342 lines
11 KiB
PHP
342 lines
11 KiB
PHP
<?php
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/*
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*
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* @(#) $Id: form_linked_select.php,v 1.18 2012/04/19 10:02:00 mlemos Exp $
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*
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*/
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class form_linked_select_class extends form_custom_class
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{
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var $select="";
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var $group="";
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var $switch_group="";
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var $linked_input="";
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var $selected_group="";
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var $groups=array();
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var $server_validate=0;
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var $multiple=0;
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var $dynamic=0;
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var $default_dynamic=0;
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var $group_parameter="___group";
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Function GetGroupOptions(&$options,$group)
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{
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if(IsSet($this->groups[$group]))
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$options=$this->groups[$group];
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else
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Unset($options);
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return("");
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}
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Function GetGroups(&$groups)
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{
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$groups=array();
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Reset($this->groups);
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for($g=0;$g<count($this->groups);$g++)
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{
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$groups[]=strval(Key($this->groups));
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Next($this->groups);
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}
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return("");
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}
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Function ValidateGroups(&$arguments)
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{
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if(!IsSet($arguments["Groups"])
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|| GetType($arguments["Groups"])!="array")
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return("it were not specified the groups of options");
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$this->groups=$arguments["Groups"];
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if(!IsSet($this->groups[$this->selected_group]))
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return("the current linked input value does not match any of the select options groups");
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if(!IsSet($this->groups[$this->selected_group]))
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{
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if((!IsSet($arguments["Group"])
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|| !IsSet($arguments["Groups"][$arguments["Group"]])))
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return("it was not specified a valid group for the current options");
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$this->selected_group=$arguments["Group"];
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}
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UnSet($arguments["Groups"]);
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UnSet($arguments["Group"]);
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return("");
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}
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Function AddInput(&$form, $arguments)
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{
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if(!IsSet($arguments["LinkedInput"]))
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return("it was not specified a valid input to link the select input");
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$this->linked_input=$arguments["LinkedInput"];
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$this->selected_group=$form->GetInputValue($this->linked_input);
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if(strlen($error=$this->ValidateGroups($arguments)))
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return($error);
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$this->dynamic=(IsSet($arguments["Dynamic"]) ? intval($arguments["Dynamic"]) : $this->default_dynamic);
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if(!$this->dynamic
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&& (IsSet($arguments["AutoWidthLimit"])
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|| IsSet($arguments["AutoHeightLimit"])))
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{
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if(strlen($error=$this->GetGroups($groups)))
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return($error);
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$w=$h=0;
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for($g=0;$g<count($groups);$g++)
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{
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$group=$groups[$g];
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if(strlen($error=$this->GetGroupOptions($options,$group)))
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return($error);
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Reset($options);
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for($o=0;$o<count($options);$o++)
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{
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$option=strval(Key($options));
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$w=max($w,strlen($options[$option]));
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Next($options);
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}
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$h=max($h,$o);
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}
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if(IsSet($arguments["AutoWidthLimit"]))
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{
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if($arguments["AutoWidthLimit"]>0)
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$w=min($w+1,$arguments["AutoWidthLimit"]);
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$arguments["STYLE"]="width: ".strval($w)."em".(IsSet($arguments["STYLE"]) ? "; ".$arguments["STYLE"] : "");
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}
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if(IsSet($arguments["AutoHeightLimit"]))
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{
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if($arguments["AutoHeightLimit"]>0)
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$h=min($h,$arguments["AutoHeightLimit"]);
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$arguments["SIZE"]=strval($h);
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}
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}
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UnSet($arguments["Dynamic"]);
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UnSet($arguments["AutoWidthLimit"]);
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UnSet($arguments["AutoHeightLimit"]);
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if(strlen($error=$this->GetGroupOptions($selected_group,$this->selected_group)))
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return($error);
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$select_arguments=$arguments;
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UnSet($select_arguments["LinkedInput"]);
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$this->select=$this->GenerateInputID($form, $this->input, "select");
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$this->group=$this->GenerateInputID($form, $this->input, "group");
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$this->switch_group=$this->GenerateInputID($form, $this->input, "switch_group");
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$select_arguments["NAME"]=$select_arguments["ID"]=$this->focus_input=$this->select;
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$select_arguments["TYPE"]="select";
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$select_arguments["OPTIONS"]=$selected_group;
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$select_arguments["DiscardInvalidValues"]=0;
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$this->multiple=IsSet($arguments["MULTIPLE"]);
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if($this->multiple)
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{
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$select_arguments["MULTIPLE"]=1;
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if(!IsSet($select_arguments["SELECTED"]))
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$select_arguments["SELECTED"]=array();
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}
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else
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UnSet($select_arguments["MULTIPLE"]);
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UnSet($select_arguments["CustomClass"]);
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if(strlen($error=$form->AddInput($select_arguments))==0
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&& strlen($error=$form->AddInput(array(
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"TYPE"=>"hidden",
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"ID"=>$this->group,
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"NAME"=>$this->group,
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"VALUE"=>$this->selected_group
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)))==0)
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$error=$form->Connect($this->linked_input, $this->input, "ONCHANGE", "SwitchGroup", array("GroupProperty"=>"VALUE"));
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return($error);
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}
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Function AddInputPart(&$form)
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{
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$eol=$form->end_of_line;
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$b="";
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$javascript="<script type=\"text/javascript\" defer=\"defer\">".$eol."<!--\n";
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if($this->dynamic)
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{
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$javascript.="var ".$this->switch_group."_g=null;".$eol;
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$javascript.="var ".$this->switch_group."_f=null;".$eol;
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$javascript.="var ".$this->switch_group."_n=null;".$eol;
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}
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$javascript.="function ".$this->switch_group."(".($this->dynamic ? "" : "g,f").")".$b."{".$b;
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$javascript.="var n, o, i, s, a, b, bi;".$b;
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if($this->dynamic)
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$javascript.="var n=".$this->switch_group."_n;".$b;
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else
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{
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if(strlen($error=$this->GetGroups($groups)))
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return($error);
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for($g=0, $append="";$g<count($groups); $g++)
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{
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$group=$groups[$g];
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if($g>0)
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$javascript.="}".$b."else".$b."{".$b;
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$javascript.="if(g==".$form->EncodeJavascriptString($group).")".$b."{".$b."n=[";
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$append.="}".$b;
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if(strlen($error=$this->GetGroupOptions($options,$group)))
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return($error);
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Reset($options);
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for($o=0;$o<count($options);$o++)
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{
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$option=strval(Key($options));
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if($o>0)
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$javascript.=",";
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$javascript.=$form->EncodeJavascriptString($options[$option]).",".$form->EncodeJavascriptString($option);
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Next($options);
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}
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$javascript.="]".$b;
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}
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$javascript.="}".$b."else".$b."{".$b."n=null".$b.$append;
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}
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$javascript.="if(n!=null)".$b."{".$b;
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if($this->dynamic)
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$javascript.="var g=".$this->switch_group."_g;".$b."f=".$this->switch_group."_f;".$b;
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$javascript.="s=f[".$form->EncodeJavascriptString($this->select)."];".$b."o=s.options;".$b;
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if(!$this->multiple)
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$javascript.="bi=bi=s.selectedIndex;".$b."if(bi>=0) { b=o[bi].value };".$b;
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$javascript.="i=0;".$b."while(i<n.length)".$b."{".$b."o[i/2]=new Option(n[i],n[i+1]);".$b."i=i+2;".$b."}".$b."while(i<o.length*2)".$b."{".$b."o[i/2]=null".$b."}".$b."f[".$form->EncodeJavascriptString($this->group)."].value=g;".$b;
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if(!$this->multiple)
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$javascript.="o[0].selected=true;".$b."a=s.options[ai=s.selectedIndex].value;".$b."if(bi>=0 && a!=b && s.onchange) s.onchange();".$b;
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$javascript.="}".$b;
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if($this->dynamic)
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$javascript.="else".$b."{".$b."setTimeout('".$this->switch_group."()',10)".$b."}".$b;
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$javascript.="}".$eol."// -->".$eol."</script>";
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if($this->dynamic)
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$javascript.="<iframe id=\"".$this->switch_group."_i\" width=\"0\" height=\"0\" frameborder=\"0\"></iframe>";
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if(strlen($error=$form->AddDataPart($javascript))==0
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&& strlen($error=$form->AddInputPart($this->select))==0)
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$error=$form->AddInputPart($this->group);
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return($error);
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}
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Function GetInputValue(&$form)
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{
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return($form->GetInputValue($this->select));
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}
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Function Connect(&$form, $to, $event, $action, &$context)
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{
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return($form->Connect($this->select, $to, $event, $action, $context));
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}
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Function GetJavascriptConnectionAction(&$form, $form_object, $from, $event, $action, &$context, &$javascript)
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{
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switch($action)
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{
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case "SwitchGroup":
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$property=(IsSet($context["GroupProperty"]) ? $context["GroupProperty"] : "VALUE");
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if(strcmp($property, "VALUE"))
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return("it is not supported to switch to a group defined by property ".$property);
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$value=$form->GetJavascriptInputValue($form_object, $from);
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if(strlen($value)==0)
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return("it was not possible to determine how to retrieve ".$property." value");
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if($this->dynamic)
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{
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if(strlen($error=$form->GetInputEventURL($this->input,"getoptions",array($this->group_parameter=>"GROUP"),$iframe_url)))
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return($error);
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$javascript="if(document.getElementById && (f=document.getElementById('".$this->switch_group."_i'))){g=".$value.";".$this->switch_group."_g=g;".$this->switch_group."_f=".$form_object.";".$this->switch_group."_n=null;"."g=escape(g);while((p=g.indexOf('+'))!=-1){g=g.substring(0,p)+'%2B'+g.substring(p+1,g.length)}f.src='".str_replace("GROUP", "'+g+'", $iframe_url)."';setTimeout('".$this->switch_group."()',10)}";
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}
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else
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$javascript=$this->switch_group."(".$value.",".$form_object.")";
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break;
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default:
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return($this->DefaultGetJavascriptConnectionAction($form, $form_object, $from, $event, $action, $context, $javascript));
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}
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return("");
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}
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Function LoadInputValues(&$form, $submitted)
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{
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$group=$form->GetInputValue($this->linked_input);
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$selected_group=$form->GetInputValue($this->group);
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$this->GetGroupOptions($options,$group);
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if(!IsSet($options)
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&& strcmp($group,$selected_group))
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{
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$group=$selected_group;
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$this->GetGroupOptions($options,$group);
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}
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if(IsSet($options))
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{
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if($this->multiple)
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{
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$selected=$form->GetInputValue($this->select);
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for($option=0; $option<count($selected); $option++)
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{
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if(!IsSet($options[$selected[$option]]))
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break;
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}
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if($option<count($selected))
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{
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$selected=array();
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$group=$this->selected_group;
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$this->GetGroupOptions($options,$group);
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}
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else
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$this->selected_group=$group;
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$form->SetSelectOptions($this->select, $options, $selected);
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}
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else
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{
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$option=$form->GetInputValue($this->select);
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if(IsSet($options[$option]))
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{
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$this->selected_group=$group;
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$form->SetSelectOptions($this->select, $options, array($option));
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}
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else
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{
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$this->GetGroupOptions($options,$this->selected_group);
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Reset($options);
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$option=Key($options);
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$form->SetInputValue($this->select, $option);
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}
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}
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}
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if(strcmp($group, $selected_group))
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$form->SetInputValue($this->group, $this->selected_group=$group);
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return('');
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}
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Function HandleEvent(&$form, $event, $parameters, &$processed)
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{
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switch($event)
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{
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case "getoptions":
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if($this->dynamic)
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{
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if(!IsSet($parameters[$this->group_parameter])
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&& GetType($parameters[$this->group_parameter])=="string")
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return("the group parameter is not being passed to the linked select input getoptions event handler");
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if(strlen($error=$this->GetGroupOptions($g,$parameters[$this->group_parameter])))
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return($error);
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$c=count($g);
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$v="";
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for($o=0;$o<$c;$o++)
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{
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if($o>0)
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$v.=",\n";
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$k=Key($g);
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$v.=$form->EncodeJavascriptString($g[$k]).",".$form->EncodeJavascriptString($k);
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Next($g);
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}
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Header("Content-Type: text/html");
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echo "<html><head><title>getoptions</title><script type=\"text/javascript\"><!--\nfunction l()\n{\nparent.".$this->switch_group."_n=[\n".$v."\n];\n}\n// -->\n</script></head><body onload=\"l()\"></body></html>";
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$processed=1;
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break;
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}
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default:
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return($this->DefaultHandleEvent($form,$event,$parameters,$processed));
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}
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return("");
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}
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Function GetInputProperty(&$form, $property, &$value)
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{
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switch($property)
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{
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case "SelectedOption":
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return($form->GetInputProperty($this->select, $property, $value));
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default:
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return($this->DefaultGetInputProperty($form, $property, $value));
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}
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}
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Function GetJavascriptInputValue(&$form, $form_object)
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{
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return($form->GetJavascriptInputValue($form_object, $this->select));
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}
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};
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?>
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