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cardfile.pas
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Pascal/Delphi Source File
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1989-05-02
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3KB
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137 lines
{ Turbo Cardfile }
{ Copyright (c) 1989 by Borland International, Inc. }
program CardFile;
{ Turbo Pascal 5.5 object-oriented example.
Demonstrates the use of the CARDS unit.
Refer to OOPDEMOS.DOC for an overview of this program.
}
{$S-}
{$M 8192, 65536, 655360}
uses Crt, Objects, Forms, Sliders, Cards;
const
Signature: Longint = $44524143;
var
F: Form;
C: CardList;
S: FStream;
procedure Error(Message: String);
begin
WriteLn(Message, ': ', ParamStr(1));
Halt(1);
end;
procedure ReadCards;
var
Header: Longint;
begin
S.Init(ParamStr(1), SOpen, 1024);
if S.Status <> 0 then Error('Cannot open file');
S.Read(Header, SizeOf(Longint));
if Header <> Signature then Error('File format error');
F.Load(S);
C.Load(S);
if S.Status <> 0 then Error('Disk read error');
S.Done;
end;
function EditCards: Boolean;
var
Ch: Char;
Start, Stop: Boolean;
function EditForm: Boolean;
begin
Color(ForeColor);
GotoXY(1, 25);
Write(' Edit '#179' F2-Accept Esc-Cancel');
ClrEol;
EditForm := F.Edit = CSave;
end;
function Confirm(Message: String): Boolean;
begin
Color(ForeColor);
GotoXY(1, 25);
Write(' ', Message, ' (Y/N)? ');
ClrEol;
Confirm := UpCase(ReadChar) = 'Y';
end;
begin
Color(BackColor);
ClrScr;
Color(ForeColor);
GotoXY(1, 1);
Write(' File ', ParamStr(1));
ClrEol;
Start := True;
Stop := False;
repeat
if C.Count = 0 then F.Clear else F.Put(C.CardData^);
F.Show(Start);
Color(ForeColor);
GotoXY(69, 1);
Write(C.Count: 5, ' Cards');
GotoXY(1, 25);
Write(' Browse '#179' '#25'-Next '#24'-Prev Enter-Edit ' +
'Ins-Insert Del-Delete Esc-Exit ');
ClrEol;
Ch := ReadChar;
if (Ch = CEnter) and (C.Count = 0) then Ch := CIns;
case Ch of
CNext: C.Next;
CPrev: C.Prev;
CEnter: if EditForm then F.Get(C.CardData^);
CIns:
begin
F.Clear;
F.Show(False);
if EditForm then
begin
C.Insert;
F.Get(C.CardData^);
end;
end;
CDel:
if C.Count > 0 then
if Confirm('Delete this card') then C.Delete;
CEsc: Stop := True;
else
Beep;
end;
Start := False;
until Stop;
EditCards := Confirm('Update card file');
NormVideo;
ClrScr;
end;
procedure WriteCards;
begin
S.Init(ParamStr(1), SCreate, 1024);
if S.Status <> 0 then Error('Cannot create file');
S.Write(Signature, SizeOf(Longint));
F.Store(S);
C.Store(S);
S.Flush;
if S.Status <> 0 then Error('Disk write error');
S.Done;
end;
begin
if ParamCount <> 1 then
begin
WriteLn('Usage: CARDFILE filename');
Halt(1);
end;
ReadCards;
if EditCards then WriteCards;
end.