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CLOCKS.PAS
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Pascal/Delphi Source File
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1990-12-17
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6KB
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280 lines
unit clocks;
{$X+} {allow discardable function results}
{ Clock-on-a-menubar OOP extension to Turbo Vision apps
Copyright (c) 1990 by Danny Thorpe
Alarms have not been implemented.
}
interface
uses dos, objects, drivers, views, menus, dialogs, app, msgbox;
const cmClockChangeDisplay = 1001;
cmClockSetAlarm = 1002;
ClockNoSecs = 0;
ClockDispSecs = 1;
Clock12hour = 0;
Clock24hour = 1;
type
ClockDataRec = record
Format: word;
Seconds: word;
RefreshStr: String[2];
end;
PClockMenu = ^TClockMenu;
TClockMenu = object(TMenuBar)
ClockOptions: ClockDataRec;
Refresh: byte;
LastTime: DateTime;
TimeStr: string[10];
constructor Init(var Bounds: TRect; Amenu: PMenu);
procedure Draw; virtual;
procedure Update; virtual;
procedure SetRefresh(Secs: integer); virtual;
procedure SetRefreshStr( Secs: string); virtual;
procedure ClockChangeDisplay; virtual;
procedure HandleEvent( var Event: TEvent); virtual;
function FormatTimeStr(h,m,s:word):string; virtual;
end;
implementation
function LeadingZero(w : Word) : String;
var
s : String;
begin
Str(w:0,s);
if Length(s) = 1 then
s := '0' + s;
LeadingZero := s;
end;
constructor TClockMenu.Init(var Bounds: TRect; AMenu: PMenu);
var Temp: PMenuBar;
ClockMenu: PMenu;
R: TRect;
begin
ClockMenu:= NewMenu(NewSubMenu('~'#0'~Clock ', hcNoContext, NewMenu(
NewItem('~C~hange display','',0,cmClockChangeDisplay, hcNoContext,
NewItem('Set ~A~larm','', 0, cmClockSetAlarm, hcNoContext,
nil))),
AMenu^.Items));
{ ^^ tack passed menubar on end of new clock menu }
ClockMenu^.Default:= AMenu^.Default;
TMenuBar.Init(Bounds, ClockMenu);
fillchar(LastTime,sizeof(LastTime),#$FF); {fill with 65000's}
TimeStr:='';
ClockOptions.Format:= Clock24Hour;
ClockOptions.Seconds:= ClockDispSecs;
SetRefresh(1);
end;
procedure TClockMenu.Draw;
var P: PMenuItem;
begin
P:= FindItem(#0);
if P <> nil then
begin
DisposeStr(P^.Name);
P^.Name:= NewStr('~'#0'~'+TimeStr);
end;
TMenuBar.Draw;
end;
procedure TClockMenu.Update;
var h,m,s,hund: word;
begin
GetTime(h,m,s,hund);
if abs(s-LastTime.sec) >= Refresh then
begin
with LastTime do
begin
Hour:=h;
Min:=m;
Sec:=s;
end;
TimeStr:= FormatTimeStr(h,m,s);
DrawView;
end;
end;
procedure TClockMenu.SetRefresh(Secs: integer);
begin
if Secs > 59 then
Secs := 59;
if Secs < 0 then
Secs := 0;
Refresh:= Secs;
Str(Refresh:2,ClockOptions.RefreshStr);
end;
procedure TClockMenu.SetRefreshStr( Secs: string);
var temp,code: integer;
begin
val(Secs, temp, code);
if code = 0 then
SetRefresh(temp);
end;
procedure TClockMenu.ClockChangeDisplay;
var
D: PDialog;
Control: PView;
Command: word;
temp,code: integer;
R: TRect;
ClockData : ClockDataRec;
begin
ClockData := ClockOptions;
R.Assign(14,3,48,15);
D:= new(PDialog, Init(R, 'Clock Display'));
R.Assign(3,3,20,5);
Control:= new(PRadioButtons, Init(R,
NewSItem('~1~2 hour',
NewSItem('~2~4 hour',
nil))));
D^.Insert(Control);
R.Assign(3,2,20,3);
Control:= new(Plabel, Init(R, '~F~ormat', Control));
D^.Insert(Control);
R.Assign(3,6,20,7);
Control:= new(PCheckBoxes, Init(R,
NewSItem('~S~econds',
nil)));
D^.Insert(Control);
R.Assign(16,9,20,10);
Control:= new(PInputLine, Init(R, 2));
D^.Insert(Control);
R.Assign(2,8,20,9);
Control:= new(PLabel, Init(R, '~R~efresh Rate', Control));
D^.Insert(Control);
R.Assign(2,9,15,10);
Control:= new(PLabel, Init(R, '0-59 seconds', PLabel(Control)^.Link));
D^.Insert(Control);
R.Assign(21,3,31,5);
Control:= new(PButton, Init(R, '~O~k', cmOk, bfDefault));
D^.Insert(Control);
R.Assign(21,6,31,8);
Control:= new(PButton, Init(R, '~C~ancel', cmCancel, bfNormal));
D^.Insert(Control);
D^.SelectNext(False);
D^.SetData(ClockData);
repeat
Command:= Desktop^.ExecView(D);
if Command = cmOK then
begin
D^.GetData(ClockData);
val(ClockData.RefreshStr,temp,code);
if (code <> 0) or ((temp<0) or (temp>59)) then
MessageBox('Refresh rate must be between 0 and 59 seconds.',nil,
mfOKButton+mfError);
end;
until (Command = cmCancel)
or ((code=0) and ((temp>=0) and (temp<=59)));
Dispose(D, Done);
if Command = cmOk then
begin
ClockOptions:= ClockData;
SetRefreshStr(ClockData.RefreshStr);
end;
{ update display to reflect changes immediately }
TimeStr:= FormatTimeStr(LastTime.hour, LastTime.min, LastTime.sec);
DrawView;
end;
procedure TClockMenu.HandleEvent( var Event: TEvent);
begin
TMenuBar.HandleEvent( Event);
if Event.What = evCommand then
begin
case Event.Command of
cmClockChangeDisplay: ClockChangeDisplay;
cmClockSetAlarm: ;
end;
end;
end;
function TClockMenu.FormatTimeStr(h,m,s: word): string;
var st, tail: string;
begin
tail:='';
if ClockOptions.Format = Clock24Hour then
st:= LeadingZero(h)
else
begin
if h >= 12 then
begin
tail:= 'pm';
if h>12 then
dec(h,12);
end
else
tail:= 'am';
if h=0 then h:=12; {12 am}
str(h:0,st); { no leading space on hours }
end;
st:=st+':'+ LeadingZero(m);
if ClockOptions.Seconds = ClockDispSecs then
st:= st+':'+LeadingZero(s);
FormatTimeStr:= st + tail;
end;
end.