VerticalBoxLayout.setCellHAlign

Sets the Horizontal alignment for each child control within its containing table cell.

Supported values:

Value	Constant
	ControlConstants.HORIZONTAL_ALIGNMENT_NONE
Center	ControlConstants.HORIZONTAL_ALIGNMENT_CENTER
Left	ControlConstants.HORIZONTAL_ALIGNMENT_LEFT
Right	ControlConstants.HORIZONTAL_ALIGNMENT_RIGHT
Fill	ControlConstants.HORIZONTAL_ALIGNMENT_FILL

Setting a value of null removes any existing value for the property.

Further documentation.

Example:

 controls.PANEL1.layout.setCellHAlign(ControlConstants.HORIZONTAL_ALIGNMENT_CENTER);