[ExtJS] GridPanel 列自适应内容宽度

[ExtJS] GridPanel 列自适应[b]内容[/b]宽度

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[img]http://dl.iteye.com/upload/attachment/0072/1498/02a16ecd-0fd2-3455-b941-bd47765a755f.png[/img]

gridpanel beforerender

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woc : width of single chinese character , default 12.

wrap : 溢出则换行.

flex : 自动填充列