NAME

Tk::WaitBox - An Object Oriented Wait Dialog for Perl/Tk, of the Please Wait variety.

DESCRIPTION

A WaitBox consists of a number of subwidgets:

bitmap

A bitmap (configurable via the -bitmap command, the default is an hourglass) on the left side of the WaitBox

label

A label (configurable via the -txt1 command), with text in the upper portion of the right hand frame

secondary label

Another label (configurable via the -txt2 command, the default is 'Please Wait'), with text in the lower portion of the right hand frame

userframe

A frame displayed, if required, between the label and the secondary label. For details, see the example code and the Advertised Widget section

cancel button

If a cancelroutine (configured via the -cancelroutine command) is defined, a frame will be packed below the labels and bitmap, with a single button. The text of the button will be 'Cancel' (configurable via the -canceltext command), and the button will call the supplied subroutine when pressed.

SYNOPSIS

Usage Description

Basic Usage

To use, create your WaitDialog objects during initialization, or at least before a Show. When you wish to display the WaitDialog object, invoke the 'Show' method on the WaitDialog object; when you wish to cease displaying the WaitDialog object, invoke the 'unShow' method on the object.

Configuration

Configuration may be done at creation or via the configure method.

Example Code

•  #!/usr/local/bin/perl -w 
  
   use Tk;
   use Tk::WaitBox;
   use strict;
  
   my($root) = MainWindow->new;
   my($utxt) = "Initializing...";
  
   my($wd) = $root->WaitBox(
  	-bitmap =>'questhead', # Default would be 'hourglass'
  	-txt2 => 'tick-tick-tick', #default would be 'Please Wait'
  	-title => 'Takes forever to get service around here',
  	-cancelroutine => sub {
  	    print "\nI'm canceling....\n";
  	    $wd->unShow;
  	    $utxt = undef;
  	});
   $wd->configure(-txt1 => "Hurry up and Wait, my Drill Sergeant told me");
   $wd->configure(-foreground => 'blue',-background => 'white');
  
   ### Do something quite boring with the user frame
   my($u) = $wd->{SubWidget}(uframe);
   $u->pack(-expand => 1, -fill => 'both');
   $u->Label(-textvariable => \$utxt)->pack(-expand => 1, -fill => 'both');
  
   ## It would definitely be better to do this with a canvas... this is dumb
   my($base) = $u->Frame(-background =>'gray',
  		       -relief => 'sunken',
  		       -borderwidth => 2,
  		       -height => 20)
  	 ->pack(-side => 'left', -anchor => 'w',-expand => 1,
  		-fill => 'both');
   my($bar) = $base->Frame(-borderwidth => 2,
  			 -relief => 'raised', -height => 20,
  			 -width => 0, -background => 'blue')
  	 ->pack(-fill => 'y', -side => 'left');
  
   $wd->configure(-canceltext => 'Halt, Cease, Desist'); # default is 'Cancel'
  
   $wd->Show;
  
   for (1..15) {
       sleep(1);
       $bar->configure(-width => int($_/15*$base->Width));
       $utxt = 100*$_/15 . "% Complete";
       $root->update;
       last if !defined($utxt);
   }
  
   $wd->unShow;

Advertised Subwidgets

uframe

uframe is a frame created between the two messages. It may be used for anything the user has in mind... including exciting cycle wasting displays of sand dropping through an hour glass, Zippy riding either a Gnu or a bronc, et cetera.

Assuming that the WaitBox is referenced by $w, the uframe may be addressed as $w->subwidget{'uframe'}. Having gotten the address, you can do anything (I think) you would like with it

Author

Brent B. Powers, Merrill Lynch (B2Pi) powers@ml.com

This code may be distributed under the same conditions as perl itself.