diff --git a/lib/matplotlib/backends/backend_nbagg.py b/lib/matplotlib/backends/backend_nbagg.py
index 61db60accc62..8c9093fddc34 100644
--- a/lib/matplotlib/backends/backend_nbagg.py
+++ b/lib/matplotlib/backends/backend_nbagg.py
@@ -142,7 +142,7 @@ def remove_comm(self, comm_id):
class FigureCanvasNbAgg(FigureCanvasWebAggCore):
- _timer_cls = TimerTornado
+ pass
class CommSocket:
diff --git a/lib/matplotlib/backends/backend_webagg.py b/lib/matplotlib/backends/backend_webagg.py
index 4400fe5234cb..7f43187ac65f 100644
--- a/lib/matplotlib/backends/backend_webagg.py
+++ b/lib/matplotlib/backends/backend_webagg.py
@@ -48,12 +48,7 @@ def run(self):
class FigureCanvasWebAgg(core.FigureCanvasWebAggCore):
- _timer_cls = TimerTornado
-
- def show(self):
- # show the figure window
- global show # placates pyflakes: created by @_Backend.export below
- show()
+ pass
class WebAggApplication(tornado.web.Application):
diff --git a/lib/matplotlib/backends/backend_webagg_core.py b/lib/matplotlib/backends/backend_webagg_core.py
index 0c1b1e17268a..192789cacf07 100644
--- a/lib/matplotlib/backends/backend_webagg_core.py
+++ b/lib/matplotlib/backends/backend_webagg_core.py
@@ -117,8 +117,43 @@ def _handle_key(key):
return key
+class TimerTornado(backend_bases.TimerBase):
+ def __init__(self, *args, **kwargs):
+ self._timer = None
+ super().__init__(*args, **kwargs)
+
+ def _timer_start(self):
+ self._timer_stop()
+ if self._single:
+ ioloop = tornado.ioloop.IOLoop.instance()
+ self._timer = ioloop.add_timeout(
+ datetime.timedelta(milliseconds=self.interval),
+ self._on_timer)
+ else:
+ self._timer = tornado.ioloop.PeriodicCallback(
+ self._on_timer,
+ max(self.interval, 1e-6))
+ self._timer.start()
+
+ def _timer_stop(self):
+ if self._timer is None:
+ return
+ elif self._single:
+ ioloop = tornado.ioloop.IOLoop.instance()
+ ioloop.remove_timeout(self._timer)
+ else:
+ self._timer.stop()
+ self._timer = None
+
+ def _timer_set_interval(self):
+ # Only stop and restart it if the timer has already been started
+ if self._timer is not None:
+ self._timer_stop()
+ self._timer_start()
+
+
class FigureCanvasWebAggCore(backend_agg.FigureCanvasAgg):
- supports_blit = True
+ _timer_cls = TimerTornado
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
@@ -478,8 +513,7 @@ def get_javascript(cls, stream=None):
for filetype, ext in sorted(FigureCanvasWebAggCore.
get_supported_filetypes_grouped().
items()):
- if ext[0] != 'pgf': # pgf does not support BytesIO
- extensions.append(ext[0])
+ extensions.append(ext[0])
output.write("mpl.extensions = {0};\n\n".format(
json.dumps(extensions)))
@@ -499,41 +533,6 @@ def _send_event(self, event_type, **kwargs):
s.send_json(payload)
-class TimerTornado(backend_bases.TimerBase):
- def __init__(self, *args, **kwargs):
- self._timer = None
- super().__init__(*args, **kwargs)
-
- def _timer_start(self):
- self._timer_stop()
- if self._single:
- ioloop = tornado.ioloop.IOLoop.instance()
- self._timer = ioloop.add_timeout(
- datetime.timedelta(milliseconds=self.interval),
- self._on_timer)
- else:
- self._timer = tornado.ioloop.PeriodicCallback(
- self._on_timer,
- max(self.interval, 1e-6))
- self._timer.start()
-
- def _timer_stop(self):
- if self._timer is None:
- return
- elif self._single:
- ioloop = tornado.ioloop.IOLoop.instance()
- ioloop.remove_timeout(self._timer)
- else:
- self._timer.stop()
- self._timer = None
-
- def _timer_set_interval(self):
- # Only stop and restart it if the timer has already been started
- if self._timer is not None:
- self._timer_stop()
- self._timer_start()
-
-
@_Backend.export
class _BackendWebAggCoreAgg(_Backend):
FigureCanvas = FigureCanvasWebAggCore
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