Class VPacker

lib/matplotlib/offsetbox.py:435–472

VPacker packs its children vertically, automatically adjusting their relative positions at draw time. .. code-block:: none +---------+ | Child 1 | | Child 2 | | Child 3 | +---------+

class VPacker(PackerBase):
    """
    VPacker packs its children vertically, automatically adjusting their
    relative positions at draw time.

    .. code-block:: none

       +---------+
       | Child 1 |
       | Child 2 |
       | Child 3 |
       +---------+
    """

    def _get_bbox_and_child_offsets(self, renderer):
        # docstring inherited
        dpicor = renderer.points_to_pixels(1.)
        pad = self.pad * dpicor
        sep = self.sep * dpicor

        if self.width is not None:
            for c in self.get_visible_children():
                if isinstance(c, PackerBase) and c.mode == "expand":
                    c.set_width(self.width)

        bboxes = [c.get_bbox(renderer) for c in self.get_visible_children()]
        (x0, x1), xoffsets = _get_aligned_offsets(
            [bbox.intervalx for bbox in bboxes], self.width, self.align)
        height, yoffsets = _get_packed_offsets(
            [bbox.height for bbox in bboxes], self.height, sep, self.mode)

        yoffsets = height - (yoffsets + [bbox.y1 for bbox in bboxes])
        ydescent = yoffsets[0]
        yoffsets = yoffsets - ydescent

        return (
            Bbox.from_bounds(x0, -ydescent, x1 - x0, height).padded(pad),
            [*zip(xoffsets, yoffsets)])


class HPacker(PackerBase):