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原文地址 文章日期：2006/09/25/
新版.32 的YUI-EXT包含了GIRD事件機(jī)制的重要升級(jí)。許多新事件現(xiàn)在可以用了，監(jiān)聽(tīng)事件的機(jī)制也改變了（盡管它仍然向后兼容）。
偵聽(tīng)事件的方法
鑒于 YAHOO.util.CustomEvent只提供簡(jiǎn)單的訪問(wèn)，Grid和相關(guān)的對(duì)象擴(kuò)展了新的方法來(lái)偵聽(tīng)事件，這些事件你應(yīng)該是熟悉的。它們是：
- 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偵聽(tīng)
- on(eventName, fn, scope, override) - addListener 快捷方式
這些方法與YAHOO.uitl.Event一樣，有相同的署名（signatures）。
onRowSelect事件的偵聽(tīng)：
var sm = grid.getSelectionModel(); sm.addListener('rowselect', myHandler);這是GIRD暴露事件的列表和參數(shù)簡(jiǎn)介：
- "this" 指的是Grid對(duì)象； - "e" 指的是 YAHOO.ext.EventObject (常規(guī)化事件對(duì)象) ，除了Drag & Drop對(duì)象是標(biāo)準(zhǔn)瀏覽器事件對(duì)象。- "dd" 指的是Grid的YAHOO.ext.GridDD對(duì)象。譯注：下面事件解釋以原文方式提供以便讀者準(zhǔn)確理解：
- 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 = ... // 這里注冊(cè)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
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 JavaScript技術(shù)：Gird事件機(jī)制初級(jí)讀本，轉(zhuǎn)載需保留來(lái)源！
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