#!/usr/bin/perl
#
# $Id: imagechoice.pl,v 1.4 2003/05/10 22:59:04 www Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/cgi-bin/plot.gif
#
# http://www.lon-capa.org/
#
use strict;
$|=1;
my %data;
foreach (split/&/,$ENV{'QUERY_STRING'}) {
my ($name,$value)=split/=/;
$data{$name}=$value;
}
my $filename = $data{'file'};
my $formname = $data{'formname'};
my $formx = $data{'formx'};
my $formy = $data{'formy'};
my $mode=$data{'mode'};
my $formwidth = $data{'formwidth'};
my $formheight = $data{'formheight'};
my $formcoord=$data{'formcoord'};
# unescape filename
$filename =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
#
# Single coordinate, defined - store it
#
if ((defined($data{'x'})) && (defined($data{'y'})) &&
($mode ne 'pairtwo') && ($mode ne 'pairthree')) {
my $output='';
if ($data{'formwidth'}) {
$output.='opener.document.forms.'.$data{'formname'}.'.'.$data{'formwidth'}.
'.value=document.pickimg.width;';
}
if ($data{'formheight'}) {
$output.='opener.document.forms.'.$data{'formname'}.'.'.$data{'formheight'}.
'.value=document.pickimg.height;';
}
if ($data{'formx'}) {
$output.='opener.document.forms.'.$data{'formname'}.'.'.$data{'formx'}.
'.value='.$data{'x'}.';';
}
if ($data{'formy'}) {
$output.='opener.document.forms.'.$data{'formname'}.'.'.$data{'formy'}.
'.value='.$data{'y'}.';';
}
print <<"ENDSUBM";
Content-type: text/html
Position Selected
ENDSUBM
#
# Coordinate Pair, Second Coordinate
#
} elsif ($mode eq 'pairthree') {
my $output='';
my $outputpair="($data{'selx'},$data{'sely'})-($data{'x'},$data{'y'})";
if ($data{'formwidth'}) {
$output.='opener.document.forms.'.$data{'formname'}.'.'.$data{'formwidth'}.
'.value=document.pickimg.width;';
}
if ($data{'formheight'}) {
$output.='opener.document.forms.'.$data{'formname'}.'.'.$data{'formheight'}.
'.value=document.pickimg.height;';
}
if ($data{'formcoord'}) {
$output.='opener.document.forms.'.$data{'formname'}.'.'.$data{'formcoord'}.
'.value="'.$outputpair.'";';
}
print <<"ENDCOORDSUB";
Content-type: text/html
Coordinates Selected
ENDCOORDSUB
#
# First and second call
#
} else {
my $heading='Position';
my $nextstage='';
if ($mode eq 'pair') {
$heading='First Coordinate';
$nextstage='';
} elsif ($mode eq 'pairtwo') {
$heading='Second Coordinate';
$nextstage=<
ENDNEXTSTAGE
}
print <<"END";
Content-type: text/html