num_Opt := 3;
Hi_Col := 30;
HotKey := True; {This allows one keypress picks}
HotExit := False; {This allows to exit on Hotkey}
Norm_Col := 31;
End;
TextAttr := 80;
ClrScr;
B := 1;
Repeat
Menu(MenuC, B, True);
Until B <> 1;
writeln;
Writeln;
If B <> 0 then Writeln('You have picked choice number ', B,'.')
else writeln('You have either pressed <ESC> or TAB to change fields');
Readln;
End.
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