Sep-18-2018, 07:21 AM
Hi all.
I have an issue with a picking event using the matplotlib library. I am trying to pick a vertical line that I draw on a X-Y plot when I click near the line. However, wherever I click, the line is picked, and I do not understand why.
Here's my code:
Any idea?
I have an issue with a picking event using the matplotlib library. I am trying to pick a vertical line that I draw on a X-Y plot when I click near the line. However, wherever I click, the line is picked, and I do not understand why.
Here's my code:
import numpy as np import matplotlib.pyplot as plt class my_class: def __init__( self , **kwargs ): self.fig , self.ax = plt.subplots() self.line = self.ax.axvline( x = 0.5 , **kwargs ) self.connect() plt.show() return def connect( self ): cid = self.fig.canvas.mpl_connect( 'button_press_event' , self.on_click ) return def on_click( self , event ): if self.line.contains( event ): print( "Line picked." ) return def main(): my_plot = my_class( pickradius = .5 ) if __name__ == "__main__": main()The constructor creates the plot, the line, and connects to mouse events via the function "connect". The function "on_click" is a callback function to mouse clicking events that (should) print "Line picked." whenever I click near the line. But it prints "Line picked" wherever I click.
Any idea?