griddata
griddata-
To specify the properties of each cell individually , GridLayout uses a GridData class .
要分别指定每个单元的属性，GridLayout使用了GridData类。
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To provide this type of refined control for each cell , the controls added to a GridLayout managed composite can have instances of GridData ( a LayoutData sub-class ) .
为了给每个单元格提供这种精确控制，添加到GridLayout的托管复合控件的控件可以拥有GridData实例（LayoutData的子类）。