perl-win32-gui-users — Using the Win32::GUI Perl extension

Re: [perl-win32-gui-users] LWP + Fork + Win32::GUI

[Alex L. <sim...@ya...>]

Did you try using: Win32::Shell::Execute instead of fork.  I had a lot of problem with fork under
win32 in the past and finally found this little gem.  

Alex ;)

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[perl-win32-gui-users] Calculator Control

[Eric H. <eri...@ch...>]

I need a control that will allow my users to key in a number(qty) or
decimal number (money amount) using just their mouse. A calculator
control with numbers 0-9 btns, plus these btns:   sign toggle, clear,
clear entry, decimal.   Has anyone made one of these with GUI and can
you share the code please.  Thank you.    Eric

Re: [perl-win32-gui-users] LWP + Fork + Win32::GUI

[Johan L. <jo...@ba...>]

At 10:37 2002-10-17 -0400, Michael Alaly wrote:
>off-list I would apprecaite it. I am new to Win32::GUI and forking and am
>trying to do something very similar to what it looked like you were trying
>to do. I am attempting to take a list of links from a ListView and send them
>each to a child for download. I am running into lots of problems with fork
>and page faults that I can't seem to solve.

fork under Win32 is emulated using IThreads (the only use of IThreads in 
5.6.1). They seem to work fine using pure Perl, but XS code is more 
difficult (Win32::GUI is XS, and it also allocates Windows resources). Any 
solution with fork + Perl 5.6.1 should be considered unstable unless tested 
a _lot_. And I still woulnd't trust it :)

IThreads in Perl 5.8 is supposed to be a lot better. So when ActiveState 
releases a 5.8 distro, maybe we can make use for it.

I think one of the new things is that variables aren't shared between 
threads unless you say so. And that, I hope, may solve the entire problem 
with non-reentrant XS code and such.

That would be _real_ nice!


/J

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[perl-win32-gui-users] Win32::GUI and Fork - Page Faults

[Michael A. <mi...@fl...>]

I am using perl 5.61 from ActiveState.
I am using Win32::GUI .558 binary install from ActiveState.

The following is a modified code snippet that I took from a post in the
Win32::GUI archived mailing list. The original post concerned crashing with
a simple Win32::GUI and fork. I simplified the original and I also have an
error when I click the button a few times in a row (sometimes its after 10,
other times its after 3 clicks).

I cannot understand why I am getting the page faults. The fork doesn't do
anything whatsoever. Is this a problem with Win32::GUI and thread safety or
is this a problem with perl's forking under windows?

Thanks in advance for any assistance,
Michael

---------
 use Win32::GUI;
 use Win32::API;

 my $win = Win32::GUI::Window->new (
  -top  => 0,
  -left  => 0,
  -width     => 200,
  -height    => 200,
     -minsize => 200,200
  -text  => "Main",
  -name  => "winMain",
 );

 my $download = $win->AddButton(
  -text  => "test",
  -left  => 100,
  -top  => 100,
  -height  => 25,
  -name  => "download",
 );

 sub download_Click {
  $download->Disable();
  if ($error=fork() ) {}
  else {
     $download->Enable();
     exit(0);
  }
  return 1;
 }

 sub winMain_Terminate {
  $win->Hide();
  return -1;
 }

 $win->Show ();
 Win32::GUI::Dialog();

Re: [perl-win32-gui-users] LWP + Fork + Win32::GUI

[<Kev...@al...>]

Michael,

I did quite a bit of experimenting with Fork and Win32::GUI a while ago.
The main problem I hit was perl crashed when the window closed.  I guessed
there was some sort of memory management problem but couldn't figure out
what.  Eventually I gave up and used a doevents approach (I did try Tk but
this isn't thread safe so crashes as soon as a fork occurs).

If you're still interested in trying fork I've attached one of the scripts
I was playing with.  The fork routines are in a seperate module PipeFork.pm
which I've also included.

The parent handles the windows events, tells the child what events have
occured and the child performs the appropriate actions (in this case
calculating the size of subdirectories).

I'll be interested to hear if you have more success than I did.

Cheers,

Kev.

(See attached file: fork.zip)



|---------+------------------------------------------------>
|         |           "Michael Alaly" <mi...@fl...>       |
|         |           Sent by:                             |
|         |           per...@li...ur|
|         |           ceforge.net                          |
|         |                                                |
|         |                                                |
|         |           17/10/2002 15:37                     |
|         |                                                |
|---------+------------------------------------------------>
  >----------------------------------------------------------------------------------------------|
  |                                                                                              |
  |       To:       <per...@li...>                                 |
  |       cc:                                                                                    |
  |       Subject:  [perl-win32-gui-users] LWP + Fork + Win32::GUI                               |
  >----------------------------------------------------------------------------------------------|




Hello,

I don't know how to continue a thread that started before I joined the list
so I apologize in advance: "Is possible to modify LWP module in order to
avoid a frozen window ?"

I have spent the morning searching for some solutions involving LWP, Fork
and Win32::GUI. I saw in the archives for this list that some of this has
been discussed before and that one question I can answer had been asked by
"Guillem Cunillera Wefers <vacarisses@es...>".

Guillem if you are still interested in how to do this, you will want to use
the callback function in LWP and call the DoEvents() inside that callback.
You can set the number of bytes to read before calling the function. This
should allow you to use DoEvents liberally within any call to LWP.

I have some questions regarding your program if you could contact me
off-list I would apprecaite it. I am new to Win32::GUI and forking and am
trying to do something very similar to what it looked like you were trying
to do. I am attempting to take a list of links from a ListView and send
them
each to a child for download. I am running into lots of problems with fork
and page faults that I can't seem to solve.

Cheers,
Michael



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[perl-win32-gui-users] I'M BACK!!!

[Aldo C. <da...@pe...>]

hello people!

finally I'm back on this list (I had lost any hope it would
happen again :-).

to make a long story short, this is what happened:
1. at some point, SourceForge decided to refuse receiving
   mail from servers that didn't allow null sender (don't
   ask me why, it's some SMTP stuff that I don't grok).
2. my mail server was not allowing this, so I could not
   post anymore.
3. I also have a job email access, so I setup an address
   there just to be on this list.
4. at some point, my job's ISP decided to disallow null
   sender, so I was out with that address too :-(
5. some days ago, a friend of mine pointed me at a
   misconfiguration on my own mailserver (and I said:
   doh! :-)
6. I have fixed this and now everything rocks again!

this gives me new thrust to keep on developing Win32::GUI.
this, and the quantity of mail and messages (on IRC, PerlMonks,
etc.) of people that just love this module :-)

I will try to backlog the mailing list and reply to unanswered
questions, a new version is in development and will be out soon.

happy to be with you again,
Aldo

__END__
$_=q,just perl,,s, , another ,,s,$, hacker,,print;

[perl-win32-gui-users] LWP + Fork + Win32::GUI

[Michael A. <mi...@fl...>]

Hello,

I don't know how to continue a thread that started before I joined the list
so I apologize in advance: "Is possible to modify LWP module in order to
avoid a frozen window ?"

I have spent the morning searching for some solutions involving LWP, Fork
and Win32::GUI. I saw in the archives for this list that some of this has
been discussed before and that one question I can answer had been asked by
"Guillem Cunillera Wefers <vacarisses@es...>".

Guillem if you are still interested in how to do this, you will want to use
the callback function in LWP and call the DoEvents() inside that callback.
You can set the number of bytes to read before calling the function. This
should allow you to use DoEvents liberally within any call to LWP.

I have some questions regarding your program if you could contact me
off-list I would apprecaite it. I am new to Win32::GUI and forking and am
trying to do something very similar to what it looked like you were trying
to do. I am attempting to take a list of links from a ListView and send them
each to a child for download. I am running into lots of problems with fork
and page faults that I can't seem to solve.

Cheers,
Michael

RE: [perl-win32-gui-users] Minimized window inactive

[Motesicky A. <Alo...@sw...>]

Try this:
#-----------------------------------------
use strict;
use Win32::GUI;
my $count = 0;

my $W = new Win32::GUI::Window(
      -left   => 558,
      -top    => 122,
      -width  => 300,
      -height => 255,
      -name   => "W",
      -text   => "Test"
      );

$W->AddLabel(
       -text    => "$count",
       -name    => "count",
       -left    => 10,
       -top     => 10,
       -width   => 30,
       -height  => 13,
       -foreground    => 0,
      );

$W->AddButton(
       -text    => "start",
       -name    => "start",
       -left    => 126,
       -top     => 144,
       -width   => 42,
       -height  => 21,
       -foreground    => 0,
      );

$W->AddTimer("Timer1", 0);


$W->Timer1->Kill;
$W->Show();
Win32::GUI::Dialog();

sub start_Click {
    $W->Timer1->Interval(1000);
}

sub Timer1_Timer {
    $W->count->Text(++$count);
}
#-----------------------------------------

-----Original Message-----
From: carollyne courtney [mailto:car...@ho...]
Sent: Thursday, October 17, 2002 8:35 AM
To: per...@li...
Subject: [perl-win32-gui-users] Minimized window inactive


How do I ensure that the counter continues running when the window is
minimized?

Thanks

-snip-

use strict;
use Win32::GUI;
my $count = 0;

my $W = new Win32::GUI::Window(
      -left   => 558,
      -top    => 122,
      -width  => 300,
      -height => 255,
      -name   => "W",
      -text   => "Test"
      );

$W->AddLabel(
       -text    => "$count",
       -name    => "count",
       -left    => 10,
       -top     => 10,
       -width   => 30,
       -height  => 13,
       -foreground    => 0,
      );

$W->AddButton(
       -text    => "start",
       -name    => "start",
       -left    => 126,
       -top     => 144,
       -width   => 42,
       -height  => 21,
       -foreground    => 0,
      );

$W->Show();
Win32::GUI::Dialog();

sub start_Click {
  while (1) {
    Win32::GUI::DoEvents();
    sleep 1;
    $count++;
    $W->count->Text($count);
  }
}





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[perl-win32-gui-users] Minimized window inactive

[carollyne c. <car...@ho...>]

How do I ensure that the counter continues running when the window is 
minimized?

Thanks

-snip-

use strict;
use Win32::GUI;
my $count = 0;

my $W = new Win32::GUI::Window(
      -left   => 558,
      -top    => 122,
      -width  => 300,
      -height => 255,
      -name   => "W",
      -text   => "Test"
      );

$W->AddLabel(
       -text    => "$count",
       -name    => "count",
       -left    => 10,
       -top     => 10,
       -width   => 30,
       -height  => 13,
       -foreground    => 0,
      );

$W->AddButton(
       -text    => "start",
       -name    => "start",
       -left    => 126,
       -top     => 144,
       -width   => 42,
       -height  => 21,
       -foreground    => 0,
      );

$W->Show();
Win32::GUI::Dialog();

sub start_Click {
  while (1) {
    Win32::GUI::DoEvents();
    sleep 1;
    $count++;
    $W->count->Text($count);
  }
}





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[perl-win32-gui-users] Re: Win32::GUI or FindBin under Windows 95?

[Morbus I. <mo...@di...>]

 >>Or, on the other hand, anyone know of issues with FindBin? My previous
 >>working version was using simply "use lib ./lib", but the newest version
 >>(again, which works everywhere on Win98 and up) uses FindBin exclusively.
 >
 >FindBin is reputedly severly broken. Search PerlMonks for a post from tye.

Welp, I finally got some time to test it today under
VMWare, and I can point my finger to Win32::GUI:

  - installed fresh version of Win95B through VMWare.
  - installed the latest ActivePerl.
  - installed Win32::API and Win32::GUI through PPM
    (that gives me the .5xx Win32::GUI).
  - AmphetaDesk ran fine and as intended through Perl.
  - rebooted just for kicks.
  - downloaded Win32::GUI .6xx PPD from SourceForge.
  - ppm install Win32::GUI.
  - ran AmphetaDesk. HD churned for a good minute or so, then:

Can't load 'C:/Perl/site/lib/auto/Win32/GUI/GUI.dll' for module Win32::GUI: 
load_file:A device attached to the system is not functioning at 
C:/Perl/lib/DynaLoader.pm line 206.
Compilation failed in require at [snip]AmphetaDesk/OS/Windows.pm line 19.
BEGIN failed--compilation aborted [snip]/AmphetaDesk/OS/Windows.pm line 19.
Compilation failed in require at [snip] AmphetaDesk.pm line 111.

Those relevant files live in the CVS at 
http://www.sourceforge.net/projects/amphetadesk/

This basically leaves me with:

  - creating a new .exe/distribution specifically for
    Windows 95, with the old version of Win32::GUI.

  - checking for $VERSION within my Windows.pm so
    that I can set the font size properly depending
    on the Win32::GUI version.

Anything I'm missing? (I'm not ruling out further issues with FindBin
as of yet, but this is Patient Number 0 for "things to address").


-- 
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[perl-win32-gui-users] toolbar gui loft

[Magnone, A. <ang...@rb...>]

Has anyone had any success with creating a toolbar using The GUI LOFT and
then act upon the different
buttons clicked?  How can I tell which button has been clicked?


 <<...OLE_Obj...>>=20


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[perl-win32-gui-users] gui loft

[Magnone, A. <ang...@rb...>]

Has anyone had any success with creating a toolbar using The GUI LOFT and
then act upon the different
buttons clicked?  How can I tell which button has been clicked?

 <<...OLE_Obj...>>=20


------------------------------------------------------------
This e-mail may be privileged and/or confidential, and the sender does not waive any related rights and obligations. Any distribution, use or copying of this e-mail or the information it contains by other than an intended recipient is unauthorized. If you received this e-mail in error, please advise me (by return e-mail or otherwise) immediately.=20

Ce courriel est confidentiel et prot=E9g=E9. L'exp=E9diteur ne renonce pas aux droits et obligations qui s'y rapportent. Toute diffusion, utilisation ou copie de ce message ou des renseignements qu'il contient par une personne autre que le (les) destinataire(s) d=E9sign=E9(s) est interdite. Si vous recevez ce courriel par erreur, veuillez m'en aviser imm=E9diatement, par retour de courriel ou par un autre moyen.=20


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[perl-win32-gui-users] (no subject)

[Rodriguez, P. <Pet...@tr...>]

I do not have a 'C' compiler on the NT machine I need to run perl on. I =
downloaded the NT executables for 5.8 from cpan. Is there a similar =
distribution for the GUI interface?
Thanks

[perl-win32-gui-users] Re: Win32::GUI or FindBin under Windows 95?

[Johan L. <jo...@ba...>]

At 07:51 2002-10-16 -0400, Morbus Iff wrote:
>Or, on the other hand, anyone know of issues with FindBin? My previous
>working version was using simply "use lib ./lib", but the newest version
>(again, which works everywhere on Win98 and up) uses FindBin exclusively.

FindBin is reputedly severly broken. Search PerlMonks for a post from tye.


What is it that doesn't work?


In TGL, I do this:

#The directory this program is running from.
use File::Basename;
my $pathBase;

BEGIN {
         unshift(@INC, ".");

         $pathBase = dirname($0);
         unshift(@INC, $pathBase);
}

You could also do a chdir(dirname($0)) in a begin block I guess.


/J

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[perl-win32-gui-users] Win32::GUI or FindBin under Windows 95?

[Morbus I. <mo...@di...>]

Has anyone had any difficulty using Win32::GUI v0.665 under Windows 95? My
current code base works perfectly under Windows 98 and up, but nothing
seems to happen (double-click, hourglass for a second, no hourglass) under
95. I've yet to do adequate testing/debugging, but I know that the last
working Win95 version I had was using .502.

Or, on the other hand, anyone know of issues with FindBin? My previous
working version was using simply "use lib ./lib", but the newest version
(again, which works everywhere on Win98 and up) uses FindBin exclusively.

The sad thing is, my only Win95 box is an old laptop - 66mhz with 8 megs of
RAM. It takes me about 15 minutes to get one response out of my
application, and it's making debugging this thing a flippin' nightmare.

Thoughts?

-- 
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Tech: http://www.oreillynet.com/pub/au/779 - articles and weblog
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Re: [perl-win32-gui-users] AxWindow, WebBrowser and objects

[Luigino M. <lma...@ou...>]

You're great... ...Many thanks!!!

Bye.

    Luigino Masarati
    OutSys snc

----- Original Message -----
From: "Laurent ROCHER" <ro...@cl...>
To: <Per...@li...>
Sent: Tuesday, October 15, 2002 10:27 PM
Subject: Re: [perl-win32-gui-users] AxWindow, WebBrowser and objects


> Hi
>
>     Good news for you.
>
>     I have upload a new version of Win32::GUI::AxWindow.
>     This version add a new method GetOLE.
>     This method return a Win32::OLE object on the Hosted ActiveX control.
>
>     Now, you can host a webcontrol in a Win32::GUI window and control it
via
> Win32::OLE.
>     Win32::OLE is more powerfull for complex ActiveX.
>     I have add a sample with write directly in the WebControl.
>
>     See at : http://perso.club-internet.fr/rocherl/Win32GUI.html
>
> Laurent.
>
> ----- Original Message -----
>
> > Thanks,
> >     I think that I will use OLE this time (waiting for Laurent to add
> > IDispatch property support ;-) because I want to use the "HTML window"
> > simply as a nicely formatted log message display.
> >
> > Bye.
> >
> >     Luigino Masarati
> >     OutSys snc
>
>
>
>
> -------------------------------------------------------
> This sf.net email is sponsored by:ThinkGeek
> Welcome to geek heaven.
> http://thinkgeek.com/sf
> _______________________________________________
> Perl-Win32-GUI-Users mailing list
> Per...@li...
> https://lists.sourceforge.net/lists/listinfo/perl-win32-gui-users
>

Re: [perl-win32-gui-users] AxWindow, WebBrowser and objects

[Laurent R. <ro...@cl...>]

Hi

    Good news for you.

    I have upload a new version of Win32::GUI::AxWindow.
    This version add a new method GetOLE.
    This method return a Win32::OLE object on the Hosted ActiveX control.

    Now, you can host a webcontrol in a Win32::GUI window and control it via
Win32::OLE.
    Win32::OLE is more powerfull for complex ActiveX.
    I have add a sample with write directly in the WebControl.

    See at : http://perso.club-internet.fr/rocherl/Win32GUI.html

Laurent.

----- Original Message -----

> Thanks,
>     I think that I will use OLE this time (waiting for Laurent to add
> IDispatch property support ;-) because I want to use the "HTML window"
> simply as a nicely formatted log message display.
>
> Bye.
>
>     Luigino Masarati
>     OutSys snc

Re: [perl-win32-gui-users] AxWindow, WebBrowser and objects

[Luigino M. <lma...@ou...>]

Thanks,
    I think that I will use OLE this time (waiting for Laurent to add
IDispatch property support ;-) because I want to use the "HTML window"
simply as a nicely formatted log message display.

Bye.

    Luigino Masarati
    OutSys snc


----- Original Message -----
From: "Wasserman Henry" <hwa...@ya...>
To: <Per...@li...>
Sent: Friday, October 11, 2002 10:57 PM
Subject: Re: [perl-win32-gui-users] AxWindow, WebBrowser and objects


> You might be able to use Win32::OLE to get the browser
> COM object, which in turn will give you the DOM.
>
> Take a look at S.A.M.I.E - simple automated module for
> Internet Explorer on www.sourceforge.net
>
> - Henry
> --- Laurent ROCHER <ro...@cl...> wrote:
> > Hi,
> >
> >     Theoricly, i think you can have access to html
> > object hierarchy via
> > WebBrowser.Document property.
> > But actualy, AxWindow not work with IDispatch
> > property :(
> > I probably add it in a future release.
> >
> > Actual solution is to create/manage you HTML
> > document via perl and save it to a
> > tempory file. Then (re)load it, in a webbrowser.
> > Eventualy, you can use a DHTML Edit control for
> > directly load HTML wihtout file.
> >
> >
> > Laurent.
> >
> >
> > ----- Original Message -----
> > From: "Luigino Masarati"
> > Subject: [perl-win32-gui-users] AxWindow, WebBrowser
> > and objects
> >
> >
> > Hi,
> >     I'm planning to use AxWindow to host a
> > WebBrowser Activex control for
> > displaying dynamic text into a Win32::GUI
> > application and I have a problem:
> >
> > How can I access and update the
> > "Document.body.innerHTML" property in the
> > WebBrowser object I have created?
> > I found how to access properties, methods and events
> > in the AxWindow hosted
> > control but nothing about browsing the object
> > hierarchy itself.
> >
> > Am I missing anything?
> >
> > Thanks.
> >
> >     Luigino Masarati
> >     OutSys snc
> >
> >
> >
> >
> >
> -------------------------------------------------------
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> > Welcome to geek heaven.
> > http://thinkgeek.com/sf
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>
>
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[perl-win32-gui-users] TUTORIALS

[Ashok B. <as...@hd...>]

Where can I find good tutorials on WIN32::GUI
I would like to use this module but I don't know where to start from
Thanks in advance
Ashok

Re: [perl-win32-gui-users] AxWindow, WebBrowser and objects

[Wasserman H. <hwa...@ya...>]

You might be able to use Win32::OLE to get the browser
COM object, which in turn will give you the DOM.

Take a look at S.A.M.I.E - simple automated module for
Internet Explorer on www.sourceforge.net

- Henry
--- Laurent ROCHER <ro...@cl...> wrote:
> Hi,
> 
>     Theoricly, i think you can have access to html
> object hierarchy via
> WebBrowser.Document property.
> But actualy, AxWindow not work with IDispatch
> property :(
> I probably add it in a future release.
> 
> Actual solution is to create/manage you HTML
> document via perl and save it to a
> tempory file. Then (re)load it, in a webbrowser.
> Eventualy, you can use a DHTML Edit control for
> directly load HTML wihtout file.
> 
> 
> Laurent.
> 
> 
> ----- Original Message -----
> From: "Luigino Masarati"
> Subject: [perl-win32-gui-users] AxWindow, WebBrowser
> and objects
> 
> 
> Hi,
>     I'm planning to use AxWindow to host a
> WebBrowser Activex control for
> displaying dynamic text into a Win32::GUI
> application and I have a problem:
> 
> How can I access and update the
> "Document.body.innerHTML" property in the
> WebBrowser object I have created?
> I found how to access properties, methods and events
> in the AxWindow hosted
> control but nothing about browsing the object
> hierarchy itself.
> 
> Am I missing anything?
> 
> Thanks.
> 
>     Luigino Masarati
>     OutSys snc
> 
> 
> 
> 
>
-------------------------------------------------------
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> Welcome to geek heaven.
> http://thinkgeek.com/sf
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Re: [perl-win32-gui-users] AxWindow, WebBrowser and objects

[Laurent R. <ro...@cl...>]

Hi,

    Theoricly, i think you can have access to html object hierarchy via
WebBrowser.Document property.
But actualy, AxWindow not work with IDispatch property :(
I probably add it in a future release.

Actual solution is to create/manage you HTML document via perl and save it to a
tempory file. Then (re)load it, in a webbrowser.
Eventualy, you can use a DHTML Edit control for directly load HTML wihtout file.


Laurent.


----- Original Message -----
From: "Luigino Masarati"
Subject: [perl-win32-gui-users] AxWindow, WebBrowser and objects


Hi,
    I'm planning to use AxWindow to host a WebBrowser Activex control for
displaying dynamic text into a Win32::GUI application and I have a problem:

How can I access and update the "Document.body.innerHTML" property in the
WebBrowser object I have created?
I found how to access properties, methods and events in the AxWindow hosted
control but nothing about browsing the object hierarchy itself.

Am I missing anything?

Thanks.

    Luigino Masarati
    OutSys snc

[perl-win32-gui-users] AxWindow, WebBrowser and objects

[Luigino M. <lma...@ou...>]

Hi,
    I'm planning to use AxWindow to host a WebBrowser Activex control =
for displaying dynamic text into a Win32::GUI application and I have a =
problem:

How can I access and update the "Document.body.innerHTML" property in =
the WebBrowser object I have created?
I found how to access properties, methods and events in the AxWindow =
hosted control but nothing about browsing the object hierarchy itself.

Am I missing anything?

Thanks.

    Luigino Masarati
    OutSys snc

[perl-win32-gui-users] gui path

[Dr.Mala M. <ma...@in...>]

I am working in windows NT. I think there is a path setting problem. When I am 
giving the following command following error is coming.

D:\perl\Win32-GUI-0.0.558>perl try1.pl
Can't locate loadable object for module Win32::GUI in @INC (@INC contains: 
d:/perl/lib d:/pe
rl/site/lib .) at try1.pl line 1
Compilation failed in require at try1.pl line 1.
BEGIN failed--compilation aborted at try1.pl line 1.


Source code for try1.help is:
use Win32::GUI;
    $main = Win32::GUI::Window->new(
                -name   => 'Main',
                -width  => 100,
                -height => 100,
        );
    $main->AddLabel(-text => "Hello, world");
    $main->Show();
    Win32::GUI::Dialog();


    sub Main_Terminate {
        -1;
    }

[perl-win32-gui-users] Q: Catching non win32::gui events / hooking window procedure

[Iain R. <iai...@gp...>]

I have a small application which displays tabular data using a listview
control. I'd like to be able to respond to a user resizing a column but
couldn't see anything in the win32::gui documentation that helped. A bit
of digging suggests that there is an ItemChanged event that is triggered
however it doesn't seem to get passed through.

Q1. Is there another way to detect a user change in a column width?

Q2. Is it possible to write a window procedure in perl? (as with VB
subclassing)

Any suggestions or code snippets gratefully received.

Iain

p.s. The effect I want to achieve is a listview with 5 columns. The
first 4 can be resized by the user but the 5th (the one on the right)
should automagically expand to fill the remaining space to the edge of
the window.

Re: [perl-win32-gui-users] GetDC

[Johan L. <jo...@ba...>]

At 09:21 2002-10-10 -0400, Jonathan Southwick wrote:

>Where can I get information on how to use this?  I am able to draw lines 
>(axes and ticks for a graph) and I know how to plot individual points on 
>the "graph" but I am wondering if there is more?  (I don't mean circles 
>and boxes.)

http://216.26.168.92/vbapi/ref/funcc.html#devices

Look around. Look up stuff you already know.


>Can the DC object be cleared (other than placing another window over it 
>and removing the window)?

You can draw a filled rectangle that covers the entire area. Calling 
InvalidateRect() will also force the window to be repainted (see below).


>I still haven't figured out how to handle keep what I have drawn to the 
>object there when another window covers it.

Ok. Say you have a routine that draws the entire graph to a 
Win32::GUI::Graphics control (let's name it "gfxGraph). Let's call the sub 
drawGraph.

What you need to do is to call drawGraph() from within the Paint event 
handler, like so:

sub gfxGraph_Paint {
     drawGraph();
     return(1);
}

Now it should be repainted each time it needs to (like when it's uncovered 
by another window). Windows will take care of this by calling the event 
handler. You just need to do something useful there.


If you want to store the image in a bitmap (maybe for saving to disk):
http://perso.club-internet.fr/rocherl/DIBitmap.html
The newFromDC routine should do the trick.

(This could also be used to cache the image if it takes a long time to draw 
it from scratch each time)


>Johan Lindstrom posted some information but it went (making motion of flat 
>hand over head from front to back).

:)

I hope the description above was a little more down to Earth. If not, 
please let me know where the confusion begins.


/J

-------- ------ ---- --- -- --  --  -    -     -      -         -
Johan Lindström    Sourcerer @ Boss Casinos     jo...@ba...

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