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1################################################################################ 1################################################################################
2# WeBWorK Online Homework Delivery System 2# WeBWorK Online Homework Delivery System
3# Copyright © 2000-2007 The WeBWorK Project, http://openwebwork.sf.net/ 3# Copyright © 2000-2007 The WeBWorK Project, http://openwebwork.sf.net/
4# $CVSHeader: pg/macros/AppletObjects.pl,v 1.6 2008/03/26 02:43:07 gage Exp $ 4# $CVSHeader: pg/macros/AppletObjects.pl,v 1.7 2008/04/26 21:19:14 gage Exp $
5# 5#
6# This program is free software; you can redistribute it and/or modify it under 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 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 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. 9# version, or (b) the "Artistic License" which comes with this package.
… …
42 </script> 42 </script>
43 <script src="/webwork2_files/js/Base64.js" language="javascript"> 43 <script src="/webwork2_files/js/Base64.js" language="javascript">
44 </script> 44 </script>
45 45
46<script language="JavaScript"> 46<script language="JavaScript">
47 var applet_initializeAction_list = new Object;
48 var applet_submitAction_list = new Object;
49 var applet_setState_list = new Object;
50 var applet_getState_list = new Object;
51 var applet_config_list = new Object;
52 47
48//////////////////////////////////////////////////////////
49// applet lists
50//////////////////////////////////////////////////////////
51
52 var applet_initializeAction_list = new Object; // functions for initializing question with an applet
53 var applet_submitAction_list = new Object; // functions for submitting question with applet
54 var applet_setState_list = new Object; // functions for setting state (XML) from applets
55 var applet_getState_list = new Object; // functions for getting state (XML) from applets
56 var applet_config_list = new Object; // functions for configuring on applets
57 var applet_checkLoaded_list = new Object; // functions for probing the applet to see if it is loaded
58 var applet_reportsLoaded_list = new Object; // flag set by applet
59 var applet_isReady_list = new Object; // flag set by javaScript in checkLoaded
53 60
54 function base64Q(str) { 61//////////////////////////////////////////////////////////
55 return ( !str.match(/<XML/i) && !str.match(/<?xml/i)); 62// DEBUGGING tools
56 } 63//////////////////////////////////////////////////////////
57 64 var debug = $debugMode;
65 var debugText = "";
66 function debug_add(str) {
67 if (debug) {
68 debugText = debugText + "\n\n" +str;
69 }
70 }
71
72//////////////////////////////////////////////////////////
73// INITIALIZE and SUBMIT actions
74//////////////////////////////////////////////////////////
75
58 function submitAction() { 76 function submitAction() {
59 //alert("submit Action" ); 77 //alert("submit Action" );
60 for (var applet in applet_submitAction_list) { 78 for (var applet in applet_submitAction_list) {
61 //alert(applet); 79 //alert(applet);
62 applet_submitAction_list[applet](); 80 applet_submitAction_list[applet]();
63 } 81 }
64 82
65 } 83 }
66 // Give some time delay before initializing
67 function initializeAction() { 84 function initializeAction() {
68 //alert("ready to initialize"); 85 var iMax = 10;
69 // give some delay to allow flash applet to load. FIXME 86 debugText="start intializeAction() with up to " +iMax + " attempts\n";
70 window.setTimeout("initializeAction1()",200); 87 for (var appletName in applet_initializeAction_list) {
71 //initializeAction1(); 88 safe_applet_initialize(appletName, iMax);
89 }
90
72 } 91 }
73 function initializeAction1() { 92
74 93 // applet can set isReady flag by calling applet_loaded(appletName, loaded);
75 for (var appletName in applet_initializeAction_list) { 94 function applet_loaded(appletName,loaded) {
76 //alert("initialize: " + appletName); 95 applet_reportsLoaded_list[appletName] = loaded; // 0 means not loaded
77 try{ 96 debug_add("applet reporting that it has been loaded = " + loaded );
78 applet_config_list[appletName]();
79 } catch(e) {
80 alert("unable to configure " + appletName + " It may have been slow to load. " +e );
81 }
82 try{
83 applet_initializeAction_list[appletName]();
84 } catch(e) {
85 alert("unable to initialize " + appletName + " It may have been slow to load. " +e );
86 }
87 }
88 } 97 }
89 98
99 // insures that applet is loaded before initializing it
100 function safe_applet_initialize(appletName, i) {
101 debug_add("Iteration " + i + " of safe_applet_initialize with applet " + appletName );
102
103 i--;
104 var applet_loaded = applet_checkLoaded_list[appletName]();
105 debug_add("applet is ready = " + applet_loaded );
106
107 if ( 0 < i && !applet_loaded ) { // wait until applet is loaded
108 debug_add("applet " + appletName + "not ready try again");
109 window.setTimeout( "safe_applet_initialize(\"" + appletName + "\"," + i + ")",1);
110 } else if( 0 < i ){ // now that applet is loaded configure it and initialize it with saved data.
111 debug_add(" Ready to initialize applet " + appletName + " with " + i + " iterations left. ");
112
113 // in-line handler -- configure and initialize
114 try{
115 if (debug && typeof(getApplet(appletName).debug) == "function" ) {
116 getApplet(appletName).debug(1);
117 }
118 } catch(e) {
119 alert("Unable to set debug mode for applet " + appletName);
120 }
121 try{
122 applet_config_list[appletName]();
123 } catch(e) {
124 alert("Unable to configure " + appletName + " \n " +e );
125 }
126 try{
127 applet_initializeAction_list[appletName]();
128 } catch(e) {
129 alert("unable to initialize " + appletName + " \n " +e );
130 }
131
132 } else {
133 if (debug) {alert("Error: timed out waiting for applet " +appletName + " to load");}
134 }
135 if (debug) {alert(debugText); debugText="";};
136 }
137
138///////////////////////////////////////////////////////
139// Utility functions
140///////////////////////////////////////////////////////
90 141
91 var flash; 142
92 function getApplet(appletName) { 143 function getApplet(appletName) {
93 var isIE = navigator.appName.indexOf("Microsoft") != -1; 144 var isIE = navigator.appName.indexOf("Microsoft") != -1;
94 var obj = (isIE) ? window[appletName] : window.document[appletName]; 145 var obj = (isIE) ? window[appletName] : window.document[appletName];
95 //return window.document[appletName]; 146 //return window.document[appletName];
96 if (obj && (obj.name = appletName)) { 147 if (obj && (obj.name = appletName)) {
97 return( obj ); 148 return( obj );
98 } else { 149 } else {
99 alert ("can't find applet " + appletName); 150 // alert ("can't find applet " + appletName);
100 } 151 }
101 } 152 }
102 153
103 function listQuestionElements() { // list all HTML input and textarea elements in main problem form 154 function listQuestionElements() { // list all HTML input and textarea elements in main problem form
104 var isIE = navigator.appName.indexOf("Microsoft") != -1; 155 var isIE = navigator.appName.indexOf("Microsoft") != -1;
105 var elementList = (isIE) ? document.getElementsByTagName("input") : document.problemMainForm.getElementsByTagName("input"); 156 var elementList = (isIE) ? document.getElementsByTagName("input") : document.problemMainForm.getElementsByTagName("input");
106 var str=elementList.length +" Question Elements\n type | name = value < id > \n"; 157 var str=elementList.length +" Question Elements\n type | name = value < id > \n";
107 for( var i=0; i< elementList.length; i++) { 158 for( var i=0; i< elementList.length; i++) {
108 str = str + " "+i+" " + elementList[i].type 159 str = str + " "+i+" " + elementList[i].type
109 + " | " + elementList[i].name 160 + " | " + elementList[i].name
110 + "= " + elementList[i].value + 161 + "= " + elementList[i].value +
111 " <" + elementList[i].id + ">\n"; 162 " <" + elementList[i].id + ">\n";
112 } 163 }
113 elementList = (isIE) ? document.getElementsByTagName("textarea") : document.problemMainForm.getElementsByTagName("textarea"); 164 elementList = (isIE) ? document.getElementsByTagName("textarea") : document.problemMainForm.getElementsByTagName("textarea");
114 for( var i=0; i< elementList.length; i++) { 165 for( var i=0; i< elementList.length; i++) {
115 str = str + " "+i+" " + elementList[i].type 166 str = str + " "+i+" " + elementList[i].type
116 + " | " + elementList[i].name 167 + " | " + elementList[i].name
117 + "= " + elementList[i].value + 168 + "= " + elementList[i].value +
118 " <" + elementList[i].id + ">\n"; 169 " <" + elementList[i].id + ">\n";
119 } 170 }
120 alert(str +"\n Place listQuestionElements() at end of document in order to get all form elements!"); 171 alert(str +"\n Place listQuestionElements() at end of document in order to get all form elements!");
121 } 172 }
122 173
174 function base64Q(str) {
175 return ( !str.match(/<XML/i) && !str.match(/<?xml/i));
176 }
177 function setEmptyState(appletName){
178 var newState = "<xml></xml>";
179 applet_setState_list[appletName](newState);
180 var applet = getApplet(appletName);
181 getQE(appletName+"_state").value = newState;
182 getQE("previous_" + appletName + "_state").value = newState
183 }
184
123 function getQE(name1) { // get Question Element in problemMainForm by name 185 function getQE(name1) { // get Question Element in problemMainForm by name
124 var isIE = navigator.appName.indexOf("Microsoft") != -1; 186 var isIE = navigator.appName.indexOf("Microsoft") != -1;
125 var obj = (isIE) ? document.getElementById(name1) 187 var obj = (isIE) ? document.getElementById(name1)
126 :document.problemMainForm[name1]; 188 :document.problemMainForm[name1];
127 // needed for IE -- searches id and name space so it can be unreliable if names are not unique 189 // needed for IE -- searches id and name space so it can be unreliable if names are not unique
128 if (!obj || obj.name != name1) { 190 if (!obj || obj.name != name1) {
129 alert("Can't find element " + name1); 191 alert("Can't find element " + name1);
130 listQuestionElements(); 192 listQuestionElements();
131 } else { 193 } else {
132 return( obj ); 194 return( obj );
133 } 195 }
134 196
135 } 197 }
136 function getQuestionElement(name1) { 198 function getQuestionElement(name1) {
137 return getQE(name1); 199 return getQE(name1);
138 } 200 }
139 201
140 </script> 202 </script>
141 203
142END_HEADER_TEXT 204END_HEADER_TEXT
143 205
… …
232 > 294 >
233 !; 295 !;
234 my $state_input_element = ($self->debug == 1) ? $debug_input_element : 296 my $state_input_element = ($self->debug == 1) ? $debug_input_element :
235 qq!\n<input type="hidden" name = "$appletStateName" value ="$base_64_encoded_answer_value">!; 297 qq!\n<input type="hidden" name = "$appletStateName" value ="$base_64_encoded_answer_value">!;
236 my $reset_button_str = ($reset_button) ? 298 my $reset_button_str = ($reset_button) ?
237 qq!<br/><input type='button' value='set applet state empty' onClick="applet_setState_list['$appletName']('<xml></xml>')"> 299 qq!<br/><input type='button' value='set applet state empty' onClick="setEmptyState('$appletName')">
238 <input type="button" value="reinitialize applet" onClick="initializeAction()"/>! 300 <input type="button" value="reinitialize applet" onClick="getQE('$appletStateName').value='$base64_initialState'"/>!
239 : '' 301 : ''
240 ; 302 ;
241 # always base64 encode the hidden answer value to prevent problems with quotes. 303 # always base64 encode the hidden answer value to prevent problems with quotes.
242 # 304 #
243 $state_storage_html_code = 305 $state_storage_html_code =
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