{"id":461,"date":"2018-07-07T07:15:14","date_gmt":"2018-07-07T05:15:14","guid":{"rendered":"http:\/\/pythonprogramming.altervista.org\/?p=461"},"modified":"2019-09-14T11:55:04","modified_gmt":"2019-09-14T09:55:04","slug":"tkinter-key-binding","status":"publish","type":"post","link":"https:\/\/pythonprogramming.altervista.org\/tkinter-key-binding\/","title":{"rendered":"Tkinter – Key binding"},"content":{"rendered":"

Bind a key (any key)<\/h2>\n
import tkinter as tk\r\n\r\n\r\nkeyspressed = 0\r\ndef key():\r\n    global keyspressed\r\n    print(f\"Pressed a key: {keyspressed} times\")\r\n    keyspressed += 1\r\n\r\nroot = tk.Tk()\r\nroot.bind(\"<Key>\", lambda x: key())\r\nlabel = tk.Label(root, text=\"Press a key and look at the console\")\r\nlabel.pack()\r\nroot.mainloop()<\/pre>\n
Press a particular key<\/h2>\n
root.bind(\"<c>\", lambda x: key())<\/pre>\n
Press ctrl + a key<\/h2>\n
root.bind(\"<Control-c>\", lambda x: key())<\/pre>\n
Select an item in the listbox<\/h2>\n
def sel():\r\n    print(\"An item has been selected\")\r\n\r\nlistbox = tk.Listbox(root)\r\nlistbox.pack()\r\nlistbox.bind(\"<<ListboxSelect>>\", lambda x: sel())\r\n<\/pre>\n
Double click on an item in a listbox<\/h2>\n
def double_clicked():\r\n    print(\"An item has been double clicked\")\r\n\r\nlistbox = tk.Listbox(root)\r\nlistbox.pack()\r\nlistbox.bind(\"<Double-Button>\", lambda x: double_clicked())<\/pre>\n
 <\/p>\n
Key binding with tkinter<\/h2>\n
In another post<\/a> we’ve yet seen how to bind the click of a mouse<\/strong>(<Button-1>) to intercept the user action and make the computer do something. We also tryied to apply the code to an example of a little game.<\/p>\n
Now we want to see another example, but with the use of Key (<Key>) binding.<\/p>\n
A basic example of Key binding<\/h2>\n
This example show you how is the syntax to bind a key event and how we can grab the key pressed showing it to the console. In the next video we will add some code to make a more complex example of its possible use.<\/p>\n