NewPainter constructs a new Box painter with the passed options and fills in defaults for missing fields.

AlignmentBottom pulls all boxes to the canvas's lower boundary.

AlignmentCenter centers all boxes in the canvas's horizontal center axis.

AlignmentEmpty is used for catching unitialized alignment.

AlignmentTop pulls all boxes to the canvas's upper boundary.

DefaultAlignment for boxes is center.

DefaultColor for boxes is black.

DefaultGap of each box is 10px.

DefaultHeight of a canvas is 200px.

DefaultRounded rounding ratio is 10px.

DefaultWidth of each box is 20px.

BoxPainter is the struct containing context for drawing a waveform as SVG rectangles.

Alignment is the categorical type for determining the box alignment axis.