尝试将变量 "data" 从 "on_select" 传递给文本小部件

Question

我正在尝试将变量 "data" 从 "on_select" 传递到 Text-Widget。这样，某人导入的文件的内容就可以通过选择列表框中的项目来更改。但是我还是一个非常初学者，不知道如何传递数据的价值。有人可以在这里帮助我吗？谢谢！

from Tkinter import *
import tkFileDialog
root=Tk()
data = "Bitte eine Datei importieren."

class View(Listbox):
    def __init__(self, master):
        Listbox.__init__(self, master, width=75, selectmode=SINGLE)

class Controller(object):
    def __init__(self, master):
        self._master = master

        frame1 = Frame(self._master)
        frame1.pack(side=LEFT, fill=BOTH, padx=5,expand=True)

        self._Listbox=View(frame1)
        self._Listbox.pack(side = TOP,fill=BOTH, expand = True,pady=20)

        menubar = Menu(self._master)
        filemenu = Menu(menubar, tearoff=0)
        filemenu.add_command(label="Importieren", command = self.file_open)
        filemenu.add_command(label="Beenden", command = quit)
        menubar.add_cascade(label='File',menu=filemenu)
        self._master.config(menu=menubar)

    def on_select(event):
        filename = self._Listbox.get(self._Listbox.curselection()[0])

        global data
        data = "Test"

        with open(filename,'r') as f:
            data = f.readlines()
        print data

    self._Listbox.bind('<<ListboxSelect>>', on_select)      

    def file_open(self):
        filename = tkFileDialog.askopenfilename()
        self._Listbox.insert(END,filename)

T = Text(root, height=2, width=30)
T.pack()
T.insert(END, data)
print data           

if __name__ == "__main__":
    c=Controller(root)
    root.mainloop()

Answer 1

控制器需要了解文本小部件才能对其进行控制。因此，在创建控制器时传递文本小部件。

class Controller(object):
    def __init__(self, master, text):
        self.text = text
        ...
    def on_select(self, event):
        ...
        self.text.insert("end", data)
        ...
...
T = Text(...)
...
if __name__ == "__main__":
    c=Controller(root, T)

尝试将变量 "data" 从 "on_select" 传递给文本小部件

Trying to pass the variable "data" from "on_select" to the Text-Widget

python

variables

tkinter

global-variables