VerticalBoxLayout.setHAlign

Sets the Horizontal alignment for all child content where all child controls are aligned as a single block.

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.setHAlign(ControlConstants.HORIZONTAL_ALIGNMENT_CENTER);