I've googled this, and I've hunted through the documentation, and I cannot find an answer. I have an app that I'm working on, the graphics portion of which largely just seeds what used to be a console app. I want it so that when the 'Go' button is clicked, the window closes once the main program is complete. How do I code this?
Mailing lists / lazarus / 2012-02
How to close a window from code
9 messages · 6 people · –
- Timothy Groves 3
- Mattias Gaertner 2
- Alexsander Rosa 1
- Mark Morgan Lloyd 1
- Rich Saunders 1
- zeljko 1
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Show quoted text 5 lines
I've googled this, and I've hunted through the documentation, and I
cannot find an answer. I have an app that I'm working on, the graphics
portion of which largely just seeds what used to be a console app. I
want it so that when the 'Go' button is clicked, the window closes once
the main program is complete. How do I code this?
Do you mean a LCL form?
Form1.Close;Mattias
Mattias Gaertner wroteDo you mean a LCL form? Form1.Close;
Well, I tried just Close from within a method of the form in question, and that didn't work. This did. Any explanation as to why? (Perhaps the fact that close is also a Pascal reserved word?)
Show quoted text 5 lines
On 12-02-01 12:14 PM, Mattias Gaertner wrote:
> Do you mean a LCL form? Form1.Close;
Well, I tried just Close from within a method of the form in question,
and that didn't work. This did. Any explanation as to why? (Perhaps
the fact that close is also a Pascal reserved word?)
Did you get a compiler error?
This works too:
procedure TForm1.Button1Click(Sender: TObject);
begin
Close;
end;Mattias
Mattias Gaertner wroteDid you get a compiler error?
No. The program merely hung upon reaching the Close.
Show quoted text 9 lines
This works too:
procedure TForm1.Button1Click(Sender: TObject);
begin
Close;
end;
This did not work for me. However, the Form1.Close version did, and that's what I'm using. Thanks!
Well, I tried just Close from within a method of the form in question, and that didn't…
Timothy Groves wrote 5 lines
On 12-02-01 12:14 PM, Mattias Gaertner wrote:
> Do you mean a LCL form? Form1.Close;
Well, I tried just Close from within a method of the form in question,
and that didn't work. This did. Any explanation as to why? (Perhaps
the fact that close is also a Pascal reserved word?)
Not so much a reserved word as a predefined procedure if you're pulling in the standard libraries.
http://www.freepascal.org/docs-html/rtl/system/filefunctions.html
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
No. The program merely hung upon reaching the Close. This did not work for me. However,…
Timothy Groves wroteHowever, the Form1.Close version did, and that's what I'm using. Thanks!
Tim-
Note that using Self.Close; would be safer and much preferred over Form1.Close; when called within a TForm1 class method.
It does not rely on the Form1 instance reference to be present and usable.
Or even (Self as TForm).Close for that matter.
2012/2/1 Rich Saunders
Show quoted text 10 lines
On 2/1/12 12:49 PM, Timothy Groves wrote:
> However, the Form1.Close version did, and that's what I'm using. Thanks!
Tim-
Note that using Self.Close; would be safer and much preferred over
Form1.Close; when called within a TForm1 class method.
It does not rely on the Form1 instance reference to be present and usable.
Atenciosamente,
Alexsander da Rosa
http://rednaxel.com
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Alexsander Rosa wroteOr even (Self as TForm).Close for that matter.
What if he calls Close from class which isn't TForm ? Form1.Close can be used, but in that case he must take care of Form1 ... anyway it's bad programming tehnique.
zeljko
Show quoted text 14 lines
2012/2/1 Rich Saunders
> On 2/1/12 12:49 PM, Timothy Groves wrote:
> > However, the Form1.Close version did, and that's what I'm using.
> > Thanks!
>
> Tim-
>
> Note that using Self.Close; would be safer and much preferred over
> Form1.Close; when called within a TForm1 class method.
>
> It does not rely on the Form1 instance reference to be present and
> usable.
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