/**//*
** Author : Jonllen
** Create : 2010-05-01
** Update : 2010-05-09
** SVN : 153
** WebSite:
*/
var ContextMenu = function (settings) ...{
for( p in this.settings)
...{
if( !settings.hasOwnProperty(p) ) settings[p] = this.settings[p];
}
this.settings = settings;
this.settings.menu = document.createElement('div');
this.settings.menu.className = this.settings.css;
this.settings.menu.style.cssText = 'position:absolute;display:none;';
document.body.insertBefore(this.settings.menu,document.body.childNodes[0]);
return this;
}
ContextMenu.prototype = ...{
list : new Array(),
active : new Array(),
iframes : new Array(),
settings : ...{
menu : null,
excursionX : 0,
excursionY : 0,
css : 'contextmenu',
container : null,
locked : false
},
item : ...{
id : null,
level : 1,
parentId : 0,
html : '',
title : '',
href : 'javascript:;',
target : '_self',
css : null,
element : null,
childElement : null,
parent : null,
children : null,
type : 'static',
click : null,
clickClose : false
},
push : function (item) ...{
var list = Object.prototype.toString.apply(item) === '[object Array]' ? item : [item];
for( var i=0; i< list.length; i++) ...{
var _item = list[i];
for( p in this.item) ...{
if( !_item.hasOwnProperty(p) ) _item[p] = this.item[p];
}
_item.element = null;
if( _item.name ) _item.html = _item.name;
if( _item.url ) _item.href = _item.url;
if( _item.type == 'static') ...{
this.list.push(_item);
}else ...{
if(this.dynamic == null) this.dynamic = new Array();
this.dynamic.push(_item);
}
}
return this;
},
bind : function ()...{
var _this = this;
for( var i=0; this.dynamic && i<this.dynamic.length; i++)
...{
var item = this.dynamic[i];
var itemElem = document.createElement('div');
itemElem.title = item.title;
itemElem.innerHTML = '<a href="'https://www.jb51.net/+item.href+'" target="'+item.target+'">'+item.html+'</a>';
itemElem.className = 'item ' + (item.css?' '+item.css:'');
item.element = itemElem;
if( item.click ) ...{
(function (item)...{
item.element.childNodes[0].onclick = function (e)...{
if( item.clickClose) _this.hidden();
return item.click(e);
};
})(item);
}
itemElem.contextmenu = item;
itemElem.onmouseover = function (e)...{ _this.hidden(item.level);};
var index = item.index || 0;
if( index >= this.settings.menu.childNodes.length)
index = this.settings.menu.childNodes.length - 1;
if( index < 0 )
this.settings.menu.appendChild(itemElem);
else
this.settings.menu.insertBefore(itemElem, this.settings.menu.childNodes[index]);
}
},
render : function ( container ) ...{
var _this = this;
container = container || this.settings.container;
this.settings.menu.innerHTML = '';
for( var i=0;i < this.list.length; i++)
...{
var item = this.list[i];
if ( item.parentId != 0 ) continue;
var itemElem = document.createElement('div');
itemElem.title = item.title;
itemElem.innerHTML = '<a href="'https://www.jb51.net/+item.href+'" target="'+item.target+'">'+item.html+'</a>';
itemElem.className = 'item ' + (item.css?' '+item.css:'');
var disabled = _this.hasClass(itemElem, 'disabled');
if ( disabled ) ...{
itemElem.childNodes[0].disabled = true;
itemElem.childNodes[0].className = 'disabled';
itemElem.childNodes[0].removeAttribute('href');
}
if ( _this.hasClass(itemElem, 'hidden') ) ...{
itemElem.style.display = 'none';
}
if( item.click ) ...{
(function (item)...{
item.element.childNodes[0].onclick = function (e)...{
if( item.clickClose) _this.hidden();
return item.click(e);
};
})(item);
}
itemElem.contextmenu = item;
itemElem.contextmenu.children = this.getChlid(item.id);
if( itemElem.contextmenu.children.length > 0 )
itemElem.childNodes[0].className += ' hasChild';
itemElem.onmouseover = function (e)...{ _this.renderChlid(this);};
this.settings.menu.appendChild(itemElem);
}
this.active[0] = ...{ element : _this.settings.menu };
this.settings.menu.contextmenu = _this;
container.oncontextmenu = function (e)...{
e = window.event || e;
var target = e.target || e.srcElement;
if( e.preventDefault)
e.preventDefault();
var mouseCoords = _this.mouseCoords(e);
_this.settings.menu.style.left = mouseCoords.x + _this.settings.excursionX + 'px';
_this.settings.menu.style.top = mouseCoords.y + _this.settings.excursionY + 'px';
_this.hidden();
_this.show(0, target);
return false;
};
this.addEvent(document, 'click', function (e)...{
e = window.event || e;
var target = e.target || e.srcElement;
var isContextMenu = !!target.contextmenu;
if( isContextMenu == false) ...{
var parent = target.parentNode;
while( parent!=null) ...{
if( parent.contextmenu) ...{
isContextMenu = true;
break;
}
parent = parent.parentNode;
}
}
if (isContextMenu == false) ...{
_this.hidden();
}
});
},
renderChlid : function ( target )...{
if(this.settings.locked) return;
var contextmenu = target.contextmenu;
var currentLevel = contextmenu.level;
this.hidden(currentLevel);
var hasChild = false;
for( var j=0;j<contextmenu.children.length;j++) ...{
if( (' '+contextmenu.children[j].css+' ').indexOf(' hidden ') == -1) ...{
hasChild = true;
break;
}
}
if( !hasChild) return;
var childElem = contextmenu.element;
if (childElem == null) ...{
childElem = document.createElement('div');
childElem.className = this.settings.css;
childElem.style.position = 'absolute';
childElem.style.zIndex = 1000 + contextmenu.level;
var _this = this;
for( var i=0;i < contextmenu.children.length; i++)
...{
var childItem = contextmenu.children[i];
var childItemElem = document.createElement('div');
childItemElem.title = childItem.title;
childItemElem.innerHTML = '<a href="'https://www.jb51.net/+childItem.href+'" target="'+childItem.target+'">'+childItem.html+'</a>';
childItemElem.className = 'item' + (childItem.css?' '+childItem.css : '');
var disabled = this.hasClass(childItemElem, 'disabled');
if ( disabled ) ...{
childItemElem.childNodes[0].disabled = true;
childItemElem.childNodes[0].removeAttribute('href');
}
if ( this.hasClass(childItemElem, 'hidden') ) ...{
childItemElem.style.display = 'none';
}
if( childItem.click ) ...{
(function (childItem)...{
childItem.element.childNodes[0].onclick = function (e)...{
if( childItem.clickClose) _this.hidden();
return childItem.click(e);
};
})(childItem);
}
childItem.parent = contextmenu;
childItemElem.contextmenu = childItem;
childItemElem.contextmenu.children = this.getChlid(childItem.id);
var hasChild = false;
for( var j=0; j<childItemElem.contextmenu.children.length; j++) ...{
if( (' '+childItemElem.contextmenu.children[j].css+' ').indexOf(' hidden ') == -1) ...{
hasChild = true;
break;
}
}
if( hasChild ) ...{
childItemElem.childNodes[0].className += ' hasChild';
}
childItemElem.onmouseover = function (e)...{ _this.renderChlid(this);};
childElem.appendChild(childItemElem);
}
document.body.insertBefore(childElem,document.body.childNodes[0]);
contextmenu.element = childElem;
}
this.active[currentLevel] = contextmenu;
var xy = this.elemOffset(target);
var x = xy.x + target.offsetWidth + this.settings.excursionX;
var y = xy.y + this.settings.excursionY;
childElem.style.left = x + 'px';
childElem.style.top = y + 'px';
childElem.style.display = 'block';
this.show(currentLevel);
},
getChlid : function (id) ...{
var list = new Array();
for( var i=0;i < this.list.length; i++)
...{
var item = this.list[i];
if( item.parentId == id)
...{
list.push(item);
}
}
return list;
},
show : function (level, target) ...{
if(this.settings.locked) return;
level = level || 0;
var item = this.active[level];
if ( level == 0 ) ...{
for( var i=0;this.dynamic && i < this.dynamic.length; i++)
...{
var dynamicItemElem = this.dynamic[i].element;
if( dynamicItemElem !=null) dynamicItemElem.parentNode.removeChild(dynamicItemElem);
}
if (this.dynamic) this.dynamic.length = 0;
this.onShow(target, this);
}
var menuElem = item.element;
menuElem.style.display = 'block';
var iframeElem = this.iframes[level];
if ( iframeElem == null) ...{
iframeElem = document.createElement('iframe');
iframeElem.scrolling = 'no';
iframeElem.frameBorder = 0;
iframeElem.style.cssText = 'position:absolute; overflow:hidden;';
document.body.insertBefore(iframeElem,document.body.childNodes[0]);
this.iframes.push(iframeElem);
}
iframeElem.width = menuElem.offsetWidth;
iframeElem.height = menuElem.offsetHeight;
var menuElemOffset = this.elemOffset(menuElem);
iframeElem.style.left = menuElemOffset.x + 'px';
iframeElem.style.top = menuElemOffset.y + 'px';
iframeElem.style.display = 'block';
},
onShow : function (target, _this) ...{
if( target.nodeType == 1 && target.tagName == 'A' && target.innerHTML.indexOf('.rar') != -1 )...{
//解压文件
_this.push( ...{
html : '解压缩到“'+target.innerHTML.substring(0,target.innerHTML.lastIndexOf('.'))+'\\”...',
click : function (e)...{
e = e || window.event;
var srcElement = e.srcElement || e.target;
srcElement.className = 'on';
srcElement.innerHTML = '解压缩到“'+target.innerHTML.substring(0,target.innerHTML.lastIndexOf('.'))+'\\”...';
var url = '/Ajax/FileZip.aspx?mode=unzip&files='+target.href.substring(target.href.replace('//','xx').indexOf('https://www.jb51.net/'));
if( typeof Ajax == 'undefined') return;
Ajax.get(url, function (data, _this)...{
_this.settings.locked = true;
eval(data);
if( rs.success ) ...{
location.reload();
}else...{
alert(rs.error);
_this.hidden();
}
}, _this);
srcElement.onclick = null;
_this.settings.locked = true;
},
clickClose : false,
index : 2,
type : 'dynamic'
});
}
else if( target.nodeType == 1 && target.title.indexOf('添加到') == 0) ...{
//添加单个压缩文件
_this.push( ...{
html : target.title,
title : target.title,
click : function (e)...{
var index = target.href.indexOf('?path=');
if( index != -1)...{
var fullName = target.href.substring(index+'?path='.length);
}else ...{
var fullName = target.href.substring(target.href.replace('//','xx').indexOf('https://www.jb51.net/'));
}
e = e || window.event;
var srcElement = e.srcElement || e.target;
srcElement.className = 'on';
srcElement.innerHTML = '正在添加到“'+fullName.substring(fullName.lastIndexOf('https://www.jb51.net/')+1)+'.rar”...';
var url = '/Ajax/FileZip.aspx?mode=zip&files='+fullName;
if( typeof Ajax == 'undefined') return;
Ajax.get(url, function (data, _this)...{
_this.settings.locked = true;
eval(data);
if( rs.success ) ...{
location.reload();
}else...{
alert(rs.error);
_this.hidden();
}
}, _this);
srcElement.onclick = null;
_this.settings.locked = true;
},
clickClose : false,
index : 2,
type : 'dynamic',
css : 'on'
});
}else ...{
//添加多个压缩文件
var fileName = '';
var files = new Array();
var ids = document.getElementsByName('ids');
for( var i=0; i<ids.length; i++) ...{
if( !ids[i].checked) continue;
var file = ids[i].value;
files.push(file);
if( files.length == 1) ...{
fileName = file.substring(file.lastIndexOf('https://www.jb51.net/')+1) + '.rar';
}
}
if( files.length > 0 )...{
_this.push( ...{
html : '添加'+files.length+'个文件到压缩包“'+fileName+'”',
click : function (e)...{
e = e || window.event;
var srcElement = e.srcElement || e.target;
srcElement.className = 'on';
srcElement.innerHTML = '正在添加到“'+fileName+'”...';
var url = '/Ajax/FileZip.aspx?mode=zip&files='+files.join('|');
if( typeof Ajax == 'undefined') return;
Ajax.get(url, function (data, _this)...{
_this.settings.locked = true;
eval(data);
if( rs.success ) ...{
location.reload();
}else...{
alert(rs.error);
_this.hidden();
}
}, _this);
srcElement.onclick = null;
_this.settings.locked = true;
},
clickClose : false,
index : 2,
type : 'dynamic'
});
}
}
if( target.nodeType == 1 && target.tagName == 'A') ...{
_this.push( ...{
html : '属性“'+target.innerHTML+'”',
href : target.href,
click : function (e)...{
prompt('属性“'+target.innerHTML+'”',target.href);
return false;
},
clickClose : true,
index : 3,
type : 'dynamic'
});
}
var selection = window.getSelection ? window.getSelection().toString() : document.selection.createRange().text;
if( selection ) ...{
_this.push( ...{
html : '复制“' + (selection.length > 15 ? selection.substring(0,12) + '...' : selection) +'”',
title : '复制“' + selection + '”',
click : function (e) ...{
if(window.clipboardData) ...{
window.clipboardData.clearData();
window.clipboardData.setData("Text", selection);
}else ...{
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
if (!clip || !trans) return;
trans.addDataFlavor('text/unicode');
var len = new Object();
var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
str.data = selection;
trans.setTransferData("text/unicode",str,selection.length*2);
var clipid=Components.interfaces.nsIClipboard;
if (!clip) return false;
clip.setData(trans,null,clipid.kGlobalClipboard);
}
},
clickClose : true,
index : 0,
type : 'dynamic'
});
}
_this.bind();
},
hidden : function (level) ...{
level = level || 0;
for( var i = level; i<this.active.length; i++) ...{
var item = this.active[i];
var iframeElem = this.iframes[i];
if ( iframeElem !=null)
iframeElem.style.display = 'none';
if(this.settings.locked) return;
var menuElem = item.element;
if ( menuElem !=null)
menuElem.style.display = 'none';
}
this.onHidden(level);
},
onHidden : function (level) ...{
},
hasClass : function (elem, name)
...{
return !!elem && (' '+elem.className+' ').indexOf(' '+name+' ') != -1;
},
elemOffset : function(elem)...{
var left = 0;
var top = 0;
while (elem.offsetParent)...{
left += elem.offsetLeft;
top += elem.offsetTop;
elem = elem.offsetParent;
}
left += elem.offsetLeft;
top += elem.offsetTop;
return ...{x:left, y:top};
},
mouseCoords : function (e)...{
if (e.pageX && e.pageY) ...{
return ...{
x: e.pageX,
y: e.pageY
};
}
var d = (document.documentElement && document.documentElement.scrollTop) ? document.documentElement : document.body;
return ...{
x: e.clientX + d.scrollLeft,
y: e.clientY + d.scrollTop
};
},
addEvent : function(target,eventType,func)...{
if(target.attachEvent)
...{
target.attachEvent("on" + eventType, func);
}else if(target.addEventListener)
...{
target.addEventListener(eventType == 'mousewheel' ? 'DOMMouseScroll' : eventType, func, false);
}
return this;
},
removeEvent : function(target,eventType,func)...{
if(target.detachEvent)
...{
target.detachEvent("on" + eventType, func);
}else if(target.removeEventListener)
...{
target.removeEventListener(eventType == 'mousewheel' ? 'DOMMouseScroll' : eventType, func, false);
}
return this;
}
}
演示地址
3.节点树(TreeMenu)
节点树(TreeMenu)是我们实际项目中运用得最多了，网上很著名的有梅花雪的MzTreeVew，听说对大数据量时做了一些优化，效率很高。但我不太喜欢拿来主义，有些东西既然我看不懂或还不明白它为什么要这么做，所以就想尝试着自己来"造轮子"。当然功能肯定是没有MzTreeVew的那么强大，大数据量时我也没有做效率测试，图片先借MzTreeVew的。
无限级节点树
要实现无限级的功能，如果没有什么小技巧，好象就只能递归了。不过需要注意一定要有个正确条件判断来return，避免死循环。从数据的存放结构来说，一般我们数据库里保存有id、name、parentId字段，树结构里仍然保存这种结构，在展开树节点的时候我们需要根据id获取它所有的子节点，并保存起来，避免第二次重复遍历。
层次关系结构
我这里是想说，呈现出来的HTML具有层次关系，每一个树节点对象有层次关系。HTML层次关系表现为子节点的元素一定是父节点的元素的子节点，本来我觉得这并不是必须的，后来我发现只有这样做才能保持子子节点的状态，比如我点击一级节点只需要展开所有的二级节点，三级或四级节点的状态不需要改变，HTML结构有这种层次关系支持就很容易实现。与之相对应的是树节点对象，它保存着父节点对象、子节点集合对象、引用元素等等，以方便递归调用，这些信息都被附加到对应的dom元素上。
带checkbox和radio选择
实际项目的需求都是复杂多变的，有时候我们需要提供radio单选功能，有时候可能需要提供checkbox多选功能，为了能在后台直接获取选择的值，提供带checkbox和radio选择功能也是必须的。当然，是否创建checkbox或radio我们可以在实例化时配置指定，每一个节点初始化时是否选中也可设置指定，这里需要注意的是我们直接创建checkbox和radio是不能指定name属性的，转个弯换种思路来实现即可。
复制代码 代码如下: