File:
[LON-CAPA] /
loncom /
homework /
imagechoice.pm
Revision
1.17:
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Mon May 11 16:51:22 2009 UTC (15 years, 4 months ago) by
bisitz
Branches:
MAIN
CVS tags:
version_2_9_X,
version_2_9_99_0,
version_2_9_1,
version_2_9_0,
version_2_8_99_1,
version_2_8_99_0,
version_2_11_0_RC2,
version_2_11_0_RC1,
version_2_10_X,
version_2_10_1,
version_2_10_0_RC2,
version_2_10_0_RC1,
version_2_10_0,
loncapaMITrelate_1,
language_hyphenation_merge,
language_hyphenation,
bz6209-base,
bz6209,
bz5969,
bz2851,
PRINT_INCOMPLETE_base,
PRINT_INCOMPLETE,
HEAD,
GCI_3,
GCI_2,
BZ5971-printing-apage,
BZ5434-fox,
BZ4492-merge,
BZ4492-feature_horizontal_radioresponse,
BZ4492-feature_Support_horizontal_radioresponse,
BZ4492-Support_horizontal_radioresponse
XHTML: Attributes in lower-case only (<form method="post" ...)
1: # $Id: imagechoice.pm,v 1.17 2009/05/11 16:51:22 bisitz Exp $
2: #
3: # Copyright Michigan State University Board of Trustees
4: #
5: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
6: #
7: # LON-CAPA is free software; you can redistribute it and/or modify
8: # it under the terms of the GNU General Public License as published by
9: # the Free Software Foundation; either version 2 of the License, or
10: # (at your option) any later version.
11: #
12: # LON-CAPA is distributed in the hope that it will be useful,
13: # but WITHOUT ANY WARRANTY; without even the implied warranty of
14: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: # GNU General Public License for more details.
16: #
17: # You should have received a copy of the GNU General Public License
18: # along with LON-CAPA; if not, write to the Free Software
19: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20: #
21: # /home/httpd/cgi-bin/plot.gif
22: #
23: # http://www.lon-capa.org/
24: #
25: package Apache::imagechoice;
26: use strict;
27: use Apache::Constants qw(:common :http);
28: use Apache::lonnet;
29: use Apache::lonlocal;
30: use LONCAPA;
31:
32:
33: sub deletedata {
34: my ($id)=@_;
35: &Apache::lonnet::delenv('imagechoice.'.$id.'.coords');
36: }
37:
38: sub closewindow {
39: my ($r,$output,$filename,$needimage,$display)=@_;
40: if ($needimage) {
41: $needimage="<img name=\"pickimg\" src=\"$filename\" />";
42: }
43: my $js=<<"ENDSUBM";
44: <script type="text/javascript">
45: function submitthis() {
46: $output
47: self.close();
48: }
49: </script>
50: ENDSUBM
51:
52: my $start_page =
53: &Apache::loncommon::start_page('Close Window',$js,
54: {'bgcolor' => '#FFFFFF',
55: 'only_body' => 1,
56: 'add_entries' => {
57: onload => 'submitthis();'},});
58:
59: my $end_page =
60: &Apache::loncommon::end_page();
61:
62: $r->print(<<"ENDSUBM");
63: $start_page
64: <h3>Position Selected</h3>
65: $display
66: $needimage
67: $end_page
68: ENDSUBM
69: }
70:
71: sub storedata {
72: my ($r,$type,$filename,$id)=@_;
73:
74: my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
75:
76: my ($output,$needimage);
77:
78: if ($env{"imagechoice.$id.formwidth"}) {
79: $output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formwidth"}.'.value=document.pickimg.width;';
80: $needimage=1;
81: }
82: if ($env{"imagechoice.$id.formheight"}) {
83: $output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formheight"}.'.value=document.pickimg.height;';
84: $needimage=1;
85: }
86:
87: my $display;
88: if ($type eq 'point') {
89: my (undef,$x,$y)=split(':',$env{"imagechoice.$id.coords"});
90: if ($env{"imagechoice.$id.formx"}) {
91: $output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formx"}.'.value='.$x.';';
92: $display.="<p>The X coordinate is $x</p>\n";
93: }
94: if ($env{"imagechoice.$id.formy"}) {
95: $output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formy"}.'.value='.$y.';';
96: $display.="<p>The Y coordinate is $y</p>\n";
97: }
98: } elsif ($type eq 'polygon' or $type eq 'box') {
99: my $coordstr;
100: while (@coords) {
101: $coordstr.='('.shift(@coords).','.shift(@coords).')-';
102: }
103: chop($coordstr);
104: $display.="<p>The selected coordinates are <tt>$coordstr</tt></p>\n";
105: $output.='opener.document.forms.'.$env{"imagechoice.$id.formname"}.'.'.$env{"imagechoice.$id.formcoord"}.'.value="'.$coordstr.'";';
106: }
107: if ($display) {
108: $display.="<p>If this window fails to close you may need to manually replace the old coordinates with the above value.</p>\n";
109: }
110: &deletedata($id);
111: &closewindow($r,$output,$filename,$needimage,$display);
112: }
113:
114: sub getcoord {
115: my ($r,$type,$filename,$id)=@_;
116: my $heading=&mt('Select Position on Image');
117: my $nextstage='';
118: if ($type eq 'box') {
119: my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
120: my $step=scalar(@coords)/2;
121: if ($step == 0) {
122: $heading=&mt('Select First Coordinate on Image');
123: #$nextstage='<input type="hidden" name="type" value="pairtwo" />';
124: } elsif ($step == 1) {
125: $heading=&mt('Select Second Coordinate on Image');
126: #$nextstage='<input type="hidden" name="type" value="pairthree" />';
127: } else {
128: $heading=&mt('Select Finish to save selection');
129: $nextstage='<input type="submit" name="finish" value="'.&mt('Finish').'" />';
130: }
131: } elsif ($type eq 'polygon') {
132: $heading=&mt('Enter Coordinate or click finish to close Polygon');
133: $nextstage='<input type="submit" name="finish" value="'.&mt('Finish').'" />';
134: } elsif ($type eq 'point') {
135: $heading=&mt('Click to select a Coordinate or click Finish to save current selection');
136: $nextstage='<input type="submit" name="finish" value="'.&mt('Finish').'" />';
137: }
138:
139: my $start_page =
140: &Apache::loncommon::start_page('Get Coordinates',undef,
141: {'bgcolor' => '#FFFFFF',
142: 'only_body' => 1,});
143:
144: my $end_page =
145: &Apache::loncommon::end_page();
146: my $canceltext=&mt('Cancel');
147: $r->print(<<"END");
148: $start_page
149: <h3>$heading</h3>
150: <form method="post" action="/adm/imagechoice?token=$id">
151: $nextstage
152: <input type="submit" name="cancel" value="$canceltext" />
153: <br />
154: <input name="image" type="image" src="$filename" />
155: </form>
156: $end_page
157: END
158: }
159:
160: sub savecoord {
161: my ($id,$type)=@_;
162: if (defined($env{"form.image.x"}) && defined($env{"form.image.y"})) {
163: my $data;
164: if ($type eq 'point') {
165: $data=join(':',(undef,$env{"form.image.x"},$env{"form.image.y"}));
166: } else {
167: $data=join(':',($env{"imagechoice.$id.coords"},
168: $env{"form.image.x"},$env{"form.image.y"}));
169: }
170: &Apache::lonnet::appenv({"imagechoice.$id.coords"=>$data});
171: }
172: return int(scalar(split(':',$env{"imagechoice.$id.coords"}))/2);
173: }
174:
175: sub add_obj {
176: my ($x,$id,$type,$args,$extra)=@_;
177:
178: $$x{"cgi.$id.OBJTYPE"}.=$type.':';
179: my $i=$$x{"cgi.$id.OBJCOUNT"}++;
180: $$x{"cgi.$id.OBJ$i"}=$args;
181: if (defined($extra)) { $$x{"cgi.$id.OBJEXTRA$i"}=$extra; }
182: }
183:
184: sub drawX {
185: my ($data,$imid,$x,$y)=@_;
186: my $length = 6;
187: my $width = 1;
188: my $extrawidth = 2;
189: &add_obj($data,$imid,'LINE',
190: join(':',(($x-$length),($y-$length),($x+$length),($y+$length),
191: "FFFFFF",($width+$extrawidth))));
192: &add_obj($data,$imid,'LINE',
193: join(':',(($x-$length),($y+$length),($x+$length),($y-$length),
194: "FFFFFF",($width+$extrawidth))));
195: &add_obj($data,$imid,'LINE',
196: join(':',(($x-$length),($y-$length),($x+$length),($y+$length),
197: "FF0000",($width))));
198: &add_obj($data,$imid,'LINE',
199: join(':',(($x-$length),($y+$length),($x+$length),($y-$length),
200: "FF0000",($width))));
201: }
202:
203: sub drawPolygon {
204: my ($data,$id,$imid)=@_;
205: my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
206: my $coordstr;
207: while (@coords) {
208: $coordstr.='('.shift(@coords).','.shift(@coords).')-';
209: }
210: chop($coordstr);
211: my $width = 1;
212: my $extrawidth = 2;
213: &add_obj($data,$imid,'POLYGON',
214: join(':',("FFFFFF",($width+$extrawidth)),'1'),$coordstr);
215: &add_obj($data,$imid,'POLYGON',
216: join(':',("00FF00",($width)),'1'),$coordstr);
217: }
218:
219: sub drawBox {
220: my ($data,$id,$imid)=@_;
221: my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
222: if (scalar(@coords) < 4) { return ''; }
223: my $width = 1;
224: my $extrawidth = 2;
225: &add_obj($data,$imid,'RECTANGLE',
226: join(':',(@coords,"FFFFFF",($width+$extrawidth))));
227: &add_obj($data,$imid,'RECTANGLE',join(':',(@coords,"00FF00",$width)));
228: }
229:
230: sub drawimage {
231: my ($r,$type,$filename,$id)=@_;
232: my $imid=&Apache::loncommon::get_cgi_id();
233: my (undef,@coords)=split(':',$env{"imagechoice.$id.coords"});
234: if (scalar(@coords) < 2) { return &Apache::lonnet::hreflocation('',$filename); }
235: my %data;
236: $data{"cgi.$imid.BGIMG"}=$filename;
237: my $x=$coords[-2];
238: my $y=$coords[-1];
239: &drawX(\%data,$imid,$x,$y);
240: if ($type eq "polygon") { &drawPolygon(\%data,$id,$imid); }
241: if ($type eq "box") { &drawBox(\%data,$id,$imid); }
242: &Apache::lonnet::appenv(\%data);
243: return "/adm/randomlabel.png?token=$imid"
244: }
245:
246: sub handler {
247: my ($r)=@_;
248: &Apache::loncommon::content_type($r,'text/html');
249: $r->send_http_header;
250: my %data;
251: my (undef,$id) = split(/=/,$ENV{'QUERY_STRING'});
252: my $filename = &unescape($env{"imagechoice.$id.file"});
253: my $formname = $env{"imagechoice.$id.formname"};
254: if ($env{'form.cancel'} eq &mt('Cancel')) {
255: &deletedata($id);
256: &closewindow($r,'',$filename);
257: return OK;
258: }
259: my $type=$env{"imagechoice.$id.type"};
260: if (defined($env{'form.type'})) { $type=$env{'form.type'}; }
261: my $numcoords=&savecoord($id,$type);
262: my $imurl=&drawimage($r,$type,$filename,$id);
263: if ($env{'form.finish'} eq &mt('Finish')) {
264: &storedata($r,$type,$imurl,$id);
265: } else {
266: &getcoord($r,$type,$imurl,$id);
267: }
268: return OK;
269: }
270:
271: 1;
272:
273: __END__
274:
275:
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