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Re^2: How to pass the value of a variable from a child to parent with gui interface?

by ZJ.Mike.2009 (Scribe)
on Mar 13, 2010 at 05:16 UTC ( [id://828402]=note: print w/replies, xml ) Need Help??


in reply to Re: How to pass the value of a variable from a child to parent with gui interface?
in thread How to pass the value of a variable from a child to parent with gui interface?

BrowserUK, thanks for pointing out that Win32::GUI::Dialog() is actually a loop!

I tried the following and it seems to almost get what I was expecting:

while(1){ $display->Show(); $display->SelectAll(); $display->Clear(); $display->Update(); $display->Append($text); $display->Update(); sleep(10); } Win32::GUI::Dialog();

The problem is: the cursor is always busy because of Win32::GUI::Dialog(); loop.

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Re^3: How to pass the value of a variable from a child to parent with gui interface?
by BrowserUk (Patriarch) on Mar 13, 2010 at 05:21 UTC

    The dialog call is now reduntant. Try this:

    use strict; use warnings; use threads; use threads::shared; use Win32::GUI(); my $text :shared; my @h = qw(LINE1 LINE2 LINE3 LINE4 LINE5); my $pid = fork(); if ($pid){ my $main = Win32::GUI::Window->new( -left => 100, -top => 100, -width => 310, -height => 150, ); $main->Show(); my $display = $main->AddTextfield( -left => 60, -top => 35, -width => 180, -height => 20, ); while(1){ $display->Show(); $display->SelectAll(); $display->Clear(); # $display->Update(); $display->Append($text); $display->Update(); sleep(1); } } elsif ($pid == 0) { while(1){ $text = "$h[int(rand(@h))]"; sleep(1); } }

    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.

      Yes, thanks, BrowserUK :)

      the dialog is unnecessary. Now the only problem is that using this approach to display dynamically changing content will cause the cursor to be always in the busy shape.

        Yeah. There's probably a cure for that. Try reading the FAQ.


        Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
        "Science is about questioning the status quo. Questioning authority".
        In the absence of evidence, opinion is indistinguishable from prejudice.

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