wxpython single click/double click recognition

[Larz60+]

written on windows 7 using python 3.6.2, should work on any platform,
but not tested on Linux or OS-X

I've been doing a lot of playing around with wxpython for the past few weeks.
I needed a reliable routine that could distinguish between single and double
mouse clicks.

There is a good timer example in the demos that come with the wxpython phoenix
tarball, and I used this as the basis for this routine.

Here's how it works:

• wx.EVT_LEFT_DOWN is bound to on_left_down
  
• wx.EVT_LEFT_DCLICK is bound to on_dbl_click
  
• wx.EVT_TIMER is bound to single_click
  

when a EVT_LEFT_DOWN event is triggered, the timer is started

if another left click down event is triggered (recognized as a  EVT_LEFT_DCLICK),
the timer is stopped because, it's no longer needed, this is a double click.

After 250ms EVT_TIMER event occurs, that means that the full 250ms elapsed and the
event must be a single click. The timer is stopped and right click can be processed.

Here's the code:

#
# Single, Double click recognition for wxpython using
# a timer event -- should be very reliable --
#
import wx


class TrySingleDouble(wx.Frame):
   def __init__(self, title):
       wx.Frame.__init__(self, None, title=title, size=(350, 200))

       # Delay time of 500ms, is what's used by Microsoft, but this is too long
       # and can be a lot shorter (especially if used for gaming). Here I
       # use 300 ms.
       self.dbl_clk_delay = 250

       self.Bind(wx.EVT_LEFT_DOWN, self.on_left_down)
       self.Bind(wx.EVT_LEFT_DCLICK, self.on_dbl_click)
       self.Bind(wx.EVT_TIMER, self.single_click)

   def on_dbl_click(self, e):
       self.stop_timer()
       print('Double click')

   def on_left_down(self, e):
       self.start_timer()

   def start_timer(self):
       self.timer1 = wx.Timer(self)
       self.timer1.Start(self.dbl_clk_delay)

   def stop_timer(self):
       self.timer1.Stop()
       del self.timer1

   def single_click(self, e):
       self.stop_timer()
       print('Single_click')


def tst_app():
   app = wx.App(redirect=True)
   win = TrySingleDouble("Single-Double Click Test")
   win.Show()
   app.MainLoop()


if __name__ == '__main__':
   tst_app()