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JSP 动态树的实现_JSP编程_

2023-05-25 352人已围观

简介 JSP 动态树的实现_JSP编程_

第一步：在开始之前我们需要准备这么一个js文件，代码如下。我姑且将它命名为tree.js。

\n';
    if (document.getElementById) {
        if (this.config.useCookies) this.selectedNode = this.getSelected();
        str += this.addNode(this.root);
    } else str += 'Browser not supported.';
    str += '

';
    if (!this.selectedFound) this.selectedNode = null;
    this.completed = true;
    return str;
};
// Creates the tree structure
tree.prototype.addNode = function(pNode) {
    var str = '';
    var n=0;
    if (this.config.inOrder) n = pNode._ai;
    for (n; n        if (this.aNodes[n].pid == pNode.id) {
            var cn = this.aNodes[n];
            cn._p = pNode;
            cn._ai = n;
            this.setCS(cn);
            if (!cn.target && this.config.target) cn.target = this.config.target;
            if (cn._hc && !cn._io && this.config.useCookies) cn._io = this.isOpen(cn.id);
            if (!this.config.folderLinks && cn._hc) cn.url = null;
            if (this.config.useSelection && cn.id == this.selectedNode && !this.selectedFound) {
                    cn._is = true;
                    this.selectedNode = n;
                    this.selectedFound = true;
            }
            str += this.node(cn, n);
            if (cn._ls) break;
        }
    }
    return str;
};
// Creates the node icon, url and text
tree.prototype.node = function(node, nodeId) {
    var str = '

' + this.indent(node, nodeId);
    if (this.config.useIcons) {
        if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node._hc) ? this.icon.folder : this.icon.node);
        if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;
        if (this.root.id == node.pid) {
            node.icon = this.icon.root;
            node.iconOpen = this.icon.root;
        }
        str += '

';
    }
    if (node.url) {
        str += '        if (node.title) str += ' title="' + node.title + '"';
        if (node.target) str += ' target="' + node.target + '"';
        if (this.config.useStatusText) str += ' onmouseover="window.status=\'' + node.name + '\';return true;" onmouseout="window.status=\'\';return true;" ';
        if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc))
            str += ' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"';
        str += '>';
    }
    else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)
        str += '';
    str += node.name;
    if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '';

    //[!--begin--]add by wangxr to append str
    if(node.appendedStr) str += node.appendedStr;
    //[!--end--]
    str += '

';
if (node._hc) {
str += '

';
str += this.addNode(node);
str += '

';
    }
    this.aIndent.pop();
    return str;
};
// Adds the empty and line icons
tree.prototype.indent = function(node, nodeId) {
    var str = '';
    if (this.root.id != node.pid) {
        for (var n=0; n            str += '

';
        (node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);
        if (node._hc) {
            str += '

';
} else str += '

';
    }
    return str;
};
// Checks if a node has any children and if it is the last sibling
tree.prototype.setCS = function(node) {
    var lastId;
    for (var n=0; n        if (this.aNodes[n].pid == node.id) node._hc = true;
        if (this.aNodes[n].pid == node.pid) lastId = this.aNodes[n].id;
    }
    if (lastId==node.id) node._ls = true;
};
// Returns the selected node
tree.prototype.getSelected = function() {
    var sn = this.getCookie('cs' + this.obj);
    return (sn) ? sn : null;
};
// Highlights the selected node
tree.prototype.s = function(id) {
    if (!this.config.useSelection) return;
    var cn = this.aNodes[id];
    if (cn._hc && !this.config.folderLinks) return;
    if (this.selectedNode != id) {
        if (this.selectedNode || this.selectedNode==0) {
            eOld = document.getElementById("s" + this.obj + this.selectedNode);
            eOld.className = "node";
        }
        eNew = document.getElementById("s" + this.obj + id);
        eNew.className = "nodeSel";
        this.selectedNode = id;
        if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
    }
};
// Toggle Open or close
tree.prototype.o = function(id) {
    var cn = this.aNodes[id];
    this.nodeStatus(!cn._io, id, cn._ls);
    cn._io =

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