Lazarus

Free Pascal => Beginners => Topic started by: JLWest on July 01, 2020, 09:06:22 pm

Title: Timezone
Post by: JLWest on July 01, 2020, 09:06:22 pm

Trying to implement an example I found  at  https://wiki.freepascal.org/PascalTZ.

Created a directory and installed the timezone "tzdata'.  I get the error in the use clause that it can't find uPascalTZ.

What am I doing wrong.

Code: Pascal  [Select][+][-]

1. unit Unit1;
2.  
3. {$mode objfpc}{$H+}
4.  
5. interface
6.  
7. uses
8.   Classes, SysUtils, Forms, Controls, Graphics,
9.   DateUtils, uPascalTZ, Dialogs;
10.  
11. type
12.  
13.   { TForm1 }
14.  
15.   TForm1 = class(TForm)
16.     procedure FormCreate(Sender: TObject);
17.  
18.   private
19.  
20.   public
21.  
22.   end;
23.  
24. var
25.   Form1: TForm1;
26.   PascalTZ: TPascalTZ;
27.   DateTime: TDateTime;
28.  
29. implementation
30.  
31. {$R *.lfm}
32.  
33. { TForm1 }
34.  
35. procedure TForm1.FormCreate(Sender: TObject);
36. begin
37.   PascalTZ := TPascalTZ.Create;
38.   PascalTZ.DatabasePath := 'tzdata';
39. end;
40.  
41. end.
42.  

Title: Re: Timezone
Post by: Josh on July 01, 2020, 09:31:03 pm

Hi

Did you install the Component Package, note the component is available using OPM.

The TZ icon will appear in the MISC section of your components pallete.

Title: Re: Timezone
Post by: JLWest on July 01, 2020, 09:52:19 pm

No I haven't. I just looked and I thought to add a package to the IDE was under Tools but I don't see it.

Title: Re: Timezone
Post by: winni on July 01, 2020, 10:46:52 pm

Hi!

Hopefully the data base is suffient clever.

There are really strange things in the time zone DB :

Kiribati and  Hawaii are around at the same longitude.

Hawaii is UTC -10 h
Kiribati is UTC + 14 h

Yes! Kiribati is allways 24 h ahead of Hawaii!

And the half-hour-zones getting less but are still present in a lot of coutries like India, Iran, Australia

And don't look for logic . The Central European Time is in reality the area of 3 zones from western Spain to eastern Poland.

Winni

Title: Re: Timezone
Post by: lucamar on July 02, 2020, 08:46:17 am

Quote from: JLWest on July 01, 2020, 09:52:19 pm

No I haven't. I just looked and I thought to add a package to the IDE was under Tools but I don't see it.

Not under "Tools", but under "Packages". Just one item to the left ;)

Title: Re: Timezone
Post by: JLWest on July 02, 2020, 08:57:24 pm

@lucanar

Thanks. I kind of gave up on that approach to the problem. I did a demo of the problem and posted it.

Getting a little closer to a solution I hope.