dragdrop.js

一个可以简单实现模块的拖曳、锁定、最大化、最小化控制的示例

var CDrag = Class.create();

CDrag.IE = /MSIE/.test(window.navigator.userAgent);

CDrag.load = function (obj_string, func, time) {
//加载对象
	var index = 0, timer = window.setInterval(function () {
		try {
			if (eval(obj_string + ".loaded")) {
				window.clearInterval(timer);
				func(eval("new " + obj_string));
			}
		} catch (exp) {}

		if (++ index == 20) window.clearInterval(timer);
	}, time + index * 3);
};

CDrag.database = {
//数据存储
	json : null,
	
	parse : function (id) {
	//查找资源
		var wc = this, json = wc.json, i;
		for (i in json) {
			if (json[i].id == id)
				return json[i];
		}
	}
};

CDrag.Ajax = Class.create();

Object.extend(CDrag.Ajax, {

	getTransport: function() {
		return Try.these(
			function () { return new ActiveXObject('Msxml2.XMLHTTP') },
			function () { return new ActiveXObject('Microsoft.XMLHTTP') },
			function () { return new XMLHttpRequest() }
		) || false;
	}
	
});

CDrag.Ajax.prototype = {

	initialize : function (url) {
	//初始化
		var wc = this;
		wc.ajax = CDrag.Ajax.getTransport();
	},
	
	load : function (func) {
		var wc = this, ajax = wc.ajax;
		if (ajax.readyState == 4 && ajax.status == 200)
			func(ajax.responseText);
	},
	
	send : function (url, func) {
		var wc = this, ajax = wc.ajax,
			//使用时间戳是为了避免缓存重复
			querys = url + "&" + new Date().getTime() + (10000 + parseInt(Math.random() * 10000));
		ajax.open("get", querys, true);
		ajax.onreadystatechange = wc.load.bind(wc, func);
		ajax.send(null);
	}
	
};

CDrag.Table = Class.create();

CDrag.Table.prototype = {
//列的拖拽暂时不考虑

	initialize : function () {
	//初始化
		var wc = this;
		wc.items = []; //创建列组
	},
	
	add : function () {
	//添加列
		var wc = this, id = wc.items.length, arg = arguments;
		return wc.items[id] = new CDrag.Table.Cols(id, wc, arg[0]);
	}
};

CDrag.Table.Cols = Class.create();

CDrag.Table.Cols.prototype = {
	
	initialize : function (id, parent, element) {
	//初始化
		var wc = this;
		wc.items = []; //创建列组
		wc.id = id;
		wc.parent = parent;
		wc.element = element;
	},
	
	add : function () {
	//添加行
		var wc = this, id = wc.items.length, arg = arguments;
		return wc.items[id] = new CDrag.Table.Rows(id, wc, arg[0], arg[1], arg[2]);
	},
	
	ins : function (num, row) {
	//插入行
		var wc = this, items = wc.items, i;
		
		if (row.parent == wc && row.id < num) num --; //同列向下移动的时候
		for (i = num ; i < items.length ; i ++) items[i].id ++;
		
		items.splice(num, 0, row);
		row.id = num, row.parent = wc;
		
		return row;
	},
	
	del : function (num) {
	//删除行
		var wc = this, items = wc.items, i;
		
		if (num >= items.length) return;
		for (i = num + 1; i < items.length ; i ++) items[i].id = i - 1;
		return items.splice(num, 1)[0];
	}
	
};

CDrag.Table.Rows = Class.create();

CDrag.Table.Rows.prototype = {
	
	
	initialize : function (id, parent, element, window, locks) {
	//初始化
		var wc = this, temp;
		
		wc.id = id;
		wc.parent = parent;
		wc.root_id = element;
		wc.window = window;
		wc.element = wc.element_init();
		
		temp = wc.element.childNodes[0];
		wc.title = temp.childNodes[4];
		wc.reduce = temp.childNodes[3];
		wc.lock = temp.childNodes[2], wc.locks = locks;
		wc.edit = temp.childNodes[1];
		wc.close = temp.childNodes[0];
		wc.content = wc.element.childNodes[1];
		
		wc.Class = wc.mousedown = wc.reduceFunc = wc.lockFunc = wc.editFunc = wc.closeFunc = null;
		
		wc.init();
		wc.load();
	},
	
	element_init : function () {
	//初始化元素
		var wc = this, div = $("root_row").cloneNode(true);
		
		wc.parent.element.appendChild(div);
		div.style.display = "block";
		return div;
	},
	
	init : function () {
	//初始化信息
		var wc = this;
		if (wc.window == 0) {
			wc.content.style.display = "none";
			wc.reduce.innerHTML = "放大";
		} else {
			wc.content.style.display = "block";
			wc.reduce.innerHTML = "缩小";
		}
		
		wc.lock.innerHTML = !wc.locks ? "锁定" : "解除";
	},
	
	load : function () {
	//获取相关信息
		var wc = this, info = CDrag.database.parse(wc.root_id), script;
		
		wc.title.innerHTML = info.title;
		
		if (info.src) {
			wc.content.innerHTML = "loading";
			script = document.createElement("script");
			script.src = info.src + ".js"//, script.defer = true;
			document.getElementsByTagName("head")[0].appendChild(script);
			CDrag.load(info.className, wc.upload.bind(wc), 5);
		} else	wc.content.innerHTML = info.className;
	},
	
	upload : function (obj) {
	/*加载类信息
		注：这里给行加入了一个扩展类，这里行的内容可以通过扩展类来控制^o^
		不过扩展类的格式必须有open方法和edit方法，还有类名.静态成员loaded = true；为了检测是否加载完毕
		扩展类需放到单独的.js文件里，然后从database结构体内设定其参数即可
	*/
		var wc = this;
		wc.Class = obj;
		wc.Class.parent = wc;
		wc.editFunc = Object.addEvent(wc.edit, ["onclick"], wc.lockF(wc.Class, wc.Class.edit, wc));
		
		//==Create by lhh,目的让.js获得一个额外的参数==//
		var tag=CDrag.database.parse(wc.root_id).tag;

		wc.Class.open(tag);
		//wc.Class.open();
	},
	
	lockF : function () {
	//检索锁定
		var wc = this, arg = $A(arguments), root = arg.shift(), func = arg.shift();
		return function () {
			if (!wc.locks) func.apply(root, arg.concat($A(arguments)));
		};
	}
	
};

CDrag.Add = Class.create();

CDrag.Add.prototype = {
	
	initialize : function (parent) {
	//初始化参数
		var wc = this;
		wc.div = document.createElement("div"); //最外层div
		wc.iframe = document.createElement("iframe"); //协助wc.div盖select的iframe
		wc.node = document.createElement("div"); //内容底层div
		wc.content = document.createElement("div"); //内容层div
		wc.button = document.createElement("button"); //内容处理按钮
		wc.parent = parent;
		wc.json = null;
		
		wc.button.onclick = wc.execute.bind(wc, wc.content); //向按钮指向方法
		wc.init_element();
	},
	
	init_element : function () {
	//初始化元素
		var wc = this;
		wc.div.setAttribute(CDrag.IE ? "className" : "class", "Dall_screen");
		wc.iframe.setAttribute(CDrag.IE ? "className" : "class", "Iall_screen");
		wc.node.setAttribute(CDrag.IE ? "className" : "class", "Nall_screen");
		wc.content.setAttribute(CDrag.IE ? "className" : "class", "Call_screen");
		wc.button.innerHTML = "执行";
		wc.node.appendChild(wc.content);
		wc.node.appendChild(wc.button);
	},
	
	init_json : function () {
	//初始化原始数据信息串
		var wc = this, parent = wc.parent,
			cols = parent.table.items, new_json = {}, init_json = CDrag.database.json, r, i, j;
			
		for (i = 0 ; i < init_json.length ; i ++) //便利原始数据
			new_json[init_json[i].id] = { id : init_json[i].id, row : null, title : init_json[i].title };
			
		for (i = 0 ; i < cols.length ; i ++) //便利修改生成的串的属性
			for (r = cols[i].items, j = 0 ; j < r.length ; j ++)
				new_json[r[j].root_id].row = r[j];
		return new_json;
	},
	
	init_node : function () {
	//初始化内容层div的数据
		var wc = this, json = wc.json = wc.init_json(), boxary = [], i;
		for (i in json)
			boxary[boxary.length] = [
				'<input type="checkbox"', json[i].row ? 'checked="checked"' : "",
				' value="', json[i].id, '" />&nbsp;&nbsp;', json[i].title, '<br \/>'
			].join("");

		wc.content.innerHTML = boxary.join(""); //写入内容层
	},
	
	execute : function (div) {
	//处理table类结构
		var wc = this, parent = wc.parent, json = wc.json, items = div.getElementsByTagName("input"), row, c, i;
		
		try {
		
			for (i = 0 ; i < items.length ; i ++) {
			
				if (items[i].type != "checkbox") continue;
				row = json[items[i].value];
				
				if ((!!row.row) != items[i].checked) {
					if (row.row) parent.remove(row.row); //删除
					else parent.add(parent.table.items[0].add(row.id, 1, false)); //向第一行追加数据
					c = true;
				}
				
			}
			
			div.innerHTML = "";
			if (c) parent.set_cookie();
			
		} catch (exp) {}
		wc.close();
	},
	
	add : function () {
	//添加数据
		var wc = this, div = wc.div, iframe = wc.iframe;
		wc.init_node();
		div.style.height = iframe.style.height = Math.max(document.documentElement.scrollHeight, document.documentElement.offsetHeight) + "px";
		div.style.width = iframe.style.width = Math.max(document.documentElement.scrollWidth, document.documentElement.offsetWidth) + "px";
		document.getElementsByTagName("html")[0].style.overflow = "hidden";