Function plot_children

lib/matplotlib/_layoutgrid.py:500–547

Simple plotting to show where boxes are.

(fig, lg=None, level=0)

def plot_children(fig, lg=None, level=0):
    """Simple plotting to show where boxes are."""
    if lg is None:
        _layoutgrids = fig.get_layout_engine().execute(fig)
        lg = _layoutgrids[fig]
    colors = mpl.rcParams["axes.prop_cycle"].by_key()["color"]
    col = colors[level]
    for i in range(lg.nrows):
        for j in range(lg.ncols):
            bb = lg.get_outer_bbox(rows=i, cols=j)
            fig.add_artist(
                mpatches.Rectangle(bb.p0, bb.width, bb.height, linewidth=1,
                                   edgecolor='0.7', facecolor='0.7',
                                   alpha=0.2, transform=fig.transFigure,
                                   zorder=-3))
            bbi = lg.get_inner_bbox(rows=i, cols=j)
            fig.add_artist(
                mpatches.Rectangle(bbi.p0, bbi.width, bbi.height, linewidth=2,
                                   edgecolor=col, facecolor='none',
                                   transform=fig.transFigure, zorder=-2))

            bbi = lg.get_left_margin_bbox(rows=i, cols=j)
            fig.add_artist(
                mpatches.Rectangle(bbi.p0, bbi.width, bbi.height, linewidth=0,
                                   edgecolor='none', alpha=0.2,
                                   facecolor=[0.5, 0.7, 0.5],
                                   transform=fig.transFigure, zorder=-2))
            bbi = lg.get_right_margin_bbox(rows=i, cols=j)
            fig.add_artist(
                mpatches.Rectangle(bbi.p0, bbi.width, bbi.height, linewidth=0,
                                   edgecolor='none', alpha=0.2,
                                   facecolor=[0.7, 0.5, 0.5],
                                   transform=fig.transFigure, zorder=-2))
            bbi = lg.get_bottom_margin_bbox(rows=i, cols=j)
            fig.add_artist(
                mpatches.Rectangle(bbi.p0, bbi.width, bbi.height, linewidth=0,
                                   edgecolor='none', alpha=0.2,
                                   facecolor=[0.5, 0.5, 0.7],
                                   transform=fig.transFigure, zorder=-2))
            bbi = lg.get_top_margin_bbox(rows=i, cols=j)
            fig.add_artist(
                mpatches.Rectangle(bbi.p0, bbi.width, bbi.height, linewidth=0,
                                   edgecolor='none', alpha=0.2,
                                   facecolor=[0.7, 0.2, 0.7],
                                   transform=fig.transFigure, zorder=-2))
    for ch in lg.children.flat:
        if ch is not None:
            plot_children(fig, ch, level=level+1)