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"""Create a simple Play/Pause app with a timer event
You can interact with the scene during the loop!
..press q to quit"""
import time
import numpy as np
from vedo import Plotter
from vedo.pyplot import plot
def bfunc(obj, ename):
global timer_id
plotter.timer_callback("destroy", timer_id)
if "Play" in button.status():
# instruct to call handle_timer() every 10 msec:
timer_id = plotter.timer_callback("create", dt=10)
button.switch()
def handle_timer(event):
t = time.time() - t0
x = np.linspace(t, t + 4*np.pi, 50)
y = np.sin(x) * np.sin(x/12)
fig = plot(
x, y, '-o', ylim=(-1.2, 1.2), aspect=3/1,
xtitle="time window [s]", ytitle="intensity [a.u.]",
)
fig.shift(-x[0]) # put the whole plot object back at (0,0)
# Pop (remove) the old plot and add the new one
plotter.pop().add(fig).render()
timer_id = -1
t0 = time.time()
plotter= Plotter(size=(1200,600))
# plt.initialize_interactor() # on windows this is needed
button = plotter.add_button(bfunc, states=[" Play ","Pause"], size=40)
evntid = plotter.add_callback("timer", handle_timer, enable_picking=False)
x = np.linspace(0, 4*np.pi, 50)
y = np.sin(x) * np.sin(x/12)
fig = plot(x, y, ylim=(-1.2, 1.2), xtitle="time", aspect=3/1, lc='grey5')
plotter.show(__doc__, fig, zoom=2)
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