Use the TableColumn class to define each column width and its title, as shown in Listing 2.
使用 TableColumn 类定义每个列的宽度及其标题，如清单 2 所示。
2
For example, your application may use a series of pop-up Windows using the Ext.Window class, but these Windows will always have the same width and height values.
To illustrate this, let's first define a simple RectangularObject class, which exposes three key properties to the configuration API: the length, width, and height.