JavaScript-Formularverarbeitung, spezifischer Implementierungscode (Formular, Link, Schaltfläche)_Javascript-Kenntnisse

Die Beispiele in diesem Artikel behandeln verschiedene Formulare sowie allgemeine Komponenten von Links und Schaltflächen und zeigen Ihnen, wie Sie die JavaScript-Formularverarbeitung bedienen. Der spezifische Inhalt ist wie folgt

/**
 * Generic Form processing js
 * @author Anthony.chen
 */
 
/**
 * Push button action [btn_action]data into form
 * If there is prescript , run the pre script
 */
"use strict";
//All ajax request are synchronized by default
var ajaxSynchronized = true;
//All ajax request will be unblock by default
var ajaxAutoUnblock = true;
 
var ajax_action_button = function (e){
 var btn = $(this);
 //Add prescript
 var pre_script;
 if(pre_script = btn.attr("pre_script")){
  var ret = eval(pre_script);
  if(ret==false){
   return false;
  }
 }
 var btn_action = btn.attr('value');
 if(btn_action){
  $(this).closest('form').data('btn_action',
   { name:'btn_action',value:btn_action }
   );
 }
};
 
/**
 * Update the extra form data in FormElement with Form element, Key and Value
 */
var ajax_update_post_data = function(formEle, k, v){
 var form = $(formEle);
 var post_data = form.data('post_data');
 if( post_data == undefined ){
  post_data = {};
 }
 
 if( v == undefined ){
  delete post_data[k];
 }else{
  post_data[k] = v;
 }
 form.data('post_data',post_data);
 return true;
};
 
/**
 * Bool Checkbox is special checkbox which needs to keep UNCHECK value 
 * And post with ajax form ,the form is in the parent
 */
var bool_checkbox = function(){
 var ipt = $(this);
 var formEle = ipt.closest("form");
 var _check = ipt.prop("checked");
 if(_check){
  ajax_update_post_data(formEle,ipt.attr('name'));
 }else{
  ajax_update_post_data(formEle,ipt.attr('name'),'f');
 }
};
 
/**
 * Init the spin number
 */
var spin_number = function(){
 var spin = $(this);
 var config = { 
  lock:true,
   imageBasePath: '{webpath}/css/images/spin/',
   btnCss: null,
   txtCss: null,
   btnClass:'spin_btn',
 };
 var interval = spin.attr('interval');
 if(interval){
  config.interval = interval;
 }else{
  config.interval = 1;
 }
 
 var min = spin.attr('min');
 if( min ){
  config.min = min;
 }
 
 var max = spin.attr('max');
 if( max ){
  config.max = max;
 }
 
 spin.spin(config);
 return true;
};
 
/**
 * Init the date input
 */
var date_input = function(){
 var ipt = $(this);
 var config = {
  offset:[4,0],
  selectors:true,
  lang: '{lang}',
  firstDay : 1,
  format: 'yyyy-mm-dd',
 };
  
 var min = ipt.attr('min');
 if( min ){
  config.min = min;
 }
 
 var min = ipt.attr('min');
 if( min ){
  config.min = min;
 }
 
 ipt.dateinput(config);
 return true;
};
 
 
/**
 * Init the timePicker
 */
var time_picker = function(){
 var ipt = $(this);
 var config = { };
 
 var step = ipt.attr("step");
 if( step ){
  config.step = step;
 }
 
 ipt.timePicker( config );
 return true;
};
 
/**
 * Generic Ajax Form post function
 * If btn_action is set, then add data into form
 * if returi is set, redirect to returi
 * if reload is set, reload 
 * else Show block message
 *
 * the form will be validated.
 */
var ajax_form_post = function(e){
 var form = $(this);
 var pre_script;
 if(pre_script = form.attr("pre_script")){
  var ret = eval(pre_script);
  if(ret==false){
   return false;
  }
 }
 var errHint = form.find(".formError").first();
 if(errHint.size() == 0){
  errHint = $("#pageError");
 }
 errHint.text('').hide();
 
 //Cleanup the pageError
 if(!e.isDefaultPrevented()){
  //Hide all .formError
  $.blockUI({ message:"{__('L_PROCESSING')}" });
  var formArray = form.serializeArray();
  var btn_action_data;
  var btn_action;
  if(btn_action_data = form.data('btn_action')){
   formArray.push(btn_action_data);
   form.removeData('btn_action');
   btn_action = btn_action_data.value;
  }else{
   btn_action = '';
  }
 
  console.log('btn action:'+btn_action);
  //Add extra Data
  var post_data;
  if(post_data = form.data('post_data')){
   for (var k in post_data ){
    //if post_data[k] is array,need more to do
    formArray.push( { name:k ,value: post_data[k] } );
   }
   form.removeData('post_data');
  }
   
  $.post(form.attr('action'), formArray,function(json){
    if($(window).data('blockUI.isBlocked') == 1){
     $.unblockUI();
    }
    if(json.code === true){
     var returi = "";
     var retData = "{__('L_PROCESSED')}!";
     if(json.data){
      retData = json.data; 
     }
 
     //TODO Add suppport to allow save and stay
     if(btn_action =='reqonly'){
      if(returi = form.attr('returi')){
       $(window).data('blockUI.returi',returi);
       ajaxAutoUnblock = false;
      }
      $.blockUI({ message:retData, css:{ cursor:'pointer',padding:'4px',border:'3px solid #CC0000',}, overlayCSS:{ cursor:'pointer' } });
      $(".blockUI").addClass("blockwarn");
     } //if there is returi set, then return to uri
     else if(returi = form.attr('returi')){
      window.location = returi;
     //Else if reload is set, then will be reload
     }else if(form.attr('reload')!=undefined){
      window.location.reload();
     }else{
      $.blockUI({ message:retData });
      $.unblockUI();
     }
    }
    else{
     if(typeof (json.data.errmsg) == 'string'){
      errHint.html(json.data).show();
      //$.blockUI({ message:json.data, css:{ cursor:'pointer',padding:'4px',border:'3px solid #CC0000',}, overlayCSS:{ cursor:'pointer' } });
      //$(".blockUI").addClass("blockwarn");
     }else{
      errHint.html("{Html::text(__('E_FORM'))}").show();
      for(var p in json.data){
       var msg = json.data[p];
       //Process hidden value,None hidden input should has refid refered to hidden value
       //Showing the Server message to ref 
       var ele = form.find("[type=hidden][name="+p+"]");
       if(ele.length){
        delete json.data.p;
        refid = ele.attr("id");
        refname = form.find("[hidden-id="+refid+"]").attr("name");
        json.data[refname]=+msg;
       }
 
       //Muti checkbox 
       var ele = form.find("[type=checkbox][name='"+p+"[]']");
       if(ele.length){
        delete json.data.p;
        refname = p+'[]';
        json.data[refname]=+msg;
       }
       //@END
      }
     }
     /*
      * Checking the hidden values 
      */
     form.data("validator").invalidate(json.data);
    } },'json');
    e.preventDefault();
 }else{
  errHint.html("{Html::text(__('E_FORM'))}").show();
 }
};
 
/***
 * Reset the input
 */
var ajax_post_form_hidden = function(){ 
  var form = $(this);
 
  form.find("[hidden-id]").each(function(){
   //Clear the message of Reference 
   var input = $(this);
   var refid = input.attr("hidden-id");
   var field = $("#" + refid + ""); 
   //Setup the clear of Errmsg
   //Monitor the change event on ID element, remove error message 
   //of Real input
   field.change(function(){ 
    //Hidden input
    var hinput = $(this);
    //real input
    var rinput = $("[hidden-id="+hinput.attr("id")+"]").first();
    form.data('validator').reset(rinput)
    });
   });
  };
 
var validate_hidden_id = function(input) {
 var refid = input.attr("hidden-id");
 var field = $("#" + refid + ""); 
 var msg = field.attr('msg');
 if( !msg ){
  msg = "{__('E_NOT_EMPTY')}";
 }
 
 return field.val() ? true : msg; 
};
 
var data_equals_validate = function(input) {
 var field;
 var name = input.attr("data-equals");
 field = this.getInputs().filter("[name=" + name + "]");
 return input.val() == field.val() ? true : [name];
};
 
/**
 * Ajax request through link
 * If confirm is set, confirm before send request
 * Support returi and reload
 * Else show block message
 */
var ajax_link_req = function(){
 var l = $(this);
 var hint = l.attr('hint');
 if(hint){
  var errHint = $(l.attr('hint'));
  errHint.text('').hide();
 }
 //If the confirm message is set, then should be confirmed from client
 if(l.attr('confirm')){
  if(!confirm(l.attr('confirm'))){
   return false;
  }
 }
 
 $.blockUI({ message:"{__('L_PROCESSING')}" });
 
 var pre_script;
 if(pre_script = l.attr("pre_script")){
  var ret = eval(pre_script);
  if(ret==false){
   return false;
  }
 }
 
 var block = l.attr('block');
 if(block != undefined){
  ajaxAutoUnblock = false ;
 }
 
 $.get(l.attr('href'),function(json){
   if(json.code == true){
    var retData = "{__('L_PROCESSED')}!";
    var returi;
    //If success to execute funtion for each
    var successFunc = l.attr('success');
    if(successFunc){
     l.each(window[successFunc]);
    }
 
    if(json.data){
     retData = json.data; 
    }
    //IF Require warning before
    if( l.attr('value') == 'reqonly'){
     alert(retData);
    }else if(returi = l.attr('returi')){
     window.location = returi;
    }
    else if(l.attr('reload')!=undefined){
     window.location.reload();
    }
    else{
     $.blockUI({ message:retData, css:{ cursor:'pointer',padding:'4px',border:'3px solid #CC0000',}, overlayCSS:{ cursor:'pointer' } });
     $(".blockUI").addClass("blockwarn");
    }
   }else{
    //$.unblockUI();
    //Only could support Text errmsg
    if(hint){
     errHint.text(json.data).show();
    }else{
     alert(json.data);
    }
   }},'json');
 return false;
};
 
/**
 * Supporting the button base navigation
 * Only jump to new href
 */
var btn_nav = function(){
 var input = $(this);
 var href = input.attr("href");
 if(href){
  window.location = href;
 }else{
  alert("Href not set");
 }
 return false;
};
 
/**
 * Support button base Ajax get method request
 * support returi and reload
 */
var btn_req = function(){
 var input = $(this);
 var href = input.attr("href");
 
 var hint = input.attr('hint');
 if(hint){
  var errHint = $(hint).first();
  if(errHint.size() == 0){
   errHint = $("#pageError");
  }
  errHint.text('').hide();
 }
 
 var block = input.attr('block');
 if(block != undefined){
  ajaxAutoUnblock = false
 }
 
 $.get(href,function(json){
   if(json.code == true){
   var returi;
   if(returi = input.attr('returi')){
    window.location = returi;
   }
   else if(input.attr("reload")!=undefined){
    window.location.reload();
   }else{
     var retData = "{__('L_PROCESSED')}!";
     if(json.data){
      retData = json.data; 
     }
     $.blockUI({ message:retData,css:{ cursor:'pointer' },overlayCSS:{ cursor:'pointer' } });
    }
   }else{
    if(hint){
     $.unblockUI();
     errHint.html(json.data.errmsg).show();
    }else{
     $.blockUI({ message:json.data.errmsg, css:{ cursor:'pointer',padding:'4px',border:'3px solid #CC0000',}, overlayCSS:{ cursor:'pointer' } });
     $(".blockUI").addClass("blockwarn");
    }
   }
   },'json');
 return false;
};
 
 
 
/**
 * Generic Ajax Checkbox
 * The default action is prevented and submit real request through URL
 */
var ajax_checkbox = function(){
 event.preventDefault();
 var action = $(this);
 var url = action.attr('url');
 var _check = action.prop("checked");
 console.log(_check);
 var op ; 
 if(_check){
  op = "1";
 }else{
  op = "0";
 }
 $.get(url + op ,function(json){
  if(json.code == true){
    if(_check){
     action.prop("checked",true);
    }else{
     action.prop("checked",false);
    }
    return true;
   }else{
    return false;
   }
 },'json');
};
 
 
/**
 * Crete Root picklist 
 */
var picklistinit = function(){
 var _select = $(this);
 var _hidden_id = _select.attr('hidden-id');
 var _un = _select.attr('un');
 var _lovchildren = _select.data('lovtree').c;
 var _rowvalue = _select.data('rowvalue');
 
 $("<OPTION>").append("{__('L_SELECT')}").appendTo(_select);
 for(var _kid in _lovchildren){
  var _lov = _lovchildren[_kid]['lov'];
  $("<OPTION>").val(_lov.lov_id).append(_lov.v).attr('k',_lov.id).attr('is_leaf',_lov.is_leaf).appendTo(_select);
 }
 _select.change(picklistchange);
 
 //Select the list
 if(_rowvalue){
  _select.find("[value="+_rowvalue[0]+"]").prop("selected",true);
  _select.change();
 }
 return true;
};
 
/**
 * Select pick list
 */
var picklistchange = function (){
 var _select = $(this);
 var _hidden_id = _select.attr('hidden-id');
 var _un = _select.attr('un');
 
 //Remove all the subsequent 
 var _lovtree = _select.data('lovtree');
 var _rowvalue = _select.data('rowvalue');
 
 _select.nextAll().remove();
 
 //This is value of Current Select
 var _selected = _select.find(':selected');
 if(_selected.attr('is_leaf')=="{DB::T}"){
  $("#"+_hidden_id).val(_select.val());
  _select.after("<img src='/s.gif' class='sprite_global successimg'/>");
 }else{
  var _val = _select.val();
  var _k = _selected.attr('k');
 
  //Getting Children list
  if(_lovtree.c[_k].c == undefined){
   return false;
  }
  var _c_lovtree = _lovtree.c[_k];
 
  var _c_select = $('<SELECT>').data('lovtree',_c_lovtree).
   data('rowvalue',_rowvalue).
   attr('hidden-id',_hidden_id).attr('un',_un).
   attr('name',_un+'_'+_k);
  $("<OPTION>").append("{__('L_SELECT')}").appendTo(_c_select);
  //Building the option list
  for(var _kid in _c_lovtree.c){
   var _lov = _c_lovtree.c[_kid]['lov'];
   $("<OPTION>").val(_lov.lov_id).append(_lov.v).attr('k',_lov.id).attr('is_leaf',_lov.is_leaf).appendTo(_c_select);
   //Insert after
   _select.after(_c_select);
   //Onchange
  }
  _c_select.change(picklistchange);
 
  if(_rowvalue){
   _c_select.find("[value="+_rowvalue[_k]+"]").prop("selected",true);
   _c_select.change();
  }
 }
};
 
 
 
var lookup_new = function(){
 var lookup = $(this);
 var pre_script;
 if(pre_script = lookup.attr("pre_script")){
  var ret = eval(pre_script);
  if(ret==false){
   return false;
  }
 }
 var url = lookup.attr("url");
 if(!url){
  alert('url not set');
  return false;
 }
 var height = lookup.attr('h');
 if(!height){
  height = 600;
 }
 var width = lookup.attr('w');
 if(!width){
  width = 800;
 }
 window.open(url,"pselect","scrollbars=yes,menubar=no,height="+height+",width="+width+",resizable=yes,toolbar=no,location=no,status=no");
 return false;
};
 
/**
 * Lookup new value for hidden value
 */
var parent_lookup = function(){
 var lookup = $(this);
 var pid = opener.$("#" + lookup.attr('pid'));
 if(!pid.length){
  alert(lookup.attr('pid')+ " not found");
  return false;
 }
 var pname = opener.$( "#" + lookup.attr('pname'));
 if(!pname.length){
  alert(lookup.attr('pname')+ " not found");
  return false;
 }
 
 var aft_script;
 //Run current after script
 if(aft_script = lookup.attr('aft_script')){
  window.eval(aft_script);
 }
 
 pid.val($(this).attr("refid")); 
 //Only operation from opener could trigger change event
 pid.change();
 pname.val($(this).attr("refvalue")); 
 pname.change();
 //Parent after_script
 if(aft_script = pname.attr('aft_script')){
  opener.window.eval(aft_script);
 }
 if(aft_script = pid.attr('aft_script')){
  opener.window.eval(aft_script);
 }
 window.close();
};
 
/**
 * Default upload complete
 */
//var uploadComplete = function(event, id, fileName, responseJSON) { 
var uploadComplete = function(e, data) { 
 //To be replaced by jquery uploader
 var _fileUpload = $(this);
 //console.log(_fileUpload);
 //console.log(data.result);
 if(_fileUpload.attr('reload')!=undefined){
  window.location.reload();
 }
};
 
/**
 * File upload function ,the following attribute to control action of upload
 * 'endpoint' as upload url
 * 'sid' as session id
 * 'complete' optional to configure the custom upload complete function
 */
var genericUpload = function(dom){
 var endpointurl = $(this).attr('endpoint');
 var sid = $(this).attr("sid");
 var completeFunc = 'uploadComplete';
 //Setup custome complete function
 var cusComplete = $(this).attr('complete');
 if(cusComplete){
  completeFunc = cusComplete;
 }
 
 $(this).fileupload({
  url: endpointurl,
  autoUpload:true,
  dataType:'json',
  formData: [{ 'sessionid': sid }],
  paramName: 'Filedata',
 }).bind('fileuploaddone',window[completeFunc]);
};
 
/**
 * Matched errors with input 
 * Only matched errors could be identified here
 */
var advance_validate = function(errors, event) {
 var conf = this.getConf();
 // loop errors
 $.each(errors, function(index, error) {
   // add error class into input Dom element
   var input = error.input;     
 
   input.addClass(conf.errorClass);
 
   // get handle to the error container
   var msg = input.data("msg.el"); 
 
   // create Error data if not present, and add error class for input
   // "msg.el" data is linked to error message Dom Element
   if (!msg) { 
   //msg = $(conf.message).addClass(conf.messageClass).insertAfter(input);
   msg = $(conf.message).addClass(conf.messageClass).appendTo(input.parent());
   input.data("msg.el", msg);
   } 
 
   // clear the container 
   msg.css({visibility: 'hidden'}).find("span").remove();
 
   // populate messages
   $.each(error.messages, function(i, m) { 
     $("<span/>").html(m).appendTo(msg);   
     });
 
   // make sure the width is not full body width so it can be positioned correctly
   if (msg.outerWidth() == msg.parent().width()) {
    msg.add(msg.find("span"));  
   } 
 
   //insert into correct position (relative to the field)
 
   msg.css({ visibility: 'visible'}) .fadeIn(conf.speed);  
   msg.parent().addClass("colError");
 });
};
 
var advance_inputs = function(inputs) {
 var conf = this.getConf();    
 inputs.removeClass(conf.errorClass).each(function() {
   var msg = $(this).data("msg.el");
   if (msg) {
   msg.hide();
   msg.parent().removeClass("colError");
   }
   });
 if($(".colError").size() == 0){ 
  var form = $(this);
  var errHint = form.find(".formError").first();
  if(errHint.size() == 0){
   errHint = $("#pageError");
   errHint.text('').hide();
  }
 }
};
 
/**
 * When refname is contained to be selected
 */
var checkall = function() { 
 var check = $(this);
 var refname = check.attr('refname');
 if(refname){
  if(check.prop("checked")){
   $("input[name*='"+refname+"']").prop("checked",true);
  }else{
   $("input[name*='"+refname+"']").prop("checked",false);
  }
 }
 
 var refclass = check.attr('refclass');
 if(refclass){
  if(check.prop("checked")){
   $("input."+refclass).prop("checked",true);
  }else{
   $("input."+refclass).prop("checked",false);
  }
 }
};
 
/**
 * Setup readonly checkbox 
 */
var readonlyCheck = function(e){
 e.preventDefault(); 
 return false;
};
 
/**
 * Select List disable
 */
var readonlySelect = function(){
 $(this).prop("disabled", true); 
};
 
 
$(document).ready(function() {
  $(document).ajaxStart(function(){
   //Clean up the Ajax request Page Level Error
   $("#pageError").text('').hide();
   //Clean up teh Form Error
   $(".formError").text('').hide();
   //Blocking all ajax processing
   if(ajaxSynchronized){
    $.blockUI({ message:"{__('L_PROCESSING')}" });
    }
   });
  $(document).ajaxStop(function(){
   if(ajaxSynchronized){
    if($(window).data('blockUI.isBlocked') == 1){
     if(ajaxAutoUnblock){
      $.unblockUI();
     }else{
      ajaxAutoUnblock = true;
     }
    }
   }else{//Change back to default Synchronized mode from Async
    ajaxAutoUnblock = true;
    ajaxSynchronized = true;
   }
   });
  $(document).ajaxError(function(event, request, settings){
   alert('Ajax Request Error! URL='+settings.url);
   if(ajaxSynchronized){
    if($(window).data('blockUI.isBlocked') == 1){
     if(ajaxAutoUnblock){
      $.unblockUI();
     }else{
      ajaxAutoUnblock = true;
     }
    }
   }else{
    ajaxAutoUnblock = true;
    ajaxSynchronized = true;
   }
   });
 
  //Force unblockUI
  $(document).click(function(){
    if($(window).data('blockUI.isBlocked') == 1){
     $.unblockUI();
     var returi = $(window).data('blockUI.returi');
     if(returi){
      window.location = returi;
     }
    }});
 
  $.tools.validator.addEffect("advanced", advance_validate,advance_inputs);
  $.tools.validator.fn("[data-equals]", { "{lang}":"{__('E_NOTEQUAL')}" }, data_equals_validate );
  $.tools.validator.fn("[hidden-id]",validate_hidden_id);
 
  $(".ajax_form_post").validator({ lang:'{lang}',effect:'advanced' }) .submit( ajax_form_post );
  $(".ajax_form_post").each(ajax_post_form_hidden);
  $(".spin_number").each(spin_number);
  $(".date_input").each(date_input);
  $(".time_picker").each(time_picker);
 
  $('.ajax_link_req').click(ajax_link_req);
  //Client validation for the hidden ID 
  $(".require_validate").validator({ lang:'{lang}',effect:'advanced' });
 
  $(".btn_nav").click( btn_nav );
  $(".btn_req").click( btn_req );
  $("button.btn_action").click(ajax_action_button);
  $(".lookup_new").click(lookup_new);
  $(".parent_lookup").click(parent_lookup);
  $(".ajax_checkbox").click(ajax_checkbox);
  $(".bool_checkbox").click(bool_checkbox);
  $(".checkall").click(checkall);
  $("img[rel]").overlay();
  $("input[tip]").tooltip({ position:"center right"});
 
  //At last we will do localize
  $.tools.validator.localize("{lang}", {
   '*'  : "{__('E_ALL')}",
   ':email' : "{__('E_EMAIL')}",
   ':number' : "{__('E_DECIMAL')}",
   ':url'  : "{__('E_URL')}",
   '[max]'  : "{__('E_MAX_LENGTH')}",
   '[min]'  : "{__('E_MIN_LENGTH')}",
   '[required]' : "{__('E_NOT_EMPTY')}",
   });
});

Das Obige ist der gesamte Inhalt dieses Artikels. Ich hoffe, dass er allen bei der Beherrschung von JavaScript-Formularverarbeitungsvorgängen hilfreich sein wird.