Adds a control to the box as a spacer. If true, begin will insert the spacer control in front of other children.
The alignment of the container's children (must be one of constant ALIGN_BEGIN, constant ALIGN_CENTER or constant ALIGN_END).
Construct a new instance of BoxContainer. Note: use memnew!BoxContainer instead.
Base class for box containers.
Arranges child controls vertically or horizontally, and rearranges the controls automatically when their minimum size changes.