Tk geometry function call

TStanley has asked for the wisdom of the Perl Monks concerning the following question:

I am using the Tk module to build a GUI for my QuizTaker.pl program, and I am running into this small error. The GUI itself is fine, but I get this in the command prompt:

Use of uninitialized value in pattern match (m//) at Gui.pl line 18
[download]

Now here are lines 17 and 18 of my code:

my $Main=new MainWindow(-height=>'100',-width=>'300',-title=>'QuizTake
+r');
$Main->geometry(?\+300,\+300?);
[download]

This is being developed on a Windows NT4 Workstation, using ActiveState Perl 5.6.1, Build 626.

TStanley
--------
There's an infinite number of monkeys outside who want to talk to us
about this script for Hamlet they've worked out
-- Douglas Adams/Hitchhiker's Guide to the Galaxy

Comment on Tk geometry function call Select or Download Code

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Re: Tk geometry function call by runrig (Abbot) on Aug 09, 2001 at 04:21 UTC
The question marks are not part of the syntax. Try: `$Main->geometry("+300+300");` [download]	[reply] [d/l]
Re: Tk geometry function call by dga (Hermit) on Aug 09, 2001 at 02:11 UTC
`$Main->geometry(?\+300,\+300?);` [download] The question marks are like / marks except that the pattern only matches once until you call reset; You will have to quote them or escape them to make it happy.	[reply] [d/l]
Re: Re: Tk geometry function call by TStanley (Canon) on Aug 09, 2001 at 03:12 UTC
I tried this: `$Main->geometry(\?\+300,\+300\?);` [download] However, this is what's returned to me: `search pattern not terminated at GUI.pl line 18` [download] And when I put it in double quotes like this: `$Main->geometry("?+300,+300?");` [download] I get this error: `bad geometry specifier "?+300,+300?" at C:/Perl/site/lib/Tk/Submethod. +pm line 37` [download] TStanley -------- There's an infinite number of monkeys outside who want to talk to us about this script for Hamlet they've worked out -- Douglas Adams/Hitchhiker's Guide to the Galaxy	[reply] [d/l] [select]
Re: Re: Re: Tk geometry function call by clintp (Curate) on Aug 09, 2001 at 04:18 UTC
What are all these question marks? This is not the format for a geometry in Tk. They usually look something like these: `$widget->geometry('640x480'); # Big as a VGA Screen $widget->geometry('+100+200'); # Slightly down to the right $widget->geometry('600x800+50+50'); # Big, out of corner` [download] And other variations. "perldoc Tk::Wm" for more details and options.	[reply] [d/l]
Re: Tk geometry function call by kevin_i_orourke (Friar) on Aug 09, 2001 at 13:52 UTC
I may be missing what you're trying to do here, so ignore me if I'm wrong. The Tk documentation habitually uses `?option?` to indicate optional stuff in commands. You don't need (or want) the question marks in your code. This is a bit of a problem due to a lot of the Perl/Tk docs being copied across from Tcl/Tk, some bits don't follow Perl doc conventions. Hope this helps, Kev Kevin O'Rourke	[reply]