File:
[LON-CAPA] /
loncom /
homework /
imagechoice.pm
Revision
1.18:
download - view:
text,
annotated -
select for diffs
Fri Feb 14 17:01:30 2014 UTC (10 years, 9 months ago) by
bisitz
Branches:
MAIN
CVS tags:
version_2_12_X,
version_2_11_X,
version_2_11_5_msu,
version_2_11_5,
version_2_11_4_uiuc,
version_2_11_4_msu,
version_2_11_4,
version_2_11_3_uiuc,
version_2_11_3_msu,
version_2_11_3,
version_2_11_2_uiuc,
version_2_11_2_msu,
version_2_11_2_educog,
version_2_11_2,
version_2_11_1,
version_2_11_0_RC3,
version_2_11_0,
HEAD
- Internationalization:
- Added missing &mt() calls
- More flexible usage of button texts / re-use existing phrases
- Standard... headline, size, button texts, styles
- Improved wording; punctuation
- Mechanism which button was clicked more robust now
# $Id: imagechoice.pm,v 1.18 2014/02/14 17:01:30 bisitz 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/
#
package Apache::imagechoice;
use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet;
use Apache::lonlocal;
use LONCAPA;
sub deletedata {
my ($id)=@_;
&Apache::lonnet::delenv('imagechoice.'.$id.'.coords');
}
sub closewindow {
my ($r,$output,$filename,$needimage,$display)=@_;
if ($needimage) {
$needimage="<img name=\"pickimg\" src=\"$filename\" />";
}
my $js=<<"ENDSUBM";
<script type="text/javascript">
function submitthis() {
$output
self.close();
}
</script>
ENDSUBM
my $start_page =
&Apache::loncommon::start_page('Close Window',$js,
{'bgcolor' => '#FFFFFF',
'only_body' => 1,
'add_entries' => {
onload => 'submitthis();'},});
my $end_page =
&Apache::loncommon::end_page();
$r->print(
$start_page
.'<h1>'.&mt('Position Selected').'</h1>'
.$display
.$needimage
.$end_page);
}
sub storedata {
my ($r,$type,$filename,$id)=@_;
my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
my ($output,$needimage);
if ($env{"imagechoice.$id.formwidth"}) {
$output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formwidth"}.'.value=document.pickimg.width;';
$needimage=1;
}
if ($env{"imagechoice.$id.formheight"}) {
$output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formheight"}.'.value=document.pickimg.height;';
$needimage=1;
}
my $display;
if ($type eq 'point') {
my (undef,$x,$y)=split(':',$env{"imagechoice.$id.coords"});
if ($env{"imagechoice.$id.formx"}) {
$output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formx"}.'.value='.$x.';';
$display.='<p>'.&mt('The X coordinate is [_1]',$x)."</p>\n";
}
if ($env{"imagechoice.$id.formy"}) {
$output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formy"}.'.value='.$y.';';
$display.='<p>'.&mt('The Y coordinate is [_1]',$y)."</p>\n";
}
} elsif ($type eq 'polygon' or $type eq 'box') {
my $coordstr;
while (@coords) {
$coordstr.='('.shift(@coords).','.shift(@coords).')-';
}
chop($coordstr);
$display.='<p>'.&mt('The selected coordinates are [_1]',"<tt>$coordstr</tt>")."</p>\n";
$output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formcoord"}.'.value="'.$coordstr.'";';
}
if ($display) {
$display.='<p class="LC_info">'
.&mt('If this window fails to close you may need to manually replace the old coordinates with the above value.')
."</p>\n";
}
&deletedata($id);
&closewindow($r,$output,$filename,$needimage,$display);
}
sub getcoord {
my ($r,$type,$filename,$id)=@_;
my $heading=&mt('Select Position on Image');
my $nextstage='';
if ($type eq 'box') {
my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
my $step=scalar(@coords)/2;
if ($step == 0) {
$heading=&mt('Select First Coordinate on Image.');
#$nextstage='<input type="hidden" name="type" value="pairtwo" />';
} elsif ($step == 1) {
$heading=&mt('Select Second Coordinate on Image.');
#$nextstage='<input type="hidden" name="type" value="pairthree" />';
} else {
$heading=&mt('Select [_1] to save selection.','"'.&mt('Save').'"');
$nextstage='<input type="submit" name="finish" value="'.&mt('Save').'" />';
}
} elsif ($type eq 'polygon') {
$heading=&mt('Click to select a Coordinate or click [_1] to close Polygon.',
'"'.&mt('Save').'"');
$nextstage='<input type="submit" name="finish" value="'.&mt('Save').'" />';
} elsif ($type eq 'point') {
$heading=&mt('Click to select a Coordinate or click [_1] to save current selection.',
'"'.&mt('Save').'"');
$nextstage='<input type="submit" name="finish" value="'.&mt('Save').'" />';
}
my $headline = 'Get Coordinates';
my $start_page =
&Apache::loncommon::start_page($headline,undef,
{'bgcolor' => '#FFFFFF',
'only_body' => 1,});
my $end_page =
&Apache::loncommon::end_page();
$headline = &mt($headline);
my $canceltext=&mt('Cancel');
$r->print(<<"END");
$start_page
<h1>$headline</h1>
<p>$heading</p>
<form method="post" action="/adm/imagechoice?token=$id">
$nextstage
<input type="submit" name="cancel" value="$canceltext" />
<br />
<input name="image" type="image" src="$filename" />
</form>
$end_page
END
}
sub savecoord {
my ($id,$type)=@_;
if (defined($env{"form.image.x"}) && defined($env{"form.image.y"})) {
my $data;
if ($type eq 'point') {
$data=join(':',(undef,$env{"form.image.x"},$env{"form.image.y"}));
} else {
$data=join(':',($env{"imagechoice.$id.coords"},
$env{"form.image.x"},$env{"form.image.y"}));
}
&Apache::lonnet::appenv({"imagechoice.$id.coords"=>$data});
}
return int(scalar(split(':',$env{"imagechoice.$id.coords"}))/2);
}
sub add_obj {
my ($x,$id,$type,$args,$extra)=@_;
$$x{"cgi.$id.OBJTYPE"}.=$type.':';
my $i=$$x{"cgi.$id.OBJCOUNT"}++;
$$x{"cgi.$id.OBJ$i"}=$args;
if (defined($extra)) { $$x{"cgi.$id.OBJEXTRA$i"}=$extra; }
}
sub drawX {
my ($data,$imid,$x,$y)=@_;
my $length = 6;
my $width = 1;
my $extrawidth = 2;
&add_obj($data,$imid,'LINE',
join(':',(($x-$length),($y-$length),($x+$length),($y+$length),
"FFFFFF",($width+$extrawidth))));
&add_obj($data,$imid,'LINE',
join(':',(($x-$length),($y+$length),($x+$length),($y-$length),
"FFFFFF",($width+$extrawidth))));
&add_obj($data,$imid,'LINE',
join(':',(($x-$length),($y-$length),($x+$length),($y+$length),
"FF0000",($width))));
&add_obj($data,$imid,'LINE',
join(':',(($x-$length),($y+$length),($x+$length),($y-$length),
"FF0000",($width))));
}
sub drawPolygon {
my ($data,$id,$imid)=@_;
my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
my $coordstr;
while (@coords) {
$coordstr.='('.shift(@coords).','.shift(@coords).')-';
}
chop($coordstr);
my $width = 1;
my $extrawidth = 2;
&add_obj($data,$imid,'POLYGON',
join(':',("FFFFFF",($width+$extrawidth)),'1'),$coordstr);
&add_obj($data,$imid,'POLYGON',
join(':',("00FF00",($width)),'1'),$coordstr);
}
sub drawBox {
my ($data,$id,$imid)=@_;
my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
if (scalar(@coords) < 4) { return ''; }
my $width = 1;
my $extrawidth = 2;
&add_obj($data,$imid,'RECTANGLE',
join(':',(@coords,"FFFFFF",($width+$extrawidth))));
&add_obj($data,$imid,'RECTANGLE',join(':',(@coords,"00FF00",$width)));
}
sub drawimage {
my ($r,$type,$filename,$id)=@_;
my $imid=&Apache::loncommon::get_cgi_id();
my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
if (scalar(@coords) < 2) { return &Apache::lonnet::hreflocation('',$filename); }
my %data;
$data{"cgi.$imid.BGIMG"}=$filename;
my $x=$coords[-2];
my $y=$coords[-1];
&drawX(\%data,$imid,$x,$y);
if ($type eq "polygon") { &drawPolygon(\%data,$id,$imid); }
if ($type eq "box") { &drawBox(\%data,$id,$imid); }
&Apache::lonnet::appenv(\%data);
return "/adm/randomlabel.png?token=$imid"
}
sub handler {
my ($r)=@_;
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
my %data;
my (undef,$id) = split(/=/,$ENV{'QUERY_STRING'});
my $filename = &unescape($env{"imagechoice.$id.file"});
my $formname = $env{"imagechoice.$id.formname"};
if ($env{'form.cancel'}) { # eq &mt('Cancel')) {
&deletedata($id);
&closewindow($r,'',$filename);
return OK;
}
my $type=$env{"imagechoice.$id.type"};
if (defined($env{'form.type'})) { $type=$env{'form.type'}; }
my $numcoords=&savecoord($id,$type);
my $imurl=&drawimage($r,$type,$filename,$id);
if ($env{'form.finish'}) { # eq &mt('Save')) {
&storedata($r,$type,$imurl,$id);
} else {
&getcoord($r,$type,$imurl,$id);
}
return OK;
}
1;
__END__
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