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()
Diff to Previous Revision
--- revision 1 2017-04-07 11:42:26
+++ revision 2 2017-04-07 11:45:19
@@ -2,12 +2,12 @@
text = widget.cget("text")
if text == "":
- raise Exception("Text of label widget is empty")
+ raise Exception("No text for widget")
underline = widget.cget("underline")
if underline == -1:
- raise Exception("Widget has no underline")
+ raise Exception("No underline found on widget text")
toplevel = widget.winfo_toplevel()
char = text[underline]
