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"Fix" tight_layout for template backend. #17731

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Merged
merged 2 commits into from
Jun 24, 2020
Merged

"Fix" tight_layout for template backend. #17731

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9610a50
"Fix" tight_layout for template backend.
anntzer Jun 23, 2020
5f6f855
Fix _get_renderer for FigureCanvasBase.
anntzer Jun 24, 2020
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15 changes: 11 additions & 4 deletions lib/matplotlib/backend_bases.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1534,7 +1534,6 @@ def _get_renderer(figure, print_method=None):

If you need a renderer without any active draw methods use
renderer._draw_disabled to temporary patch them out at your call site.

"""
# This is implemented by triggering a draw, then immediately jumping out of
# Figure.draw() by raising an exception.
Expand All @@ -1545,15 +1544,23 @@ class Done(Exception):
def _draw(renderer): raise Done(renderer)

with cbook._setattr_cm(figure, draw=_draw):
orig_canvas = figure.canvas
if print_method is None:
fmt = figure.canvas.get_default_filetype()
print_method = getattr(figure.canvas, f"print_{fmt}")
# Even for a canvas' default output type, a canvas switch may be
# needed, e.g. for FigureCanvasBase.
print_method = getattr(
figure.canvas._get_output_canvas(None, fmt), f"print_{fmt}")
try:
print_method(io.BytesIO(), dpi=figure.dpi)
except Done as exc:
renderer, = figure._cachedRenderer, = exc.args

return renderer
return renderer
else:
raise RuntimeError(f"{print_method} did not call Figure.draw, so "
f"no renderer is available")
finally:
figure.canvas = orig_canvas


def _is_non_interactive_terminal_ipython(ip):
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1 change: 1 addition & 0 deletions lib/matplotlib/backends/backend_template.py
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Expand Up @@ -208,6 +208,7 @@ def print_foo(self, filename, *args, **kwargs):
to their original values after this call, so you don't need to
save and restore them.
"""
self.draw()

def get_default_filetype(self):
return 'foo'
Expand Down