I want to get the cursor position (line and column) of the insertion point of a
Tkinter.Text, but you may assume the answer is easy until you run this simple
test run. Acutally I hope someone finds it easy.
PROBLEM: My text editor project requires a custom undo/redo for Tkinter.Text. I
put in the same string for both Test One and Test Two below, but undo does not
act consistently due to a inconsistent column variable in KeyRelease event
handler given by Tkinter. The problem seems to be that I type too fast for
second test which produces a bad column value. Can you help me find the problem?
TWO TEST PROCESS TO REPRODUCE THE ERROR:
TEST ONE
Type this string slowly: 'one two three'
Press F1 to see each word undo.
Result: Works fine. (For me atleast. Ephasis: type slowly.)
TEST TWO
Type the same string as fast as you can: 'one two three'
Press F1 to see each word undo.
Result: Gets the wrong column and does not undo properly. (Restart script
and repeat this step if you don't see the error at first, it sometimes works
fine with fast typing. I usually get it with 3 to 4 tries at the most.)
QUESTION: Is this a bug in Tkinter, or am I not understanding something
specific within Tkinter that would produce consistent columns for my undo/redo
records?
from Tkinter import *
class TextView(Text):
def __init__(self, root):
Text.__init__(self, root)
self.history = History(self)
self.bind("<KeyRelease>", self.keyRelease)
# used to capture a char at a time in keyRelease. If space char is
pressed it , self.word)
if __name__ == "__main__":
root = Tk()
root.geometry("400x200+0+0")
textView = TextView(root)
textView.pack()
root.bind("<F1>", textView.undo)
root.bind("<F2>", textView.redo)
root.mainloop()
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