webcontrol treeview 的节点拖拽问题
在现在的treeview问题中找了很久，难道大家都没有碰到过要拖动节点的问题吗。希望有人能指点一下。 问题点数：100、回复次数：16Top
1 楼warren1999（warren1999）回复于 2005-02-01 08:30:24 得分 0
gzTop
2 楼simon8181（）回复于 2005-02-01 08:38:33 得分 0
gzTop
3 楼jsyzfeb（）回复于 2005-02-01 08:38:41 得分 0
dingTop
4 楼shenghuayi（oldman）回复于 2005-02-01 08:45:01 得分 10
这个问题有点难，首先我看你需要把MS在后台写的那几个HTC弄明白，然后就是使用JS来处理了，当然处理的同时得做无刷新后台保存。Top
5 楼camelials（星期五）回复于 2005-02-01 08:46:57 得分 10
treeview这个东东，不好的地方也多．
要实现树还有很多方法．
我记得以前孟子告诉过我一个可以拖拉的树．
你上google找一个drag & drop.
看看．要不然去问问孟子Top
6 楼owg（OMG）回复于 2005-02-01 08:48:36 得分 10
参考：http://www.evget.com/view/viewCategoryProduct.asp?language=&mode=&productTypeId=&categoryId=21Top
7 楼goody9807（http://goody9807.cnblogs.com）回复于 2005-02-01 08:53:22 得分 30
给个JS的例子你看看
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>可移动窗口</title>
<script language="JavaScript" type="text/JavaScript">
<!--
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_dragLayer(objName,x,hL,hT,hW,hH,toFront,dropBack,cU,cD,cL,cR,targL,targT,tol,dropJS,et,dragJS) { //v4.01
//Copyright 1998 Macromedia, Inc. All rights reserved.
var i,j,aLayer,retVal,curDrag=null,curLeft,curTop,IE=document.all,NS4=document.layers;
var NS6=(!IE&&document.getElementById), NS=(NS4||NS6); if (!IE && !NS) return false;
retVal = true; if(IE && event) event.returnValue = true;
if (MM_dragLayer.arguments.length > 1) {
curDrag = MM_findObj(objName); if (!curDrag) return false;
if (!document.allLayers) { document.allLayers = new Array();
with (document) if (NS4) { for (i=0; i<layers.length; i++) allLayers[i]=layers[i];
for (i=0; i<allLayers.length; i++) if (allLayers[i].document && allLayers[i].document.layers)
with (allLayers[i].document) for (j=0; j<layers.length; j++) allLayers[allLayers.length]=layers[j];
} else {
if (NS6) { var spns = getElementsByTagName("span"); var all = getElementsByTagName("div");
for (i=0;i<spns.length;i++) if (spns[i].style&&spns[i].style.position) allLayers[allLayers.length]=spns[i];}
for (i=0;i<all.length;i++) if (all[i].style&&all[i].style.position) allLayers[allLayers.length]=all[i];
} }
curDrag.MM_dragOk=true; curDrag.MM_targL=targL; curDrag.MM_targT=targT;
curDrag.MM_tol=Math.pow(tol,2); curDrag.MM_hLeft=hL; curDrag.MM_hTop=hT;
curDrag.MM_hWidth=hW; curDrag.MM_hHeight=hH; curDrag.MM_toFront=toFront;
curDrag.MM_dropBack=dropBack; curDrag.MM_dropJS=dropJS;
curDrag.MM_everyTime=et; curDrag.MM_dragJS=dragJS;
curDrag.MM_oldZ = (NS4)?curDrag.zIndex:curDrag.style.zIndex;
curLeft= (NS4)?curDrag.left:(NS6)?parseInt(curDrag.style.left):curDrag.style.pixelLeft;
if (String(curLeft)=="NaN") curLeft=0; curDrag.MM_startL = curLeft;
curTop = (NS4)?curDrag.top:(NS6)?parseInt(curDrag.style.top):curDrag.style.pixelTop;
if (String(curTop)=="NaN") curTop=0; curDrag.MM_startT = curTop;
curDrag.MM_bL=(cL<0)?null:curLeft-cL; curDrag.MM_bT=(cU<0)?null:curTop-cU;
curDrag.MM_bR=(cR<0)?null:curLeft+cR; curDrag.MM_bB=(cD<0)?null:curTop+cD;
curDrag.MM_LEFTRIGHT=0; curDrag.MM_UPDOWN=0; curDrag.MM_SNAPPED=false; //use in your JS!
document.onmousedown = MM_dragLayer; document.onmouseup = MM_dragLayer;
if (NS) document.captureEvents(Event.MOUSEDOWN|Event.MOUSEUP);
} else {
var theEvent = ((NS)?objName.type:event.type);
if (theEvent == 'mousedown') {
var mouseX = (NS)?objName.pageX : event.clientX + document.body.scrollLeft;
var mouseY = (NS)?objName.pageY : event.clientY + document.body.scrollTop;
var maxDragZ=null; document.MM_maxZ = 0;
for (i=0; i<document.allLayers.length; i++) { aLayer = document.allLayers[i];
var aLayerZ = (NS4)?aLayer.zIndex:parseInt(aLayer.style.zIndex);
if (aLayerZ > document.MM_maxZ) document.MM_maxZ = aLayerZ;
var isVisible = (((NS4)?aLayer.visibility:aLayer.style.visibility).indexOf('hid') == -1);
if (aLayer.MM_dragOk != null && isVisible) with (aLayer) {
var parentL=0; var parentT=0;
if (NS6) { parentLayer = aLayer.parentNode;
while (parentLayer != null && parentLayer.style.position) {
parentL += parseInt(parentLayer.offsetLeft); parentT += parseInt(parentLayer.offsetTop);
parentLayer = parentLayer.parentNode;
} } else if (IE) { parentLayer = aLayer.parentElement;
while (parentLayer != null && parentLayer.style.position) {
parentL += parentLayer.offsetLeft; parentT += parentLayer.offsetTop;
parentLayer = parentLayer.parentElement; } }
var tmpX=mouseX-(((NS4)?pageX:((NS6)?parseInt(style.left):style.pixelLeft)+parentL)+MM_hLeft);
var tmpY=mouseY-(((NS4)?pageY:((NS6)?parseInt(style.top):style.pixelTop) +parentT)+MM_hTop);
if (String(tmpX)=="NaN") tmpX=0; if (String(tmpY)=="NaN") tmpY=0;
var tmpW = MM_hWidth; if (tmpW <= 0) tmpW += ((NS4)?clip.width :offsetWidth);
var tmpH = MM_hHeight; if (tmpH <= 0) tmpH += ((NS4)?clip.height:offsetHeight);
if ((0 <= tmpX && tmpX < tmpW && 0 <= tmpY && tmpY < tmpH) && (maxDragZ == null
|| maxDragZ <= aLayerZ)) { curDrag = aLayer; maxDragZ = aLayerZ; } } }
if (curDrag) {
document.onmousemove = MM_dragLayer; if (NS4) document.captureEvents(Event.MOUSEMOVE);
curLeft = (NS4)?curDrag.left:(NS6)?parseInt(curDrag.style.left):curDrag.style.pixelLeft;
curTop = (NS4)?curDrag.top:(NS6)?parseInt(curDrag.style.top):curDrag.style.pixelTop;
if (String(curLeft)=="NaN") curLeft=0; if (String(curTop)=="NaN") curTop=0;
MM_oldX = mouseX - curLeft; MM_oldY = mouseY - curTop;
document.MM_curDrag = curDrag; curDrag.MM_SNAPPED=false;
if(curDrag.MM_toFront) {
eval('curDrag.'+((NS4)?'':'style.')+'zIndex=document.MM_maxZ+1');
if (!curDrag.MM_dropBack) document.MM_maxZ++; }
retVal = false; if(!NS4&&!NS6) event.returnValue = false;
} } else if (theEvent == 'mousemove') {
if (document.MM_curDrag) with (document.MM_curDrag) {
var mouseX = (NS)?objName.pageX : event.clientX + document.body.scrollLeft;
var mouseY = (NS)?objName.pageY : event.clientY + document.body.scrollTop;
newLeft = mouseX-MM_oldX; newTop = mouseY-MM_oldY;
if (MM_bL!=null) newLeft = Math.max(newLeft,MM_bL);
if (MM_bR!=null) newLeft = Math.min(newLeft,MM_bR);
if (MM_bT!=null) newTop = Math.max(newTop ,MM_bT);
if (MM_bB!=null) newTop = Math.min(newTop ,MM_bB);
MM_LEFTRIGHT = newLeft-MM_startL; MM_UPDOWN = newTop-MM_startT;
if (NS4) {left = newLeft; top = newTop;}
else if (NS6){style.left = newLeft; style.top = newTop;}
else {style.pixelLeft = newLeft; style.pixelTop = newTop;}
if (MM_dragJS) eval(MM_dragJS);
retVal = false; if(!NS) event.returnValue = false;
} } else if (theEvent == 'mouseup') {
document.onmousemove = null;
if (NS) document.releaseEvents(Event.MOUSEMOVE);
if (NS) document.captureEvents(Event.MOUSEDOWN); //for mac NS
if (document.MM_curDrag) with (document.MM_curDrag) {
if (typeof MM_targL =='number' && typeof MM_targT == 'number' &&
(Math.pow(MM_targL-((NS4)?left:(NS6)?parseInt(style.left):style.pixelLeft),2)+
Math.pow(MM_targT-((NS4)?top:(NS6)?parseInt(style.top):style.pixelTop),2))<=MM_tol) {
if (NS4) {left = MM_targL; top = MM_targT;}
else if (NS6) {style.left = MM_targL; style.top = MM_targT;}
else {style.pixelLeft = MM_targL; style.pixelTop = MM_targT;}
MM_SNAPPED = true; MM_LEFTRIGHT = MM_startL-MM_targL; MM_UPDOWN = MM_startT-MM_targT; }
if (MM_everyTime || MM_SNAPPED) eval(MM_dropJS);
if(MM_dropBack) {if (NS4) zIndex = MM_oldZ; else style.zIndex = MM_oldZ;}
retVal = false; if(!NS) event.returnValue = false; }
document.MM_curDrag = null;
}
if (NS) document.routeEvent(objName);
} return retVal;
}
//-->
</script>
</head>
Top
8 楼goody9807（http://goody9807.cnblogs.com）回复于 2005-02-01 08:53:37 得分 10
<body bgcolor="#003366" onLoad="MM_dragLayer('log','',0,0,0,0,true,false,-1,-1,-1,-1,false,false,0,'',false,'')">
<div id=log style="position:absolute; left:348px; top:192px; width:377px; height:189px; z-index:1" >
<table width="377" border="0" cellpadding="0" cellspacing="0" style="background:#003399 ;font-size:17px ;color:#ffffff;font-weight:boder;">
<!--DWLayoutTable-->
<tr>
<td width="377" height="18" valign="top" > 窗口名称</td>
</tr>
</table>
<table width="377" border="0" cellpadding="0" cellspacing="0" style="border:#003399 1px solid; background:#dddddd;">
<!--DWLayoutTable-->
<tr>
<td width="377" height="20" bgcolor="#CCCCCC"></td>
<td width="377" height="147" bgcolor="#FFFFFF"></td>
</tr>
</table>
</div>
</body>
</html>
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9 楼liulxmooo（娃娃）回复于 2005-02-01 08:57:01 得分 0
upTop
10 楼xueqs（）回复于 2005-02-01 09:01:41 得分 10
写拖曳js要牛才行Top
11 楼mooddecode1980（心情解码）回复于 2005-02-01 09:08:47 得分 0
:)
--Top
12 楼haoco（）回复于 2005-02-01 11:42:49 得分 0
upTop
13 楼soochowgreen（Green）回复于 2005-02-01 14:45:28 得分 0
问个傻瓜问题：
拖动节点完毕后如何触发后台的事件呢？
唉，感觉B/S上的树的刷新总是最累人的事情哇Top
14 楼lovelxj（伊斯人，吾谁与归）回复于 2005-02-01 15:00:22 得分 10
拖动完 节点 之后 可以远程 调用程序来更新数据库
或者是让包含的一个iframe 来完成这个更新的工作Top
15 楼soochowgreen（Green）回复于 2005-02-01 15:12:44 得分 0
噢，这样啊，
也就是说用 URL 投递参数比较方便喽，
thanks
Top
16 楼nga96（因为我笨，所以努力。陈勇华）回复于 2005-02-01 15:27:37 得分 10
自己写算了Top
