多棵树(Multiple trees)

Posted 周四, 06/19/2008 - 00:19 by admin


演示(demo)地址在文章最后.

效果图如下:

主要文件two-trees.html,two-trees.js。

two-trees.html

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Drag and Drop between 2 TreePanels</title>
<link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" />

    <!-- GC -->
 	<!-- LIBS -->
 	<script type="text/javascript" src="../../adapter/ext/ext-base.js"></script>
 	<!-- ENDLIBS -->

    <script type="text/javascript" src="../../ext-all.js"></script>
<script type="text/javascript" src="two-trees.js"></script>

<!-- Common Styles for the examples -->
<link rel="stylesheet" type="text/css" href="../examples.css" />
<style type="text/css">
    #tree, #tree2 {
    	float:left;
    	margin:20px;
    	border:1px solid #c3daf9;
    	width:250px;
    	height:300px;
    }
    .folder .x-tree-node-icon{
		background:transparent url(../../resources/images/default/tree/folder.gif);
	}
	.x-tree-node-expanded .x-tree-node-icon{
		background:transparent url(../../resources/images/default/tree/folder-open.gif);
	}
    </style>
</head>
<body>
<script type="text/javascript" src="../examples.js"></script><!-- EXAMPLES -->
<h1>Drag and Drop betweens two TreePanels</h1>
<p>The TreePanels have a TreeSorter applied in "folderSort" mode.</p>
<p>Both TreePanels are in "appendOnly" drop mode since they are sorted.</p>
<p>Drag along the edge of the tree to trigger auto scrolling while performing a drag and drop.</p>
<p>The data for this tree is asynchronously loaded with a JSON TreeLoader.</p>
<p>The js is not minified so it is readable. See <a href="two-trees.js">two-trees.js</a>.</p>

<div id="tree"></div>
<div id="tree2"></div>

</body>
</html>

two-trees.js

/*
 * Ext JS Library 2.0.2
 * Copyright(c) 2006-2008, Ext JS, LLC.
 * 
 * 
 * http://extjs.com/license
 */

var TreeTest = function(){
    // shorthand
    var Tree = Ext.tree;
    
    return {
        init : function(){
            // yui-ext tree
            var tree = new Tree.TreePanel({
                el:'tree',
                animate:true, 
                autoScroll:true,
                loader: new Tree.TreeLoader({dataUrl:'get-nodes.php'}),
                enableDD:true,
                containerScroll: true,
                dropConfig: {appendOnly:true}
            });
            
            // add a tree sorter in folder mode
            new Tree.TreeSorter(tree, {folderSort:true});
            
            // set the root node
            var root = new Tree.AsyncTreeNode({
                text: 'Ext JS', 
                draggable:false, // disable root node dragging
                id:'source'
            });
            tree.setRootNode(root);
            
            // render the tree
            tree.render();
            
            root.expand(false, /*no anim*/ false);
            
            //-------------------------------------------------------------
            
            // YUI tree            
            var tree2 = new Tree.TreePanel({
                el:'tree2',
                animate:true,
                autoScroll:true,
                //rootVisible: false,
                loader: new Ext.tree.TreeLoader({
                    dataUrl:'get-nodes.php',
                    baseParams: {lib:'yui'} // custom http params
                }),
                containerScroll: true,
                enableDD:true,
                dropConfig: {appendOnly:true}
            });
            
            // add a tree sorter in folder mode
            new Tree.TreeSorter(tree2, {folderSort:true});
            
            // add the root node
            var root2 = new Tree.AsyncTreeNode({
                text: 'My Files', 
                draggable:false, 
                id:'yui'
            });
            tree2.setRootNode(root2);
            tree2.render();
            
            root2.expand(false, /*no anim*/ false);
        }
    };
}();

Ext.EventManager.onDocumentReady(TreeTest.init, TreeTest, true);

get-nodes.php

<?php
// from php manual page
function formatBytes($val, $digits = 3, $mode = "SI", $bB = "B"){ //$mode == "SI"|"IEC", $bB == "b"|"B"
   $si = array("", "K", "M", "G", "T", "P", "E", "Z", "Y");
   $iec = array("", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi");
   switch(strtoupper($mode)) {
       case "SI" : $factor = 1000; $symbols = $si; break;
       case "IEC" : $factor = 1024; $symbols = $iec; break;
       default : $factor = 1000; $symbols = $si; break;
   }
   switch($bB) {
       case "b" : $val *= 8; break;
       default : $bB = "B"; break;
   }
   for($i=0;$i<count($symbols)-1 && $val>=$factor;$i++)
       $val /= $factor;
   $p = strpos($val, ".");
   if($p !== false && $p > $digits) $val = round($val);
   elseif($p !== false) $val = round($val, $digits-$p);
   return round($val, $digits) . " " . $symbols[$i] . $bB;
}

$dir = isset($_REQUEST['lib'])&&$_REQUEST['lib'] == 'yui' ? '../../../' : '../../';
$node = isset($_REQUEST['node'])?$_REQUEST['node']:"";
if(strpos($node, '..') !== false){
    die('Nice try buddy.');
}
$nodes = array();
$d = dir($dir.$node);
while($f = $d->read()){
    if($f == '.' || $f == '..' || substr($f, 0, 1) == '.')continue;
    $lastmod = date('M j, Y, g:i a',filemtime($dir.$node.'/'.$f));
    if(is_dir($dir.$node.'/'.$f)){
        $qtip = 'Type: Folder<br />Last Modified: '.$lastmod;
        $nodes[] = array('text'=>$f, 'id'=>$node.'/'.$f/*, 'qtip'=>$qtip*/, 'cls'=>'folder');
    }else{
        $size = formatBytes(filesize($dir.$node.'/'.$f), 2);
        $qtip = 'Type: JavaScript File<br />Last Modified: '.$lastmod.'<br />Size: '.$size;
        $nodes[] = array('text'=>$f, 'id'=>$node.'/'.$f, 'leaf'=>true/*, 'qtip'=>$qtip, 'qtipTitle'=>$f */, 'cls'=>'file');
    }
}
$d->close();
echo json_encode($nodes);
?>

注意例子中开头是<?，有时候PHP不会解析，把它变为 <?php 即可。

演示地址：http://extjs.org.cn/extjs/examples/tree/two-trees.html

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