Closed
Description
As pointed out in #17685 while you can pause an animation by reaching in and calling methods on the event source, when using Animation with blitting that is not enough, you also have to flip the animated artists back to non-animated. This code (lightly modified from @Luluser question) is a proof-of-concept.
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
from matplotlib.widgets import Button
class PlotAnimation:
def __init__(self):
self.fig, self.ax = plt.subplots()
self.x = np.linspace(-10, 10, 1000)
self.N = 200
self.interv = 50
self.n0 = (
1.0
/ (4 * np.pi * 2e-4 * 0.1) ** 0.5
* np.exp(-self.x ** 2 / (4 * 2e-4 * 0.1))
)
(self.p,) = self.ax.plot(self.x, self.n0)
self.anim_running = True
self.Myanimation = animation.FuncAnimation(
self.fig, self.update, frames=self.N, interval=self.interv, blit=True
)
def update(self, i):
self.n0 += i / 100 % 5
self.p.set_ydata(self.n0 % 20)
return (self.p,)
def animate(self):
pause_ax = self.fig.add_axes((0.7, 0.025, 0.1, 0.04))
pause_button = Button(pause_ax, "pause", hovercolor="0.975")
pause_button.on_clicked(self._pause)
plt.show()
def _pause(self, event):
if self.anim_running:
self.Myanimation.event_source.stop()
self.p.set_animated(False)
self.anim_running = False
self.fig.canvas.draw_idle()
else:
self.p.set_animated(True)
self.Myanimation.event_source.start()
self.anim_running = True
animated_plot = PlotAnimation()
animated_plot.animate()This code should be generalized and used to put a pause and resume methods on Animation.