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
- JS option location 页面跳转实现代码
- ExtJS 简介 让你知道extjs是什么
- ExtJs 学习笔记 Hello World!
- ExtJs 学习笔记基础篇 Ext组件的使用
- ExtJs 学习笔记 Ext.Panle Ext.TabPanel Ext.Viewport
- 漂亮的脚本日历,和大家分享
- JS Tween 颜色渐变
- js 图片轮播(5张图片)
- 开发跨浏览器javascript常见注意事项
- 通用JS事件写法实现代码
- Js 订制自己的AlertBox(信息提示框)
- js 浮动层菜单收藏
- JavaScript入门教程(10) 认识其他对象
- JQuery 常用方法基础教程
- jQuery 页面载入进度条实现代码
- jQuery Ajax 全解析
- CSS+Table图文混排中实现文本自适应图片宽度（超简单+跨所有浏览器）
- Ext JS Grid在IE6 下宽度的问题解决方法
- js window.event对象详尽解析
- JavaScript 悬浮窗口实现代码
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: 235 ::
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
