Annotation of loncom/interface/lonquickgrades.pm, revision 1.49.6.7
1.1 bowersj2 1: # The LearningOnline Network with CAPA
2: # Quick Student Grades Display
3: #
1.49.6.7! raeburn 4: # $Id: lonquickgrades.pm,v 1.49.6.6 2020/09/01 14:38:07 raeburn Exp $
1.1 bowersj2 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonquickgrades;
30:
31: use strict;
1.49.6.1 raeburn 32: use Apache::Constants qw(:common :http REDIRECT);
1.5 bowersj2 33: use POSIX;
1.25 www 34: use Apache::loncommon;
35: use Apache::lonlocal;
1.36 albertel 36: use Apache::lonnet;
1.38 bowersj2 37: use Apache::grades;
1.49.6.3 raeburn 38: use Apache::lonuserstate;
1.1 bowersj2 39:
40: sub handler {
41: my $r = shift;
1.5 bowersj2 42: return real_handler($r);
43: }
44:
45: sub real_handler {
46: my $r = shift;
1.1 bowersj2 47:
48: &Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
49:
50: # Handle header-only request
1.40 albertel 51: if ($env{'browser.mathml'}) {
52: &Apache::loncommon::content_type($r,'text/xml');
53: } else {
54: &Apache::loncommon::content_type($r,'text/html');
55: }
1.1 bowersj2 56: if ($r->header_only) {
1.40 albertel 57: $r->send_http_header;
1.1 bowersj2 58: return OK;
59: }
60:
1.49.6.6 raeburn 61: my $cangrade=&Apache::lonnet::allowed('mgr');
1.49.6.4 raeburn 62: my $showPoints =
63: $env{'course.'.$env{'request.course.id'}.'.grading'} eq 'standard';
64:
65: my $reinitresult;
66:
1.49.6.6 raeburn 67: unless ($cangrade) {
1.49.6.2 raeburn 68: # Check for critical messages and redirect if present.
69: my ($redirect,$url) = &Apache::loncommon::critical_redirect(300);
70: if ($redirect) {
71: &Apache::loncommon::content_type($r,'text/html');
72: $r->header_out(Location => $url);
73: return REDIRECT;
74: }
75:
76: # Check if course needs to be re-initialized
77: my $loncaparev = $r->dir_config('lonVersion');
1.49.6.4 raeburn 78: ($reinitresult,my @reinit) = &Apache::loncommon::needs_coursereinit($loncaparev);
1.49.6.2 raeburn 79:
1.49.6.4 raeburn 80: if ($reinitresult eq 'switch') {
1.49.6.2 raeburn 81: &Apache::loncommon::content_type($r,'text/html');
82: $r->send_http_header;
83: $r->print(&Apache::loncommon::check_release_result(@reinit));
84: return OK;
1.49.6.4 raeburn 85: } elsif ($reinitresult eq 'update') {
86: my $cid = $env{'request.course.id'};
87: my $cnum = $env{'course.'.$cid.'.num'};
88: my $cdom = $env{'course.'.$cid.'.domain'};
89: &Apache::loncommon::content_type($r,'text/html');
90: $r->send_http_header;
91: &startpage($r,$showPoints);
92: my $preamble = '<div id="LC_update_'.$cid.'" class="LC_info">'.
93: '<br />'.
94: &mt('Your course session is being updated because of recent changes by course personnel.').
1.49.6.7! raeburn 95: ' '.&mt('Please be patient').'.<br /></div>'.
1.49.6.4 raeburn 96: '<div style="padding:0;clear:both;margin:0;border:0"></div>';
1.49.6.5 raeburn 97: my %prog_state = &Apache::lonhtmlcommon::Create_PrgWin($r,undef,$preamble);
1.49.6.4 raeburn 98: &Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,&mt('Updating course'));
99: $r->rflush();
1.49.6.2 raeburn 100: my ($furl,$ferr) = &Apache::lonuserstate::readmap("$cdom/$cnum");
1.49.6.7! raeburn 101: &Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,&mt('Finished!'));
1.49.6.4 raeburn 102: &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
103: my $closure = <<ENDCLOSE;
104: <script type="text/javascript">
105: // <![CDATA[
106: \$("#LC_update_$cid").hide('slow');
107: // ]]>
108: </script>
109: ENDCLOSE
1.49.6.2 raeburn 110: if ($ferr) {
1.49.6.4 raeburn 111: $r->print($closure.&Apache::loncommon::end_page());
1.49.6.2 raeburn 112: my $requrl = $r->uri;
113: $env{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
114: $env{'user.reinit'} = 1;
115: return HTTP_NOT_ACCEPTABLE;
1.49.6.4 raeburn 116: } else {
117: $r->print($closure);
1.49.6.2 raeburn 118: }
119: }
120: }
121:
1.49.6.4 raeburn 122: unless ($reinitresult eq 'update') {
123: # Send header, don't cache this page
124: &Apache::loncommon::no_cache($r);
125: $r->send_http_header;
126: &startpage($r,$showPoints);
127: }
128: $r->rflush();
1.1 bowersj2 129:
1.49.6.6 raeburn 130: &startGradeScreen($r);
131:
132: #
133: # Pick student
134: #
135: my $uname;
136: my $udom;
137: my $stdid;
138: if ($cangrade) {
139: if ($env{'form.uname'}) { $uname=$env{'form.uname'}; }
140: if ($env{'form.udom'}) { $udom=$env{'form.udom'}; }
141: if ($env{'form.id'}) { $stdid=$env{'form.id'}; }
142: if (($stdid) && ($udom)) {
143: $uname=(&Apache::lonnet::idget($udom,[$stdid],'ids'))[1];
144: }
145: if (($stdid) && (!$uname)) {
146: $r->print('<p><span class="LC_warning">'.&mt("Unknown Student/Employee ID: [_1]",$stdid).'</span></p>');
147: $stdid='';
148: }
149: if (($uname eq '') && ($udom eq '')) {
150: $uname = $env{'user.name'};
151: $udom = $env{'user.domain'};
152: }
153: $r->print('<form method="post" name="quickform" action="/adm/quickgrades">');
154: my $chooseopt=&Apache::loncommon::select_dom_form($udom,'udom').' '.
155: &Apache::loncommon::selectstudent_link('quickform','uname','udom');
156: $r->print("<p>\n".&Apache::loncommon::studentbrowser_javascript()."\n");
157: $r->print(&mt('For User [_1] or Student/Employee ID [_2] at Domain [_3]'
158: ,'<input type="text" value="'.$uname.'" size="12" name="uname" />'
159: ,'<input type="text" value="'.$stdid.'" size="12" name="id" /> '
160: ,$chooseopt).
161: ' <input type="submit" name="display" value="'.&mt('Display Individual Student').'" /></p>');
162: if (($uname) && ($udom)) {
163: $r->print('<p>'.&mt('Full Name: [_1]',&Apache::loncommon::plainname($uname,$udom)).'</p>');
164: }
165: } else {
166: $r->print('<p class="LC_info">'.&mt('This may take a few moments to display.').'</p>');
167: }
168: $r->rflush();
169:
1.49 www 170: my $notshowTotals=
171: $env{'course.'.$env{'request.course.id'}.'.grading'} eq 'externalnototals';
1.17 bowersj2 172:
1.49.6.6 raeburn 173: my ($navmap,$totalParts,$totalPossible,$totalRight,$totalAttempted,$topLevelParts,
174: $topLevelRight,$topLevelAttempted) = &getData($showPoints,$uname,$udom);
1.1 bowersj2 175:
1.49.6.6 raeburn 176: if (ref($navmap)) {
177: &outputTable($r,$showPoints,$notshowTotals,$navmap,$totalParts,$totalPossible,
178: $totalRight,$totalAttempted,$topLevelParts,$topLevelRight,
179: $topLevelAttempted);
180: } else {
181: if ($cangrade) { $r->print("\n</form>\n"); }
1.7 bowersj2 182: my $requrl = $r->uri;
1.49.6.6 raeburn 183: $env{'user.error.msg'} = "$requrl:bre:0:0:Navmap initialization failed.";
1.7 bowersj2 184: return HTTP_NOT_ACCEPTABLE;
185: }
1.49.6.6 raeburn 186: if ($cangrade) { $r->print("\n</form>\n"); }
187: &endGradeScreen($r);
188: return OK;
189: }
1.7 bowersj2 190:
1.49.6.6 raeburn 191: #
192: # Go through the complete course and collect data
193: #
1.17 bowersj2 194:
1.49.6.6 raeburn 195: sub getData {
1.17 bowersj2 196:
1.49.6.6 raeburn 197: my ($showPoints,$uname,$udom)=@_;
1.2 bowersj2 198:
1.49.6.6 raeburn 199: # Create the nav map
200: my $navmap = Apache::lonnavmaps::navmap->new($uname,$udom);
201:
202: if (!defined($navmap)) {
203: return ();
204: }
205:
206: my $res = $navmap->firstResource(); # temp resource to access constants
1.1 bowersj2 207:
208: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
209: my $depth = 1;
210: $iterator->next(); # ignore first BEGIN_MAP
211: my $curRes = $iterator->next();
1.49.6.6 raeburn 212:
1.5 bowersj2 213: # General overview of the following: Walk along the course resources.
214: # For every problem in the resource, tell its parent maps how many
215: # parts and how many parts correct it has. After that, each map will
216: # have a count of the total parts underneath it, correct and otherwise.
217: # After that, we will walk through the course again and read off
218: # maps in order, with their data.
219: # (If in the future people decide not to be cumulative, only add
220: # the counts to the parent map.)
1.17 bowersj2 221: # For convenience, "totalParts" is also "totalPoints" when we're looking
222: # at points; I can't come up with a variable name that makes sense
223: # equally for both cases.
1.5 bowersj2 224:
225: my $totalParts = 0; my $totalPossible = 0; my $totalRight = 0;
1.28 bowersj2 226: my $totalAttempted = 0;
1.14 bowersj2 227: my $now = time();
1.28 bowersj2 228: my $topLevelParts = 0; my $topLevelRight = 0; my $topLevelAttempted = 0;
1.5 bowersj2 229:
230: # Pre-run: Count parts correct
1.1 bowersj2 231: while ( $depth > 0 ) {
232: if ($curRes == $iterator->BEGIN_MAP()) {$depth++;}
233: if ($curRes == $iterator->END_MAP()) { $depth--; }
234:
1.7 bowersj2 235: if (ref($curRes) && $curRes->is_problem() && !$curRes->randomout)
1.5 bowersj2 236: {
237: # Get number of correct, incorrect parts
238: my $parts = $curRes->parts();
239: my $partsRight = 0;
1.17 bowersj2 240: my $partsCount = 0;
1.28 bowersj2 241: my $partsAttempted = 0;
1.5 bowersj2 242: my $stack = $iterator->getStack();
243:
244: for my $part (@{$parts}) {
1.28 bowersj2 245: my $dateStatus = $curRes->getDateStatus($part);
1.49.6.6 raeburn 246: my $weight = $curRes->weight($part);
247: my $problemstatus = $curRes->problemstatus($part);
248:
249: if ($curRes->solved($part) eq 'excused') {
1.21 matthew 250: next;
251: }
1.17 bowersj2 252: if ($showPoints) {
1.28 bowersj2 253: my $score = 0;
254: # If we're not telling status and the answer date isn't passed yet,
255: # it's an "attempted" point
1.49.6.6 raeburn 256: if ((($problemstatus eq 'no') ||
257: ($problemstatus eq 'no_feedback_ever')) &&
1.28 bowersj2 258: ($dateStatus != $curRes->ANSWER_OPEN)) {
1.31 albertel 259: my $status = $curRes->simpleStatus($part);
260: if ($status == $curRes->ATTEMPTED) {
1.49.6.6 raeburn 261: $partsAttempted += $weight;
1.31 albertel 262: $totalAttempted += $partsAttempted;
263: }
1.28 bowersj2 264: } else {
1.49.6.6 raeburn 265: $score = &Apache::grades::compute_points($weight, $curRes->awarded($part));
1.28 bowersj2 266: }
1.17 bowersj2 267: $partsRight += $score;
268: $totalRight += $score;
1.49.6.6 raeburn 269: $partsCount += $weight;
1.18 bowersj2 270:
1.17 bowersj2 271: if ($curRes->opendate($part) < $now) {
1.49.6.6 raeburn 272: $totalPossible += $weight;
1.17 bowersj2 273: }
1.49.6.6 raeburn 274: $totalParts += $weight;
1.17 bowersj2 275: } else {
1.27 bowersj2 276: my $status = $curRes->simpleStatus($part);
1.17 bowersj2 277: my $thisright = 0;
278: $partsCount++;
1.37 albertel 279: if ($status == $curRes->CORRECT ||
280: $status == $curRes->PARTIALLY_CORRECT ) {
1.17 bowersj2 281: $partsRight++;
282: $totalRight++;
283: $thisright = 1;
284: }
1.28 bowersj2 285:
286: if ($status == $curRes->ATTEMPTED) {
287: $partsAttempted++;
288: $totalAttempted++;
289: }
1.17 bowersj2 290:
1.19 bowersj2 291: $totalParts++;
1.17 bowersj2 292: if ($curRes->opendate($part) < $now) {
293: $totalPossible++;
294: }
295: }
1.5 bowersj2 296: }
1.15 bowersj2 297:
298: if ($depth == 1) { # in top-level only
1.19 bowersj2 299: $topLevelParts += $partsCount;
1.15 bowersj2 300: $topLevelRight += $partsRight;
1.28 bowersj2 301: $topLevelAttempted += $partsAttempted;
1.15 bowersj2 302: }
303:
1.5 bowersj2 304: # Crawl down stack and record parts correct and total
305: for my $res (@{$stack}) {
306: if (ref($res) && $res->is_map()) {
307: if (!defined($res->{DATA}->{CHILD_PARTS})) {
308: $res->{DATA}->{CHILD_PARTS} = 0;
309: $res->{DATA}->{CHILD_CORRECT} = 0;
1.28 bowersj2 310: $res->{DATA}->{CHILD_ATTEMPTED} = 0;
1.5 bowersj2 311: }
312:
1.17 bowersj2 313: $res->{DATA}->{CHILD_PARTS} += $partsCount;
1.5 bowersj2 314: $res->{DATA}->{CHILD_CORRECT} += $partsRight;
1.28 bowersj2 315: $res->{DATA}->{CHILD_ATTEMPTED} += $partsAttempted;
1.5 bowersj2 316: }
317: }
318: }
319: $curRes = $iterator->next();
320: }
1.49.6.6 raeburn 321: return ($navmap,$totalParts,$totalPossible,$totalRight,$totalAttempted,
322: $topLevelParts,$topLevelRight,$topLevelAttempted);
323: }
1.5 bowersj2 324:
1.49.6.6 raeburn 325: #
326: # Outputting everything.
327: #
328:
329: sub outputTable {
330:
331: my ($r,$showPoints,$notshowTotals,$navmap,$totalParts,$totalPossible,$totalRight,
332: $totalAttempted,$topLevelParts,$topLevelRight,$topLevelAttempted)=@_;
1.5 bowersj2 333:
1.7 bowersj2 334: my @start = (255, 255, 192);
1.5 bowersj2 335: my @end = (0, 192, 0);
336:
337: my $indentString = ' ';
338:
339: # Second pass: Print the maps.
1.43 bisitz 340: $r->print(&Apache::loncommon::start_data_table()
341: .&Apache::loncommon::start_data_table_header_row()
342: .'<th>'.&mt('Folder').'</th>');
1.49.6.5 raeburn 343: my $title = &mt($showPoints ? "Points Scored" : "Done");
1.28 bowersj2 344: if ($totalAttempted) {
1.49.6.6 raeburn 345: $title .= " / " . &mt("Attempted");
1.28 bowersj2 346: }
1.49 www 347: $r->print("<th>$title".($notshowTotals?'':" / ".&mt('Total')).'</th>'
1.43 bisitz 348: .&Apache::loncommon::end_data_table_header_row());
1.49.6.6 raeburn 349: #
350: # Output of folder scores
351: #
352:
353: my $iterator = $navmap->getIterator(undef, undef, undef, 1);
354: my $depth = 1;
355: $iterator->next(); # ignore first BEGIN_MAP
356: my $curRes = $iterator->next();
357:
1.5 bowersj2 358: while ($depth > 0) {
359: if ($curRes == $iterator->BEGIN_MAP()) {$depth++;}
360: if ($curRes == $iterator->END_MAP()) { $depth--; }
361:
362: if (ref($curRes) && $curRes->is_map()) {
363: my $title = $curRes->compTitle();
364:
365: my $correct = $curRes->{DATA}->{CHILD_CORRECT};
366: my $total = $curRes->{DATA}->{CHILD_PARTS};
1.28 bowersj2 367: my $attempted = $curRes->{DATA}->{CHILD_ATTEMPTED};
1.5 bowersj2 368:
1.6 bowersj2 369: if ($total > 0) {
370: my $ratio;
371: $ratio = $correct / $total;
1.49.6.4 raeburn 372: my $color = &mixColors(\@start, \@end, $ratio);
1.43 bisitz 373: $r->print(&Apache::loncommon::start_data_table_row()
374: .'<td style="background-color:'.$color.';">');
1.6 bowersj2 375:
1.15 bowersj2 376: my $thisIndent = '';
377: for (my $i = 1; $i < $depth; $i++) { $thisIndent .= $indentString; }
1.6 bowersj2 378:
1.15 bowersj2 379: $r->print("$thisIndent$title</td>");
1.28 bowersj2 380: if ($totalAttempted) {
1.45 bisitz 381: $r->print('<td valign="top">'
382: .$thisIndent
383: .'<span class="LC_nobreak">'
1.49 www 384: .$correct.' / '.$attempted.($notshowTotals?'':' / '.$total)
1.45 bisitz 385: .'</span></td>'
386: .&Apache::loncommon::end_data_table_row()
387: );
1.28 bowersj2 388: } else {
1.45 bisitz 389: $r->print('<td valign="top">'
390: .$thisIndent
391: .'<span class="LC_nobreak">'
1.49 www 392: .$correct.($notshowTotals?'':' / '.$total)
1.45 bisitz 393: .'</span></td>'
1.43 bisitz 394: .&Apache::loncommon::end_data_table_row());
1.28 bowersj2 395: }
1.6 bowersj2 396: }
1.5 bowersj2 397: }
1.4 bowersj2 398:
1.5 bowersj2 399: $curRes = $iterator->next();
400: }
1.4 bowersj2 401:
1.6 bowersj2 402: # If there were any problems at the top level, print an extra "catchall"
1.15 bowersj2 403: if ($topLevelParts > 0) {
404: my $ratio = $topLevelRight / $topLevelParts;
1.49.6.4 raeburn 405: my $color = &mixColors(\@start, \@end, $ratio);
1.43 bisitz 406: $r->print(&Apache::loncommon::start_data_table_row()
407: .'<td style="background-color:'.$color.';">');
1.25 www 408: $r->print(&mt("Problems Not Contained In A Folder")."</td><td>");
1.43 bisitz 409: $r->print("$topLevelRight / $topLevelParts</td>"
410: .&Apache::loncommon::end_data_table_row());
1.6 bowersj2 411: }
1.4 bowersj2 412:
1.49.6.6 raeburn 413: #
414: # show totals (if applicable), close table
415: #
1.35 albertel 416: if ($showPoints) {
1.49.6.4 raeburn 417: my $maxHelpLink = &Apache::loncommon::help_open_topic("Quick_Grades_Possibly_Correct");
1.2 bowersj2 418:
1.34 www 419: $title = $showPoints ? "Points" : "Parts Done";
1.41 bisitz 420: my $totaltitle = $showPoints ? &mt("Awarded Total Points") : &mt("Total Parts Done");
1.43 bisitz 421: $r->print(&Apache::loncommon::start_data_table_row()
1.48 bisitz 422: .'<td colspan="2" align="right">'.$totaltitle.': <b>'.$totalRight.'</b><br />');
423: $r->print(&mt('Max Possible To Date')." $maxHelpLink: <b>$totalPossible</b><br />");
1.34 www 424: $title = $showPoints ? "Points" : "Parts";
1.43 bisitz 425: $r->print(&mt("Total $title In Course").': <b>'.$totalParts.'</b></td>'
426: .&Apache::loncommon::end_data_table_row());
1.34 www 427: }
1.1 bowersj2 428:
1.49.6.6 raeburn 429: $r->print(&Apache::loncommon::end_data_table());
430: return;
1.5 bowersj2 431: }
432:
1.49.6.4 raeburn 433: sub startpage {
434: my ($r,$showPoints) = @_;
435: my $title = "Grading and Statistics";#$showPoints ? "Points Display" : "Completed Problems Display";
436: my $brcrum = [{href=>"/adm/quickgrades",text => "Points Display"}];
437: $r->print(&Apache::loncommon::start_page($title,undef,
438: {'bread_crumbs' => $brcrum})
439: );
440: }
441:
1.49.6.6 raeburn 442: sub startGradeScreen {
443: my ($r)=@_;
444:
445: my $showPoints =
446: $env{'course.'.$env{'request.course.id'}.'.grading'} eq 'standard';
447: my $notshowSPRSlink =
448: (($env{'course.'.$env{'request.course.id'}.'.grading'} eq 'external')
449: || ($env{'course.'.$env{'request.course.id'}.'.grading'} eq 'externalnototals'));
450: my $notshowTotals =
451: $env{'course.'.$env{'request.course.id'}.'.grading'} eq 'externalnototals';
452: my $showSPRSlink =
453: $env{'course.'.$env{'request.course.id'}.'.grading'} eq 'spreadsheet';
454:
455: my $allowed_to_view = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
456: if ((!$allowed_to_view) && ($env{'request.course.sec'} ne '')) {
457: $allowed_to_view = &Apache::lonnet::allowed('vgr',
458: "$env{'request.course.id'}/$env{'request.course.sec'}");
459: }
460:
461: my $allowed_to_edit = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
462: if ((!$allowed_to_edit) && ($env{'request.course.sec'} ne '')) {
463: $allowed_to_edit = &Apache::lonnet::allowed('mgr',
464: "$env{'request.course.id'}/$env{'request.course.sec'}");
465: }
466:
467: if ($allowed_to_view) {
468: my @notes;
469: push(@notes,&mt('Students do not see total points.')) if ($notshowTotals);
470: push(@notes,&mt('Students do not see link to spreadsheet.')) if ($notshowSPRSlink);
471: push(@notes,&mt('Students will see points based on problem weights.')) if ($showPoints);
472: push(@notes,&mt('Students will see link to spreadsheet.')) if ($showSPRSlink);
473: push(@notes,&Apache::lonhtmlcommon::coursepreflink(&mt('Grade display settings'),'grading'));
474: $r->print(&Apache::loncommon::head_subbox(join(' ',@notes)));
475: } elsif (!$allowed_to_edit) {
476: if (!$showPoints && !$notshowSPRSlink ) {
477: $r->print(&Apache::loncommon::head_subbox(
478: &mt('This screen shows how many problems (or problem parts) you have completed'
479: .', and how many you have not yet done.'
480: .' You can also look at [_1]a detailed score sheet[_2].'
481: ,'<a href="/adm/studentcalc">','</a>')));
482: }
483: }
484: return;
485: }
486:
487: sub endGradeScreen {
488: my ($r)=@_;
489: $r->print(&Apache::loncommon::end_page());
490: return;
491: }
492:
1.5 bowersj2 493: # Pass this two refs to arrays for the start and end color, and a number
494: # from 0 to 1 for how much of the latter you want to mix in. It will
495: # return a string ready to show ("#FFC309");
496: sub mixColors {
497: my $start = shift;
498: my $end = shift;
499: my $ratio = shift;
500:
1.9 matthew 501: my ($a,$b);
1.5 bowersj2 502: my $final = "";
1.9 matthew 503: $a = $start->[0]; $b = $end->[0];
1.5 bowersj2 504: my $mix1 = POSIX::floor((1-$ratio)*$a + $ratio*$b);
1.9 matthew 505: $a = $start->[1]; $b = $end->[1];
1.5 bowersj2 506: my $mix2 = POSIX::floor((1-$ratio)*$a + $ratio*$b);
1.9 matthew 507: $a = $start->[2]; $b = $end->[2];
1.5 bowersj2 508: my $mix3 = POSIX::floor((1-$ratio)*$a + $ratio*$b);
509:
1.16 bowersj2 510: $final = sprintf "%02x%02x%02x", $mix1, $mix2, $mix3;
1.5 bowersj2 511: return "#" . $final;
1.1 bowersj2 512: }
513:
514: 1;
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonquickgrades.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / interface