支持COOKIE保存的层拖动实例

2024-09-05 12:21:44

字体：大中小

来源：转载

供稿：网友

这个代码非常好，既然简单又实用，很多层拖动窗口都不支持用COOKIE保存拖动位置，下次打开后各个模块层全部都复位了，给用户造成很多麻烦，这款代码好就好在它可以将拖动数据保存在COOKIE中，只要不清空COOKIE，用户的拖动操作将会被保留，下次打开后会显示上次的拖动位置。这更加人性一点。

<html><head><title>拖拽+COOKIE保存</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><style>* {	font-size:12px}.dragTable {	font-size:12px;	border-top:1px solid #3366cc;	margin-bottom: 10px;	width:100%;	background-color:#FFFFFF;}.dragTR {	cursor:move;/*控制当鼠标移动到该行上时显示的样式*/	color:#7787cc;	background-color:#e5eef9;	font-size:16px;	font-family:"宋体";	font-weight:bold;	letter-spacing:1px;}/*利用tagName定义样式*/td {	vertical-align:top;}/*#表示对id=parentTable元素的样式定义*/#parentTable {	border-collapse:collapse;	letter-spacing:25px;}</style><script language ="JavaScript" type="text/javascript">//----设置Cookie------function setCookie(name,value,domain){var value = escape(value);var nameString = "Drag_"+name + "=" + value; //给cookie变量增加前缀var extime = new Date(); extime.setTime (extime.getTime () + 315360000);var expiryString = ";expires=" + extime.toGMTString();var domainString = "";var pathString = ";path=/"; var setvalue = nameString + expiryString;document.cookie = setvalue;}//----设置Cookie 结束------//---读取Cookie-------function getcookie (name) {var CookieFound = false;var start = 0;var end = 0;var CookieString = document.cookie;var i = 0;name="Drag_"+name; //增加前缀while (i <= CookieString.length) {start = i ;end = start + name.length;if (CookieString.substring(start, end) == name){CookieFound = true;break; }i++;}if (CookieFound){start = end + 1;end = CookieString.indexOf(";",start);if (end < start)end = CookieString.length;var getvalue = CookieString.substring(start, end);return unescape(getvalue);}return "";}//---读取Cookie 结束-------//检测是否禁用了cookiefunction isEnableCookie() { try {var cookie_helper = new CookieHelper("");var test_cookie_name = "test_cookie_name";var test_cookie_value = "test_cookie_value";var test_cookie_value_ret = "";cookie_helper.writeCookie(test_cookie_name,test_cookie_value);test_cookie_value_ret = cookie_helper.getCookieValue(test_cookie_name); if ( test_cookie_value_ret != null ) {cookie_helper.removeCookie(test_cookie_name);return true;} else { return false;} } catch (error) { return false;}}</script></head><body><table border="0" cellpadding="0" cellspacing="10" width="798" height="500" id="parentTable">  <tr >    <td width="266" valign="top"><table id ="st1" border="1" class="dragTable" cellspacing="0">        <tr>          <td>HomePage</td>        </tr>        <tr>          <td id="div1"></td>        </tr>      </table>      <table style="display:none" class="dragTable">        <tr>          <td></td>        </tr>      </table>      <table id="st2" border="1" class="dragTable" cellspacing="0">        <tr>          <td>Service</td>        </tr>        <tr>          <td id="div2"></td>        </tr>      </table></td>    <td width="266"><table id="st3" border="1" class="dragTable" cellspacing="0">        <tr>          <td>div3</td>        </tr>        <tr>          <td id="div3"></td>        </tr>      </table>      <table style="display:none" class="dragTable">        <tr>          <td></td>        </tr>      </table>      <table id="st4" border="1" class="dragTable" cellspacing="0">        <tr>          <td>div4</td>        </tr>        <tr>          <td id="div4" ></td>        </tr>      </table></td>    <td width="266"><table id="st5" border="1" class="dragTable" cellspacing="0">        <tr>          <td>Produce</td>        </tr>        <tr>          <td id="div5"></td>        </tr>      </table>      <table style="display:none" class="dragTable">        <tr>          <td></td>        </tr>      </table>      <table id="st6" border="1" class="dragTable" cellspacing="0">        <tr>          <td>About</td>        </tr>        <tr align="center">          <td id="div6"><table cellspacing="0" cellpadding="0" border="0" >              <tr>                <td align="center"></td>              </tr>            </table></td>        </tr>      </table>      <table style="display:none" class="dragTable" ID="Table1">        <tr>          <td></td>        </tr>      </table>      <table id="st7" border=1 class="dragTable" cellspacing="0">        <tr>          <td>div7</td>        </tr>        <tr>          <td id="div7"><table cellSpacing=0 cellPadding=0 width=260 border=0 ID="Table2">              <tr>                <td align="center"></td>              </tr>            </table></td>        </tr>      </table></td>  </tr></table><script language="javascript" defer><!--/*实现拖拽的代码*/ var draged=false;tdiv=null;function dragStart(){ao=event.srcElement; //设置或获取触发事件的对象,这里是可以移动的table对象的TD对象if((ao.tagName=="TD")||(ao.tagName=="TR"))ao=ao.offsetParent;//获取定义对象offsetTop和offsetLeft属性的容器对象的引用,这里是获取的被移动的table对象。else return;draged=true;tdiv=document.createElement("div");tdiv.innerHTML=ao.outerHTML;tdiv.style.display="block";tdiv.style.position="absolute";tdiv.style.filter="alpha(opacity=70)";tdiv.style.cursor="move";tdiv.style.width=ao.offsetWidth;//被移动table对象的高度tdiv.style.height=ao.offsetHeight;tdiv.style.top=getInfo(ao).top;tdiv.style.left=getInfo(ao).left;document.body.appendChild(tdiv);lastX=event.clientX;lastY=event.clientY;lastLeft=tdiv.style.left;lastTop=tdiv.style.top;try{ao.dragDrop(); //初始化拖曳事件}catch(e){}}function draging(){//重要:判断MOUSE的位置if(!draged)return;var tX=event.clientX;var tY=event.clientY;tdiv.style.left=parseInt(lastLeft)+tX-lastX;//tdiv.style.top=parseInt(lastTop)+tY-lastY;for(var i=0;i<parentTable.cells.length;i++){//for1var parentCell=getInfo(parentTable.cells[i]);if(tX>=parentCell.left&&tX<=parentCell.right&&tY>=parentCell.top&&tY<=parentCell.bottom)//判断鼠标的位置是否移动到父表的某个列中{//if1var subTables=parentTable.cells[i].getElementsByTagName("table");if(subTables.length==0)//如果鼠标所在的列中没有没有子表，直接增加子对象（table）{if(tX>=parentCell.left&&tX<=parentCell.right&&tY>=parentCell.top&&tY<=parentCell.bottom){parentTable.cells[i].appendChild(ao);}break;}for(var j=0;j<subTables.length;j++)//列中存在子表的处理{var subTable=getInfo(subTables[j]);if(tX>=subTable.left&&tX<=subTable.right&&tY>=subTable.top&&tY<=subTable.bottom){parentTable.cells[i].insertBefore(ao,subTables[j]);break;}else{parentTable.cells[i].appendChild(ao);} }}//if1}//for1}function dragEnd(){if(!draged)return;draged=false;//---save sub table position---var pttyle="";for(var i=0;i<parentTable.cells.length;i++){//for1var subTables=parentTable.cells[i].getElementsByTagName("table");if(subTables.length==0){pttyle+="|";break;}else{for(var j=0;j<subTables.length;j++)//列中存在子表的处理{if(subTables[j].className!="dragTable") continue; //这里仅仅对className==dragTable的表处理，排除组织页面中使用的tablepttyle+=subTables[j].id+","+subTables[j].rows[0].cells[0].innerText+":";}pttyle+="|";}}//for1setCookie("pttyle",pttyle,"");//---save sub table position end---mm=ff(150,15);//}function getInfo(o){//取得对象的绝对坐标var to=new Object();to.left=to.right=to.top=to.bottom=0;var twidth=o.offsetWidth;var theight=o.offsetHeight;while(o!=document.body){to.left+=o.offsetLeft;to.top+=o.offsetTop;o=o.offsetParent;}to.right=to.left+twidth;to.bottom=to.top+theight;return to;}function ff(aa,ab){//用于恢复位置，aa/ab其值越大恢复的速度越快var ac=parseInt(getInfo(tdiv).left);var ad=parseInt(getInfo(tdiv).top);var ae=(ac-getInfo(ao).left)/ab;var af=(ad-getInfo(ao).top)/ab;return setInterval(function(){if(ab<1){clearInterval(mm);tdiv.removeNode(true);ao=null;return}ab--;ac-=ae;ad-=af;tdiv.style.left=parseInt(ac)+"px";tdiv.style.top=parseInt(ad)+"px"},aa/ab)}function inint(){//初始化/*根据cookie组织父表*/var pttyle=getcookie("pttyle");if (pttyle.length>0){//*****获得父表中所有的子表对象***/var ctCount=0; //计数器var stObjects=new Array();//保存子表对象for(var i=0;i<parentTable.cells.length;i++){var subTables=parentTable.cells[i].getElementsByTagName("table");//获得子表 for(var j=0;j<subTables.length;j++){ stObjects[ctCount]=subTables[j];ctCount++; parentTable.cells[i].removeChild(subTables[j]); //删除列中的子表对象 }}//读取cookie中子表对象id var tempCells=pttyle.split("|");//因为格式为pttyle=stid,stt:stid,stt:|stid,stt:stid,stt:|//begin for2for(var i=0; i<tempCells.length-1;i++)//拆成数组时存在一个多余的元素，故循环减去1 {var tempSTs=tempCells[i].split(":"); for (var j=0;j<tempSTs.length-1;j++)//遍历子表信息,{ for(var n=0;n<stObjects.length;n++)//从子表对象数组中查询子表对象{if(tempSTs[j].indexOf(stObjects[n].id)!=-1)//id值存在{parentTable.cells[i].appendChild(stObjects[n]);break;} }}}//end for2 }//pttyle.length>0 End/*根据cookie组织父表结束*//*设置拖拽的样式和事件*/for(var i=0;i<parentTable.cells.length;i++){var subTables=parentTable.cells[i].getElementsByTagName("table");//获得子表for(var j=0;j<subTables.length;j++){if(subTables[j].className!="dragTable") continue;subTables[j].rows[0].className="dragTR";//给行添加表示可以移动的样式subTables[j].rows[0].attachEvent("onmousedown",dragStart);//将指定函数绑定到事件，以便每当该事件在对象上触发时都调用该函数subTables[j].attachEvent("ondrag",draging);//将draging函数邦定到进行拖曳操作时，在源对象上持续触发的事件。subTables[j].attachEvent("ondragend",dragEnd);//ondragend事件：当用户在拖曳操作结束后释放鼠标时在源对象上触发。}} /*设置拖拽的样式和事件结束*/}inint();</script></body></html>

上一篇：CSS中1px虚线边框的方法

下一篇：CSS+JS表格行选中变色并储存的效果代码