繁體中文当前位置: 首页 > 图文教程 > 网络编程 > Javascript > Gird事件机制初级读本
- Javascript
- JavaScript 复制功能代码 兼容多浏览器
- 图片与文字半透明效果 鼠标移上不透明
- javascript 模拟Marquee文字向左均匀滚动代码
- 纯CSS 链接悬停提示效果代码
- JS、CSS文字切换，定时交替，代码精简
- Javascript 仿歌词智能滚动代码
- javascript 表单中浏览文件的“浏览”按钮修改
- 让你的网站可编辑的实现js代码
- Javascript var变量隐式声明方法
- JS CSS制作饱含热情的镶边文字闪烁特效
- Js 实现文字爬楼滚动效果 结合文本框
- 随日期每天自动变换的文本的js特效
- 一个链接按两种方式打开两个网址的方法
- Js文字背景行如流水特效
- 让链接必须按先后顺序点击的JS代码
- 单选按钮决定链接的网址
- JavaScript 点击插入文字
- 获取网站跟路径的javascript代码(站点及虚拟目录)
- JS 用6N±1法求素数 实例教程
- javascript 添加和移除函数的通用方法
Javascript 中的 Gird事件机制初级读本
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-09-12 浏览: 153 ::
收藏到网摘: n/a
原文地址 文章日期：2006/09/25/
新版.32 的YUI-EXT包含了GIRD事件机制的重要升级。许多新事件现在可以用了，监听事件的机制也改变了（尽管它仍然向后兼容）。
侦听事件的方法
鉴于 YAHOO.util.CustomEvent只提供简单的访问，Grid和相关的对象扩展了新的方法来侦听事件，这些事件你应该是熟悉的。它们是：
- addListener(eventName, fn, scope, override) - "eventName" should be one of the events defined below. "fn" is the function to call when the event occurs. "scope" is an optional object providing the scope (this) of the function. "override" is whether or not to apply that scope and is only there for backwards compatibility.
- removeListener(eventName, fn, scope) -移除前先提交的事件侦听
- on(eventName, fn, scope, override) - addListener 快捷方式
这些方法与YAHOO.uitl.Event一样，有相同的署名（signatures）。
onRowSelect事件的侦听：
var sm = grid.getSelectionModel();
sm.addListener('rowselect', myHandler);
这是GIRD暴露事件的列表和参数简介：
- "this" 指的是Grid对象；
- "e" 指的是 YAHOO.ext.EventObject (常规化事件对象) ，除了Drag & Drop对象是标准浏览器事件对象。
- "dd" 指的是Grid的YAHOO.ext.GridDD对象。
译注：下面事件解释以原文方式提供以便读者准确理解：
- cellclick - (this, rowIndex, columnIndex, e) - Fires when a cell is clicked
- celldblclick - (this, rowIndex, columnIndex, e) - Fires when a cell is double clicked
- rowclick - (this, rowIndex, e) - Fires when a row is clicked
- rowdblclick - (this, rowIndex, e) - Fires when a row is double clicked
- headerclick - (this, columnIndex, e) - Fires when a header is clicked
- rowcontextmenu - (this, rowIndex, e) - Fires when a row is right clicked
- headercontextmenu - (this, columnIndex, e) - Fires when a header is right clicked
- beforeedit - (this, rowIndex, columnIndex, e) - Fires just before editing is started on a cell
- afteredit - (this, rowIndex, columnIndex, e) - Fires immediately after a cell is edited
- bodyscroll - (scrollLeft, scrollTop) - Fires when the grid's body is scrolled
- columnresize - (columnIndex, newSize) Fires when the user resizes a column.
- startdrag - (this, dd, e) - Fires when row(s) start being dragged
- enddrag - (this, dd, e) - Fires when a drag operation is complete
- dragdrop - (this, dd, targetId, e) - Fires when dragged row(s) are dropped on a valid DD target
- dragover - (this, dd, targetId, e) Fires while row(s) are being dragged. "targetId" is the id of the Yahoo.util.DD object the selected rows are being dragged over.
- dragenter - (this, dd, targetId, e) - Fires when the dragged row(s) first cross another DD target while being dragged
- dragout - (this, dd, targetId, e) - Fires when the dragged row(s) leave another DD target while being dragged
Gird事件的例子
function onCellClick(grid, rowIndex, colIndex, e){ alert('Cell at row ' + rowIndex + ', column ' + colIndex + ' was clicked!'); } var grid = ... // 这里注册事件 grid.addListener('cellclick', onCellClick);
普通Grid事件
Since there is no way to envision everything you may want to do with the grid, I've also exposed direct access to many of the grid's raw events. All of these events pass one parameter to their handler: "e" a YAHOO.ext.EventObject.
- click
- dblclick
- mousedown
- mouseup
- mouseover
- mouseout
- keypress
- keydown
LoadableDataModel (from which XMLDataModel and JSONDataModel are derived) picked up a useful new event:
beforeload - Fires right before the model starts fetching remote data.
You could use this event combined with the load event to hide/show a loading indicator.
var img = getEl('loading-indicator'); var dm = grid.getDataModel(); dm.addListener('beforeload', img.show, img, true); dm.addListener('load', img.hide, img, true);Hopefully this can get you started with the new event system. If you have any questions, feel free to post in the Help Forum and I will help you out.
Jack
评论 (0) All
