tv20.js

马士兵老师的代码

//=========================================
// 记录着树根
tv_topnodeitem = null ;
//=============================================================================
//数组，装着所有的节点
nodeitems = new Array() ;


nodeitem.prototype.show = nodeitem_show ;
nodeitem.prototype.refresh = nodeitem_refresh ;
nodeitem.prototype.boxclick = nodeitem_boxclick ;
nodeitem.prototype.close = nodeitem_close ;
nodeitem.prototype.open = nodeitem_open ;
nodeitem.prototype.remove = nodeitem_remove ;
nodeitem.prototype.setTag = nodeitem_setTag ;
nodeitem.prototype.getTag = nodeitem_getTag ;

function addNode(  parentkey , key , lable , img  )   {
    return new nodeitem( parentkey , key , lable , img ) ;
}
//===============================================
//定义一个类：nodeitem
//lable:文本
//key：键
//parent:
//subitems：数组，装着所有儿子
//
//
//
//status------------------------1:two-direction       0:nobox       0: disactivite
//                              2:three-0direction     1:close-box   1: activite
//                                                    2:open-box                    
//===============================================
function nodeitem( parentkey , key , lable , img )  {
    this.lable = lable ;
	this.key = key ;
    this.parent = findNode( parentkey ) ;
	//如果找到父亲
	if( this.parent != null )  {
	    aa = this.parent.status ;
	    if( aa.substring( 1 , 2 ) == "0" )
	        this.parent.status = aa.substring( 0 , 1 ) + "1" + aa.substring( 2 , 3 ) ;
	    if( this.parent.maxsubitem != null ) 
	        this.parent.maxsubitem.status = "2" + this.parent.maxsubitem.status.substring( 1 , 3 ) ;
        this.parent.subitems[ this.parent.subitems.length ] = this ;
        this.parent.maxsubitem = this ; 
    }
	//如果没找到父亲
    else  {
	    if( tv_topnodeitem != null )   {
		     alert( "不能有两个顶项!" ) ;
			 return ;
        }
        tv_topnodeitem = this ;
    }
		 
	this.img = img ;
	this.tag = null ;
    this.status = "100" ;
	this.subitems = new Array() ;
	//最后一个儿子
	this.maxsubitem = null ;
	//0
    this.id = nodeitemRegister( this ) ;

	//**********************
	//this.questionId = 0;
	//this.description = "";
	//this.url = null;
	//**********************
	
	//added by msb for the sort and move up/down
	/*if ( this == tv_topnodeitem )
	{
		this.nodeIndex = 0;
	} else {
		this.nodeIndex = this.parent.subitems.length;
	}*/
	//end added

}
//=============================================================================
//找到父亲
function findNode( key )   {
	pppp = null;
    for( i = 0 ; i < nodeitems.length ; i ++ ) {
	   if( nodeitems[ i ] != null ) {
	      if( nodeitems[ i ].key == key ) {
	         pppp = nodeitems[ i ] ;
		  }
	   }
	}
    return pppp ;
}
//注册一个nodeitem
function nodeitemRegister( obj )   {
    nodeitems[ nodeitems.length ] = obj ;
	return nodeitems.length - 1 ;
}
//=========================================
//Image List
//=========================================
treeview_box_0_none = "../images/4_clos.gif"  ;
treeview_box_0_line = "../images/4_none.gif" ;
treeview_box_2_open = "../images/2_open.gif" ;
treeview_box_2_none = "../images/2_none.gif" ;
treeview_box_2_close = "../images/2_clos.gif" ;
treeview_box_1_open = "../images/3_open.gif" ;
treeview_box_1_none = "../images/3_none.gif" ;
treeview_box_1_close = "../images/3_clos.gif" ;
//==========================================================
// 显示树
function showTV()  {
     tv_topnodeitem.show() ;
}
//类nodeitem的show方法
function nodeitem_show()  {
	
	str = "<span id = 'preface" + this.id + "'><table border='1' cellspacing='0' cellpadding='0'><tr><td>" ;
    str_f = "" ;
	//缩进
    for( j = this.parent ; j != null ; j = j.parent )  {
	    if( j.status.substring( 0 , 1 ) == 1 )
		    str_f = "<img src = '" + treeview_box_0_none + "' align='absmiddle' >" + str_f ;
        else
		    str_f = "<img src = '" + treeview_box_0_line + "' align='absmiddle' >" + str_f ;
    }
    str = str + str_f ;
	//根据状态头两位，判断向几个方向出头，判断是+号还是-号，
    str += "<img id = 'box" + this.id + "' nodeid = '" + this.id + "' src = '" ;
    switch( this.status.substring( 0 , 2 ) )   {
        case "10" : str += treeview_box_1_none ; break ;
        case "11" : str += treeview_box_1_close ; break ;
        case "12" : str += treeview_box_1_open ; break ;
        case "20" : str += treeview_box_2_none ; break ;
        case "21" : str += treeview_box_2_close ; break ;
        case "22" : str += treeview_box_2_open ; break ;
    }
    str += "' align='absmiddle' onclick='box_on_click(this)'>" ;
    if( this.img == "" )
	    str += this.img ;
    else
	    str += "<img src = '" + this.img + "' align='absmiddle' width='16' height='16'>" ;
    str += "</td><td><table border='0' cellspacing='1' cellpadding='1' style='font-size:9pt; color:#333333' id='lablePanel" + this.id + "'><tr><td ondblclick = 'lable_on_dblclick(" + this.id + ")' onclick='lable_on_click(" + this.id + ")' style='cursor:hand' id='f_lablePanel" + this.id + "' nowrap>" + this.lable + "</td></tr></table></td></tr></table>" ;  
	str += "</span><span id = 'tv_panel_" + this.id + "' style='display:" ;
	if( this.status.substring( 1 , 2 ) == '2' )
	   str += "" ;
	else
	   str += "none" ;
	 
    str += "'></span>" ;
	
	//显示出lai
	if( this.parent == null )  
  	   for(var i in document.all){
          if (document.all[i].tagName == "BODY")
          {
		      document.all[i].insertAdjacentHTML( "AfterBegin" , str ) ;
              break
          }
       }
	else   
	//如果有父亲，加到以父亲的id命名的以tv_panel_开头的span，快要结束的位置
	document.all( "tv_panel_" + this.parent.id ).insertAdjacentHTML( "BeforeEnd" , str ) ;
	
	//递归调用儿子们的show方法
    for(var m = 0 ; m < this.subitems.length ; m ++ ) {
		   if( this.subitems[ m ] != null )  {
			   this.subitems[ m ].show() ;
	   	 }
	  }
  	
    
}

//=============================================================================
//暂时没用
//=============================================================================



//========================================
//Envrionment to hold Listeners
//========================================
tv_listeners = new Array() ;
function listener( type , handler )   {
	this.type = type ;
	this.handler = handler ;
	this.id = tv_listeners.length ;
	tv_listeners[ tv_listeners.length ] = this ;
}

function addListener( type , handler )  {
    new listener( type , handler ) ;  
 }
//=== END =====


//===== END =======



//=== END =======

//=================================
//Custom a stack
//Class         : stack
//metheds    :  get()
//                    put( obj )
//=================================
function stack() {
    this.value = new Array() ;
	this.cursor = 0 ;
}

function stack_get()  {
     this.cursor = this.cursor - 1 ;
	 return this.value[ this.cursor ] ;
}

function stack_put( obj )   {
      this.value[ this.cursor ] = obj ;
      this.cursor = this.cursor + 1 ;
}

stack.prototype.get = stack_get ;
stack.prototype.put = stack_put ;
//=======END ==========

//=========================================
// Define a public stack
//=========================================
userstack = new stack() ;
//====== END ===========



//===============================================
//Class : nodeitem
//status------------------------1:two-direction       0:nobox       0: disactivite
//                              2:three-0direction     1:close-box   1: activite
//                                                    2:open-box                    
//===============================================
function nodeitem( parentkey , key , lable , img )  {
    this.lable = lable ;
	this.key = key ;
    this.parent = findNode( parentkey ) ;
	if( this.parent != null )  {
	    aa = this.parent.status ;
	    if( aa.substring( 1 , 2 ) == "0" )
	        this.parent.status = aa.substring( 0 , 1 ) + "1" + aa.substring( 2 , 3 ) ;
	    if( this.parent.maxsubitem != null ) 
	        this.parent.maxsubitem.status = "2" + this.parent.maxsubitem.status.substring( 1 , 3 ) ;
        this.parent.subitems[ this.parent.subitems.length ] = this ;
        this.parent.maxsubitem = this ; 
    }
    else  {
	    if( tv_topnodeitem != null )   {
		     alert( "不能有两个顶项!" ) ;
			 return ;
        }
        tv_topnodeitem = this ;
    }
		 
	this.img = img ;
	this.tag = null ;
    this.status = "100" ;
	this.subitems = new Array() ;
	this.maxsubitem = null ;
    this.id = nodeitemRegister( this ) ;

	//**********************
	//this.questionId = 0;
	//this.description = "";
	//this.url = null;
	//**********************