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Diff for /loncom/interface/Attic/lonwizard.pm between versions 1.11 and 1.16

version 1.11, 2003/02/21 18:50:09 version 1.16, 2003/02/28 23:47:37
Line 9  use Apache::lonnet; Line 9  use Apache::lonnet;
   
 =head1 lonwizard - HTML "Wizard" framework for LON-CAPA  =head1 lonwizard - HTML "Wizard" framework for LON-CAPA
   
 I know how most developers feel about Wizards, but the fact is they are a well-established UI widget that users feel comfortable with. It can take a complicated multi-dimensional problem the user has (such as the canonical Course Parameter example) and turn in into a series of bite-sized one-dimensional questions. Or take the some four-question form and put it in a Wizard, and present the same user with the same form outside of the Wizard, and the user will *think* the Wizard is easier.  Wizards are a well-established UI widget that users feel comfortable with. It can take a complicated multi-dimensional problem the user has (such as the canonical Course Parameter example) and turn in into a series of bite-sized one-dimensional questions. Or take the some four-question form and put it in a Wizard, and present the same user with the same form outside of the Wizard, and the user will *think* the Wizard is easier.
   
 For the developer, wizards do provide an easy way to bundle easy bits of functionality for the user. It can be easier to write a Wizard then provide another custom interface.  For the developer, wizards do provide an easy way to bundle easy bits of functionality for the user, without having to write the tedious code for maintaining state between frames. It can be easier to write a Wizard then provide another custom interface.
   
 All classes are in the Apache::lonwizard namespace.  All classes are in the Apache::lonwizard namespace.
   
Line 30  use Apache::loncommon; Line 30  use Apache::loncommon;
   
 =head1 Class: lonwizard  =head1 Class: lonwizard
   
   FIXME: Doc the parameters of the wizard well: Title, Data (Query string), URL.
   
 =head2 lonwizard Attributes  =head2 lonwizard Attributes
   
 =over 4  =over 4
Line 59  sub new { Line 61  sub new {
   
     $self->{TITLE} = shift;      $self->{TITLE} = shift;
     $self->{DATA} = shift;      $self->{DATA} = shift;
       $self->{URL} = shift;
     &Apache::loncommon::get_unprocessed_cgi($self->{DATA});      &Apache::loncommon::get_unprocessed_cgi($self->{DATA});
   
   
Line 73  sub new { Line 76  sub new {
  $self->{STATE} = "START";   $self->{STATE} = "START";
     }      }
   
     # set up return URL: Return the user to the referer page, unless the  
     # form has stored a value.  
     if (defined $ENV{"form.RETURN_PAGE"})      if (defined $ENV{"form.RETURN_PAGE"})
     {      {
  $self->{RETURN_PAGE} = $ENV{"form.RETURN_PAGE"};   $self->{RETURN_PAGE} = $ENV{"form.RETURN_PAGE"};
Line 169  sub _saveVars { Line 170  sub _saveVars {
   
 =pod  =pod
   
 =item B<registerState>(referenceToStateObj): Registers a state as part of the wizard, so the wizard can use it. The 'referenceToStateObj' should be a reference to an instantiated lonwizstate object. This is normally called at the end of the lonwizstate constructor.  =item B<registerState>(referenceToStateObj): Registers a state as part of the wizard, so the wizard can use it. The 'referenceToStateObj' should be a reference to an instantiated lonwizstate object. This is normally called at the end of the lonwizard::state constructor, so you should not normally need it as a user.
   
 =cut  =cut
   
Line 198  sub changeState { Line 199  sub changeState {
   
 =cut  =cut
   
 # Done in five phases  # Done in four phases
 # 1: Do the post processing for the previous state.  # 1: Do the post processing for the previous state.
 # 2: Do the preprocessing for the current state.  # 2: Do the preprocessing for the current state.
 # 3: Check to see if state changed, if so, postprocess current and move to next.  # 3: Check to see if state changed, if so, postprocess current and move to next.
Line 210  sub display { Line 211  sub display {
     my $result = "";      my $result = "";
   
     # Phase 1: Post processing for state of previous screen (which is actually      # Phase 1: Post processing for state of previous screen (which is actually
     # the current state), if it wasn't the beginning state.      # the "current state" in terms of the wizard variables), if it wasn't the 
     if ($self->{STATE} ne "START" || $ENV{"form.SUBMIT"} eq "Next ->")      # beginning state.
     {      if ($self->{STATE} ne "START" || $ENV{"form.SUBMIT"} eq "Next ->") {
  my $prevState = $self->{STATES}{$self->{STATE}};   my $prevState = $self->{STATES}{$self->{STATE}};
  $prevState->postprocess();              $prevState->postprocess();
     }      }
           
     # Note, to handle errors in a state's input that a user must correct,      # Note, to handle errors in a state's input that a user must correct,
Line 225  sub display { Line 226  sub display {
     my $startState = $self->{STATE};      my $startState = $self->{STATE};
     my $state = $self->{STATES}{$startState};      my $state = $self->{STATES}{$startState};
           
     # Error checking      # Error checking; it is intended that the developer will have
       # checked all paths and the user can't see this!
     if (!defined($state)) {      if (!defined($state)) {
         $result .="Error! The state ". $startState ." is not defined.";          $result .="Error! The state ". $startState ." is not defined.";
         return $result;          return $result;
Line 265  HEADER Line 267  HEADER
   
     if (!$state->overrideForm()) {      if (!$state->overrideForm()) {
         $result .= '<center>';          $result .= '<center>';
         if ($self->{STATE} ne $self->{START_STATE})          if ($self->{STATE} ne $self->{START_STATE}) {
         {  
             #$result .= '<input name="SUBMIT" type="submit" value="&lt;- Previous" />&nbsp;&nbsp;';              #$result .= '<input name="SUBMIT" type="submit" value="&lt;- Previous" />&nbsp;&nbsp;';
         }          }
         if ($self->{DONE})          if ($self->{DONE}) {
         {  
             my $returnPage = $self->{RETURN_PAGE};              my $returnPage = $self->{RETURN_PAGE};
             $result .= "<a href=\"$returnPage\">End Wizard</a>";              $result .= "<a href=\"$returnPage\">End Wizard</a>";
         }          }
         else          else {
         {  
             $result .= '<input name="back" type="button" ';              $result .= '<input name="back" type="button" ';
             $result .= 'value="&lt;- Previous" onclick="history.go(-1)" /> ';              $result .= 'value="&lt;- Previous" onclick="history.go(-1)" /> ';
             $result .= '<input name="SUBMIT" type="submit" value="Next -&gt;" />';              $result .= '<input name="SUBMIT" type="submit" value="Next -&gt;" />';
Line 410  WIZBEGIN Line 409  WIZBEGIN
        ["map", "Every problem in a particular <b>folder</b>", "CHOOSE_FOLDER"],         ["map", "Every problem in a particular <b>folder</b>", "CHOOSE_FOLDER"],
        ["resource", "One particular <b>problem</b>", "CHOOSE_RESOURCE"]],         ["resource", "One particular <b>problem</b>", "CHOOSE_RESOURCE"]],
                                          "Which problems do you wish to change a date for?");                                           "Which problems do you wish to change a date for?");
     Apache::lonwizard::resource_choice->new($wizard, "CHOOSE_FOLDER", "Select Folder", "Select the folder you wish to set the date for:", "", "CHOOSE_ACTION", "RESOURCE_ID", sub {my $res = shift; return $res->is_map();});      Apache::lonwizard::resource_choice->new($wizard, "CHOOSE_FOLDER", "Select Folder", "Select the folder you wish to set the date for:", "CHOOSE_ACTION", "RESOURCE_ID", sub {my $res = shift; return $res->is_map();});
     Apache::lonwizard::resource_choice->new($wizard, "CHOOSE_RESOURCE", "Select Resource", "", "", "CHOOSE_ACTION", "RESOURCE_ID", sub {my $res = shift; return $res->is_map() || $res->is_problem();}, sub {my $res = shift; return $res->is_problem(); });      Apache::lonwizard::resource_choice->new($wizard, "CHOOSE_RESOURCE", "Select Resource", "", "CHOOSE_ACTION", "RESOURCE_ID", sub {my $res = shift; return $res->is_map() || $res->is_problem();}, sub {my $res = shift; return $res->is_problem(); });
     my $levelType = $levelTypeHash{$wizard->{VARS}->{GRANULARITY}};      my $levelType = $levelTypeHash{$wizard->{VARS}->{GRANULARITY}};
     Apache::lonwizard::switch_state->new($wizard, "CHOOSE_ACTION", "Parameter Type", "ACTION_TYPE", [       Apache::lonwizard::switch_state->new($wizard, "CHOOSE_ACTION", "Parameter Type", "ACTION_TYPE", [ 
        ["open_date", "Set an <b>open date</b>", "CHOOSE_DATE"],          ["open_date", "Set an <b>open date</b>", "CHOOSE_DATE"], 
Line 426  WIZBEGIN Line 425  WIZBEGIN
        ["student", ". . . for an individual <b>student</b>", "CHOOSE_STUDENT"]],         ["student", ". . . for an individual <b>student</b>", "CHOOSE_STUDENT"]],
                                        "Set $dateType of $levelType for. . .");                                         "Set $dateType of $levelType for. . .");
   
     Apache::lonwizard::choose_section->new($wizard, "CHOOSE_SECTION", "Select Section", "Please select the section you wish to set the $dateType for:", "", "FINISH", "SECTION_NAME");      Apache::lonwizard::choose_section->new($wizard, "CHOOSE_SECTION", "Select Section", "Please select the section you wish to set the $dateType for:", "FINISH", "SECTION_NAME");
     Apache::lonwizard::choose_student->new($wizard, "CHOOSE_STUDENT", "Select Student", "Please select the student you wish to set the $dateType for:", "", "FINISH", "USER_NAME");      Apache::lonwizard::choose_student->new($wizard, "CHOOSE_STUDENT", "Select Student", "Please select the student you wish to set the $dateType for:", "FINISH", "USER_NAME");
     Apache::lonwizard::parmwizfinal->new($wizard, "FINISH", "Confirm Selection");      Apache::lonwizard::parmwizfinal->new($wizard, "FINISH", "Confirm Selection");
   
     $r->print($wizard->display());      $r->print($wizard->display());
Line 519  sub process_multiple_choices { Line 518  sub process_multiple_choices {
     my $var = shift;      my $var = shift;
     my $wizard = $self->{WIZARD};      my $wizard = $self->{WIZARD};
   
     my $formvalue = $ENV{'form.' . $var};      my $formvalue = $ENV{'form.' . $formname};
     if ($formvalue) {      if ($formvalue) {
         # Must extract values from $wizard->{DATA} directly, as there          # Must extract values from $wizard->{DATA} directly, as there
         # may be more then one.          # may be more then one.
         my @values;          my @values;
         for my $formparam (split (/&/, $wizard->{DATA})) {          for my $formparam (split (/&/, $wizard->{DATA})) {
             my ($name, $value) = split(/=/, $formparam);              my ($name, $value) = split(/=/, $formparam);
             if ($name ne $var) {              if ($name ne $formname) {
                 next;                  next;
             }              }
             $value =~ tr/+/ /;              $value =~ tr/+/ /;
Line 623  If there is only one choice, the state w Line 622  If there is only one choice, the state w
   
 =over 4  =over 4
   
 =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, messageAfter, nextState, varName, choiceHash): messageBefore is the HTML text that will be displayed before the choice display, messageAfter will display after. Keys will be sorted according to human name. nextState is the state to proceed to after the choice. varName is the name of the wizard var to store the computer_name answer in. choiceHash is the hash described above. It is optional because you may override it.  =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, nextState, varName, choiceHash, multichoice): messageBefore is the HTML text that will be displayed before the choice display. Keys will be sorted according to human name. nextState is the state to proceed to after the choice. varName is the name of the wizard var to store the computer_name answer in. choiceHash is the hash described above. It is optional because you may override it. multichoice is true if the user can make multiple choices, false otherwise. (Multiple choices will be seperated with ||| in the wizard variable.
   
 =back  =back
   
Line 635  sub new { Line 634  sub new {
     my $self = bless $proto->SUPER::new(shift, shift, shift);      my $self = bless $proto->SUPER::new(shift, shift, shift);
   
     $self->{MESSAGE_BEFORE} = shift;      $self->{MESSAGE_BEFORE} = shift;
     $self->{MESSAGE_AFTER} = shift;  
     $self->{NEXT_STATE} = shift;      $self->{NEXT_STATE} = shift;
     $self->{VAR_NAME} = shift;      $self->{VAR_NAME} = shift;
     $self->{CHOICE_HASH} = shift;      $self->{CHOICE_HASH} = shift;
       $self->{MULTICHOICE} = shift;
     $self->{NO_CHOICES} = 0;      $self->{NO_CHOICES} = 0;
           
     return $self;      return $self;
Line 676  sub preprocess { Line 675  sub preprocess {
 }  }
   
 sub determineChoices {  sub determineChoices {
     return {"NO_CHOICE" => "No choices were given."};      # Return no choices, which will terminate the wizard
       return {};
 }  }
   
 sub render {   sub render { 
     my $self = shift;      my $self = shift;
     my $result = "";      my $result = "";
     my $var = $self->{VAR_NAME};      my $var = $self->{VAR_NAME};
       my $buttons = '';
   
       if ($self->{MULTICHOICE}) {
           $result = <<SCRIPT;
   <script>
       function checkall(value) {
    for (i=0; i<document.forms.wizform.elements.length; i++) {
               document.forms.wizform.elements[i].checked=value;
           }
       }
   </script>
   SCRIPT
           $buttons = <<BUTTONS;
   <input type="button" onclick="checkall(true)" value="Select All" />
   <input type="button" onclick="checkall(false)" value="Unselect All" />
   <br />
   BUTTONS
       }
           
     if (defined $self->{ERROR_MSG}) {      if (defined $self->{ERROR_MSG}) {
         $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';          $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
     }      }
Line 692  sub render { Line 710  sub render {
  $result .= $self->{MESSAGE_BEFORE} . '<br /><br />';   $result .= $self->{MESSAGE_BEFORE} . '<br /><br />';
     }      }
   
       $result .= $buttons;
   
     my $choices = $self->{CHOICE_HASH};      my $choices = $self->{CHOICE_HASH};
     my @keys = keys (%$choices);      my @keys = keys (%$choices);
   
     $result .= "<select name=\"$var.forminput\" size=\"10\">\n";      my $type = "radio";
     foreach (@keys)      if ($self->{MULTICHOICE}) { $type = 'checkbox'; }
     {      foreach (@keys) {
  $result .= "<option value=\"" . HTML::Entities::encode($choices->{$_})           
             . "\">" . HTML::Entities::encode($_) . "</option>\n";          $result .= "<input type='$type' name='" .
     }              $self->{VAR_NAME} . '.forminput' .
     $result .= "</select>\n\n";              "' value=\"" . 
               HTML::Entities::encode($choices->{$_}) 
     if (defined $self->{MESSAGE_AFTER})              . "\"/> " . HTML::Entities::encode($_) . "<br />\n";
     {  
  $result .= '<br /><br />' . $self->{MESSAGE_AFTER};  
     }      }
   
     return $result;      return $result;
Line 716  sub postprocess { Line 734  sub postprocess {
     my $wizard = $self->{WIZARD};      my $wizard = $self->{WIZARD};
     my $formvalue = $ENV{'form.' . $self->{VAR_NAME} . '.forminput'};      my $formvalue = $ENV{'form.' . $self->{VAR_NAME} . '.forminput'};
     if ($formvalue) {      if ($formvalue) {
         # Value already stored by Wizard          if ($self->{MULTICHOICE}) {
               $self->process_multiple_choices($self->{VAR_NAME}.'.forminput',
                                               $self->{VAR_NAME});
           }
           # For non-multichoice, value already stored by Wizard
         $wizard->changeState($self->{NEXT_STATE});          $wizard->changeState($self->{NEXT_STATE});
     } else {      } else {
         $self->{ERROR_MSG} = "Can't continue the wizard because you must make"          $self->{ERROR_MSG} = "Can't continue the wizard because you must make"
Line 741  Each choice may have arbitrary HTML asso Line 763  Each choice may have arbitrary HTML asso
   
 =over 4  =over 4
   
 =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, varName, choiceList, messageBefore, messageAfter): varName is the name of the wizard variable the state will set with the choice made. choiceHash is list reference of a list of list references to three element lists, where the first element is what the wizard var varName will be set to, the second is the HTML that will be displayed for that choice, and the third is the destination state. messageBefore is an optional HTML string that will be placed before the message, messageAfter an optional HTML string that will be placed before.  =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, varName, choiceList, messageBefore): varName is the name of the wizard variable the state will set with the choice made. choiceHash is list reference of a list of list references to three element lists, where the first element is what the wizard var varName will be set to, the second is the HTML that will be displayed for that choice, and the third is the destination state. The special setting 'ILLEGAL' can be used in the first place to state that it is not a legal chocie (see lonprintout.pm for real-life usage of that). messageBefore is an optional HTML string that will be placed before the message.
   
   Note that ILLEGAL is desirable because some choices may not always be good choices, but they should not necessarily disappear with no explanantion of why they are no good. In lonprintout.pm, for instance, the choice "Problems from current sequence" may be no good because there are no problems in the sequence, but it should not silently disappear; it should announce that there are no problems in the sequence.
   
 An example of a legit choiceList: C<my $choicelist = [ ["flunk", "Flunk Student", "FLUNK_STATE"], ["pass", "Pass Student", "PASS_STATE"] ];>  An example of a legit choiceList: C<my $choicelist = [ ["flunk", "Flunk Student", "FLUNK_STATE"], ["pass", "Pass Student", "PASS_STATE"]  ];>
   
 =back  =back
   
Line 757  sub new { Line 781  sub new {
     $self->{VAR_NAME} = shift;      $self->{VAR_NAME} = shift;
     $self->{CHOICE_LIST} = shift;      $self->{CHOICE_LIST} = shift;
     $self->{MESSAGE_BEFORE} = shift;      $self->{MESSAGE_BEFORE} = shift;
     $self->{MESSAGE_AFTER} = shift;  
   
     return $self;      return $self;
 }  }
Line 773  sub render { Line 796  sub render {
   
     $result .= $self->{MESSAGE_BEFORE} if (defined $self->{MESSAGE_BEFORE});      $result .= $self->{MESSAGE_BEFORE} if (defined $self->{MESSAGE_BEFORE});
   
     if (!$curVal) {  
         $curVal = $self->{CHOICE_LIST}->[0]->[0]; # top is default  
     }  
   
     $result .= "<table>\n\n";      $result .= "<table>\n\n";
   
     foreach my $choice (@choices)      my $checked = 0;
     {      foreach my $choice (@choices) {
  my $value = $choice->[0];   my $value = $choice->[0];
  my $text = $choice->[1];   my $text = $choice->[1];
           
  $result .= "<tr>\n<td width='20'>&nbsp;</td>\n<td>";   $result .= "<tr>\n<td width='20'>&nbsp;</td>\n<td>";
  $result .= "<td valign=\"top\"><input type=\"radio\" name=\"$var.forminput\"";   $result .= "<td valign=\"top\"><input type=\"radio\" name=\"$var.forminput\"";
  $result .= " checked" if ($value eq $curVal);          if (!$checked) {
               $result .= " selected";
               $checked = 1;
           }
  $result .= " value=\"$value\"></td>\n<td>$text</td>\n</tr>\n\n";   $result .= " value=\"$value\"></td>\n<td>$text</td>\n</tr>\n\n";
     }      }
   
     $result .= "<table>\n\n";      $result .= "<table>\n\n";
   
     $result .= $self->{MESSAGE_AFTER} if (defined $self->{MESSAGE_AFTER});  
   
     return $result;      return $result;
 }  }
   
Line 803  sub postprocess { Line 823  sub postprocess {
     my $wizard = $self->{WIZARD};      my $wizard = $self->{WIZARD};
     my $chosenValue = $ENV{"form." . $self->{VAR_NAME} . '.forminput'};      my $chosenValue = $ENV{"form." . $self->{VAR_NAME} . '.forminput'};
   
     foreach my $choice (@{$self->{CHOICE_LIST}})      foreach my $choice (@{$self->{CHOICE_LIST}}) {
     {   if ($choice->[0] eq $chosenValue) {
  if ($choice->[0] eq $chosenValue)  
  {  
     $wizard->changeState($choice->[2]);      $wizard->changeState($choice->[2]);
  }   }
     }      }
Line 818  sub preprocess { Line 836  sub preprocess {
     my $choiceList = $self->{CHOICE_LIST};      my $choiceList = $self->{CHOICE_LIST};
     my $wizard = $self->{WIZARD};      my $wizard = $self->{WIZARD};
           
     if (scalar(@{$choiceList}) == 1)      if (scalar(@{$choiceList}) == 1) {
     {  
  my $choice = $choiceList->[0];   my $choice = $choiceList->[0];
  my $chosenVal = $choice->[0];   my $chosenVal = $choice->[0];
  my $nextState = $choice->[2];   my $nextState = $choice->[2];
Line 853  Date state provides a state for selectin Line 870  Date state provides a state for selectin
   
 =over 4  =over 4
   
 =item overriddent method B<new>(parentLonWizReference, stateName, stateTitle, varName, nextState, messageBefore, messageAfter, displayJustDate): varName is where the date/time will be stored as seconds since the epoch. messageBefore and messageAfter as other states. displayJustDate is a flag defaulting to false that if true, will only display the date selection (defaulting to midnight on that date). Otherwise, minutes and hours will be shown.  =item overriddent method B<new>(parentLonWizReference, stateName, stateTitle, varName, nextState, messageBefore, displayJustDate): varName is where the date/time will be stored as seconds since the epoch. messageBefore and messageAfter as other states. displayJustDate is a flag defaulting to false that if true, will only display the date selection (defaulting to midnight on that date). Otherwise, minutes and hours will be shown.
   
 =back  =back
   
Line 867  sub new { Line 884  sub new {
     $self->{VAR_NAME} = shift;      $self->{VAR_NAME} = shift;
     $self->{NEXT_STATE} = shift;      $self->{NEXT_STATE} = shift;
     $self->{MESSAGE_BEFORE} = shift;      $self->{MESSAGE_BEFORE} = shift;
     $self->{MESSAGE_AFTER} = shift;  
     $self->{DISPLAY_JUST_DATE} = shift;      $self->{DISPLAY_JUST_DATE} = shift;
     if (!defined($self->{DISPLAY_JUST_DATE})) {$self->{DISPLAY_JUST_DATE} = 0;}      if (!defined($self->{DISPLAY_JUST_DATE})) {$self->{DISPLAY_JUST_DATE} = 0;}
     return $self;      return $self;
Line 882  sub render { Line 898  sub render {
   
     my $date;      my $date;
           
     # Pick default date: Now, or previous choice      # Default date: Now
     if (defined ($wizvars->{$var}) && $wizvars->{$var} ne "")      $date = localtime($wizvars->{$var});
     {   
  $date = localtime($wizvars->{$var});  
     }  
     else  
     {  
  $date = localtime();  
     }  
   
     if (defined $self->{ERROR_MSG}) {      if (defined $self->{ERROR_MSG}) {
         $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';          $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
Line 1026  sub postprocess { Line 1035  sub postprocess {
 package Apache::lonwizard::parmwizfinal;  package Apache::lonwizard::parmwizfinal;
   
 # This is the final state for the parmwizard. It is not generally useful,  # This is the final state for the parmwizard. It is not generally useful,
 # so it is not perldoc'ed. It does it's own processing.  # so it is not perldoc'ed. It does its own processing.
   
 no strict;  no strict;
 @ISA = ('Apache::lonwizard::state');  @ISA = ('Apache::lonwizard::state');
Line 1164  Note this state will not automatically a Line 1173  Note this state will not automatically a
   
 =over 4  =over 4
   
 =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, messageAfter, nextState, varName, filterFunction, choiceFunction): messageBefore and messageAfter appear before and after the state choice, respectively. nextState is the state to proceed to after the choice. varName is the wizard variable to store the choice in.  =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, nextState, varName, filterFunction, choiceFunction): messageBefore and messageAfter appear before and after the state choice, respectively. nextState is the state to proceed to after the choice. varName is the wizard variable to store the choice in.
   
 filterFunction is a function reference that receives the current resource as an argument, and returns 1 if it should be displayed, and 0 if it should not be displayed. By default, the class will use sub {return 1;}, which will show all resources. choiceFunction is a reference to a function that receives the resource object as a parameter and returns 1 if it should be a *selectable choice*, and 0 if not. By default, this is the same as the filterFunction, which means all displayed choices will be choosable. See parm wizard for an example of this in the resource selection routines.  filterFunction is a function reference that receives the current resource as an argument, and returns 1 if it should be displayed, and 0 if it should not be displayed. By default, the class will use sub {return 1;}, which will show all resources. choiceFunction is a reference to a function that receives the resource object as a parameter and returns 1 if it should be a *selectable choice*, and 0 if not. By default, this is the same as the filterFunction, which means all displayed choices will be choosable. See parm wizard for an example of this in the resource selection routines.
   
Line 1182  sub new { Line 1191  sub new {
     my $self = bless $proto->SUPER::new(shift, shift, shift);      my $self = bless $proto->SUPER::new(shift, shift, shift);
   
     $self->{MESSAGE_BEFORE} = shift;      $self->{MESSAGE_BEFORE} = shift;
     $self->{MESSAGE_AFTER} = shift;  
     $self->{NEXT_STATE} = shift;      $self->{NEXT_STATE} = shift;
     $self->{VAR_NAME} = shift;      $self->{VAR_NAME} = shift;
     $self->{FILTER_FUNC} = shift;      $self->{FILTER_FUNC} = shift;
Line 1227  sub postprocess { Line 1235  sub postprocess {
 # it renders the same states, so it doesn't go in just this state, and  # it renders the same states, so it doesn't go in just this state, and
 # you can lean on the browser back button to make sure it all chains  # you can lean on the browser back button to make sure it all chains
 # correctly.  # correctly.
   # Either that, or force all folders open and don't allow the user
   # to close them.
   
 sub render {  sub render {
     my $self = shift;      my $self = shift;
Line 1254  sub render { Line 1264  sub render {
     my $choiceFunc = $self->{CHOICE_FUNC};      my $choiceFunc = $self->{CHOICE_FUNC};
   
     # Create the composite function that renders the column on the nav map      # Create the composite function that renders the column on the nav map
       # have to admit any language that lets me do this can't be all bad
       #  - Jeremy (Pythonista) ;-)
     my $renderColFunc = sub {      my $renderColFunc = sub {
         my ($resource, $part, $params) = @_;          my ($resource, $part, $params) = @_;
                   
Line 1274  sub render { Line 1286  sub render {
                                                   Apache::lonnavmaps::resource()],                                                    Apache::lonnavmaps::resource()],
                                        'showParts' => 0,                                         'showParts' => 0,
                                        'queryString' => $wizard->queryStringVars() . '&folderManip=1',                                         'queryString' => $wizard->queryStringVars() . '&folderManip=1',
                                        'url' => '/adm/wizard',                                         'url' => $wizard->{URL},
                                        'filterFunc' => $filterFunc } );                                         'filterFunc' => $filterFunc } );
                                                                                                   
     $result .= $self->{MESSAGE_AFTER} if (defined $self->{MESSAGE_AFTER});  
   
     return $result;      return $result;
 }  }
           
Line 1296  Note this state will not automatically a Line 1306  Note this state will not automatically a
   
 This is generally intended for use on a specific sequence, not the entire course, as for technical reasons the user can't open and close folders, so they must all be shown as open. To fix this would require making the folders image form submitters and remembering the selected state of each resource, which is not impossible but is too much error-prone work to do until it seems many people will want that feature.  This is generally intended for use on a specific sequence, not the entire course, as for technical reasons the user can't open and close folders, so they must all be shown as open. To fix this would require making the folders image form submitters and remembering the selected state of each resource, which is not impossible but is too much error-prone work to do until it seems many people will want that feature.
   
   Note this class is generally useful for multi-choice selections, by overridding "determineChoices" to return the choice hash.
   
 =over 4  =over 4
   
 =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, messageAfter, nextState, varName, filterFunction, choiceFunction, map): Arguments like resource_choice. map is the ID number of a specific map that, if given is all that will be shown to the user, instead of the whole course.  =item overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, nextState, varName, filterFunction, choiceFunction, map): Arguments like resource_choice. map is the ID number of a specific map that, if given is all that will be shown to the user, instead of the whole course.
   
 =back  =back
   
Line 1314  sub new { Line 1326  sub new {
     my $self = bless $proto->SUPER::new(shift, shift, shift);      my $self = bless $proto->SUPER::new(shift, shift, shift);
   
     $self->{MESSAGE_BEFORE} = shift;      $self->{MESSAGE_BEFORE} = shift;
     $self->{MESSAGE_AFTER} = shift;  
     $self->{NEXT_STATE} = shift;      $self->{NEXT_STATE} = shift;
     $self->{VAR_NAME} = shift;      $self->{VAR_NAME} = shift;
     $self->{FILTER_FUNC} = shift;      $self->{FILTER_FUNC} = shift;
Line 1402  BUTTONS Line 1413  BUTTONS
   
     $result .= $buttons;      $result .= $buttons;
   
     $result .= $self->{MESSAGE_AFTER} if (defined $self->{MESSAGE_AFTER});  
   
     return $result;      return $result;
 }  }
 1;  1;
Line 1411  BUTTONS Line 1420  BUTTONS
 package Apache::lonwizard::choose_student;  package Apache::lonwizard::choose_student;
   
 no strict;  no strict;
 @ISA = ("Apache::lonwizard::choice_state");  @ISA = ("Apache::lonwizard::state");
 use strict;  use strict;
   
 sub new {  sub new {
     my $proto = shift;      my $proto = shift;
     my $class = ref($proto) || $proto;      my $class = ref($proto) || $proto;
     my $self = bless $proto->SUPER::new(shift, shift, shift, shift,      my $self = bless $proto->SUPER::new(shift, shift, shift);
                                         shift, shift, shift);  
       $self->{MESSAGE_BEFORE} = shift;
       $self->{NEXT_STATE} = shift;
       $self->{VAR_NAME} = shift;
       $self->{MULTICHOICE} = shift;
   
     return $self;      return $self;
 }  }
   
 sub determineChoices {  sub render {
     my %choices;      my $self = shift;
       my $result = '';
       my $var = $self->{VAR_NAME};
       my $buttons = '';
   
     my $classlist = Apache::loncoursedata::get_classlist();      if ($self->{MULTICHOICE}) {
     foreach (keys %$classlist) {          $result = <<SCRIPT;
         $choices{$classlist->{$_}->[6]} = $_;  <script>
       function checkall(value) {
    for (i=0; i<document.forms.wizform.elements.length; i++) {
               document.forms.wizform.elements[i].checked=value;
           }
     }      }
       </script>
     return \%choices;  SCRIPT
           $buttons = <<BUTTONS;
   <input type="button" onclick="checkall(true)" value="Select All" />
   <input type="button" onclick="checkall(false)" value="Unselect All" />
   <br />
   BUTTONS
       }
   
       if (defined $self->{ERROR_MSG}) {
           $result .= '<font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
       }
   
       if (defined $self->{MESSAGE_BEFORE}) {
           $result .= $self->{MESSAGE_BEFORE} . '<br /><br />';
       }
   
       $result .= $buttons;
   
       my $choices = &Apache::loncoursedata::get_classlist();
   
       my @keys = keys %{$choices};
       # Sort by: Section, name
   
       my $section = Apache::loncoursedata::CL_SECTION();
       my $fullname = Apache::loncoursedata::CL_FULLNAME();
   
       @keys = sort {
           if ($choices->{$a}->[$section] ne $choices->{$b}->[$section]) {
               return $choices->{$a}->[$section] cmp $choices->{$b}->[$section];
           }
           return $choices->{$a}->[$fullname] cmp $choices->{$b}->[$fullname];
       } @keys;
   
       my $type = 'radio';
       if ($self->{MULTICHOICE}) { $type = 'checkbox'; }
       $result .= "<table cellspacing='2' cellpadding='2' border='0'>\n";
       $result .= "<tr><td></td><td align='center'><b>Student Name</b></td>".
           "<td align='center'><b>Section</b></td></tr>";
   
       foreach (@keys) {
           $result .= "<tr><td><input type='$type' name='" .
               $self->{VAR_NAME} . '.forminput' .
               "' value='" . HTML::Entities::encode($_)
               . "' /></td><td>"
               . HTML::Entities::encode($choices->{$_}->[$fullname])
               . "</td><td align='center'>" 
               . HTML::Entities::encode($choices->{$_}->[$section])
               . "</td></tr>\n";
       }
   
       $result .= "</table>\n\n";
       $result .= $buttons;
   
       return $result;
 }  }
   
   sub postprocess {
       my $self = shift;
       my $wizard = $self->{WIZARD};
       my $formvalue = $ENV{'form.' . $self->{VAR_NAME} . '.forminput'};
       if ($formvalue) {
           if ($self->{MULTICHOICE}) {
               $self->process_multiple_choices($self->{VAR_NAME}.'.forminput',
                                               $self->{VAR_NAME});
           }
           $wizard->changeState($self->{NEXT_STATE});
       } else {
           $self->{ERROR_MSG} = "Can't continue the wizard because you must make"
               . ' a selection to continue.';
       }
       return 1;
   }
   
   
 1;  1;
   
 package Apache::lonwizard::choose_section;  package Apache::lonwizard::choose_section;
Line 1477  choose_file offers a choice of files fro Line 1569  choose_file offers a choice of files fro
   
 =over 4  =over 4
   
 =item * overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, messageAfter, nextState, varName, subdir, filterFunc): As in previous states, where filterFunc is as described in choose_file. subdir is the name of the subdirectory to offer choices from.  =item * overridden method B<new>(parentLonWizReference, stateName, stateTitle, messageBefore, nextState, varName, subdir, filterFunc): As in previous states, where filterFunc is as described in choose_file. subdir is the name of the subdirectory to offer choices from.
   
 =back  =back
   
Line 1493  sub new { Line 1585  sub new {
     my $self = bless $proto->SUPER::new(shift, shift, shift);      my $self = bless $proto->SUPER::new(shift, shift, shift);
           
     $self->{MESSAGE_BEFORE} = shift;      $self->{MESSAGE_BEFORE} = shift;
     $self->{MESSAGE_AFTER} = shift;  
     $self->{NEXT_STATE} = shift;      $self->{NEXT_STATE} = shift;
     $self->{VAR_NAME} = shift;      $self->{VAR_NAME} = shift;
     $self->{SUB_DIR} = shift;      $self->{SUB_DIR} = shift;
Line 1582  BUTTONS Line 1673  BUTTONS
   
     $result .= $buttons;      $result .= $buttons;
   
     if ($self->{MESSAGE_AFTER}) {  
         $result .= "<br /><br />" . $self->{MESSAGE_AFTER};  
     }  
   
     return $result;      return $result;
 }  }
   
Removed from v.1.11  
changed lines
  Added in v.1.16

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