滚动条在Tkinter中使用网格布局滚动文本小部件

Question

I am trying to use the grid layout manager in Tkinter to create a dialog box. I want the Text area at the bottom to have a scrollbar. Unfortunately I can not figure out how to make the scrollbar be the same height as the Text widget beside it. The sample below shows that the scrollbar is in the right position but is the wrong size (only about 10% of the height of the Text widget).

from tkinter import *

class queryrunner(Tk):
    def __init__(self,parent):
        Tk.__init__(self,parent)
        self.parent = parent
        self.minsize(width=800,height=500)
        self.initialize()

    def initialize(self):
        self.grid_columnconfigure(2,weight=1)
        self.grid_columnconfigure(3,weight=1)
        self.grid_columnconfigure(6,weight=2)
        self.grid_rowconfigure(0,weight=1)
        self.grid_rowconfigure(1,weight=1)
        self.grid_rowconfigure(2,weight=1)
        self.grid_rowconfigure(3,weight=1)
        self.grid_rowconfigure(4,weight=1)
        # BUCKET AND N1QL LABEL + INPUT PAIRS: 
        self.label = Label(self,text="Bucket", width=10, anchor="w")
        self.label.grid(column=0,row=0,columnspan=1,sticky='W')
        self.entry = Entry(self);
        self.entry.grid(column=1,row=0, columnspan=3, sticky='EW')
        self.entry.insert(0, "couchbase://couchbase1.mycompany.com/beer-sample" )
        # EXECUTE N1QL QUERY AGAINST BUCKET WHEN BUTTON CLICKED:
        self.button = Button(self,text="Go",width=20)
        self.button.grid(column=6,row=0)
        self.label2 = Label(self,text="N1QL", anchor="w")
        self.label2.grid(column=0,row=1,columnspan=1,sticky='W')
        self.entry2 = Text(self,height=5);
        self.entry2.grid(column=1,row=1, columnspan=3, rowspan=1, sticky='W')

        self.label3 = Label(self,text="Output:", width=50,anchor="w")
        self.label3.grid(column=0,row=4,columnspan=5,sticky='W')
        self.entry3 = Text(self,height=18)
        self.entry3.grid(column=1,row=5, columnspan=5, rowspan=1, sticky='W')
        # PROBLEM: GET SCROLLBAR TO BE THE RIGHT SIZE (IT'S NOT THE SIZE OF THE THING ITS BESIDE)
        self.scrollbar = Scrollbar(self) # height= not permitted here!
        self.entry3.config(yscrollcommand= self.scrollbar.set)
        self.scrollbar.config(command= self.entry3.yview)
        self.grid()
        self.scrollbar.grid(column=6, row=5, rowspan=2,  sticky='W')


if __name__ == "__main__":
    app = queryrunner(None)
    #font.nametofont('TkDefaultFont').configure(size = 10 )
    app.title('Couchbase N1QL Query Runner')
    app.mainloop()

Answer 1

将North和South添加到Scrollbar网格调用的粘性选项，以便滚动条在垂直方向上拉伸。

self.scrollbar.grid(column=6, row=5, rowspan=2,  sticky=N+S+W)

Answer 2

You can only use one geometry manager on each of a container's child widgets, but if a child widget is itself a container, you can use any geometry manager you like for its children. This means we can just make a Frame and pack() the Entry and Scrollbar into it, using the fill='y' argument to make the Scrollbar fill the available space.

Change this:

self.entry3 = Text(self,height=18)
self.entry3.grid(column=1,row=5, columnspan=5, rowspan=1, sticky='W')
# PROBLEM: GET SCROLLBAR TO BE THE RIGHT SIZE (IT'S NOT THE SIZE OF THE THING ITS BESIDE)
self.scrollbar = Scrollbar(self) # height= not permitted here!
self.entry3.config(yscrollcommand= self.scrollbar.set)
self.scrollbar.config(command= self.entry3.yview)
self.grid()
self.scrollbar.grid(column=6, row=5, rowspan=2,  sticky='W')

to this:

self.frame = Frame(self)
self.frame.grid(column=1,row=5, columnspan=6, rowspan=1, sticky='W')
self.entry3 = Text(self.frame,height=18)
self.entry3.pack(side='left', fill='both', expand=True)
# PROBLEM: SOLVED
self.scrollbar = Scrollbar(self.frame) # height= not permitted here!
self.entry3.config(yscrollcommand= self.scrollbar.set)
self.scrollbar.config(command= self.entry3.yview)
self.grid()
self.scrollbar.pack(side='right', fill='y')

Answer 3

There is the ScrolledText module.

If you are using Anaconda python distribution then in conda command line do:

 conda install ScrolledText

Then in your .py file import module (if python 3 and up)

 from tkinter.scrolledtext import ScrolledText

And if python 2.7 then

 import ScrolledText

Then you call it like a normal Text widget like so, in python 3:

self.textBox = ScrolledText(self, borderwidth=3, relief="sunken")

It is a compound widget (Text & Scrollbar).