基于JS的WEB会议室预订拖拽式图形界面的实现

       很早之前写的，后来由于这个功能模块取消，最终没有上线，所以与Server交互的那部分还没有写，不过那部分方案我也已经出来了，而且现在客户端这一部分已经通过了比较完备的测试。大家看看这一部分的代码，应该一看就懂。 那时候也不知道那么多JS的UI库，所以全部都是自己绘制的，界面有点简陋，希望凑或者看吧，再就是我们这个项目是局域网项目，所以大家用的都是IE，没有考虑跨浏览器的因素。发出来希望对做同样应用的同志少走点弯路，我写的时候，网上没有这方面的代码，现在有没有就不知道了。

   网页代码

<%...@page contentType="text/html; charset=gb2312" pageEncoding="GB2312" %>
<%...@ page language="java"%>
<%...@ page import="java.util.List" %>
<style>...
th.timem      {...}{font-size: 8pt; font-family: Times New Roman;}
td.reserved   {...}{background-color: #FF0066}
td.free       {...}{background-color: #99CCFF}
td.selected   {...}{background-color: #ccCCFF}
</style>
<script language="JavaScript" type="text/javascript" src="timetable.js"></script>
<script>...
<!--
    var dragging=false;//是否在拖拽
    var OrignCell="";//开始格位
    var CurrentCell="";//当前格位
    var pope;
    window.onload=function()
    ...{
        try...{
            pope=document.getElementById("pop");
            var tp=document.getElementById('TablePosition');
            var tt=CreateTable();
            tp.appendChild(tt);
            SetReserves();
            document.getElementById('2-5').className="reserved";
                document.getElementById('5-10').className="reserved";//for test
        }catch(e)
        ...{
            alert(e.name + ": " + e.message);
        }
    }
       //设置已预订单元
    function SetReserves()
    ...{
        //Insert the Reserved Cells Intialation by SetReserve()
        
    }
-->
</script>
<div id="pop" style="position:absolute;width:50; display: none; z-index:99; font-size: 13px; background:#FFCCFF;filter:alpha(opacity=40); border-style: solid; border-width: thin;border-color:#FF66CC; " >
<div onclick="Reserve()" style="{cursor: hand;} ">预订</div>
<hr size=0.1 color=#FF66CC;>
<div onclick="Cancel()"style="{cursor: hand;} ">取消</div>
</div>
<div id="TablePosition"  >
</div>

 

JS代码：

 

//创建会议室预订情况时间表
    function CreateTable()
    ...{
        var tt=document.createElement("table");
        var tbody=document.createElement("tbody");
        tt.onmouseout=OutDragT;
        tbody.onmouseout=CancleBubble;
        tt.appendChild(tbody);
        tt.border='1';
        tt.id='TimeTable';
        tt.cellSpacing ="1";//???????????
        tt.borderColor="#6699ff";
        tt.align='center';
        tt.onselectstart =False; 
        for(var i=0;i<6;i++)
        ...{
            var tr=document.createElement("tr");
            for(var j=0;j<18;j++)
            ...{
                var hd=document.createElement("td");
                hd.id=i+'-'+j;
                hd.innerHTML="&nbsp;";
                hd.onmousedown = BeginDrag;
                        hd.onmousemove = OnDrag;
                        hd.onmouseup = EndDrag;
                hd.className="free";///for test
                hd.onmouseover=onshow;
                if(i==0)
                ...{
                    hd=document.createElement("th");
                    hd.className='timem';
                    hd.width='30';
                    if(j==0)
                    ...{
                        hd.innerHTML="&nbsp;"
                    }else...{
                        var hour=8+Math.floor(j/2);
                        var minutes=30*(j%2);
                        hd.appendChild(document.createTextNode(hour+':'+minutes));
                    }
                }
                if(j==0&&i!=0)
                ...{
                    hd=document.createElement("th");
                    hd.className='timem';
                    hd.appendChild(document.createTextNode('?'+i));
                }
                tr.appendChild(hd);
            }
            tbody.appendChild(tr);
        }


        return tt;    
    }

    function SetReserve(id)
    ...{
        document.getElementById(id)="reserved";
    }
    //取消事件冒泡
    function CancleBubble()
    ...{
        event.cancelBubble=true;
    }
    //拖拽选择开始函数
    function BeginDrag()
    ...{
        if (event.button != 1)
        ...{
            return;
        }
        OrignCell=this.id;
        CurrentCell=this.id;
        if(ModifyClass())
        ...{        
               dragging=true;
        }else...{
            alert("????????!");
            OrignCell="";
            CurrentCell="";
        }
    }
   //拖拽过程处理函数
    function OnDrag()
    ...{
        if(dragging==false||this.id==CurrentCell)
        ...{
            return;
            
        }
        CurrentCell=this.id;
        if(!ModifyClass())
        ...{
            Reverse()
            dragging=false;
            OrignCell="";
                    CurrentCell="";
            pope.style.display = 'none';
            alert("?????????????!");
            
        }        
    }
    //结束拖拽
    function EndDrag()
    ...{
        if(dragging==false)
        ...{
            return;
        }
        dragging==false;
        pope.style.top=event.clientY
        pope.style.left=event.clientX
        pope.style.display = "";
    }
    //本为处理鼠标过界操作后作他用
    function OutDrag()
    ...{    
        if(dragging==false)
        ...{
            return;
        }
        //???
        Reverse();
        dragging=false;
    
    }
    //Handler for mousemoveout of timetable
    function OutDragT()
    ...{
        var Tt=document.getElementById("TimeTable");
            if(event.clientX<=Tt.offsetLeft||event.clientX>=(Tt.offsetLeft+Tt.offsetWidth)||event.clientY<=Tt.offsetTop||event.clientY>=(Tt.offsetTop+Tt.offsetHeight))
        ...{
            OutDrag();
            window.status="";
        }
    }
    function False()
    ...{
         return false;
    }
    //修正各单元格的状态并返回结果
    function ModifyClass()
    ...{
        
        Reverse();
    
        for(var i=X1();i<=X2();i++)
        ...{
            for(var j=Y1();j<=Y2();j++)
            ...{
                var CName =document.getElementById(i+"-"+j).className;
                if(CName.indexOf("reserved")!=-1)
                ...{
                    return false;
                }
                if(CName.indexOf("selected")!=-1)
                ...{
                    continue;
                }
                if(CName.indexOf("free")!=-1)
                ...{
                    document.getElementById(i+"-"+j).className="selected";
                }                
            }
        }
        return true;
    }
    //返回初始状态
    function Reverse()
    ...{
        for(var i=1;i<6;i++)
        ...{
            for(var j=1;j<18;j++)
            ...{
                var CName =document.getElementById(i+"-"+j).className;
                if(CName.indexOf("selected")!=-1)
                ...{
                    document.getElementById(i+"-"+j).className="free";    
                }
            }            
        }
    }
    //取消选择
    function Cancel()
    ...{
        pope.style.display = 'none';
        OutDrag();
        dragging=false;
    }
    //预订操作
    function Reserve()
    ...{
        pope.style.display = 'none';
        alert("????!")
        dragging=false;
    }
    //选择区域的横方向小坐标
    function X1()
    ...{
        var Bx,Ex;
        var TArray=OrignCell.split('-');
        Bx=parseInt(TArray[0]);
        TArray=CurrentCell.split('-');
        Ex=parseInt(TArray[0]);
        return Bx<=Ex?Bx:Ex;
        
    }
    //选择区域的横方向大坐标
    function X2()
    ...{
        var Bx,Ex;
        var TArray=OrignCell.split('-');
        Bx=parseInt(TArray[0]);
        TArray=CurrentCell.split('-');
        Ex=parseInt(TArray[0]);
        return Bx>=Ex?Bx:Ex;
    }
    //选择区域的纵方向小坐标
    function Y1()
    ...{
        var Bx,Ex;
        var TArray=OrignCell.split('-');
        Bx=parseInt(TArray[1]);
        TArray=CurrentCell.split('-');
        Ex=parseInt(TArray[1]);
        return Bx<=Ex?Bx:Ex;
    }
    //选择区域的纵方向大坐标
    function Y2()
    ...{
        var Bx,Ex;
        var TArray=OrignCell.split('-');
        Bx=parseInt(TArray[1]);
        TArray=CurrentCell.split('-');
        Ex=parseInt(TArray[1]);
        return Bx>=Ex?Bx:Ex;
    }
    //显示选择情况！
    function onshow()
    ...{
        window.status="Cell:"+OrignCell+"::"+CurrentCell+dragging;
    }