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Fix tight-bbox computation of HostAxes. #30099

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Fix tight-bbox computation of HostAxes. #30099

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3 changes: 3 additions & 0 deletions lib/mpl_toolkits/axes_grid1/parasite_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,9 @@ def clear(self):
self._parent_axes.callbacks._connect_picklable(
"ylim_changed", self._sync_lims)

def get_axes_locator(self):
return self._parent_axes.get_axes_locator()

def pick(self, mouseevent):
# This most likely goes to Artist.pick (depending on axes_class given
# to the factory), which only handles pick events registered on the
Expand Down
23 changes: 22 additions & 1 deletion lib/mpl_toolkits/axes_grid1/tests/test_axes_grid1.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@
from matplotlib.backend_bases import MouseEvent
from matplotlib.colors import LogNorm
from matplotlib.patches import Circle, Ellipse
from matplotlib.transforms import Bbox, TransformedBbox
from matplotlib.transforms import Affine2D, Bbox, TransformedBbox
from matplotlib.testing.decorators import (
check_figures_equal, image_comparison, remove_ticks_and_titles)

Expand All @@ -26,6 +26,7 @@
from mpl_toolkits.axes_grid1.axes_rgb import RGBAxes
from mpl_toolkits.axes_grid1.inset_locator import (
zoomed_inset_axes, mark_inset, inset_axes, BboxConnectorPatch)
from mpl_toolkits.axes_grid1.parasite_axes import HostAxes
import mpl_toolkits.axes_grid1.mpl_axes
import pytest

Expand Down Expand Up @@ -467,6 +468,26 @@ def test_gettightbbox():
[-17.7, -13.9, 7.2, 5.4])


def test_gettightbbox_parasite():
fig = plt.figure()

y0 = 0.3
horiz = [Size.Scaled(1.0)]
vert = [Size.Scaled(1.0)]
ax0_div = Divider(fig, [0.1, y0, 0.8, 0.2], horiz, vert)
ax1_div = Divider(fig, [0.1, 0.5, 0.8, 0.4], horiz, vert)

ax0 = fig.add_subplot(
xticks=[], yticks=[], axes_locator=ax0_div.new_locator(nx=0, ny=0))
ax1 = fig.add_subplot(
axes_class=HostAxes, axes_locator=ax1_div.new_locator(nx=0, ny=0))
aux_ax = ax1.get_aux_axes(Affine2D())

fig.canvas.draw()
rdr = fig.canvas.get_renderer()
assert rdr.get_canvas_width_height()[1] * y0 / fig.dpi == fig.get_tightbbox(rdr).y0


@pytest.mark.parametrize("click_on", ["big", "small"])
@pytest.mark.parametrize("big_on_axes,small_on_axes", [
("gca", "gca"),
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