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tacaswelltacaswell
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Merge pull request #4892 from joferkington/fix_nbagg_timer
FIX: single-shot timers in nbagg backend
2 parents f852c0c + 0c79c02 commit 7eadf59

2 files changed

Lines changed: 167 additions & 25 deletions

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‎lib/matplotlib/backends/backend_nbagg.py‎

Lines changed: 10 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -3,6 +3,7 @@
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# lib/matplotlib/backends/web_backend/nbagg_uat.ipynb to help verify
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# that changes made maintain expected behaviour.
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import datetime
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from base64 import b64encode
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import json
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import io
@@ -171,7 +172,6 @@ def clearup_closed(self):
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class TimerTornado(TimerBase):
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def _timer_start(self):
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import datetime
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self._timer_stop()
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if self._single:
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ioloop = tornado.ioloop.IOLoop.instance()
@@ -182,12 +182,18 @@ def _timer_start(self):
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self._timer = tornado.ioloop.PeriodicCallback(
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self._on_timer,
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self.interval)
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self._timer.start()
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self._timer.start()
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def _timer_stop(self):
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if self._timer is not None:
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if self._timer is None:
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return
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elif self._single:
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ioloop = tornado.ioloop.IOLoop.instance()
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ioloop.remove_timeout(self._timer)
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else:
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self._timer.stop()
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self._timer = None
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self._timer = None
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def _timer_set_interval(self):
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# Only stop and restart it if the timer has already been started

‎lib/matplotlib/backends/web_backend/nbagg_uat.ipynb‎

Lines changed: 157 additions & 21 deletions
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,23 @@
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{
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"kernelspec": {
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"display_name": "Python 2",
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"language": "python",
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"name": "python2"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 2
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython2",
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},
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"nbformat": 3,
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"nbformat_minor": 0,
@@ -17,7 +33,8 @@
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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{
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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{
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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{
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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"prompt_number": null
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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{
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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"cell_type": "markdown",
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],
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"outputs": [],
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"prompt_number": null
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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},
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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},
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],
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"language": "python",
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"outputs": [],
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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"prompt_number": null
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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"cell_type": "markdown",
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],
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"language": "python",
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"metadata": {},
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"outputs": []
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"outputs": [],
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"prompt_number": null
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### UAT 17 - Timers\n",
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"\n",
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"Single-shot timers follow a completely different code path in the nbagg backend than regular timers (such as those used in the animation example above.) The next set of tests ensures that both \"regular\" and \"single-shot\" timers work properly.\n",
484+
"\n",
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"The following should show a simple clock that updates twice a second:"
486+
]
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},
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{
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"cell_type": "code",
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"collapsed": true,
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"input": [
492+
"import time\n",
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"\n",
494+
"fig, ax = plt.subplots()\n",
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"text = ax.text(0.5, 0.5, '', ha='center')\n",
496+
"\n",
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"def update(text):\n",
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" text.set(text=time.ctime())\n",
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" text.axes.figure.canvas.draw()\n",
500+
" \n",
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"timer = fig.canvas.new_timer(500, [(update, [text], {})])\n",
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"timer.start()\n",
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"plt.show()"
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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"prompt_number": null
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"However, the following should only update once and then stop:"
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]
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},
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{
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"cell_type": "code",
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"collapsed": true,
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"input": [
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"fig, ax = plt.subplots()\n",
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"text = ax.text(0.5, 0.5, '', ha='center') \n",
523+
"timer = fig.canvas.new_timer(500, [(update, [text], {})])\n",
524+
"\n",
525+
"timer.single_shot = True\n",
526+
"timer.start()\n",
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"\n",
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"plt.show()"
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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"prompt_number": null
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"And the next two examples should never show any visible text at all:"
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]
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},
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{
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"cell_type": "code",
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"collapsed": true,
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"input": [
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"fig, ax = plt.subplots()\n",
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"text = ax.text(0.5, 0.5, '', ha='center')\n",
548+
"timer = fig.canvas.new_timer(500, [(update, [text], {})])\n",
549+
"\n",
550+
"timer.start()\n",
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"timer.stop()\n",
552+
"\n",
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"plt.show()"
554+
],
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"language": "python",
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"metadata": {},
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"outputs": [],
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"prompt_number": null
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},
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{
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"cell_type": "code",
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"collapsed": true,
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"input": [
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"fig, ax = plt.subplots()\n",
565+
"text = ax.text(0.5, 0.5, '', ha='center')\n",
566+
"timer = fig.canvas.new_timer(500, [(update, [text], {})])\n",
567+
"\n",
568+
"timer.single_shot = True\n",
569+
"timer.start()\n",
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"timer.stop()\n",
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"\n",
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"plt.show()"
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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"prompt_number": null
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}
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],
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"metadata": {}
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}
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]
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}
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}

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