ig_webtree.js

研究怎样通过手写代码来完成自动生成代码

	igtree_lastActiveTree=tn;
	if(igtxt || igimg)
	{
		var node=igtree_getNodeById(eNode.id);
		if(node!=null) {
			if(node.getEnabled() == false)
				return;
		}
		if(tree.Selectable) {
			igtree_navigate(tree, node)
			igtree_setSelectedNode(tn,eNode.id);
		}
	}
	else if(src.tagName=="IMG")
		igtree_toggle(tn,eNode.id);
	else if(igchk) {
		igtree_checkboxClick(tn, eNode.id, src);
	}
	return false;
}

var igtree_treeName;
var igtree_nodeId;
var igtree_postCanceled = false;

var igtree_clickCounter = 0;

// private - Handles posting node click events to the server
function igtree_postNodeClick(treeName, nodeId)
{
	igtree_treeName = treeName;
	igtree_nodeId = nodeId;
	var src;
	src = igtree_getElementById(nodeId);
	igtree_clickCounter++;
	if(igtree_clickCounter == 1)
		setTimeout('igtree_onTimerPostNodeClick()', 300);
}

// private - Posts node click events on time expiration
function igtree_onTimerPostNodeClick() 
{
	var tree = igtree_getTreeById(igtree_treeName);	
	tree.update("SelectedNode", igtree_nodeId);
	if(igtree_postCanceled == false) {
		tree.NeedPostBack=false;
		__doPostBack(tree.UniqueId, igtree_nodeId+":Clicked");
	}
	igtree_postCanceled = false;
	igtree_clickCounter = 0;
}

// private - Handles the scrolling of the tree
function igtree_onscroll(src)
{
	var treeName = src;
	var ts = igtree_getTreeById(src);	
	var treeControl = igtree_getElementById("T_" + treeName);
	ts.update("ScrollTopPos", treeControl.scrollTop);
	return true;
}
	
// private - Updates the PostBackData field
function igtree_updatePostField(treeName, nodeId, oldNodeId)
{
	var formControl = igtree_getElementById(igtree_getUniqueId(treeName));
	if(!formControl)
		return;
	
	formControl.value = treeState;
}

// private - Handles the double click event for a node
function igtree_dblclick(evnt,tn)
{
	var src=igtree_getSrcNodeElement(evnt,tn);
	if(!src)
		return;
	var tree=igtree_treeState[tn];
	var eNode = igtree_getNodeElement(src);
	var igtxt = src.getAttribute("igtxt")!=null && src.getAttribute("igtxt").length>0;	
	var igimg = src.getAttribute("igimg")!=null && src.getAttribute("igimg").length>0;	
	if(igtxt && tree.Editable)
	{
		igtree_postCanceled = true;
		igtree_beginedit(tn,eNode.id);
		return;
	}
	if(igimg || igtxt) {
		if(!tree.Enabled)
			return;

		var node=igtree_getNodeById(eNode.id);
		if(node.getFirstChild() != null || tree.LoadOnDemand>=1) {
			igtree_toggle(tn,eNode.id);
		}
	}
}

var igtree_editControl = null;
// private - Retrieves the in-place edit control for an editable tree
function igtree_getEditControl(src)
{
	var strArray;
	if(!src)
		return null;
	if(igtree_IE)
		strArray = src.parentElement.id.split("_");
	else
		strArray = src.parentNode.id.split("_");
	var treeName = strArray[0];
	return igtree_getElementById(treeName+"_tb");
}

// private - Handles mouse clicks within the edit control
function igtree_editClickHandler()
{
	event.cancelBubble = true;
}

// private - Handles selection events for the tree
var igtree_bDragSelect = false;
function igtree_selectStart()
{
	if(window.event.srcElement.tagName == "INPUT")
		return;
	if(igtree_bDragSelect)
		return;
	window.event.cancelBubble = true; 
	window.event.returnValue = false; 
	return false;	
}

// private - Updates internal buffer for node expansion/collapse data
function igtree_updateNodeToggle(ts, nodeId, bExpanded)
{
	nodeId = nodeId.replace("M_", "");
	var node = igtree_getNodeById(nodeId);
	node.update("Expanded", bExpanded);
	
}
   
// private - Updates internal buffer for node checked status
function igtree_updateNodeCheck(ts, nodeId, bChecked){
	var node = igtree_getNodeById(nodeId);
	node.update("Checked", bChecked);

}

// private - Handles key down events
function igtree_keydown(evnt, treeID)
{
	var ts=igtree_treeState[treeID];
	var tree=ts.treeElement;
	var processed=false;
	var igtree_currentNode = igtree_selectedNode(treeID);
	if(igtree_fireEvent(treeID,ts.Events.KeyDown,"(\""+treeID+"\","+evnt.keyCode+")"))
		return;
	if(evnt.keyCode == 13){  // Enter
		if(igtree_currentNode != null)	{
			processed=true;
			igtree_navigate(ts, ts.getSelectedNode());			
		}
	}
	if(evnt.keyCode == 113){  // F2
		if(igtree_currentNode != null)	{
			processed=true;
			if(ts.Editable)
				igtree_beginedit(treeID,igtree_currentNode.id);
		}
	}
	if(evnt.keyCode == 107 || evnt.keyCode == 109 || evnt.keyCode == 37 || evnt.keyCode == 39)
	{ // plus/minus key
		if(igtree_currentNode == null)
			return;
		var ns=igtree_getElementById("M_"+igtree_currentNode.id);
		if(!ns && ts.LoadOnDemand>0) {
			if(evnt.keyCode==107 || evnt.keyCode==39)
				igtree_toggle(treeID,igtree_currentNode.id);
			processed=true;
		}
		else
		if(ns)	{
			var toggle=((evnt.keyCode == 107 || evnt.keyCode == 39) && ns.style.display=="none" || (evnt.keyCode == 109 || evnt.keyCode == 37) && ns.style.display=="");
			if(toggle)
				igtree_toggle(treeID,igtree_currentNode.id);
			processed=true;
		}
	}
	if(evnt.keyCode == 35){ // end key
		if(igtree_currentNode)	{
			var last = igtree_lastNode(treeID);
			if(last){
				last=igtree_setSelectedNode(treeID,last.id);
				igtree_scrollToView(tree,last);
				processed=true;
			}
		}
	}
	if(evnt.keyCode == 36){ // home key
		if(igtree_currentNode){
			var first = igtree_firstNode(treeID);
			if(first){
				first=igtree_setSelectedNode(treeID,first.id);
				igtree_scrollToView(tree,first);
				processed=true;
			}
		}
	}
	if(evnt.keyCode == 38)	{ // up arrow
		if(igtree_currentNode)	{
			var sibling = igtree_prevVisibleNode(treeID,igtree_currentNode);
			if(sibling)	{
				while(sibling && sibling.getAttribute("nodeDisabled"))
					sibling = igtree_prevVisibleNode(treeID,sibling);
				if(!sibling)
					return;	
				sibling=igtree_setSelectedNode(treeID,sibling.id);
				igtree_scrollToView(tree,sibling);
				processed=true;
			}
		}
	}
	if(evnt.keyCode == 40)
	{ // down arrow
		if(igtree_currentNode){
			var sibling = igtree_nextVisibleNode(treeID,igtree_currentNode);
			if(sibling)	{
				while(sibling && sibling.getAttribute("nodeDisabled"))
					sibling = igtree_nextVisibleNode(treeID,sibling);
				if(!sibling)
					return;	
				sibling=igtree_setSelectedNode(treeID,sibling.id);
				igtree_scrollToView(tree,sibling);
				processed=true;
			}
		}
	}
	if(processed)	{
		// [KV 10/29/2004, 4:27 PM] Corrected spelling mistake, Babble to Bubble
		//evnt.cancelBabble=true;
		evnt.cancelBubble=true;
		evnt.returnValue=false;
		return false;
	}
}

// private - Handles key up events
function igtree_keyup(evnt, tn)
{
	if(igtree_fireEvent(tn,igtree_treeState[tn].Events.KeyUp,"(\""+tn+"\","+evnt.keyCode+")"))
		return;
}

// private
function igtree_nextSibling(tn,node,all) {
	var ts=igtree_treeState[tn];
	var sibling;
	if(!node)	{
		var tree=ts.treeElement;
		var first=tree.childNodes[0].childNodes[0].childNodes[0];
		while(first && first.tagName!="DIV")
			first=first.nextSibling;
		if(!first)
			return null;
		sibling=first;
		while(sibling && (sibling.tagName!="DIV" || sibling.id.substr(0,2)=="M_"))
			sibling=sibling.nextSibling;
		return sibling;
	}
	else
		sibling = node.nextSibling;
	while(sibling && (sibling.tagName!="DIV" || sibling.style.display=="none" || all && sibling.id.substr(0,2)=="M_"))
		sibling=sibling.nextSibling;
	if(!sibling && all)
		return null;
	var parentNode = node.parentNode;
	while(!sibling && parentNode && parentNode.id.substr(0,2)=="M_"){
		sibling=parentNode.nextSibling;
		while(sibling && (sibling.tagName!="DIV" || sibling.style.display=="none"))
			sibling=sibling.nextSibling;
		parentNode=parentNode.parentNode;
	}
	if(sibling && sibling.id.substr(0,2)=="M_")
		sibling=sibling.childNodes[0];
	while(sibling && (sibling.tagName!="DIV" || sibling.style.display=="none"))
		sibling=sibling.nextSibling;
	return sibling;
}

// private
function igtree_nextSiblingAll(tn,node,all) {
	var ts=igtree_treeState[tn];
	var sibling;
	if(!node)	{
		var tree=ts.treeElement;
		var first=tree.childNodes[0].childNodes[0].childNodes[0];
		while(first && first.tagName!="DIV")
			first=first.nextSibling;
		if(!first)
			return null;
		sibling=first;
		while(sibling && (sibling.tagName!="DIV" || sibling.id.substr(0,2)=="M_"))
			sibling=sibling.nextSibling;
		return sibling;
	}
	else
		sibling = node.nextSibling;
	while(sibling && (sibling.tagName!="DIV" || all && sibling.id.substr(0,2)=="M_"))
		sibling=sibling.nextSibling;
	if(!sibling && all)
		return null;
	var parentNode = node.parentNode;
	while(!sibling && parentNode && parentNode.id.substr(0,2)=="M_"){
		sibling=parentNode.nextSibling;
		while(sibling && (sibling.tagName!="DIV" ))
			sibling=sibling.nextSibling;
		parentNode=parentNode.parentNode;
	}
	if(sibling && sibling.id.substr(0,2)=="M_")
		sibling=sibling.childNodes[0];
	while(sibling && (sibling.tagName!="DIV" ))
		sibling=sibling.nextSibling;
	return sibling;
}

function igtree_prevSibling(tn,node,all)
{
	var ts=igtree_treeState[tn];
	var sibling;
	if(!node)	{
		var tree=ts.treeElement;
		var last=tree.childNodes[0].childNodes[tree.childNodes[0].childNodes.length-1];
		while(last && last.tagName!="DIV")
			last=last.previousSibling;
		if(!last)
			return null;
		sibling=last;
		while(sibling && (sibling.tagName!="DIV" || sibling.id.substr(0,2)=="M_"))
			sibling=sibling.previousSibling;
		return sibling;
	}
	else
		sibling = node.previousSibling;
	while(sibling && (sibling.tagName!="DIV" || sibling.style.display=="none" || all && sibling.id.substr(0,2)=="M_"))
		sibling=sibling.previousSibling;
	if(!sibling && all)
		return null;
	var parentNode = node.parentNode;
	while(!sibling && parentNode && parentNode.id.substr(0,2)=="M_"){
		sibling=parentNode.previousSibling;
		while(sibling && (sibling.tagName!="DIV" || sibling.style.display=="none"))
			sibling=sibling.previousSibling;
		parentNode=parentNode.parentNode;
	}
	while(sibling && sibling.id.substr(0,2)=="M_") {
		sibling=sibling.childNodes[sibling.childNodes.length-1];
		while(sibling && (sibling.tagName!="DIV" || sibling.style.display=="none"))
			sibling=sibling.previousSibling;
	}
	return sibling;
}

function igtree_fnGetLeftPos(e) 
{
    x = e.offsetLeft;
    tmpE = e.offsetParent;
    while (tmpE != null)
    {
        x += tmpE.offsetLeft;
        if(tmpE.tagName=="DIV" && tmpE.style.borderLeftWidth)
	        x += parseInt(tmpE.style.borderLeftWidth);
        if(igtree_IE && tmpE.tagName!="BODY") {
			x-=tmpE.scrollLeft;
	    }
        tmpE = tmpE.offsetParent;
    }
    return x;
}

// Returns top position of some element
function igtree_fnGetTopPos(e) 
{
    y = e.offsetTop;
    tmpE = e.offsetParent;
    while (tmpE != null) {
        y += tmpE.offsetTop;
        if(tmpE.tagName=="DIV" && tmpE.style.borderTopWidth)
	        y += parseInt(tmpE.style.borderTopWidth);
        if(igtree_IE && tmpE.tagName!="BODY")
			y-=tmpE.scrollTop;
        tmpE = tmpE.offsetParent;
    }
    return y;
}

function igtree_scrollToView(parent,child)
{
	if(parent.scrollWidth<=parent.offsetWidth && parent.scrollHeight<=parent.offsetHeight)
		return;
	var childLeft=igtree_fnGetLeftPos(child);
	var parentLeft=igtree_fnGetLeftPos(parent);
	var childTop=igtree_fnGetTopPos(child);
	var parentTop=igtree_fnGetTopPos(parent);
	var childRight=childLeft+child.offsetWidth;
	var parentRight=parentLeft+parent.offsetWidth;
	var childBottom=childTop+child.offsetHeight;
	var parentBottom=parentTop+parent.offsetHeight;
	var hsw=(parent.scrollWidth>parent.offsetWidth?18:0);
	var vsw=(parent.scrollWidth>parent.offsetWidth || parent.scrollHeight>parent.offsetHeight?18:0);
	if(childRight>parentRight-vsw && childLeft-(childRight-parentRight)>parentLeft)
		parent.scrollLeft+=childRight-parentRight+vsw;
	if(childBottom>parentBottom-hsw && childTop-(parentTop-childTop)>parentTop)
		parent.scrollTop+=childBottom-parentBottom+hsw;
	if(childLeft<parentLeft)
		parent.scrollLeft-=parentLeft-childLeft;
	if(childTop<parentTop)
		parent.scrollTop-=parentTop-childTop;
}

function igtree_editKeyDown(evnt,tn)
{
	if(!igtree_editControl)
		return;
	var src=igtree_getElementById(igtree_editControl.getAttribute("currentNode"));
	var node=igtree_getNodeById(src.id);
	src=igtree_getNodeSpan(src);
	if(igtree_fireEvent(tn,igtree_treeState[tn].Events.EditKeyDown,"(\""+tn+"\",\""+node.getElement().id+"\","+evnt.keyCode+")")){
		evnt.cancelBubble = true;
		evnt.returnValue = false;
		return;
	}
	if(igtree_IE) {
		evnt.cancelBubble=true;
		if(evnt.keyCode==13)
		{
			event.returnValue=false;
			igtree_endedit(true);
			return false;
		}
		else if(evnt.keyCode==27)
			igtree_endedit(false);
	}
	else {
		if(evnt.keyCode==13){
			evnt.stopPropagation();
			igtree_endedit(true);
			return false;
		}
		else if(evnt.keyCode==27)
			igtree_endedit(false);
	}
}

function igtree_editKeyUp(evnt,tn)
{
	if(!igtree_editControl)