I provide two convenience functions to create shorcuts. create_buddy creates a buddy for the provided label.A buddy establish a connection between a label and a related widget. It provides a quick keyboard shorcut to focus its partner widget. (Buddy is a terminology used in PyQt).
create_shortcut_to_button creates a shorcut to invoke a button.
I bind to toplevel containing the widget. This way, when the dialog is closed all the bindings disappear.
All shorcuts are of this form: Alt + letter
Buddies and shorcuts enriches the user experience providing new ways to navigate and interact quickly with the application.
Python, 88 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | def shortcut_for_underlining_text(widget, callback, ignore_case=True):
text = widget.cget("text")
if text == "":
raise Exception("No text for widget")
underline = widget.cget("underline")
if underline == -1:
raise Exception("No underline found on widget text")
toplevel = widget.winfo_toplevel()
char = text[underline]
if ignore_case:
hotkey = "<Alt-%s>"%char.lower()
toplevel.bind(hotkey, callback)
hotkey = "<Alt-%s>"%char.upper()
toplevel.bind(hotkey, callback)
else:
hotkey = "<Alt-%s>"%char
toplevel.bind(hotkey, callback)
def create_buddy(label, partner, ignore_case=True):
shortcut_for_underlining_text(label, lambda event: partner.focus(), ignore_case=ignore_case)
def create_shortcut_to_button(button, ignore_case=True):
shortcut_for_underlining_text(button, lambda event: button.invoke(), ignore_case=ignore_case)
if __name__ == "__main__":
try:
from Tkinter import Tk, Label, Entry, Toplevel, Button
from tkMessageBox import showinfo
except ImportError:
from tkinter import Tk, Label, Entry, Toplevel, Button
from tkinter.messagebox import showinfo
root = Tk()
root.wm_title("Login")
l= Label(root, text="User Name:", underline=5)
l.grid(row=0, column=0)
e = Entry(root)
e.grid(row=0, column=1)
create_buddy(l,e)
l= Label(root, text="Password:", underline=0)
l.grid(row=1, column=0)
e = Entry(root)
e.grid(row=1, column=1)
create_buddy(l,e)
def login():
showinfo("Login","Executed login callback")
button = Button(root, text="Log in", command=login, underline=0)
button.grid(row=2, column=0)
create_shortcut_to_button(button)
dialog = Toplevel(root)
dialog.wm_title("Sign up")
l= Label(dialog, text="Name:", underline=0)
l.grid(row=0, column=0)
e = Entry(dialog)
e.grid(row=0, column=1)
create_buddy(l,e)
l= Label(dialog, text="Address:", underline=0)
l.grid(row=1, column=0)
e = Entry(dialog)
e.grid(row=1, column=1)
create_buddy(l,e)
l= Label(dialog, text="Telephone:", underline=0)
l.grid(row=2, column=0)
e = Entry(dialog)
e.grid(row=2, column=1)
create_buddy(l,e)
root.mainloop()
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