也发个JavaScript 拖拽布局的代码. 带编辑功能..

zoukankan html css js c++ java

也发个JavaScript 拖拽布局的代码. 带编辑功能..

前段时间有个客户说要做个像bbc一样可以拖拽布局和编辑功能的网站。公司就让我做了个Demo,基本实现了这些功能。新闻中心窗口可以编辑,不过数据是静态的，还没加Ajax。目前只在IE6 和FF2.0下测试过，其他浏览器还不知道。

事件格式化函数.书上的代码。

// JavaScript Document
//事件格式化函数，摘自JavaScript高级程序一书 p258

var EventUtil = new Object;

EventUtil.addEventHandler = function(oTarget, sEventType, fnHandler){
    if( oTarget.addEventListener){
        oTarget.addEventListener(sEventType, fnHandler, false);
    }else if( oTarget.attachEvent ){
        oTarget.attachEvent("on" + sEventType, fnHandler);
    }else{
        oTarget["on" + sEventType] = fnHandler;
    }
};

EventUtil.removeEventHandler = function(oTarget, sEventType, fnHandler){
    if( oTarget.removeEventListener){
        oTarget.removeEventListener(sEventType, fnHandler, false);
    }else if( oTarget.detachEvent ){
        oTarget.detachEvent("on" + sEventType, fnHandler);
    }else{
        oTarget["on" + sEventType] = null;
    }
};

EventUtil.formatEvent = function(oEvent){
    if(document.all){
        oEvent.charCode = ( oEvent.type == "keypress" ) ? oEvent.keyCode : 0;
        oEvent.eventPhase = 2;
        oEvent.isChar = ( oEvent.charCode > 0 );
        oEvent.pageX = oEvent.clientX + document.body.scrollLeft;
        oEvent.pageY = oEvent.clientY + document.body.scrollTop;
        oEvent.preventDefault = function(){
            this.returnValue = false;
        };

        if( oEvent.type == "mouseout" ){
            oEvent.relatedTarget = oEvent.toElement;
        }else if( oEvent.type == "mouseover" ){
            oEvent.relatedTarget = oEvent.fromElement;
        }

        oEvent.stopPropagation = function(){
            this.cancelBubble = true;
        };

        oEvent.target = oEvent.srcElement;
        oEvent.time = (new Date()).getTime();
    }

    return oEvent;
};

EventUtil.getEvent = function(){
    if( window.event ){
        return this.formatEvent(window.event);
    }
    else{
        return EventUtil.getEvent.caller.arguments[0];
    }
};

页面代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Drag Drop Demo</title>
<script type="text/javascript" src="js/eventutil.js"></script>
<style type="text/css">
    html, body{}{
        font-size:12px; margin:0px; padding:0px; color:#333333;
    }
    a{}{color:#555; text-decoration:none;}
    a:hover{}{color:#FFaa00;}

    .page{}{width:1000px; border:0px solid #F8F8F8;}
    .header{}{width:100%;border:1px solid #008000; height:40px; text-align:center; margin-bottom:20px;}
    .footer{}{width:100%;border:1px solid #008000; height:40px; text-align:center; clear:both;}
    .content{}{width:920px; border:0px solid #009000; height:500px; margin:auto;}
    #dragHelper{}{border:1px dashed #FF0000;position:relative; display:none;
        filter:alpha(opacity=40); -moz-opacity:0.4;
    }

    .left{}{ width:600px; float:left;}

    .left .focus{}{
        width:600px; border:1px solid #004578; height:100px;
        float:left; overflow:auto; margin-bottom:10px;
    }
    .left .container1{}{
        width:290px; border:0px solid #004578;
         height:auto; min-height:100px; float:left;
    }
    .left .container2{}{
        width:290px;  border:0px solid #004578;
        height:auto; min-height:100px; float:right;
    }
    .content .container3{}{
        width:290px; border:0px solid #000090;
        height:auto; min-height:100px; float:right;
    }
    .box {}{
        position:relative; width:100%; height:116px;
    }
    .fwwin{}{
        border:1px solid #76c2eb;
    }
    .fwwinDrag{}{
        border:1px dashed #76c2eb; height:100px;
        filter: alpha(opacity=50); -moz-opacity:0.5;
    }
    .fwwin .title{}{
        background:#d4eeff;
        filter: progid:DXImageTransform.Microsoft.gradient(startcolorstr=#d4eeff,endcolorstr=#fcfdff,gradientType=0);
        height:26px;
        border-bottom:1px solid #76c2eb;
    }
    .fwwin .title .text{}{
        float:left; width:80%; cursor:move; height:100%;
        line-height:25px; padding-left:10px;
    }
    .fwwin .title .button{}{
        width:15%; float:right; cursor:pointer;
        line-height:25px;
    }
    .fwwin .editor{}{
        display:none; width:100%; background:#EEEEEE;
    }
    .fwwin .body{}{
        background:#F8F8F8; height:62px;
        padding:5px;
    }
    .box .message{}{
        display:none; width:100%;
    }
    .box .message table{}{
        border:0px solid #DEDEDE;
    }
    .box .space{}{
        height:15px;
    }
</style>
<script type="text/javascript">
function Rect(){
    this.left = 0;
    this.top = 0;
    this.width = 0;
    this.height = 0;
}
Rect.prototype = {
    getObjPos : function(e){
        this.top=e.offsetTop;
        this.left=e.offsetLeft;
        this.width=e.offsetWidth;
        this.height=e.offsetHeight;
        while(e=e.offsetParent){
            this.top += e.offsetTop;
            this.left += e.offsetLeft;
        }
    },
    isInRect : function(x, y, obj){
        this.getObjPos(obj);
        if(x < this.left || x > this.left+this.width || y < this.top || y > this.top+this.height){
            return 0;
        }else if(y - this.top > this.height /2){
            return 1;
        }else{
            return 2;
        }
    },
    toString : function(){
        var str = "{ left : " + this.left + ",";
        str += "top : " + this.top + ",";
        str += "width : " + this.width + ",";
        str += "height : " + this.height + "}";
        return str;
    }
};
var dragObj = {};
var editObj = {};
var rect = new Rect();

function debug(str){
    $("debug").innerHTML += str + "<br>";
    $("debug").scrollTop += 50;
}
function initObject(){
    String.prototype.inc=function(s){return this.indexOf(s)>-1?true:false};
    var agent=navigator.userAgent ;
    window.isOpr=agent.inc("Opera") ;
    window.isIE=agent.inc("IE")&&!isOpr ;
    window.isMoz=agent.inc("Mozilla")&&!isOpr&&!isIE ;
    window.$=function(obj){return typeof(obj)=="string"?document.getElementById(obj):obj} ;
    window.oDel=function(obj){if($(obj)!=null && $(obj).parentNode){$(obj).parentNode.removeChild($(obj))}} ;
    window.getElementsByClassName = function(className, parentElement){
        var elems = ($(parentElement)||document.body).getElementsByTagName("*");
        var result=[];
        for (i=0; j=elems[i]; i++){
           if ((" "+j.className+" ").indexOf(" "+className+" ")!=-1){
                result.push(j);
           }
        }
        return result;
    }
}
function initEvent(){
    var content, tmpObj;
    dragObj.wndCount = 0;
    dragObj.wnds = new Array();

    content = $("content").getElementsByTagName("div");
    for(var i=0; i<content.length; i++){
        if(content[i].className == "text"){
            content[i].onmousedown = onMouseDown;
        }else if(content[i].className == "button"){
            content[i].onclick = onClick;
        }else if(content[i].className == "box"){
            dragObj.wnds.push(content[i]);
            dragObj.wndCount++;
        }
    }

    //container
    dragObj.cons = new Array();
    dragObj.cons[0] = $("con1");
    dragObj.cons[1] = $("con2");
    dragObj.cons[2] = $("con3");
    if(isIE){
        for(i=0; i<3; i++)
            dragObj.cons[i].style.height = "100px";
    }
}
function initDragObject(){
    dragObj.isMouseDown = false;
    dragObj.o = null;
    dragObj.gh = $("dragHelper");

    dragObj.x = 0;
    dragObj.y = 0;
}
function initEditObject(){
    editObj.isShow = false;
    editObj.o = null;
}

function startDrag(){
    dragObj.gh.style.width = dragObj.o.offsetWidth - 2 + "px";
    dragObj.gh.style.height = dragObj.o.offsetHeight - 2 + "px";
    dragObj.gh.realheight = dragObj.o.offsetHeight;
    dragObj.gh.style.display = "block";
    dragObj.o.parentNode.insertBefore(dragObj.gh, dragObj.o);

    rect.getObjPos(dragObj.o);
    dragObj.o.style.position = "absolute";
    dragObj.o.style.left = rect.left + 2 + "px";
    dragObj.o.style.top = rect.top - rect.height + 2 + "px";
    dragObj.o.style.width = rect.width + "px";
    dragObj.o.style.height = rect.height + "px";
    document.body.appendChild(dragObj.o);
}

function onMouseDown(e){
    if(!dragObj.isMouseDown){
        e = EventUtil.getEvent(e);
        dragObj.isMouseDown = true;
        dragObj.o = e.target.parentNode.parentNode.parentNode;
        dragObj.o.style.filter = "alpha(opacity=50)";
        dragObj.o.style.MozOpacity = 0.5;

        startDrag();

        dragObj.x = e.pageX;
        dragObj.y = e.pageY;

        //
        //debug("onMouseDown:" + dragObj.o.id)
    }
}
function onMouseMove(e){
    if(dragObj.isMouseDown && dragObj.o){
        e = EventUtil.getEvent(e);
        var left, top, wid, hei;
        wid = e.pageX - dragObj.x;
        hei = e.pageY - dragObj.y;
        left = parseInt(dragObj.o.style.left) + wid;
        top = parseInt(dragObj.o.style.top) + hei;

        dragObj.o.style.left = left + "px";
        dragObj.o.style.top = top + "px";

        dragObj.x = e.pageX;
        dragObj.y = e.pageY;

        //
        var tmp = null, obj;
        for(var i=0; i< dragObj.wndCount; i++){
            obj = dragObj.wnds[i];
            if(dragObj.o == obj) {
                continue;
            }
            ret = rect.isInRect(dragObj.x, dragObj.y, obj);
            if(ret == 1){ //down
                tmp = obj.nextSibling;
                if(tmp == null){
                    obj.parentNode.appendChild(dragObj.gh);
                    //
                    //debug("onMouseMove: ->down ->appendchild ->" + obj.id);
                }else if(tmp != dragObj.gh && tmp.parentNode == obj.parentNode){
                    try{
                        obj.parentNode.insertBefore(dragObj.gh, tmp);
                        //
                        //debug("onMouseMove: ->down ->insertBefore ->" + tmp.id);
                    }catch(e){}
                }
                return;
            }else if(ret == 2){ //up
                tmp = dragObj.gh.nextSibling;
                if(tmp == obj) return;
                obj.parentNode.insertBefore(dragObj.gh, obj);
                //
                //debug("onMouseMove: ->up ->insertBefore ->" + obj.id );//+ "-tmpid" + tmp.id);
                return;
            }
        }
        //con
        for(var i=0; i<dragObj.cons.length; i++){
            obj = dragObj.cons[i];
            ret = rect.isInRect(dragObj.x, dragObj.y, obj);
            if(ret > 0 && dragObj.gh.parentNode != obj){
                wins = getElementsByClassName("box", obj);
                if(wins.length == 0){
                    obj.appendChild(dragObj.gh);
                    //
                    //debug("onMouseMove: ->down ->container.appendchild ->" + obj.id);
                    return;
                }
            }
        }// end for
    }
}
function onMouseUp(e){
    dragObj.isMouseDown = false;
    if(dragObj.o){
        dragObj.o.style.cssText = "";
        dragObj.o.className = "box";
        dragObj.o.style.height = dragObj.gh.realheight + "px";
        dragObj.gh.parentNode.insertBefore(dragObj.o, dragObj.gh);
        dragObj.o = null;
    }
    oDel(dragObj.gh);
}

function onClick(e){
    var obj, btn, edit;
    e = EventUtil.getEvent(e);
    btn = e.target;
    obj = btn.parentNode.parentNode.parentNode;

    edits = getElementsByClassName("editor", obj);
    if(edits.length >=1 ){
        showEditor(edits[0]);
        resetPara(edits[0]);
    }
    /**//*if(obj.id != "win22"){
        oDel(obj);
        return;
    }*/
}

window.onload = function(){
    initObject();
    initEvent();
    initDragObject();
    initEditObject();
};
document.onmousemove = onMouseMove;
document.onmouseup = onMouseUp;
</script>

<script type="text/javascript">
//height
var nMax, nStart, oMove;
function move(){

}
function addHeight(edit, hei){
    var obj = edit.parentNode.parentNode;
    edit.style.display = "block";
    hei = edit.offsetHeight;
    wid = edit.offsetWidth;

    if(!isIE){
        tmp = obj.offsetHeight + hei;
        obj.style.height = tmp + "px";
    }
    edit.style.height = hei + "px";
    edit.style.width = wid + "px";
}
function subHeight(edit){
    var obj = edit.parentNode.parentNode;

    hei = edit.offsetHeight
    hei2 = edit.clientHeight;
    if(hei2>hei) hei = hei2;
    edit.style.display = "none";
    //debug("sub:" + edit.id + "-" + hei);

    tmp = obj.offsetHeight - hei ;
    obj.style.height = tmp + "px";
    if(arguments[1] && edit.parentNode.childNodes.length == 1){
        edit.parentNode.style.display = "none";
    }
}
function showEditor(edit){
    var obj = edit.parentNode.parentNode;
    if(edit.isShow){ //close
        edit.isShow = false;
        subHeight(edit)
    }else{ //show
        edit.isShow = true;
        addHeight(edit);
        //save parameters
        edit.prevPara = getPara(edit);
    }
}
function getPara(obj){
    var chks, para;
    chks = obj.getElementsByTagName("input");
    para = "";
    for(var i=0; i<chks.length; i++){
        if(chks[i].checked)
            para += "|" + chks[i].value;
        else
            para += "| ";
    }
    return para.substr(1);
}
function setPara(obj, paras){
    var chks, para;
    para = paras.split("|");
    if(para.length > 0){
        chks = obj.getElementsByTagName("input");
        for(var i=0; i<chks.length; i++){
            if(para[i] == " ")
                chks[i].checked = false;
            else
                chks[i].checked = true;
        }
    }
}
function resetPara(obj){
    setPara(obj, obj.prevPara);
}
function doChange(objEdit, option, n){
    var objAdd = $(objEdit.id.replace("edit", "add"));
    var objDoID = objAdd.id + n;

    if(!option.checked){ //del
        objDo = $(objDoID);
        subHeight(objDo, true)
        oDel(objDo);
        return;
    }
    //get data
    var data = ["测试新闻1","测试新闻2","测试新闻3"];
    var url = ["http://www.baidu.com", "http://www.google.cn", "http://www.smarta.cn"];

    objDo = document.createElement("div");
    objDo.setAttribute("id", objDoID);
    title = option.getAttribute("title")
    html ="<table width='100%' cellspacing='1' cellpadding='3' border='0' style='background:#FFFFFF'>";
    html+="<tr><td style='height:20px; background:#DEDEDE; font-weight:bold; padding-left:5px'>" + title + "</td></tr>";

    for(var i=0; i<data.length; i++){
        html += "<tr><td style='background:#F8F8F8;'><a href='" + url[i] + "' target='_blank'>" + (i+1) + ". " + data[i] + "</a></td></tr>";
    }
    html += "</table>";;
    objDo.innerHTML = html;

    objAdd.style.display = "block";
    objAdd.appendChild(objDo);
    addHeight(objDo);
}
function doAction(action, sObj){
    var obj = $(sObj);
    showEditor(obj);
    if(action == "save"){
        obj.currentPara = getPara(obj);
        if(obj.currentPara != obj.prevPara){ //
            cp = obj.currentPara.split("|");
            pp = obj.prevPara.split("|");
            chks = obj.getElementsByTagName("input");
            for(var i=0; i<cp.length; i++){
                if(cp[i] != pp[i]){
                    doChange(obj, chks[i], i);
                }
            }
        }
    }else{
        resetPara(obj);
    }
}
</script>
</head>

<body>
<div class="page">
    <div class="header">Header</div>
    <div class="content" id="content">
        <div class="left">
            <div class="focus" id="debug"></div>
            <div class="container1" id="con1">
                <div class="box" id="win11">
                    <div class="fwwin">
                        <div class="title">
                            <div class="text">window 11 </div>
                            <div class="button">[编辑]</div>
                        </div>
                        <div class="editor">
                            选项<br />1.<br />2.
                        </div>
                        <div class="body">b</div>
                    </div>
                    <div class="message">
                    </div>
                    <div class="space"></div>
                </div>
                <div class="box" id="win12">
                    <div class="fwwin">
                        <div class="title">
                            <div class="text">window 12 </div>
                            <div class="button">[编辑]</div>
                        </div>
                        <div class="editor">
                            选项<br />1.<br />2.
                        </div>
                        <div class="body">b</div>
                    </div>
                    <div class="message">
                    </div>
                    <div class="space"></div>
                </div>
            </div>
            <div class="container2" id="con2">
                <div class="box" id="win21">
                    <div class="fwwin">
                        <div class="title">
                            <div class="text">window 21 </div>
                            <div class="button">[编辑]</div>
                        </div>
                        <div class="editor">
                            选项<br />1.<br />2.
                        </div>
                        <div class="body">b</div>
                    </div>
                    <div class="message">
                    </div>
                    <div class="space"></div>
                </div>
                <div class="box" id="winNews">
                    <div class="fwwin">
                        <div class="title">
                            <div class="text">新闻中心 </div>
                            <div class="button">[编辑]</div>
                        </div>
                        <div class="editor" id="editNews">
                          <table width="100%" border="0" cellspacing="0" cellpadding="0">
                          <tr><td colspan="2" height="6"></td></tr>
                          <tr><td> 
                            <input type="checkbox" name="chkNews" id="chkNews1" value="1" title="公司新闻" /><label for="chkNews1">公司新闻</label>
                          </td><td>
                            <input type="checkbox" name="chkNews" id="chkNews2" value="2" title="行业新闻" /><label for="chkNews2">行业新闻</label>
                           </td></tr>
                          <tr><td colspan="2" style="border-bottom:1px dashed #CCC; height:6px;font-size:6px;"> </td></tr>
                          <tr><td colspan="2" height="10"></td></tr>
                          <tr><td colspan="2" align="right" valign="middle">
                              <a href="javascript:doAction('save', 'editNews');void(0);">[保存]</a>
                            <a href="javascript:doAction('cancel', 'editNews');void(0);">[取消]</a>
                             
                          </td></tr>
                          <tr><td colspan="2" style="border-bottom:1px dashed #CCC; height:6px;font-size:6px;"> </td></tr>
                          </table>
                        </div>
                        <div class="body">推荐新闻</div>
                    </div>
                    <div class="message" id="addNews">
                    </div>
                    <div class="space"></div>
                </div>
                <div class="box" id="win23">
                    <div class="fwwin">
                        <div class="title">
                            <div class="text">window 23 </div>
                            <div class="button">[编辑]</div>
                        </div>
                        <div class="editor">
                            选项<br />1.<br />2.
                            选项<br />1.<br />2.
                            选项<br />1.<br />2.
                            选项<br />1.<br />2.

                        </div>
                        <div class="body">b</div>
                    </div>
                    <div class="message">
                    </div>
                    <div class="space"></div>
                </div>
            </div>
        </div>
        <div class="container3" id="con3">
            <div class="box" id="win31">
                    <div class="fwwin">
                        <div class="title">
                            <div class="text">window 31 </div>
                            <div class="button">[编辑]</div>
                        </div>
                        <div class="editor">
                            选项<br />1.<br />2.
                        </div>
                        <div class="body">b</div>
                    </div>
                    <div class="message">
                    </div>
                    <div class="space"> </div>
                </div>
                <div class="box" id="win32">
                    <div class="fwwin">
                        <div class="title">
                            <div class="text">window 32 </div>
                            <div class="button">[编辑]</div>
                        </div>
                        <div class="editor">
                            选项<br />1.<br />2.
                        </div>
                        <div class="body">b</div>
                    </div>
                    <div class="message">
                    </div>
                    <div class="space"> </div>
                </div>
        </div>
    </div>
    <div class="footer">Footer</div>
    <div id="dragHelper"> </div>
</div>
</body>
</html>

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原文地址：https://www.cnblogs.com/Freewind22/p/1167118.html