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1 : gage 5582 ################################################################################
2 :     # WeBWorK Online Homework Delivery System
3 :     # Copyright 2000-2007 The WeBWorK Project, http://openwebwork.sf.net/
4 : gage 6010 # $CVSHeader: pg/macros/AppletObjects.pl,v 1.16 2009/02/07 23:08:34 gage Exp $
5 : gage 5582 #
6 :     # This program is free software; you can redistribute it and/or modify it under
7 :     # the terms of either: (a) the GNU General Public License as published by the
8 :     # Free Software Foundation; either version 2, or (at your option) any later
9 :     # version, or (b) the "Artistic License" which comes with this package.
10 :     #
11 :     # This program is distributed in the hope that it will be useful, but WITHOUT
12 :     # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 :     # FOR A PARTICULAR PURPOSE. See either the GNU General Public License or the
14 :     # Artistic License for more details.
15 :     ################################################################################
16 :    
17 :     =head1 NAME
18 :    
19 : gage 5618 AppletObjects.pl - Macro-based front end for the Applet.pm module.
20 : gage 5582
21 :    
22 :     =head1 DESCRIPTION
23 :    
24 :     This subroutines in this
25 : gage 5971 file provide mechanisms to insert Flash applets (and Java applets)
26 : gage 5582 into a WeBWorK problem.
27 :    
28 :    
29 :     =head1 SEE ALSO
30 :    
31 :     L<Applets.pm>.
32 :    
33 :     =cut
34 :    
35 : gage 5667 #########################################################################
36 :     #
37 :     # Add basic functionality to the header of the question
38 :     #
39 :     # don't reload this file
40 :     #########################################################################
41 : gage 5582
42 : gage 6010 sub _AppletObjects_init {
43 : gage 5618
44 :     main::HEADER_TEXT(<<'END_HEADER_TEXT');
45 :     <script language="javascript">AC_FL_RunContent = 0;</script>
46 :     <script src="/webwork2_files/applets/AC_RunActiveContent.js" language="javascript">
47 :     </script>
48 :     <script src="/webwork2_files/js/Base64.js" language="javascript">
49 : gage 5993 </script>
50 :     <script src="/webwork2_files/js/ww_applet_support.js">
51 :     //upload functions stored in /opt/webwork/webwork2/htdocs/js ...
52 : gage 5997
53 : gage 5996 </script>
54 : gage 5618 END_HEADER_TEXT
55 :    
56 : gage 5667 };
57 : gage 5618
58 : gage 5582 =head3
59 :     FlashApplet
60 :    
61 :     Useage: $applet = FlashApplet();
62 :    
63 :     =cut
64 :    
65 :     sub FlashApplet {
66 : gage 5597 return new FlashApplet(@_);
67 : gage 5582
68 :     }
69 :    
70 : gage 5618 sub JavaApplet {
71 :     return new JavaApplet(@_);
72 : gage 5582
73 : gage 5618 }
74 :    
75 :     package Applet;
76 :    
77 :    
78 :    
79 : gage 5582 =head2 Methods
80 :    
81 :     =cut
82 :    
83 :     ## this method is defined in this file
84 :     ## because the main subroutines HEADER_TEXT and MODES are
85 :     ## not available to the module FlashApplet when that file
86 :     ## is compiled (at the time the apache child process is first initialized)
87 :    
88 : gage 5618 =head3 insertAll
89 : gage 5582
90 : gage 5618 Useage: TEXT( $applet->insertAll() );
91 :     \{ $applet->insertAll() \} (used within BEGIN_TEXT/END_TEXT blocks)
92 : gage 5582
93 :     =cut
94 :    
95 :     =pod
96 :    
97 :     Inserts applet at this point in the HTML code. (In TeX mode a message "Applet" is written.) This method
98 :     also adds the applets header material into the header portion of the HTML page. It effectively inserts
99 : gage 5618 the outputs of both C<$applet-E<gt>insertHeader> and C<$applet-E<gt>insertObject> (defined in L<Applet.pm> )
100 :     in the appropriate places.
101 : gage 5582
102 : gage 5618 Note: This method is defined here rather than in Applet.pl because it
103 :     requires access to the RECORD_FORM_LABEL subroutine
104 :     and to the routine accessing the stored values of the answers. These are defined in main::.
105 :    
106 : gage 5582 =cut
107 :    
108 : gage 5618 sub insertAll { ## inserts both header text and object text
109 : gage 5582 my $self = shift;
110 : gage 5618 my %options = @_;
111 :     $self->debug( (defined($options{debug}) and $options{debug}==1) ? 1 : 0 );
112 :     my $reset_button = $options{reset_button} || 0;
113 :     # prepare html code for storing state
114 :     my $appletName = $self->appletName;
115 :     my $appletStateName = "${appletName}_state";
116 :     my $getState = $self->getStateAlias;
117 :     my $setState = $self->setStateAlias;
118 :     my $base64_initialState = $self->base64_state;
119 :     main::RECORD_FORM_LABEL($appletStateName); #this insures that they'll be saved from one invocation to the next
120 :     #main::RECORD_FORM_LABEL("previous_$appletStateName");
121 :     my $answer_value = '';
122 : gage 5993
123 :     if ( defined( ${$main::inputs_ref}{$appletStateName} ) and ${$main::inputs_ref}{$appletStateName} =~ /\S/ ) {
124 :     $answer_value = ${$main::inputs_ref}{$appletStateName};
125 :     } elsif ( defined( $main::rh_sticky_answers->{$appletStateName} ) ) {
126 :     warn "type of sticky answers is ", ref( $main::rh_sticky_answers->{$appletStateName} );
127 : gage 5618 $answer_value = shift( @{ $main::rh_sticky_answers->{$appletStateName} });
128 :     }
129 :     $answer_value =~ tr/\\$@`//d; #`## make sure student answers can not be interpolated by e.g. EV3
130 :     $answer_value =~ s/\s+/ /g; ## remove excessive whitespace from student answer
131 :     #######
132 :     # insert a hidden variable to hold the applet's state (debug =>1 makes it visible for debugging and provides debugging buttons)
133 :     #######
134 : gage 5993 my $base_64_encoded_answer_value;
135 :     my $decoded_answer_value;
136 :     if ( $answer_value =~/<XML|<?xml/i) {
137 :     $base_64_encoded_answer_value = encode_base64($answer_value);
138 :     $decoded_answer_value = $answer_value;
139 :     } else {
140 :     $decoded_answer_value = decode_base64($answer_value);
141 :     if ( $decoded_answer_value =~/<XML|<?xml/i) { # great, we've decoded the answer to obtain an xml string
142 :     $base_64_encoded_answer_value = $answer_value;
143 :     } else { #WTF?? apparently we don't have XML tags
144 :     $answer_value = "<xml>$answer_value</xml>";
145 :     $base_64_encoded_answer_value = encode_base64($answer_value);
146 :     $decoded_answer_value = $answer_value;
147 :     }
148 :     }
149 : gage 5677 $base_64_encoded_answer_value =~ s/\r|\n//g; # get rid of line returns
150 : gage 5993 # debug version of the applet state answerBox and controls
151 : gage 5618 my $debug_input_element = qq!\n<textarea rows="4" cols="80"
152 :     name = "$appletStateName">$decoded_answer_value</textarea><br/>
153 : gage 5623 <input type="button" value="$getState"
154 : gage 5993 onClick="debugText='';
155 :     ww_applet_list['$appletName'].getState();
156 :     alert(debugText);"
157 : gage 5623 >
158 :     <input type="button" value="$setState"
159 : gage 5993 onClick="debugText='';
160 :     ww_applet_list['$appletName'].setState();
161 :     alert(debugText);"
162 : gage 5623 >
163 : gage 5618 !;
164 :     my $state_input_element = ($self->debug == 1) ? $debug_input_element :
165 :     qq!\n<input type="hidden" name = "$appletStateName" value ="$base_64_encoded_answer_value">!;
166 :     my $reset_button_str = ($reset_button) ?
167 : gage 6010 qq!<br/><input type='button' value='set applet state to restart' onClick="setAppletStateToRestart('$appletName')">
168 :     <input type="button" value="reinitialize applet" onClick="getQE('$appletStateName').value='$base64_initialState'"/><br/>!
169 : gage 5618 : ''
170 :     ;
171 :     # always base64 encode the hidden answer value to prevent problems with quotes.
172 :     #
173 :     $state_storage_html_code =
174 :     $reset_button_str.
175 :     $state_input_element.
176 :     qq!<input type="hidden" name="previous_$appletStateName" value = "$base_64_encoded_answer_value">!;
177 : gage 5993 $state_storage_html_code = qq!<input type="hidden" name="previous_$appletStateName" value = "$base_64_encoded_answer_value">!
178 :     . $reset_button_str
179 :     . $state_input_element
180 :     ;
181 : gage 6010 $answerBox_code = qq!<br/><input type="input" name="answerBox" value="" size =50><br/>
182 :     <input type="button" value="get Answer from applet" onClick="eval(ww_applet_list['$appletName'].submitActionScript )"/>
183 :     <br/>
184 :     !;
185 :     $answerBox_code = ($self->debug == 1) ? $answerBox_code : "";
186 : gage 5618 #######
187 :     # insert header material
188 :     #######
189 : gage 5582 main::HEADER_TEXT($self->insertHeader());
190 : gage 6010 return main::MODES(TeX=>' {\bf applet } ', HTML=>$self->insertObject.$main::BR.$state_storage_html_code.$answerBox_code);
191 : gage 5582 }
192 :    
193 :     =head3 Example problem
194 :    
195 :    
196 :     =cut
197 :    
198 :    
199 :    
200 :     =pod
201 :    
202 :    
203 :     DOCUMENT();
204 :    
205 :     # Load whatever macros you need for the problem
206 :     loadMacros("PG.pl",
207 :     "PGbasicmacros.pl",
208 :     "PGchoicemacros.pl",
209 :     "PGanswermacros.pl",
210 :     "AppletObjects.pl",
211 :     "MathObjects.pl",
212 :     "source.pl"
213 :     );
214 :    
215 :     ## Do NOT show partial correct answers
216 :     $showPartialCorrectAnswers = 0;
217 :    
218 :    
219 :    
220 :     ###################################
221 :     # Create link to applet
222 :     ###################################
223 :    
224 :     $applet = FlashApplet();
225 :     my $appletName = "ExternalInterface";
226 :     $applet->codebase(findAppletCodebase("$appletName.swf"));
227 :     $applet->appletName($appletName);
228 :     $applet->appletId($appletName);
229 :    
230 :     # findAppletCodebase looks for the applet in a list
231 :     # of locations specified in global.conf
232 :    
233 :     ###################################
234 : gage 5618 # Add additional javaScript functions to header section of HTML to
235 : gage 5593 # communicate with the "ExternalInterface" applet.
236 : gage 5582 ###################################
237 :    
238 :     $applet->header(<<'END_HEADER');
239 :     <script type="text/javascript" src="https://devel.webwork.rochester.edu:8002/webwork2_files/js/BrowserSniffer.js">
240 :     </script>
241 :    
242 :    
243 :     <script language="JavaScript">
244 :     function getBrowser() {
245 :     //alert("look for sniffer");
246 :     var sniffer = new BrowserSniffer();
247 :     //alert("found sniffer" +sniffer);
248 :     return sniffer;
249 :     }
250 :    
251 :     function updateStatus(sMessage) {
252 : gage 5618 getQE("playbackStatus").value = sMessage;
253 : gage 5582 }
254 :    
255 :     function newColor() {
256 : gage 5618
257 :     getApplet("ExternalInterface").updateColor(Math.round(Math.random() * 0xFFFFFF));
258 : gage 5582 }
259 :    
260 :     </script>
261 :     END_HEADER
262 :    
263 :     ###################################
264 :     # Configure applet
265 :     ###################################
266 :    
267 :     # not used here. Allows for uploading an xml string for the applet
268 :    
269 :    
270 :    
271 :    
272 :     ###################################
273 :     # write the text for the problem
274 :     ###################################
275 :    
276 :     TEXT(beginproblem());
277 :    
278 :    
279 :    
280 :     BEGIN_TEXT
281 : gage 5618 \{ $applet->insertAll() \}
282 : gage 5582 $PAR
283 :    
284 :     The Flash object operates above this line. The box and button below this line are part of
285 :     the WeBWorK problem. They communicate with the Flash object.
286 :     $HR
287 :     Status <input type="text" id="playbackStatus" value="started" /><br />
288 :     Color <input type="button" value="new color" name="newColorButton" onClick="newColor()" />
289 :     $PAR $HR
290 :     This flash applet was created by Barbara Kaskosz.
291 :    
292 :     END_TEXT
293 :    
294 :     ENDDOCUMENT();
295 :    
296 :    
297 :    
298 :    
299 :     =cut

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