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  253.   <h1>Source code for CBD.realtime.plotting</h1><div class="highlight"><pre>
    254. 

  254. <span></span>
    255. 

  255. <span class="k">try</span><span class="p">:</span>
    256. 

  256. 	<span class="kn">import</span> <span class="nn">matplotlib.animation</span> <span class="k">as</span> <span class="nn">animation</span>
    257. 

  257. 	<span class="n">_MPL_FOUND</span> <span class="o">=</span> <span class="kc">True</span>
    258. 

  258. <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
    259. 

  259. 	<span class="n">_MPL_FOUND</span> <span class="o">=</span> <span class="kc">False</span>
    260. 

  260. 

  261. <span class="k">try</span><span class="p">:</span>
    262. 

  262. 	<span class="kn">from</span> <span class="nn">bokeh.plotting</span> <span class="kn">import</span> <span class="n">curdoc</span>
    263. 

  263. 	<span class="n">_BOKEH_FOUND</span> <span class="o">=</span> <span class="kc">True</span>
    264. 

  264. <span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
    265. 

  265. 	<span class="n">_BOKEH_FOUND</span> <span class="o">=</span> <span class="kc">False</span>
    266. 

  266. 

  267. <span class="c1"># TODO: Bokeh (see TODOs), GGplot, Seaborn</span>
    268. 

  268. <span class="c1"># Note: Seaborn is built on top of matplotlib</span>
    269. 

  269. <span class="c1"># TODO: Jupyter?</span>
    270. 

  270. 

  271. <div class="viewcode-block" id="Backend"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.Backend">[docs]</a><span class="k">class</span> <span class="nc">Backend</span><span class="p">:</span>
    272. 

  272. 	<span class="sd">&quot;&quot;&quot;</span>
    273. 

  273. <span class="sd">	In which framework the plots need to be made.</span>
    274. 

  274. 

  275. <span class="sd">	Note:</span>
    276. 

  276. <span class="sd">		Some attributes won&#39;t be available if the corresponding framework is not installed.</span>
    277. 

  277. <span class="sd">	&quot;&quot;&quot;</span>
    278. 

  278. 	<span class="k">if</span> <span class="n">_MPL_FOUND</span><span class="p">:</span>
    279. 

  279. 		<span class="n">MPL</span>         <span class="o">=</span> <span class="mi">1</span>
    280. 

  280. 		<span class="sd">&quot;&quot;&quot; : : Use `Matplotlib &lt;https://matplotlib.org/&gt;`_.&quot;&quot;&quot;</span>
    281. 

  281. 		<span class="n">MATPLOTLIB</span>  <span class="o">=</span> <span class="mi">1</span>
    282. 

  282. 		<span class="sd">&quot;&quot;&quot; : : Use `Matplotlib &lt;https://matplotlib.org/&gt;`_.&quot;&quot;&quot;</span>
    283. 

  283. 

  284. 	<span class="k">if</span> <span class="n">_BOKEH_FOUND</span><span class="p">:</span>
    285. 

  285. 		<span class="n">BOKEH</span>       <span class="o">=</span> <span class="mi">2</span>
    286. 

  286. 		<span class="sd">&quot;&quot;&quot;</span>
    287. 

  287. <span class="sd">		 : : Use `Bokeh &lt;//docs.bokeh.org/en/latest/index.html&gt;`_.</span>
    288. 

  288. <span class="sd">		</span>
    289. 

  289. <span class="sd">		Important:</span>
    290. 

  290. <span class="sd">			For :code:`BOKEH`, a server must be started with:</span>
    291. 

  291. <span class="sd">	</span>
    292. 

  292. <span class="sd">			.. code-block:: bash</span>
    293. 

  293. <span class="sd">	</span>
    294. 

  294. <span class="sd">			   bokeh serve</span>
    295. 

  295. <span class="sd">	</span>
    296. 

  296. <span class="sd">			|</span>
    297. 

  297. <span class="sd">			</span>
    298. 

  298. <span class="sd">		Attention:</span>
    299. 

  299. <span class="sd">			This backend is still in beta.</span>
    300. 

  300. <span class="sd">		&quot;&quot;&quot;</span>
    301. 

  301. 

  302. <div class="viewcode-block" id="Backend.exists"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.Backend.exists">[docs]</a>	<span class="nd">@staticmethod</span>
    303. 

  303. 	<span class="k">def</span> <span class="nf">exists</span><span class="p">(</span><span class="n">value</span><span class="p">):</span>
    304. 

  304. 		<span class="sd">&quot;&quot;&quot;</span>
    305. 

  305. <span class="sd">		Checks that a given backend exists.</span>
    306. 

  306. <span class="sd">		&quot;&quot;&quot;</span>
    307. 

  307. 		<span class="k">return</span> <span class="n">value</span> <span class="ow">in</span> <span class="p">[</span><span class="nb">getattr</span><span class="p">(</span><span class="n">Backend</span><span class="p">,</span> <span class="n">x</span><span class="p">)</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="nb">dir</span><span class="p">(</span><span class="n">Backend</span><span class="p">)</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">x</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s2">&quot;_&quot;</span><span class="p">)</span> <span class="ow">and</span> \
    308. 

  308. 		                                                                <span class="ow">not</span> <span class="n">callable</span><span class="p">(</span><span class="nb">getattr</span><span class="p">(</span><span class="n">Backend</span><span class="p">,</span> <span class="n">x</span><span class="p">))]</span></div></div>
    309. 

  309. 

  310. 

  311. <div class="viewcode-block" id="PlotHandler"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotHandler">[docs]</a><span class="k">class</span> <span class="nc">PlotHandler</span><span class="p">:</span>
    312. 

  312. 	<span class="sd">&quot;&quot;&quot;</span>
    313. 

  313. <span class="sd">	Handles Real-Time plotting, independent of a plotting framework.</span>
    314. 

  314. 

  315. <span class="sd">	Every :code:`interval` time, data will be polled from the :code:`object`,</span>
    316. 

  316. <span class="sd">	w.r.t. the given plotting :code:`backend`. The handler will use the knowledge</span>
    317. 

  317. <span class="sd">	of a backend to determine how the given :code:`figure` must be updated.</span>
    318. 

  318. 

  319. <span class="sd">	This class can be used in any simulation context, where plotting data can be</span>
    320. 

  320. <span class="sd">	polled from an object or a resource.</span>
    321. 

  321. 

  322. <span class="sd">	Note:</span>
    323. 

  323. <span class="sd">		While technically framework-independent, matplotlib has the least external</span>
    324. 

  324. <span class="sd">		overhead in your code.</span>
    325. 

  325. 

  326. <span class="sd">	Tip:</span>
    327. 

  327. <span class="sd">		When using multiple plots/plotting instances, you should make use of the</span>
    328. 

  328. <span class="sd">		:class:`PlotManager`.</span>
    329. 

  329. 

  330. <span class="sd">	Warning:</span>
    331. 

  331. <span class="sd">		Bokeh is still in beta. Not all features will work as required.</span>
    332. 

  332. 

  333. <span class="sd">	Raises:</span>
    334. 

  334. <span class="sd">		AssertionError: if the backend cannot be located.</span>
    335. 

  335. 

  336. <span class="sd">	Args:</span>
    337. 

  337. <span class="sd">		object (Any):       The object from which data needs to be polled. By default,</span>
    338. 

  338. <span class="sd">							the :code:`data_xy` attribute will be used on the object,</span>
    339. 

  339. <span class="sd">							which should result in a 2xN array in the form of</span>
    340. 

  340. <span class="sd">							:code:`([x1, x2, x3...], [y1, y2, y3...])`. Change this</span>
    341. 

  341. <span class="sd">							behaviour with the :func:`set_data_getter` function.</span>
    342. 

  342. <span class="sd">		figure:             The figure object required for plotting. This has been made</span>
    343. 

  343. <span class="sd">							externally to allow for full manipulation of the plotting</span>
    344. 

  344. <span class="sd">							framework itself. The following explains the axxepted data</span>
    345. 

  345. <span class="sd">							types:</span>
    346. 

  346. 

  347. <span class="sd">							- **matplotlib:** Tuple (pair) of :code:`(Figure, Axes)`</span>
    348. 

  348. <span class="sd">							- **bokeh:** :code:`Figure`</span>
    349. 

  349. 

  350. <span class="sd">		kind (PlotKind):    What needs to be plotted. See :class:`PlotKind` for more</span>
    351. 

  351. <span class="sd">							info.</span>
    352. 

  352. <span class="sd">		interval (int):     Amount of milliseconds between plot refreshes.</span>
    353. 

  353. <span class="sd">		backend (Backend):  The backend to use for plotting. Defaults to</span>
    354. 

  354. <span class="sd">							:attr:`Backend.MPL` (= matplotlib).</span>
    355. 

  355. 

  356. <span class="sd">	See Also:</span>
    357. 

  357. <span class="sd">		- :class:`Backend`</span>
    358. 

  358. <span class="sd">		- :class:`PlotKind`</span>
    359. 

  359. <span class="sd">		- :class:`PlotManager`</span>
    360. 

  360. <span class="sd">	&quot;&quot;&quot;</span>
    361. 

  361. 	<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="nb">object</span><span class="p">,</span> <span class="n">figure</span><span class="p">,</span> <span class="n">kind</span><span class="p">,</span> <span class="n">interval</span><span class="o">=</span><span class="mi">100</span><span class="p">,</span> <span class="n">backend</span><span class="o">=</span><span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">):</span>
    362. 

  362. 		<span class="k">assert</span> <span class="n">Backend</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">backend</span><span class="p">),</span> <span class="s2">&quot;Invalid backend.&quot;</span>
    363. 

  363. 		<span class="bp">self</span><span class="o">.</span><span class="n">object</span> <span class="o">=</span> <span class="nb">object</span>
    364. 

  364. 		<span class="bp">self</span><span class="o">.</span><span class="n">kind</span> <span class="o">=</span> <span class="n">kind</span>
    365. 

  365. 		<span class="bp">self</span><span class="o">.</span><span class="n">figure</span> <span class="o">=</span> <span class="n">figure</span>
    366. 

  366. 

  367. 		<span class="bp">self</span><span class="o">.</span><span class="n">kind</span><span class="o">.</span><span class="n">_backend</span> <span class="o">=</span> <span class="n">backend</span>
    368. 

  368. 		<span class="bp">self</span><span class="o">.</span><span class="n">elm</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">kind</span><span class="o">.</span><span class="n">create</span><span class="p">(</span><span class="n">figure</span><span class="p">)</span>
    369. 

  369. 		<span class="bp">self</span><span class="o">.</span><span class="n">__opened</span> <span class="o">=</span> <span class="kc">True</span>
    370. 

  370. 

  371. 		<span class="c1"># obtaining information</span>
    372. 

  372. 		<span class="bp">self</span><span class="o">.</span><span class="n">__get_data</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">obj</span><span class="p">:</span> <span class="n">obj</span><span class="o">.</span><span class="n">data_xy</span>
    373. 

  373. 		<span class="bp">self</span><span class="o">.</span><span class="n">__events</span> <span class="o">=</span> <span class="p">{</span>
    374. 

  374. 			<span class="s2">&quot;update_event&quot;</span><span class="p">:</span> <span class="p">[],</span>
    375. 

  375. 			<span class="s2">&quot;close_event&quot;</span><span class="p">:</span> <span class="p">[]</span>
    376. 

  376. 		<span class="p">}</span>
    377. 

  377. 

  378. 		<span class="c1"># backend info:</span>
    379. 

  379. 		<span class="k">if</span> <span class="n">backend</span> <span class="o">==</span> <span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">:</span>
    380. 

  380. 			<span class="bp">self</span><span class="o">.</span><span class="n">__ani</span> <span class="o">=</span> <span class="n">animation</span><span class="o">.</span><span class="n">FuncAnimation</span><span class="p">(</span><span class="n">figure</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="k">lambda</span> <span class="n">_</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">(),</span> <span class="n">interval</span><span class="o">=</span><span class="n">interval</span><span class="p">)</span>
    381. 

  381. 			<span class="n">figure</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">mpl_connect</span><span class="p">(</span><span class="s1">&#39;close_event&#39;</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">evt</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">__close_event</span><span class="p">())</span>
    382. 

  382. 		<span class="k">elif</span> <span class="n">backend</span> <span class="o">==</span> <span class="n">Backend</span><span class="o">.</span><span class="n">BOKEH</span><span class="p">:</span>
    383. 

  383. 			<span class="n">curdoc</span><span class="p">()</span><span class="o">.</span><span class="n">add_periodic_callback</span><span class="p">(</span><span class="k">lambda</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">(),</span> <span class="n">interval</span><span class="p">)</span>
    384. 

  384. 			<span class="c1"># TODO (is this even possible?):</span>
    385. 

  385. 			<span class="n">curdoc</span><span class="p">()</span><span class="o">.</span><span class="n">on_session_destroyed</span><span class="p">(</span><span class="k">lambda</span> <span class="n">ctx</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">close_event</span><span class="p">())</span>
    386. 

  386. 

  387. <div class="viewcode-block" id="PlotHandler.signal"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotHandler.signal">[docs]</a>	<span class="k">def</span> <span class="nf">signal</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
    388. 

  388. 		<span class="sd">&quot;&quot;&quot;</span>
    389. 

  389. <span class="sd">		Raise a signal with a specific name and arguments.</span>
    390. 

  390. 

  391. <span class="sd">		The accepted signals are:</span>
    392. 

  392. 

  393. <span class="sd">		- :code:`update_event(data)`: Raised whenever the plot updates. It takes the</span>
    394. 

  394. <span class="sd">		  new plot data that has been polled.</span>
    395. 

  395. <span class="sd">		- :code:`close_event`: Raised whenever the plot closes. No additional arguments</span>
    396. 

  396. <span class="sd">		  are associated with this event.</span>
    397. 

  397. 

  398. <span class="sd">		Note:</span>
    399. 

  399. <span class="sd">			Normally, users do not need to call this function.</span>
    400. 

  400. 

  401. <span class="sd">		Args:</span>
    402. 

  402. <span class="sd">			name (str):     The name of the signal to raise.</span>
    403. 

  403. <span class="sd">			*args:          Additional arguments to pass to the connected events.</span>
    404. 

  404. 

  405. <span class="sd">		See Also:</span>
    406. 

  406. <span class="sd">			- :func:`PlotHandler.connect`</span>
    407. 

  407. <span class="sd">			- :func:`PlotManager.connect`</span>
    408. 

  408. <span class="sd">			- :func:`follow`</span>
    409. 

  409. <span class="sd">		&quot;&quot;&quot;</span>
    410. 

  410. 		<span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__events</span><span class="p">:</span>
    411. 

  411. 			<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">&quot;Invalid signal &#39;</span><span class="si">%s</span><span class="s2">&#39; in PlotHandler.&quot;</span> <span class="o">%</span> <span class="n">name</span><span class="p">)</span>
    412. 

  412. 		<span class="k">for</span> <span class="n">evt</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__events</span><span class="p">[</span><span class="n">name</span><span class="p">]:</span>
    413. 

  413. 			<span class="n">evt</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">)</span></div>
    414. 

  414. 

  415. <div class="viewcode-block" id="PlotHandler.connect"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotHandler.connect">[docs]</a>	<span class="k">def</span> <span class="nf">connect</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">function</span><span class="p">):</span>
    416. 

  416. 		<span class="sd">&quot;&quot;&quot;</span>
    417. 

  417. <span class="sd">		Connect an event with an additional function.</span>
    418. 

  418. <span class="sd">		Useful for e.g. updating the plot axes w.r.t. the data.</span>
    419. 

  419. 

  420. <span class="sd">		The functions will be called in the order they were connected to the</span>
    421. 

  421. <span class="sd">		events, with the associated arguments. The accepted signals are:</span>
    422. 

  422. 

  423. <span class="sd">		- :code:`update_event(data)`: Raised whenever the plot updates. It takes the</span>
    424. 

  424. <span class="sd">		  new plot data that has been polled.</span>
    425. 

  425. <span class="sd">		- :code:`close_event`: Raised whenever the plot closes. No additional arguments</span>
    426. 

  426. <span class="sd">		  are associated with this event.</span>
    427. 

  427. 

  428. <span class="sd">		Args:</span>
    429. 

  429. <span class="sd">			name (str):     The name of the signal to raise.</span>
    430. 

  430. <span class="sd">			function:       A function that will be called with the optional arguments</span>
    431. 

  431. <span class="sd">							whenever the event is raised.</span>
    432. 

  432. 

  433. <span class="sd">		See Also:</span>
    434. 

  434. <span class="sd">			- :func:`PlotHandler.signal`</span>
    435. 

  435. <span class="sd">			- :func:`PlotManager.connect`</span>
    436. 

  436. <span class="sd">			- :func:`follow`</span>
    437. 

  437. <span class="sd">		&quot;&quot;&quot;</span>
    438. 

  438. 		<span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__events</span><span class="p">:</span>
    439. 

  439. 			<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">&quot;Invalid signal &#39;</span><span class="si">%s</span><span class="s2">&#39; in PlotHandler.&quot;</span> <span class="o">%</span> <span class="n">name</span><span class="p">)</span>
    440. 

  440. 		<span class="bp">self</span><span class="o">.</span><span class="n">__events</span><span class="p">[</span><span class="n">name</span><span class="p">]</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">function</span><span class="p">)</span></div>
    441. 

  441. 

  442. <div class="viewcode-block" id="PlotHandler.set_data_getter"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotHandler.set_data_getter">[docs]</a>	<span class="k">def</span> <span class="nf">set_data_getter</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">function</span><span class="p">):</span>
    443. 

  443. 		<span class="sd">&quot;&quot;&quot;</span>
    444. 

  444. <span class="sd">		Sets the data getter function call. By default, the :code:`data_xy` attribute</span>
    445. 

  445. <span class="sd">		is polled, but this function provides the flexibility to alter this behaviour.</span>
    446. 

  446. 

  447. <span class="sd">		Args:</span>
    448. 

  448. <span class="sd">			function:   The function to obtain the data. Takes the :code:`object` as an</span>
    449. 

  449. <span class="sd">						input and should return a 2xN array in the form of</span>
    450. 

  450. <span class="sd">						:code:`([x1, x2, x3...], [y1, y2, y3...])`.</span>
    451. 

  451. <span class="sd">		&quot;&quot;&quot;</span>
    452. 

  452. 		<span class="bp">self</span><span class="o">.</span><span class="n">__get_data</span> <span class="o">=</span> <span class="n">function</span></div>
    453. 

  453. 

  454. <div class="viewcode-block" id="PlotHandler.get_data"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotHandler.get_data">[docs]</a>	<span class="k">def</span> <span class="nf">get_data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    455. 

  455. 		<span class="sd">&quot;&quot;&quot;</span>
    456. 

  456. <span class="sd">		Actually gets the data from the object.</span>
    457. 

  457. <span class="sd">		&quot;&quot;&quot;</span>
    458. 

  458. 		<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">__get_data</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">object</span><span class="p">)</span></div>
    459. 

  459. 

  460. <div class="viewcode-block" id="PlotHandler.close_plot"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotHandler.close_plot">[docs]</a>	<span class="k">def</span> <span class="nf">close_plot</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    461. 

  461. 		<span class="sd">&quot;&quot;&quot;</span>
    462. 

  462. <span class="sd">		Closes the plot/figure associated with this handler.</span>
    463. 

  463. 

  464. <span class="sd">		See Also:</span>
    465. 

  465. <span class="sd">			:func:`PlotHandler.close_event`</span>
    466. 

  466. <span class="sd">		&quot;&quot;&quot;</span>
    467. 

  467. 		<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">kind</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">):</span>
    468. 

  468. 			<span class="bp">self</span><span class="o">.</span><span class="n">figure</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
    469. 

  469. 		<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">kind</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">BOKEH</span><span class="p">):</span>
    470. 

  470. 			<span class="c1"># TODO</span>
    471. 

  471. 			<span class="k">pass</span></div>
    472. 

  472. 

  473. <div class="viewcode-block" id="PlotHandler.close_event"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotHandler.close_event">[docs]</a>	<span class="k">def</span> <span class="nf">close_event</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    474. 

  474. 		<span class="sd">&quot;&quot;&quot;</span>
    475. 

  475. <span class="sd">		Closes the plots and raises the `close_event` signal.</span>
    476. 

  476. <span class="sd">		&quot;&quot;&quot;</span>
    477. 

  477. 		<span class="bp">self</span><span class="o">.</span><span class="n">close_plot</span><span class="p">()</span>
    478. 

  478. 		<span class="bp">self</span><span class="o">.</span><span class="n">__close_event</span><span class="p">()</span></div>
    479. 

  479. 

  480. 	<span class="k">def</span> <span class="nf">__close_event</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    481. 

  481. 		<span class="sd">&quot;&quot;&quot;</span>
    482. 

  482. <span class="sd">		Raises the `close_event` signal.</span>
    483. 

  483. 

  484. <span class="sd">		Note:</span>
    485. 

  485. <span class="sd">			This function is only used in the backend to prevent double</span>
    486. 

  486. <span class="sd">			closing of the plots.</span>
    487. 

  487. <span class="sd">		&quot;&quot;&quot;</span>
    488. 

  488. 		<span class="bp">self</span><span class="o">.</span><span class="n">__opened</span> <span class="o">=</span> <span class="kc">False</span>
    489. 

  489. 		<span class="bp">self</span><span class="o">.</span><span class="n">signal</span><span class="p">(</span><span class="s1">&#39;close_event&#39;</span><span class="p">)</span>
    490. 

  490. 

  491. <div class="viewcode-block" id="PlotHandler.is_opened"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotHandler.is_opened">[docs]</a>	<span class="k">def</span> <span class="nf">is_opened</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    492. 

  492. 		<span class="sd">&quot;&quot;&quot;</span>
    493. 

  493. <span class="sd">		Checks if the plots are still open.</span>
    494. 

  494. <span class="sd">		&quot;&quot;&quot;</span>
    495. 

  495. 		<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">__opened</span></div>
    496. 

  496. 

  497. <div class="viewcode-block" id="PlotHandler.update"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotHandler.update">[docs]</a>	<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    498. 

  498. 		<span class="sd">&quot;&quot;&quot;</span>
    499. 

  499. <span class="sd">		Updates the plot information.</span>
    500. 

  500. <span class="sd">		&quot;&quot;&quot;</span>
    501. 

  501. 		<span class="n">data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_data</span><span class="p">()</span>
    502. 

  502. 		<span class="bp">self</span><span class="o">.</span><span class="n">kind</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">elm</span><span class="p">,</span> <span class="o">*</span><span class="n">data</span><span class="p">)</span>
    503. 

  503. 		<span class="bp">self</span><span class="o">.</span><span class="n">signal</span><span class="p">(</span><span class="s1">&#39;update_event&#39;</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span></div></div>
    504. 

  504. 

  505. 

  506. <div class="viewcode-block" id="follow"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.follow">[docs]</a><span class="k">def</span> <span class="nf">follow</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">size</span><span class="p">,</span> <span class="n">lower_bound</span><span class="o">=-</span><span class="nb">float</span><span class="p">(</span><span class="s1">&#39;inf&#39;</span><span class="p">),</span> <span class="n">upper_bound</span><span class="o">=</span><span class="nb">float</span><span class="p">(</span><span class="s1">&#39;inf&#39;</span><span class="p">),</span> <span class="n">perc_keep</span><span class="o">=</span><span class="mf">0.5</span><span class="p">):</span>
    507. 

  507. 	<span class="sd">&quot;&quot;&quot;</span>
    508. 

  508. <span class="sd">	Compute the new limits for the given dataset if the last data point must be followed.</span>
    509. 

  509. <span class="sd">	This is a convenience function for updating the plotting axes&#39; limits. Whenever not</span>
    510. 

  510. <span class="sd">	enough data is available, the axis won&#39;t scale down.</span>
    511. 

  511. 

  512. <span class="sd">	Args:</span>
    513. 

  513. <span class="sd">		data (list):            The data that must be plotted on the axes. Can be a</span>
    514. 

  514. <span class="sd">								shortened version of only the final n values (n &gt; 0).</span>
    515. 

  515. <span class="sd">		size (float):           The total size of the axis to show, even if the data</span>
    516. 

  516. <span class="sd">								did not get there.</span>
    517. 

  517. <span class="sd">		lower_bound (float):    The lower bound of the axis, i.e. the minimal value to</span>
    518. 

  518. <span class="sd">								show, even if the data lies outside of this interval.</span>
    519. 

  519. <span class="sd">								Defaults to :code:`-float(&#39;inf&#39;)` (-infinity = no limit).</span>
    520. 

  520. <span class="sd">		upper_bound (float):    The upper bound of the axis, i.e. the maximal value to</span>
    521. 

  521. <span class="sd">								show, even if the data lies outside of this interval.</span>
    522. 

  522. <span class="sd">								Defaults to :code:`float(&#39;inf&#39;)` (infinity = no limit).</span>
    523. 

  523. <span class="sd">		perc_keep (float):      The percentage at which the final data point must be</span>
    524. 

  524. <span class="sd">								shown. When :code:`0.0`, this point is the lowest value</span>
    525. 

  525. <span class="sd">								shown. When :code:`1.0`, this point is the highest value</span>
    526. 

  526. <span class="sd">								shown. Use this value to change how &quot;centered&quot; the last</span>
    527. 

  527. <span class="sd">								datapoint will be. When the axis grows in a positive</span>
    528. 

  528. <span class="sd">								direction, a value of :code:`0.0` will never show the</span>
    529. 

  529. <span class="sd">								data. When growing negatively, the opposite is true:</span>
    530. 

  530. <span class="sd">								the data will not be shown for a value of :code:`1.0`.</span>
    531. 

  531. <span class="sd">								Defaults to :code:`0.5` (= the middle).</span>
    532. 

  532. 

  533. <span class="sd">	Danger:</span>
    534. 

  534. <span class="sd">		* The lower bound must be strictly smaller than the upper bound.</span>
    535. 

  535. <span class="sd">		* The size cannot be larger than the distance between the bounds.</span>
    536. 

  536. 

  537. <span class="sd">	Examples:</span>
    538. 

  538. <span class="sd">		- Follow a sine wave in the positive-x direction, always keeping a width of 10, in matplotlib.</span>
    539. 

  539. 

  540. <span class="sd">		.. code-block:: python</span>
    541. 

  541. 

  542. <span class="sd">			manager = PlotManager()</span>
    543. 

  543. <span class="sd">			manager.register(&quot;sin&quot;, cbd.findBlock(&quot;plot&quot;)[0], (fig, ax), LinePlot())</span>
    544. 

  544. <span class="sd">			manager.connect(&#39;sin&#39;, &#39;update_event&#39;, lambda d, a=ax: a.set_xlim(follow(d[0], 10.0, lower_bound=0.0)))</span>
    545. 

  545. 

  546. <span class="sd">		- Follow a sine wave in the negative-x direction, always keeping a width of 10, in matplotlib.</span>
    547. 

  547. 

  548. <span class="sd">		.. code-block:: python</span>
    549. 

  549. 

  550. <span class="sd">			manager = PlotManager()</span>
    551. 

  551. <span class="sd">			manager.register(&quot;sin&quot;, cbd.findBlock(&quot;plot&quot;)[0], (fig, ax), LinePlot())</span>
    552. 

  552. <span class="sd">			manager.connect(&#39;sin&#39;, &#39;update_event&#39;, lambda d, a=ax: a.set_xlim(follow(d[0], 10.0, upper_bound=0.0)))</span>
    553. 

  553. 

  554. <span class="sd">		- Follow a positive sine-wave, but keep a 10% margin from the right edge of the plot, in matplotlib.</span>
    555. 

  555. 

  556. <span class="sd">		.. code-block:: python</span>
    557. 

  557. 

  558. <span class="sd">			manager = PlotManager()</span>
    559. 

  559. <span class="sd">			manager.register(&quot;sin&quot;, cbd.findBlock(&quot;plot&quot;)[0], (fig, ax), LinePlot())</span>
    560. 

  560. <span class="sd">			manager.connect(&#39;sin&#39;, &#39;update_event&#39;, lambda d, a=ax: a.set_xlim(follow(d[0], 10.0, 0.0, perc_keep=0.9)))</span>
    561. 

  561. <span class="sd">	&quot;&quot;&quot;</span>
    562. 

  562. 	<span class="k">assert</span> <span class="n">lower_bound</span> <span class="o">&lt;</span> <span class="n">upper_bound</span><span class="p">,</span> <span class="s2">&quot;Lower bound must be strictly smaller than the upper bound.&quot;</span>
    563. 

  563. 	<span class="k">assert</span> <span class="n">upper_bound</span> <span class="o">-</span> <span class="n">lower_bound</span> <span class="o">&gt;=</span> <span class="n">size</span><span class="p">,</span> <span class="s2">&quot;Invalid size: outside bounds.&quot;</span>
    564. 

  564. 	<span class="k">if</span> <span class="n">upper_bound</span> <span class="o">-</span> <span class="n">lower_bound</span> <span class="o">==</span> <span class="n">size</span><span class="p">:</span>
    565. 

  565. 		<span class="k">return</span> <span class="n">lower_bound</span><span class="p">,</span> <span class="n">upper_bound</span>
    566. 

  566. 	<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">data</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
    567. 

  567. 		<span class="k">return</span> <span class="o">-</span><span class="n">size</span> <span class="o">/</span> <span class="mf">2.0</span><span class="p">,</span> <span class="n">size</span> <span class="o">/</span> <span class="mf">2.0</span>
    568. 

  568. 	<span class="n">value</span> <span class="o">=</span> <span class="n">data</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>
    569. 

  569. 	<span class="n">low</span> <span class="o">=</span> <span class="nb">max</span><span class="p">(</span><span class="n">value</span> <span class="o">-</span> <span class="n">size</span> <span class="o">*</span> <span class="n">perc_keep</span><span class="p">,</span> <span class="n">lower_bound</span><span class="p">)</span>
    570. 

  570. 	<span class="n">high</span> <span class="o">=</span> <span class="nb">min</span><span class="p">(</span><span class="n">low</span> <span class="o">+</span> <span class="n">size</span><span class="p">,</span> <span class="n">upper_bound</span><span class="p">)</span>
    571. 

  571. 	<span class="k">if</span> <span class="n">high</span> <span class="o">==</span> <span class="n">upper_bound</span><span class="p">:</span>
    572. 

  572. 		<span class="n">low</span> <span class="o">=</span> <span class="n">high</span> <span class="o">-</span> <span class="n">size</span>
    573. 

  573. 	<span class="k">return</span> <span class="n">low</span><span class="p">,</span> <span class="n">high</span></div>
    574. 

  574. 

  575. 

  576. <div class="viewcode-block" id="PlotKind"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotKind">[docs]</a><span class="k">class</span> <span class="nc">PlotKind</span><span class="p">:</span>
    577. 

  577. 	<span class="sd">&quot;&quot;&quot;</span>
    578. 

  578. <span class="sd">	The kind of plot that needs to be rendered. This class is an abstract superclass.</span>
    579. 

  579. 

  580. <span class="sd">	Not all backends provide the same functionality for plotting the same shape.</span>
    581. 

  581. <span class="sd">	This class provides a wrapper around all those functionalities to allow for users</span>
    582. 

  582. <span class="sd">	that they only need to change the figure information.</span>
    583. 

  583. 

  584. <span class="sd">	Args:</span>
    585. 

  585. <span class="sd">		*args:      The arguments to add to the &#39;shape&#39;, excluding the data points.</span>
    586. 

  586. <span class="sd">		**kwargs:   The keyword arguments to add to the &#39;shape&#39;.</span>
    587. 

  587. 

  588. <span class="sd">	See Also:</span>
    589. 

  589. <span class="sd">		- :class:`LinePlot`</span>
    590. 

  590. <span class="sd">		- :class:`StepPlot`</span>
    591. 

  591. <span class="sd">		- :class:`ScatterPlot`</span>
    592. 

  592. <span class="sd">		- Information on the individual plot instances in the corresponding frameworks.</span>
    593. 

  593. <span class="sd">	&quot;&quot;&quot;</span>
    594. 

  594. 	<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
    595. 

  595. 		<span class="bp">self</span><span class="o">.</span><span class="n">_backend</span> <span class="o">=</span> <span class="kc">None</span>
    596. 

  596. 		<span class="bp">self</span><span class="o">.</span><span class="n">args</span> <span class="o">=</span> <span class="n">args</span>
    597. 

  597. 		<span class="bp">self</span><span class="o">.</span><span class="n">kwargs</span> <span class="o">=</span> <span class="n">kwargs</span>
    598. 

  598. 

  599. <div class="viewcode-block" id="PlotKind.is_backend"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotKind.is_backend">[docs]</a>	<span class="k">def</span> <span class="nf">is_backend</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">backend</span><span class="p">):</span>
    600. 

  600. 		<span class="sd">&quot;&quot;&quot;</span>
    601. 

  601. <span class="sd">		Checks the backend for the plot.</span>
    602. 

  602. <span class="sd">		&quot;&quot;&quot;</span>
    603. 

  603. 		<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_backend</span> <span class="o">==</span> <span class="n">backend</span></div>
    604. 

  604. 

  605. <div class="viewcode-block" id="PlotKind.create"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotKind.create">[docs]</a>	<span class="k">def</span> <span class="nf">create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">figure</span><span class="p">):</span>
    606. 

  606. 		<span class="sd">&quot;&quot;&quot;</span>
    607. 

  607. <span class="sd">		Called when the figure is first created in the manager.</span>
    608. 

  608. 

  609. <span class="sd">		Returns:</span>
    610. 

  610. <span class="sd">			The &#39;shape&#39; information that is created on the plot.</span>
    611. 

  611. <span class="sd">		&quot;&quot;&quot;</span>
    612. 

  612. 		<span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span></div>
    613. 

  613. 

  614. <div class="viewcode-block" id="PlotKind.update"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotKind.update">[docs]</a>	<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">element</span><span class="p">,</span> <span class="o">*</span><span class="n">data</span><span class="p">):</span>
    615. 

  615. 		<span class="sd">&quot;&quot;&quot;</span>
    616. 

  616. <span class="sd">		Called when the figure is updated in the manager.</span>
    617. 

  617. 

  618. <span class="sd">		Args:</span>
    619. 

  619. <span class="sd">			element:    The shape that was returned from the :func:`PlotKind.create`</span>
    620. 

  620. <span class="sd">						method.</span>
    621. 

  621. <span class="sd">			*data:      The data with which to update the plot.</span>
    622. 

  622. <span class="sd">		&quot;&quot;&quot;</span>
    623. 

  623. 		<span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">()</span></div></div>
    624. 

  624. 

  625. 

  626. <div class="viewcode-block" id="LinePlot"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.LinePlot">[docs]</a><span class="k">class</span> <span class="nc">LinePlot</span><span class="p">(</span><span class="n">PlotKind</span><span class="p">):</span>
    627. 

  627. 	<span class="sd">&quot;&quot;&quot;</span>
    628. 

  628. <span class="sd">	Draws a line between all given coordinates.</span>
    629. 

  629. 

  630. <span class="sd">	Backend Information:</span>
    631. 

  631. <span class="sd">		- **matplotlib:** :func:`matplotlib.axes.Axes.plot`</span>
    632. 

  632. <span class="sd">		- **bokeh:** :func:`bokeh.plotting.Figure.line`</span>
    633. 

  633. 

  634. <span class="sd">	See Also:</span>
    635. 

  635. <span class="sd">		- :class:`PlotKind`</span>
    636. 

  636. <span class="sd">		- :class:`StepPlot`</span>
    637. 

  637. <span class="sd">		- :class:`ScatterPlot`</span>
    638. 

  638. <span class="sd">	&quot;&quot;&quot;</span>
    639. 

  639. <div class="viewcode-block" id="LinePlot.create"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.LinePlot.create">[docs]</a>	<span class="k">def</span> <span class="nf">create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">figure</span><span class="p">):</span>
    640. 

  640. 		<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">):</span>
    641. 

  641. 			<span class="c1"># matplotlib: figure[1] is the axis</span>
    642. 

  642. 			<span class="n">line</span><span class="p">,</span> <span class="o">=</span> <span class="n">figure</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">plot</span><span class="p">([],</span> <span class="p">[],</span> <span class="o">*</span><span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)</span>
    643. 

  643. 			<span class="k">return</span> <span class="n">line</span>
    644. 

  644. 		<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">BOKEH</span><span class="p">):</span>
    645. 

  645. 			<span class="k">return</span> <span class="n">figure</span><span class="o">.</span><span class="n">line</span><span class="p">([],</span> <span class="p">[],</span> <span class="o">*</span><span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)</span></div>
    646. 

  646. 

  647. <div class="viewcode-block" id="LinePlot.update"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.LinePlot.update">[docs]</a>	<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">element</span><span class="p">,</span> <span class="o">*</span><span class="n">data</span><span class="p">):</span>
    648. 

  648. 		<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">):</span>
    649. 

  649. 			<span class="n">element</span><span class="o">.</span><span class="n">set_data</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
    650. 

  650. 		<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">BOKEH</span><span class="p">):</span>
    651. 

  651. 			<span class="n">element</span><span class="o">.</span><span class="n">data_source</span><span class="o">.</span><span class="n">data</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">x</span><span class="o">=</span><span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">y</span><span class="o">=</span><span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span></div></div>
    652. 

  652. 

  653. 

  654. <div class="viewcode-block" id="StepPlot"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.StepPlot">[docs]</a><span class="k">class</span> <span class="nc">StepPlot</span><span class="p">(</span><span class="n">PlotKind</span><span class="p">):</span>
    655. 

  655. 	<span class="sd">&quot;&quot;&quot;</span>
    656. 

  656. <span class="sd">	Draws a stepped line between all given coordinates.</span>
    657. 

  657. <span class="sd">	See the corresponding backend information to change the step &quot;levels&quot;.</span>
    658. 

  658. 

  659. <span class="sd">	Backend Information:</span>
    660. 

  660. <span class="sd">		- **matplotlib:** :func:`matplotlib.axes.Axes.step`</span>
    661. 

  661. <span class="sd">		- **bokeh:** :func:`bokeh.plotting.Figure.step`</span>
    662. 

  662. 

  663. <span class="sd">	See Also:</span>
    664. 

  664. <span class="sd">		- :class:`PlotKind`</span>
    665. 

  665. <span class="sd">		- :class:`LinePlot`</span>
    666. 

  666. <span class="sd">		- :class:`StepPlot`</span>
    667. 

  667. <span class="sd">	&quot;&quot;&quot;</span>
    668. 

  668. <div class="viewcode-block" id="StepPlot.create"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.StepPlot.create">[docs]</a>	<span class="k">def</span> <span class="nf">create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">figure</span><span class="p">):</span>
    669. 

  669. 		<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">):</span>
    670. 

  670. 			<span class="c1"># matplotlib: figure[1] is the axis</span>
    671. 

  671. 			<span class="n">line</span><span class="p">,</span> <span class="o">=</span> <span class="n">figure</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">step</span><span class="p">([],</span> <span class="p">[],</span> <span class="o">*</span><span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)</span>
    672. 

  672. 			<span class="k">return</span> <span class="n">line</span>
    673. 

  673. 		<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">BOKEH</span><span class="p">):</span>
    674. 

  674. 			<span class="k">return</span> <span class="n">figure</span><span class="o">.</span><span class="n">step</span><span class="p">([],</span> <span class="p">[],</span> <span class="o">*</span><span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)</span></div>
    675. 

  675. 

  676. <div class="viewcode-block" id="StepPlot.update"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.StepPlot.update">[docs]</a>	<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">element</span><span class="p">,</span> <span class="o">*</span><span class="n">data</span><span class="p">):</span>
    677. 

  677. 		<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">):</span>
    678. 

  678. 			<span class="n">element</span><span class="o">.</span><span class="n">set_data</span><span class="p">(</span><span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
    679. 

  679. 		<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">BOKEH</span><span class="p">):</span>
    680. 

  680. 			<span class="n">element</span><span class="o">.</span><span class="n">data_source</span><span class="o">.</span><span class="n">data</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">x</span><span class="o">=</span><span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">y</span><span class="o">=</span><span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span></div></div>
    681. 

  681. 

  682. 

  683. <div class="viewcode-block" id="ScatterPlot"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.ScatterPlot">[docs]</a><span class="k">class</span> <span class="nc">ScatterPlot</span><span class="p">(</span><span class="n">PlotKind</span><span class="p">):</span>
    684. 

  684. 	<span class="sd">&quot;&quot;&quot;</span>
    685. 

  685. <span class="sd">	Draws all given coordinates as points in a 2D space.</span>
    686. 

  686. <span class="sd">	See the corresponding backend information to change the shape of the indicators.</span>
    687. 

  687. 

  688. <span class="sd">	Backend Information:</span>
    689. 

  689. <span class="sd">		- **matplotlib:** :func:`matplotlib.axes.Axes.scatter`</span>
    690. 

  690. <span class="sd">		- **bokeh:** :func:`bokeh.plotting.Figure.scatter`</span>
    691. 

  691. 

  692. <span class="sd">	See Also:</span>
    693. 

  693. <span class="sd">		- :class:`PlotKind`</span>
    694. 

  694. <span class="sd">		- :class:`LinePlot`</span>
    695. 

  695. <span class="sd">		- :class:`StepPlot`</span>
    696. 

  696. <span class="sd">	&quot;&quot;&quot;</span>
    697. 

  697. <div class="viewcode-block" id="ScatterPlot.create"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.ScatterPlot.create">[docs]</a>	<span class="k">def</span> <span class="nf">create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">figure</span><span class="p">):</span>
    698. 

  698. 		<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">):</span>
    699. 

  699. 			<span class="c1"># matplotlib: figure[1] is the axis</span>
    700. 

  700. 			<span class="n">pathc</span> <span class="o">=</span> <span class="n">figure</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">scatter</span><span class="p">([],</span> <span class="p">[],</span> <span class="o">*</span><span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)</span>
    701. 

  701. 			<span class="k">return</span> <span class="n">pathc</span>
    702. 

  702. 		<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">BOKEH</span><span class="p">):</span>
    703. 

  703. 			<span class="k">return</span> <span class="n">figure</span><span class="o">.</span><span class="n">scatter</span><span class="p">([],</span> <span class="p">[],</span> <span class="o">*</span><span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)</span></div>
    704. 

  704. 

  705. <div class="viewcode-block" id="ScatterPlot.update"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.ScatterPlot.update">[docs]</a>	<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">element</span><span class="p">,</span> <span class="o">*</span><span class="n">data</span><span class="p">):</span>
    706. 

  706. 		<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">):</span>
    707. 

  707. 			<span class="n">element</span><span class="o">.</span><span class="n">set_offsets</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="nb">zip</span><span class="p">(</span><span class="o">*</span><span class="n">data</span><span class="p">)))</span>
    708. 

  708. 		<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_backend</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">BOKEH</span><span class="p">):</span>
    709. 

  709. 			<span class="n">element</span><span class="o">.</span><span class="n">data_source</span><span class="o">.</span><span class="n">data</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">x</span><span class="o">=</span><span class="n">data</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">y</span><span class="o">=</span><span class="n">data</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span></div></div>
    710. 

  710. 

  711. 

  712. <div class="viewcode-block" id="PlotManager"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotManager">[docs]</a><span class="k">class</span> <span class="nc">PlotManager</span><span class="p">:</span>
    713. 

  713. 	<span class="sd">&quot;&quot;&quot;</span>
    714. 

  714. <span class="sd">	Manages multiple :class:`PlotHandler` instances.</span>
    715. 

  715. <span class="sd">	Use this class as a centralized unit to manage one or more plots in the system.</span>
    716. 

  716. 

  717. <span class="sd">	Args:</span>
    718. 

  718. <span class="sd">		backend (Backend):  The backend to use.</span>
    719. 

  719. 

  720. <span class="sd">	Raises:</span>
    721. 

  721. <span class="sd">		AssertionError: if the backend cannot be located.</span>
    722. 

  722. 

  723. <span class="sd">	See Also:</span>
    724. 

  724. <span class="sd">		- :class:`Backend`</span>
    725. 

  725. <span class="sd">		- :class:`PlotHandler`</span>
    726. 

  726. <span class="sd">	&quot;&quot;&quot;</span>
    727. 

  727. 	<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">backend</span><span class="o">=</span><span class="n">Backend</span><span class="o">.</span><span class="n">MPL</span><span class="p">):</span>
    728. 

  728. 		<span class="k">assert</span> <span class="n">Backend</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">backend</span><span class="p">),</span> <span class="s2">&quot;Invalid backend.&quot;</span>
    729. 

  729. 		<span class="bp">self</span><span class="o">.</span><span class="n">__handlers</span> <span class="o">=</span> <span class="p">{}</span>
    730. 

  730. 		<span class="bp">self</span><span class="o">.</span><span class="n">backend</span> <span class="o">=</span> <span class="n">backend</span>
    731. 

  731. 

  732. <div class="viewcode-block" id="PlotManager.is_opened"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotManager.is_opened">[docs]</a>	<span class="k">def</span> <span class="nf">is_opened</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    733. 

  733. 		<span class="sd">&quot;&quot;&quot;</span>
    734. 

  734. <span class="sd">		Checks if there is at least a single plot left open.</span>
    735. 

  735. <span class="sd">		&quot;&quot;&quot;</span>
    736. 

  736. 		<span class="k">return</span> <span class="nb">any</span><span class="p">([</span><span class="n">h</span><span class="o">.</span><span class="n">is_opened</span><span class="p">()</span> <span class="k">for</span> <span class="n">h</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__handlers</span><span class="o">.</span><span class="n">values</span><span class="p">()])</span></div>
    737. 

  737. 

  738. <div class="viewcode-block" id="PlotManager.all_opened"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotManager.all_opened">[docs]</a>	<span class="k">def</span> <span class="nf">all_opened</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    739. 

  739. 		<span class="sd">&quot;&quot;&quot;</span>
    740. 

  740. <span class="sd">		Checks if all plots are still open.</span>
    741. 

  741. <span class="sd">		&quot;&quot;&quot;</span>
    742. 

  742. 		<span class="k">return</span> <span class="nb">all</span><span class="p">([</span><span class="n">h</span><span class="o">.</span><span class="n">is_opened</span><span class="p">()</span> <span class="k">for</span> <span class="n">h</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__handlers</span><span class="o">.</span><span class="n">values</span><span class="p">()])</span></div>
    743. 

  743. 

  744. <div class="viewcode-block" id="PlotManager.register"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotManager.register">[docs]</a>	<span class="k">def</span> <span class="nf">register</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="nb">object</span><span class="p">,</span> <span class="n">figure</span><span class="p">,</span> <span class="n">kind</span><span class="p">,</span> <span class="n">interval</span><span class="o">=</span><span class="mi">100</span><span class="p">):</span>
    745. 

  745. 		<span class="sd">&quot;&quot;&quot;</span>
    746. 

  746. <span class="sd">		Register a single :class:`PlotHandler` to plot information.</span>
    747. 

  747. 

  748. <span class="sd">		Args:</span>
    749. 

  749. <span class="sd">			name (str):         The name for this handler. Will be used to optionally</span>
    750. 

  750. <span class="sd">								access it afterwards.</span>
    751. 

  751. <span class="sd">			object (Any):       The object from which data needs to be polled. By default,</span>
    752. 

  752. <span class="sd">								the :code:`data_xy` attribute will be used on the object,</span>
    753. 

  753. <span class="sd">								which should result in a 2xN array in the form of</span>
    754. 

  754. <span class="sd">								:code:`([x1, x2, x3...], [y1, y2, y3...])`.</span>
    755. 

  755. <span class="sd">			figure:             The figure object required for plotting. This has been made</span>
    756. 

  756. <span class="sd">								externally to allow for full manipulation of the plotting</span>
    757. 

  757. <span class="sd">								framework itself.</span>
    758. 

  758. <span class="sd">			kind (PlotKind):    What needs to be plotted. See :class:`PlotKind` for more</span>
    759. 

  759. <span class="sd">								info.</span>
    760. 

  760. <span class="sd">			interval (int):     Amount of milliseconds between plot refreshes.</span>
    761. 

  761. 

  762. <span class="sd">		See Also:</span>
    763. 

  763. <span class="sd">			:class:`PlotHandler`</span>
    764. 

  764. <span class="sd">		&quot;&quot;&quot;</span>
    765. 

  765. 		<span class="k">if</span> <span class="n">name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__handlers</span><span class="p">:</span>
    766. 

  766. 			<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">&quot;PlotManager: PlotHandler &#39;</span><span class="si">%s</span><span class="s2">&#39; already registered.&quot;</span> <span class="o">%</span> <span class="n">name</span><span class="p">)</span>
    767. 

  767. 		<span class="bp">self</span><span class="o">.</span><span class="n">__handlers</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">PlotHandler</span><span class="p">(</span><span class="nb">object</span><span class="p">,</span> <span class="n">figure</span><span class="p">,</span> <span class="n">kind</span><span class="p">,</span> <span class="n">interval</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">backend</span><span class="p">)</span></div>
    768. 

  768. 

  769. <div class="viewcode-block" id="PlotManager.unregister"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotManager.unregister">[docs]</a>	<span class="k">def</span> <span class="nf">unregister</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
    770. 

  770. 		<span class="sd">&quot;&quot;&quot;</span>
    771. 

  771. <span class="sd">		Removes a single :class:`PlotHandler` from the manager.</span>
    772. 

  772. 

  773. <span class="sd">		Args:</span>
    774. 

  774. <span class="sd">			name (str): The identifying name for the handler.</span>
    775. 

  775. <span class="sd">		&quot;&quot;&quot;</span>
    776. 

  776. 		<span class="n">h</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
    777. 

  777. 		<span class="n">h</span><span class="o">.</span><span class="n">close_event</span><span class="p">()</span>
    778. 

  778. 		<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">__handlers</span><span class="p">[</span><span class="n">name</span><span class="p">]</span></div>
    779. 

  779. 

  780. <div class="viewcode-block" id="PlotManager.get"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotManager.get">[docs]</a>	<span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
    781. 

  781. 		<span class="sd">&quot;&quot;&quot;</span>
    782. 

  782. <span class="sd">		Obtains a single :class:`PlotHandler`, given its name.</span>
    783. 

  783. 

  784. <span class="sd">		Args:</span>
    785. 

  785. <span class="sd">			name (str): The identifying name for the handler to obtain.</span>
    786. 

  786. <span class="sd">		&quot;&quot;&quot;</span>
    787. 

  787. 		<span class="k">if</span> <span class="n">name</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__handlers</span><span class="p">:</span>
    788. 

  788. 			<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">&quot;PlotManager: No PlotHandler exists with name &#39;</span><span class="si">%s</span><span class="s2">&#39;.&quot;</span> <span class="o">%</span> <span class="n">name</span><span class="p">)</span>
    789. 

  789. 		<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">__handlers</span><span class="p">[</span><span class="n">name</span><span class="p">]</span></div>
    790. 

  790. 

  791. <div class="viewcode-block" id="PlotManager.connect"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.PlotManager.connect">[docs]</a>	<span class="k">def</span> <span class="nf">connect</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">handler_name</span><span class="p">,</span> <span class="n">event_name</span><span class="p">,</span> <span class="n">function</span><span class="p">):</span>
    792. 

  792. 		<span class="sd">&quot;&quot;&quot;</span>
    793. 

  793. <span class="sd">		Connect an event to a specific handler.</span>
    794. 

  794. 

  795. <span class="sd">		Args:</span>
    796. 

  796. <span class="sd">			handler_name (str): The identifying name for the handler.</span>
    797. 

  797. <span class="sd">			event_name (str):   The name for the event.</span>
    798. 

  798. <span class="sd">			function:           A function to execute whenever the event is raised.</span>
    799. 

  799. 

  800. <span class="sd">		See Also:</span>
    801. 

  801. <span class="sd">			- :func:`PlotHandler.connect`</span>
    802. 

  802. <span class="sd">			- :func:`PlotHandler.signal`</span>
    803. 

  803. <span class="sd">		&quot;&quot;&quot;</span>
    804. 

  804. 		<span class="bp">self</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">handler_name</span><span class="p">)</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="n">event_name</span><span class="p">,</span> <span class="n">function</span><span class="p">)</span></div></div>
    805. 

  805. 

  806. 

  807. <span class="c1"># TEMPORARY TEST OBJECT:</span>
    808. 

  808. <span class="kn">import</span> <span class="nn">math</span>
    809. 

  809. <span class="k">class</span> <span class="nc">__Block</span><span class="p">:</span>
    810. 

  810. 	<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">method</span><span class="p">):</span>
    811. 

  811. 		<span class="bp">self</span><span class="o">.</span><span class="n">x</span> <span class="o">=</span> <span class="p">[]</span>
    812. 

  812. 		<span class="bp">self</span><span class="o">.</span><span class="n">y</span> <span class="o">=</span> <span class="p">[]</span>
    813. 

  813. 		<span class="bp">self</span><span class="o">.</span><span class="n">int</span> <span class="o">=</span> <span class="mf">0.0</span>
    814. 

  814. 		<span class="bp">self</span><span class="o">.</span><span class="n">method</span> <span class="o">=</span> <span class="n">method</span>
    815. 

  815. 

  816. 	<span class="nd">@property</span>
    817. 

  817. 	<span class="k">def</span> <span class="nf">data_xy</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
    818. 

  818. 		<span class="bp">self</span><span class="o">.</span><span class="n">x</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">int</span><span class="p">)</span>
    819. 

  819. 		<span class="bp">self</span><span class="o">.</span><span class="n">y</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="nb">getattr</span><span class="p">(</span><span class="n">math</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">method</span><span class="p">)(</span><span class="bp">self</span><span class="o">.</span><span class="n">int</span><span class="p">))</span>
    820. 

  820. 		<span class="bp">self</span><span class="o">.</span><span class="n">int</span> <span class="o">+=</span> <span class="mf">0.1</span>
    821. 

  821. 		<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">x</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">y</span>
    822. 

  822. 

  823. 

  824. 

  825. <div class="viewcode-block" id="mpl"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.mpl">[docs]</a><span class="k">def</span> <span class="nf">mpl</span><span class="p">():</span>
    826. 

  826. 	<span class="sd">&quot;&quot;&quot;</span>
    827. 

  827. <span class="sd">	Example usage for a matplotlib backend.</span>
    828. 

  828. <span class="sd">	&quot;&quot;&quot;</span>
    829. 

  829. 	<span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>
    830. 

  830. 	<span class="n">fig</span> <span class="o">=</span> <span class="n">plt</span><span class="o">.</span><span class="n">figure</span><span class="p">(</span><span class="n">figsize</span><span class="o">=</span><span class="p">(</span><span class="mi">5</span><span class="p">,</span> <span class="mi">5</span><span class="p">),</span> <span class="n">dpi</span><span class="o">=</span><span class="mi">100</span><span class="p">)</span>
    831. 

  831. 	<span class="n">ax</span> <span class="o">=</span> <span class="n">fig</span><span class="o">.</span><span class="n">add_subplot</span><span class="p">(</span><span class="mi">111</span><span class="p">)</span>
    832. 

  832. 	<span class="n">ax</span><span class="o">.</span><span class="n">set_ylim</span><span class="p">((</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">))</span>
    833. 

  833. 

  834. 	<span class="n">manager</span> <span class="o">=</span> <span class="n">PlotManager</span><span class="p">()</span>
    835. 

  835. 	<span class="n">manager</span><span class="o">.</span><span class="n">register</span><span class="p">(</span><span class="s2">&quot;sin&quot;</span><span class="p">,</span> <span class="n">__Block</span><span class="p">(</span><span class="s1">&#39;sin&#39;</span><span class="p">),</span> <span class="p">(</span><span class="n">fig</span><span class="p">,</span> <span class="n">ax</span><span class="p">),</span> <span class="n">ScatterPlot</span><span class="p">())</span>
    836. 

  836. 	<span class="n">manager</span><span class="o">.</span><span class="n">register</span><span class="p">(</span><span class="s2">&quot;cos&quot;</span><span class="p">,</span> <span class="n">__Block</span><span class="p">(</span><span class="s1">&#39;cos&#39;</span><span class="p">),</span> <span class="p">(</span><span class="n">fig</span><span class="p">,</span> <span class="n">ax</span><span class="p">),</span> <span class="n">LinePlot</span><span class="p">(</span><span class="n">c</span><span class="o">=</span><span class="s1">&#39;red&#39;</span><span class="p">))</span>
    837. 

  837. 	<span class="n">manager</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="s1">&#39;sin&#39;</span><span class="p">,</span> <span class="s1">&#39;update_event&#39;</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">d</span><span class="p">,</span> <span class="n">axis</span><span class="o">=</span><span class="n">ax</span><span class="p">:</span> <span class="n">axis</span><span class="o">.</span><span class="n">set_xlim</span><span class="p">(</span><span class="n">PlotHandler</span><span class="o">.</span><span class="n">follow</span><span class="p">(</span><span class="n">d</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="mf">10.0</span><span class="p">,</span> <span class="mf">0.0</span><span class="p">)))</span>
    838. 

  838. 

  839. 	<span class="n">plt</span><span class="o">.</span><span class="n">show</span><span class="p">()</span></div>
    840. 

  840. 

  841. 

  842. <div class="viewcode-block" id="bkh"><a class="viewcode-back" href="../../../CBD.realtime.plotting.html#CBD.realtime.plotting.bkh">[docs]</a><span class="k">def</span> <span class="nf">bkh</span><span class="p">():</span>
    843. 

  843. 	<span class="sd">&quot;&quot;&quot;</span>
    844. 

  844. <span class="sd">	Example usage for a bokeh backend.</span>
    845. 

  845. <span class="sd">	&quot;&quot;&quot;</span>
    846. 

  846. 	<span class="kn">from</span> <span class="nn">bokeh.plotting</span> <span class="kn">import</span> <span class="n">figure</span>
    847. 

  847. 	<span class="kn">from</span> <span class="nn">bokeh.client</span> <span class="kn">import</span> <span class="n">push_session</span>
    848. 

  848. 

  849. 	<span class="n">fig</span> <span class="o">=</span> <span class="n">figure</span><span class="p">(</span><span class="n">plot_width</span><span class="o">=</span><span class="mi">400</span><span class="p">,</span> <span class="n">plot_height</span><span class="o">=</span><span class="mi">400</span><span class="p">,</span> <span class="n">y_range</span><span class="o">=</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">))</span>
    850. 

  850. 	<span class="n">curdoc</span><span class="p">()</span><span class="o">.</span><span class="n">add_root</span><span class="p">(</span><span class="n">fig</span><span class="p">)</span>
    851. 

  851. 

  852. 	<span class="n">manager</span> <span class="o">=</span> <span class="n">PlotManager</span><span class="p">(</span><span class="n">Backend</span><span class="o">.</span><span class="n">BOKEH</span><span class="p">)</span>
    853. 

  853. 	<span class="n">manager</span><span class="o">.</span><span class="n">register</span><span class="p">(</span><span class="s2">&quot;sin&quot;</span><span class="p">,</span> <span class="n">__Block</span><span class="p">(</span><span class="s1">&#39;sin&#39;</span><span class="p">),</span> <span class="n">fig</span><span class="p">,</span> <span class="n">ScatterPlot</span><span class="p">())</span>
    854. 

  854. 	<span class="n">manager</span><span class="o">.</span><span class="n">register</span><span class="p">(</span><span class="s2">&quot;cos&quot;</span><span class="p">,</span> <span class="n">__Block</span><span class="p">(</span><span class="s1">&#39;cos&#39;</span><span class="p">),</span> <span class="n">fig</span><span class="p">,</span> <span class="n">LinePlot</span><span class="p">(</span><span class="n">color</span><span class="o">=</span><span class="s1">&#39;red&#39;</span><span class="p">))</span>
    855. 

  855. 

  856. 	<span class="k">def</span> <span class="nf">set_xlim</span><span class="p">(</span><span class="n">limits</span><span class="p">):</span>
    857. 

  857. 		<span class="n">lower</span><span class="p">,</span> <span class="n">upper</span> <span class="o">=</span> <span class="n">limits</span>
    858. 

  858. 		<span class="n">fig</span><span class="o">.</span><span class="n">x_range</span><span class="o">.</span><span class="n">start</span> <span class="o">=</span> <span class="n">lower</span>
    859. 

  859. 		<span class="n">fig</span><span class="o">.</span><span class="n">x_range</span><span class="o">.</span><span class="n">end</span> <span class="o">=</span> <span class="n">upper</span>
    860. 

  860. 	<span class="n">manager</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="s1">&#39;sin&#39;</span><span class="p">,</span> <span class="s1">&#39;update_event&#39;</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">d</span><span class="p">:</span> <span class="n">set_xlim</span><span class="p">(</span><span class="n">PlotHandler</span><span class="o">.</span><span class="n">follow</span><span class="p">(</span><span class="n">d</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="mf">10.0</span><span class="p">,</span> <span class="mf">0.0</span><span class="p">)))</span>
    861. 

  861. 

  862. 	<span class="n">session</span> <span class="o">=</span> <span class="n">push_session</span><span class="p">(</span><span class="n">curdoc</span><span class="p">())</span>
    863. 

  863. 	<span class="n">session</span><span class="o">.</span><span class="n">show</span><span class="p">()</span>
    864. 

  864. 

  865. 	<span class="c1"># TODO: disable flickering? (is this possible?)</span>
    866. 

  866. 	<span class="kn">import</span> <span class="nn">time</span>
    867. 

  867. 	<span class="k">while</span> <span class="n">manager</span><span class="o">.</span><span class="n">is_opened</span><span class="p">():</span>
    868. 

  868. 		<span class="n">session</span><span class="o">.</span><span class="n">push</span><span class="p">()</span>
    869. 

  869. 		<span class="n">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span><span class="mf">0.1</span><span class="p">)</span></div>
    870. 

  870. 

  871. 

  872. <span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">&#39;__main__&#39;</span><span class="p">:</span>
    873. 

  873. 	<span class="n">bkh</span><span class="p">()</span>
    874. 

  874. </pre></div>
    875. 

  875. 

  876.              </article>
    877. 

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    880. 

  880.   
    881. 

  881. 

  882.   <hr>
    883. 

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  884.   <div role="contentinfo">
    885. 

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    886. 

  886.         &copy; Copyright 2020, Randy Paredis.
    887. 

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  888.     </p>
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  938.   <footer class="site-footer" id="site-footer">
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  948.             <li><a class="nav-dropdown-item" href="https://alchemy.host">Alchemy</a></li>
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  949.             <li><a class="nav-dropdown-item" href="https://github.com/catalyst-team/catalyst">Catalyst</a></li>
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  950.             <li><a class="nav-dropdown-item" href="https://github.com/catalyst-team/reaction">Reaction</a></li>
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    980. 

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