Re: [perl-win32-gui-users] disabling the check on a checkbox???

[Roode, E. <er...@ba...>]

For what it's worth, I have always been unclear on what the Win32::GUI
doco means by "the event is not passed to the default event processor".
Any clarification, anywhere, would be useful.=20


Eric

-----Original Message-----
From: per...@li...
[mailto:per...@li...] On Behalf Of
Glenn W Munroe
Sent: Tuesday, April 24, 2007 2:27 PM
To: 'Glenn Linderman'; 'GUI'
Subject: Re: [perl-win32-gui-users] disabling the check on a checkbox???

Glenn,

I wouldn't expect it to prevent it from being checked. Do you expect
this behaviour from the Windows control itself or from Win32::GUI?
Certain actions for some controls have a "pre-change" notification (e.g.
the TCN_SELCHANGING notification sent when a tab is *about* to change),
which can be used to prevent the change, but I don't see anything like
that on MSDN for a checkbox.

Or do you expect this from Win32::GUI? I know a return value of 0
prevents the "default action" from taking place, but I see that as a
"post-change"
action, if that makes sense. (I'm not sure where that action is
defined).=20

Or am I missing your point entirely?

Glenn2

> -----Original Message-----
> From: per...@li... [mailto:perl-

> win...@li...] On Behalf Of Glenn=20
> Linderman
> Sent: 24 April 2007 13:39
> To: GUI
> Subject: [perl-win32-gui-users] disabling the check on a checkbox???
>=20
> use strict;
> use warnings;
>=20
> use Win32::GUI();
>=20
> my $mw;
>=20
> $mw =3D new Win32::GUI::Window(
>     -name         =3D> "mw",
>     -title        =3D> "Checkbox default action",
>     -pos          =3D> [100, 100],
>     -size         =3D> [200, 200],
>     -dialogui     =3D> 1,
> );
>=20
> $mw->AddCheckbox(
>       -name   =3D> "cb",
>       -text   =3D> 'click me',
>       -pos    =3D> [10, 20],
>       -tabstop  =3D> 1,
>       -onClick =3D> sub { return 0; },
> );
>=20
>=20
> $mw->Show();
> Win32::GUI::Dialog();
>=20
>=20
> Why does the above program allow the checkbox to be checked and=20
> unchecked?  Why doesn't the -onClick handler, which returns 0, prevent

> the box from being checked?
>=20
> --
> Glenn -- http://nevcal.com/
> =
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D
> A protocol is complete when there is nothing left to remove.
> -- Stuart Cheshire, Apple Computer, regarding Zero Configuration=20
> Networking
>=20
>=20
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