Alignment of the text in the cell. Applies to the header as well as all data in this column.
the name displayed in the header
The default width, in pixels. As a special case, you can set this to -1 if you want the system to try to automatically size the width to fit visible content. If it can't, it will try to pick a sensible default size.
After all the pixel widths have been assigned, any left over space is divided up among all columns and distributed to according to the widthPercent field.
Passed to setColumnInfo