I wrote a code that handles different events for both - mouse single-click and double click. The problem is that each time that user double-click the mouse it triggers also single-click and after that trigger the double-click event.
I want that double-click will trigger only one event!! the double-click event.
Any suggestions?
Thanks
As linked by @ThomasKühn, the answer is to create a software debounce. There are several ways to go about it, and the solution probably depends on your application (are you using a GUI, what backend, etc.) To be as agnostic as possible, I've implemented my solution using a one-shot thread from the threading module.
import threading
import matplotlib.pyplot as plt
DEBOUNCE_DUR = 0.25
t = None
def on_press(event):
global t
if t is None:
t = threading.Timer(DEBOUNCE_DUR, on_singleclick, [event])
t.start()
if event.dblclick:
t.cancel()
on_dblclick(event)
def on_dblclick(event):
global t
print("You double-clicked", event.button, event.xdata, event.ydata)
t = None
def on_singleclick(event):
global t
print("You single-clicked", event.button, event.xdata, event.ydata)
t = None
fig, ax = plt.subplots()
cid = fig.canvas.mpl_connect('button_press_event', on_press)
plt.show()
As I was looking for a solution for a embedded Matplotlib canvas in Tkinter, I came up for another solution (since the accepted answer doesn't work quite well in that case) here is a codesnipped which will hopefully help others struggling with tkinter and matplotlib:
def _on_click_debounce(self,event):
if self._job is None:
self._job = root.after(self.DEBOUNCE_DUR, lambda: self._on_click(event))
if event.dblclick:
root.after_cancel(self._job)
self._job = None
self._on_dblclick(event)
def _on_dblclick(self,event):
print('dblclick!')
def _on_click(self,event):
print('singleclick!')
self._job = None
The function _on_click_debounce gets handed over to the matplotlib eventhandling (fig.canvas.mpl_connect('button_press_event', _on_click_debounce)) and root is just the global root = tkinter.Tk() of tkinter