Initial work on WebAgg backend

Author: mdboom

examples/widgets/slider_demo.py

@@ -2,7 +2,8 @@
 import matplotlib.pyplot as plt
 from matplotlib.widgets import Slider, Button, RadioButtons
 
-ax = plt.subplot(111)
+fig = plt.figure()
+ax = fig.add_subplot(111)
 plt.subplots_adjust(left=0.25, bottom=0.25)
 t = np.arange(0.0, 1.0, 0.001)
 a0 = 5
@@ -22,7 +23,7 @@ def update(val):
     amp = samp.val
     freq = sfreq.val
     l.set_ydata(amp*np.sin(2*np.pi*freq*t))
-    plt.draw()
+    fig.canvas.draw_idle()
 sfreq.on_changed(update)
 samp.on_changed(update)
 
@@ -37,8 +38,7 @@ def reset(event):
 radio = RadioButtons(rax, ('red', 'blue', 'green'), active=0)
 def colorfunc(label):
     l.set_color(label)
-    plt.draw()
+    fig.canvas.draw_idle()
 radio.on_clicked(colorfunc)
 
 plt.show()
-

lib/matplotlib/animation.py

@@ -523,7 +523,7 @@ class Animation(object):
     '''
     def __init__(self, fig, event_source=None, blit=False):
         self._fig = fig
-        self._blit = blit
+        self._blit = blit and fig.canvas.supports_blit
 
         # These are the basics of the animation.  The frame sequence represents
         # information for each frame of the animation and depends on how the
@@ -543,7 +543,7 @@ def __init__(self, fig, event_source=None, blit=False):
         # fire events and try to draw to a deleted figure.
         self._close_id = self._fig.canvas.mpl_connect('close_event',
                                                       self._stop)
-        if blit:
+        if self._blit:
             self._setup_blit()
 
     def _start(self, *args):

lib/matplotlib/axes.py

@@ -2116,17 +2116,6 @@ def redraw_in_frame(self):
     def get_renderer_cache(self):
         return self._cachedRenderer
 
-    def __draw_animate(self):
-        # ignore for now; broken
-        if self._lastRenderer is None:
-            raise RuntimeError('You must first call ax.draw()')
-        dsu = [(a.zorder, a) for a in self.animated.keys()]
-        dsu.sort(key=lambda x: x[0])
-        renderer = self._lastRenderer
-        renderer.blit()
-        for tmp, a in dsu:
-            a.draw(renderer)
-
     #### Axes rectangle characteristics
 
     def get_frame_on(self):

lib/matplotlib/backend_bases.py

@@ -1482,6 +1482,8 @@ class FigureCanvasBase(object):
         'close_event'
     ]
 
+    supports_blit = True
+
     def __init__(self, figure):
         figure.set_canvas(self)
         self.figure = figure