formbuild拖拽表单设计器

    formbuild拖拽表单设计器

表单设计器适用于OA系统、问卷调查系统、考试系统等系统，具体使用请前至官网API请点击 formbuild拖拽表单设计器 

    formbuild迭代几个功能

1.升级BootStrap3.0版本、代码DOM结构有所修改 
2.form.build.core.js源代码解读
3.新增复制源代码copyToClipboard.js功能、html格式化
4.新增单列预、两列预览功能(layer.ui 交互)
5.popover文本控件自定义属性

form.build.core.js源代码解读

/**
 * form.build.core.js 迭代修改
 * @Date 2017-4-23
 */
(function(){
  var LPB = window.LPB = window.LPB || {
   plugins:[],
   genSource:function(){
      var $temptxt = $("<div>").html($("#build").html());
      //scrubbbbbbb
      $($temptxt).find(".component").attr({"title": null,
        "data-original-title":null,
        "data-type": null,
        "data-content": null,
        "rel": null,
        "trigger":null,
        "style": null});
      $($temptxt).find(".valtype").attr("data-valtype", null).removeClass("valtype");
      $($temptxt).find(".component").removeClass("component");
      $($temptxt).find("form").attr({"id":  null, "style": null});
      $("#source").val($temptxt.html().replace(/
            /g,"
"));
    }

  };
   
   /* form_name 表单名称
    * active_component 是 class="component" 的DIV 
    * leipiplugins class="leipiplugins" 的控件
    */
    LPB.plugins['form_name'] = function (active_component,leipiplugins) {
      var plugins = 'form_name',popover = $(".popover");
      //右弹form  初始化值
      $(popover).find("#orgvalue").val($(leipiplugins).val());
      //右弹form  取消控件
      $(popover).delegate(".btn-danger", "click", function(e){
          e.preventDefault();
          active_component.popover("hide");
      });
      //右弹form  确定控件
      $(popover).delegate(".btn-info", "click", function(e){
          e.preventDefault();//阻止元素发生默认的行为(例如,当点击提交按钮时阻止对表单的提交)
          var inputs = $(popover).find("input");
          $.each(inputs, function(i,e){
              var attr_name = $(e).attr("id");//属性名称
              var attr_val = $("#"+attr_name).val();
              if(attr_name == 'orgvalue')
              {
                  $(leipiplugins).attr("value", attr_val);
                  active_component.find(".leipiplugins-orgvalue").text(attr_val);
              }
              active_component.popover("hide");
              LPB.genSource();//重置源代码
          });
      });

    }
})();

$(document).ready(function(){
	//源代码
  $("#navtab").delegate("#sourcetab", "click", function(e){
    LPB.genSource();
  });
  //表单控件鼠标事件   ①鼠标按下  ②鼠标移动 ③鼠标松开
  $("form").delegate(".component", "mousedown", function(md){
    $(".popover").remove();
    md.preventDefault();
    var tops = [],
        mouseX = md.pageX,
        mouseY = md.pageY,
        $temp,
        timeout,
        $this = $(this),
        type,
        delays = {
		main: 0,
		form: 120
	};	
    type = $this.closest('.form-horizontal').attr('id') === "components" ? "main" : "form";
    var delayed = setTimeout(function(){
    	//type 值决定$this（'.component')append时是clone 还是直接append
      if(type === "main"){
        $temp = $("<form class='form-horizontal' id='temp'></form>").append($this.clone());
      } else {
        if($this.attr("id") !== "legend"){
          $temp = $("<form class='form-horizontal' id='temp'></form>").append($this);
        }
      }
      $("body").append($temp);
      $temp.css({"position" : "absolute",
                 "top"      : mouseY - ($temp.height()/2) + "px",
                 "left"     : mouseX - ($temp.width()/2) + "px",
                 "opacity"  : "0.9"}).show();

      var half_box_height = ($temp.height()/2);
      var half_box_width = ($temp.width()/2);
      var $target = $("#target");
      var tar_pos = $target.position();
      var $target_component = $("#target .component");

      $(document).delegate("body", "mousemove", function(mm){
        var mm_mouseX = mm.pageX;
        var mm_mouseY = mm.pageY;
        $temp.css({
        	"top": mm_mouseY - half_box_height + "px",
          "left": mm_mouseX - half_box_width  + "px"
        });

        if ( mm_mouseX > tar_pos.left &&
          mm_mouseX < tar_pos.left + $target.width() + $temp.width()/2 &&
          mm_mouseY > tar_pos.top &&
          mm_mouseY < tar_pos.top + $target.height() + $temp.height()/2
          ){
            $("#target").css("background-color", "#fafdff");
            $target_component.css({"border-top" : "1px solid white", "border-bottom" : "none"});
            //jQuery过滤
            tops = $.grep($target_component, function(e){
              return ($(e).position().top -  mm_mouseY + half_box_height > 0 && $(e).attr("id") !== "legend");
            });
            if (tops.length > 0){
              $(tops[0]).css("border-top", "1px solid #22aaff");
            } else{
              if($target_component.length > 0){
                $($target_component[$target_component.length - 1]).css("border-bottom", "1px solid #22aaff");
              }
            }
          } else{
            $("#target").css("background-color", "#fff");
            $target_component.css({"border-top" : "1px solid white", "border-bottom" : "none"});
            $target.css("background-color", "#fff");
          }
      });

      $("body").delegate("#temp", "mouseup", function(mu){
        mu.preventDefault();

        var mu_mouseX = mu.pageX;
        var mu_mouseY = mu.pageY;
        var tar_pos = $target.position();

        $("#target .component").css({"border-top" : "1px solid white", "border-bottom" : "none"});

        // acting only if mouse is in right place
        if (mu_mouseX + half_box_width > tar_pos.left &&
          mu_mouseX - half_box_width < tar_pos.left + $target.width() &&
          mu_mouseY + half_box_height > tar_pos.top &&
          mu_mouseY - half_box_height < tar_pos.top + $target.height()
          ){
            $temp.attr("style", null);
            // where to add
            if(tops.length > 0){
              $($temp.html()).insertBefore(tops[0]);
            } else {
              $("#target fieldset").append($temp.append("

    ").html());
            }
          } else {
            // no add
            $("#target .component").css({"border-top" : "1px solid white", "border-bottom" : "none"});
            tops = [];
          }

        //clean up & add popover
        $target.css("background-color", "#fff");
        $(document).undelegate("body", "mousemove");
        $("body").undelegate("#temp","mouseup");
        $("#target .component").popover({trigger: "manual"});
        $temp.remove();
        LPB.genSource();
      });
    }, delays[type]);

    $(document).mouseup(function () {
      clearInterval(delayed);
      return false;
    });
    $(this).mouseout(function () {
      clearInterval(delayed);
      return false;
    });
  });

  //activate legend popover
  $("#target .component").popover({trigger: "manual"});
  //popover on click event
  $("#target").delegate(".component", "click", function(e){
    e.preventDefault();
    //$(".popover").hide();
    var active_component = $(this);
    active_component.popover("show");
    //class="leipiplugins"
    var leipiplugins = active_component.find(".leipiplugins"),
        plugins =$(leipiplugins).attr("leipiplugins");//leipiplugins="text"
      //exec plugins
      if(typeof(LPB.plugins[plugins]) =='function')
      {
        try{
            LPB.plugins[plugins](active_component,leipiplugins);
          }catch ( e ) {
            layer.alert('控件异常......');
          }
      }else
      {
          layer.alert("控件有误或不存在......");
      }

  });
});