| """ | |
| ====== | |
| Timers | |
| ====== | |
| Simple example of using general timer objects. This is used to update | |
| the time placed in the title of the figure. | |
| .. note:: | |
| This example exercises the interactive capabilities of Matplotlib, and this | |
| will not appear in the static documentation. Please run this code on your | |
| machine to see the interactivity. | |
| You can copy and paste individual parts, or download the entire example | |
| using the link at the bottom of the page. | |
| """ | |
| from datetime import datetime | |
| import matplotlib.pyplot as plt | |
| import numpy as np | |
| def update_title(axes): | |
| axes.set_title(datetime.now()) | |
| axes.figure.canvas.draw() | |
| fig, ax = plt.subplots() | |
| x = np.linspace(-3, 3) | |
| ax.plot(x, x ** 2) | |
| # Create a new timer object. Set the interval to 100 milliseconds | |
| # (1000 is default) and tell the timer what function should be called. | |
| timer = fig.canvas.new_timer(interval=100) | |
| timer.add_callback(update_title, ax) | |
| timer.start() | |
| # Or could start the timer on first figure draw: | |
| # def start_timer(event): | |
| # timer.start() | |
| # fig.canvas.mpl_disconnect(drawid) | |
| # drawid = fig.canvas.mpl_connect('draw_event', start_timer) | |
| plt.show() | |