python - Tkinter 文本滚动条走得太远

Question

我想知道为什么我的 scrollbar 对于我的 Tkinter Text widget 来说太过分了。我有一个底部标签，它应该填满下面的所有空间，但不知何故，滚动条超出了标签到达末尾。我不确定到底是哪个小部件导致了这个问题。

import tkinter as tk
import tkinter.filedialog

class TextLineNumbers(tk.Canvas):
    def __init__(self, *args, **kwargs):
        tk.Canvas.__init__(self, *args, **kwargs)
        self.textwidget = None

    def attach(self, text_widget):
        self.textwidget = text_widget

    def redraw(self, *args):
        '''redraw line numbers'''
        self.delete("all")

        i = self.textwidget.index("@0,0")
        while True:
            dline= self.textwidget.dlineinfo(i)
            if dline is None: break
            y = dline[1]
            linenum = str(i).split(".")[0]
            self.create_text(5,y,anchor="nw", text=linenum)
            i = self.textwidget.index("%s+1line" % i)

class CustomText(tk.Text): 
    def __init__(self, *args, **kwargs):
        tk.Text.__init__(self, *args, **kwargs)

        self.tk.eval('''
            proc widget_proxy {widget widget_command args} {

                # call the real tk widget command with the real args
                set result [uplevel [linsert $args 0 $widget_command]]

                # generate the event for certain types of commands
                if {([lindex $args 0] in {insert replace delete}) ||
                    ([lrange $args 0 2] == {mark set insert}) || 
                    ([lrange $args 0 1] == {xview moveto}) ||
                    ([lrange $args 0 1] == {xview scroll}) ||
                    ([lrange $args 0 1] == {yview moveto}) ||
                    ([lrange $args 0 1] == {yview scroll})} {

                    event generate  $widget <<Change>> -when tail
                }

                # return the result from the real widget command
                return $result
            }
            ''')
        self.tk.eval('''
            rename {widget} _{widget}
            interp alias {{}} ::{widget} {{}} widget_proxy {widget} _{widget}
        '''.format(widget=str(self)))

        self.comment = False

class Window(tk.Frame):
    def __init__(self, *args, **kwargs):
        tk.Frame.__init__(self, *args, **kwargs)
        self.bottomLabel()
        self.createtext()

    def createtext(self):
        self.text = CustomText(self, bd=0)  

        self.vsb = tk.Scrollbar(orient=tk.VERTICAL)
        self.text.configure(yscrollcommand=self.vsb.set)
        self.vsb.configure(command=self.text.yview)

        self.linenumbers = TextLineNumbers(self, width=55)
        self.linenumbers.attach(self.text)

        self.vsb.pack(side=tk.RIGHT, fill=tk.Y)
        self.linenumbers.pack(side="left", fill="y")
        self.text.pack(side="right", fill="both", expand=True)

        self.text.bind("<<Change>>", self._on_change)
        self.text.bind("<Configure>", self._on_change)

    def bottomLabel(self):
        self.label = tk.Label(self, text="Lorem ipsum", anchor=tk.W)
        self.label.pack(fill=tk.X, side=tk.BOTTOM)

    def _on_change(self, event):
        self.linenumbers.redraw()

if __name__ == "__main__":
    root = tk.Tk()
    root.title("Window")
    window = Window(root).pack(side="top", fill="both", expand=True)
    root.mainloop()

Answer 1

这将解决您的问题:

改变self.vsb = tk.Scrollbar(orient=tk.VERTICAL)

至

编辑:

self.vsb = tk.Scrollbar(master=self, orient=tk.VERTICAL)