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KeyPress event with holding down the key

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Join Date: Feb 2007

Posts: 77

Reputation: aot is an unknown quantity at this point

Solved Threads: 1

aot

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Junior Poster in Training

Re: KeyPress event with holding down the key

#11

Mar 2nd, 2007

Ah, thanks to both of you. Yup, as far as I can tell, it's interpreting the continuous press as you said, as a repeated keypress/keyrelease event pair. My guess is that it's to do with the Mac or possibly the version of Tkinter I'm using.

I'm looking forward to what you find out, Jeff. Could you please post it here or send me a private message when you hear?

Cheers,

Aot

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Join Date: Oct 2004

Posts: 3,862

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vegaseat

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DaniWeb's Hypocrite

Re: KeyPress event with holding down the key

#12

Mar 2nd, 2007

You will have to sit there with a stopwatch, but this could do the timing for you ...

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
# count how many times the keyboard is scanned on
# one continuous keypress of character 'a' 
import Tkinter as tk
class MyFrame(tk.Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master)
        # method call counter
        self.counter_press = 0
        self.pack()
        root.bind_all('<a>', self.key_press)
 
    def key_press(self, event):
        self.counter_press += 1
        # show result in title
        root.title(str(self.counter_press))
 
root = tk.Tk()
root.geometry("400x30+0+0")
app1 = MyFrame(root)
root.mainloop()
# count how many times the keyboard is scanned on
# one continuous keypress of character 'a' 
import Tkinter as tk
class MyFrame(tk.Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master)
        # method call counter
        self.counter_press = 0
        self.pack()
        root.bind_all('<a>', self.key_press)
        
    def key_press(self, event):
        self.counter_press += 1
        # show result in title
        root.title(str(self.counter_press))
        
root = tk.Tk()
root.geometry("400x30+0+0")
app1 = MyFrame(root)
root.mainloop()

May 'the Google' be with you!

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Join Date: Nov 2007

Posts: 1

Reputation: Quarks is an unknown quantity at this point

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Quarks

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Newbie Poster

Re: KeyPress event with holding down the key

#13

Nov 4th, 2007

I was having the same problem, the ideas here brought me to the solution, using the after_idle methode:

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
from Tkinter import *
 
class MyFrame(Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master)
        # method call counter
        self.pack()
        self.afterId = None
        root.bind('<KeyPress-a>', self.key_press)
        root.bind('<KeyRelease-a>', self.key_release)
 
    def key_press(self, event):
        if self.afterId != None:
            self.after_cancel( self.afterId )
            self.afterId = None
        else:
            print 'key pressed %s' % event.time
 
    def key_release(self, event):
        self.afterId = self.after_idle( self.process_release, event )
 
    def process_release(self, event):
        print 'key release %s' % event.time
        self.afterId = None
 
 
 
root = Tk()
root.geometry("400x30+0+0")
app1 = MyFrame(root)
root.mainloop()
from Tkinter import *

class MyFrame(Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master)
        # method call counter
        self.pack()
        self.afterId = None
        root.bind('<KeyPress-a>', self.key_press)
        root.bind('<KeyRelease-a>', self.key_release)
        
    def key_press(self, event):
        if self.afterId != None:
            self.after_cancel( self.afterId )
            self.afterId = None
        else:
            print 'key pressed %s' % event.time

    def key_release(self, event):
        self.afterId = self.after_idle( self.process_release, event )

    def process_release(self, event):
        print 'key release %s' % event.time
        self.afterId = None

        
        
root = Tk()
root.geometry("400x30+0+0")
app1 = MyFrame(root)
root.mainloop()