python tkinter text中光标所在行_Python如何在Tkinter文本窗口中获取光标位置

我想得到a的插入点的光标位置(行和列)Tkinter.文本,但具体情况如下。在

问题:我的文本编辑器项目需要自定义的撤消/重做Tkinter.文本. 我为下面的测试1和测试2输入了相同的字符串,但是由于Tkinter给出的KeyRelease事件处理程序中的列变量不一致,undo的操作并不一致。问题似乎是我在第二个测试中输入太快,这会产生一个错误的列值。你能帮我找到问题吗?在

复制错误的两个测试过程:

测试一慢慢地键入这个字符串:“一二三”

按F1查看每个单词撤消。在

结果:效果良好。(至少对我来说。浮肿:慢慢打字。)

测试二尽快键入相同的字符串:“一二三”

按F1查看每个单词撤消。在

结果:获取错误的列,并且无法正确撤消。(重新启动脚本并重复此步骤如果您一开始没有看到错误,它有时可以很好地快速键入。我通常最多尝试3到4次。)

问:这是Tkinter中的一个bug,还是我不理解Tkinter中某些特定的东西会为我的undo/redo记录生成一致的列?在from Tkinter import *

class TextView(Text):

def __init__(self, root):

Text.__init__(self, root)

self.history = History(self)

self.bind("", self.keyRelease)

# used to capture a char at a time in keyRelease. If space char is pressed it creates a Word object and adds it to undo/redo history.

self.word = ""

def keyRelease(self, event):

if event.keysym == "space":

self.word += " "

self.makeWordRecord()

else:

self.word += event.char

def makeWordRecord(self, ):

if len(self.word):

index = self.index(INSERT)

wordEvent = Word(index, self.word)

self.history.addEvent(wordEvent)

self.word = ""

def undo(self, event):

self.makeWordRecord()

self.history.undo()

def redo(self, event):

self.history.redo()

class History(object):

def __init__(self, text):

self.text = text

self.events = []

self.index = -1

# create blank document record, line one, column one, no text

self.addEvent(Word("1.0", ""))

def addEvent(self, event):

if self.index +1 < len(self.events):

self.events = self.events[:self.index +1]

self.events.append(event)

self.index +=1

def undo(self):

if self.index > 0:

self.events[self.index].undo(self.text)

self.index -=1

def redo(self):

if self.index +1 < len(self.events):

self.index +=1

self.events[self.index].redo(self.text)

class Word(object):

def __init__(self, index, word):

self.index = index

self.word = word

def undo(self, text):

line = self.index.split(".")[0]

column = int(self.index.split(".")[-1])

startIndex = line + "." + str(column - len(self.word))

endIndex = line + "." + str(int(column))

text.delete(startIndex, endIndex)

def redo(self, text):

line = self.index.split(".")[0]

column = int(self.index.split(".")[-1])

startIndex = line + "." + str(column - len(self.word))

text.insert(startIndex, self.word)

if __name__ == "__main__":

root = Tk()

root.geometry("400x200+0+0")

textView = TextView(root)

textView.pack()

root.bind("", textView.undo)

root.bind("", textView.redo)

root.mainloop()

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