OS2::Focus - Perl extension to get and set focus on PM windows.

OS2-Focus documentation Contained in the OS2-Focus distribution.

Index

Code Index:

NAME

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OS2::Focus - Perl extension to get and set focus on PM windows.

SYNOPSIS

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  use OS2::Focus ':short';
  $old_focus = QueryFocus;
  ...				# Say, create some Tk windows...
  SetFocus($old_focus) or warn "Cannot change focus, the error is $^E.\n".

DESCRIPTION

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EXPORT

None by default.

Exportable constants

HWND_DESKTOP is exported with a tag :win.

Exportable functions

See PMREF documentation for the following functions:

  BOOL WinFocusChange (HWND hwndDesktop, HWND hwndSetFocus, ULONG flFocusChange)
  HWND WinQueryFocus (HWND hwndDesktop)
  BOOL WinSetFocus (HWND hwndDesktop, HWND hwndSetFocus)

which are exported with a tag :win. Use HWND_DESKTOP (exported with the same tag) as the first argument for these functions.

Prefix Win can be removed, the resulted functions omit the first argument, and fill $! and $^E on error. These functions are exported with a tag :short.

AUTHOR

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Ilya Zakharevich, ilya@math.ohio-state.edu.

SEE ALSO

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perl(1).

OS2-Focus documentation Contained in the OS2-Focus distribution. 
package OS2::Focus;

use strict;
use Carp;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $AUTOLOAD);

require Exporter;
require DynaLoader;
use AutoLoader;

@ISA = qw(Exporter DynaLoader);

# Items to export into callers namespace by default. Note: do not export
# names by default without a very good reason. Use EXPORT_OK instead.
# Do not simply export all your public functions/methods/constants.

# This allows declaration	use OS2::Focus ':all';
# If you do not need this, moving things directly into @EXPORT or @EXPORT_OK
# will save memory.
%EXPORT_TAGS = ( 'short' => [ qw(
	FocusChange
	QueryFocus
	SetFocus
) ] ,	'win' => [ qw(
	HWND_DESKTOP
	WinFocusChange
	WinQueryFocus
	WinSetFocus
) ] );

@EXPORT_OK = ( @{ $EXPORT_TAGS{'short'} }, @{ $EXPORT_TAGS{'win'} },  );

@EXPORT = (

);
$VERSION = '0.01';

sub AUTOLOAD {
    # This AUTOLOAD is used to 'autoload' constants from the constant()
    # XS function.  If a constant is not found then control is passed
    # to the AUTOLOAD in AutoLoader.

    my $constname;
    ($constname = $AUTOLOAD) =~ s/.*:://;
    croak "& not defined" if $constname eq 'constant';
    my $val = constant($constname, @_ ? $_[0] : 0);
    if ($! != 0) {
	if ($! =~ /Invalid/ || $!{EINVAL}) {
	    $AutoLoader::AUTOLOAD = $AUTOLOAD;
	    goto &AutoLoader::AUTOLOAD;
	}
	else {
		croak "Your vendor has not defined OS2::Focus macro $constname";
	}
    }
    {  no strict 'refs';
       # Next line doesn't help with older Perls; in newers: no such warnings
       # local $^W = 0;		# Prototype mismatch: sub XXX vs ()
       if ($] >= 5.00561) {	# Fixed between 5.005_53 and 5.005_61
	 *$AUTOLOAD = sub () { $val };
       } else {
	 *$AUTOLOAD = sub { $val };
       }
    }
    goto &$AUTOLOAD;
}

bootstrap OS2::Focus $VERSION;

# Preloaded methods go here.

# Autoload methods go after =cut, and are processed by the autosplit program.

1;
__END__
# Below is the stub of documentation for your module. You better edit it!