Question

我正在尝试创建一个Tkinter窗口类，其中包含一个带有基于tkinter Toplevel类的滚动条的画布。当我运行我的代码时，我没有收到任何错误，但窗口中的滚动条被禁用。在程序运行后手动拉伸时，具有信息的框架或画布不会随窗口拉伸。这是错误的代码：

class new_window(Toplevel):

    def __init__(self,master):
        Toplevel.__init__(self,master)


        self.grid_rowconfigure(0, weight=1)
        self.grid_columnconfigure(0, weight=1)

        s = Scrollbar(self, orient = VERTICAL)
        s.grid(row = 0, column = 1, sticky = NS)
        self.can = Canvas(self,  yscrollcommand=s.set)
        self.can.grid(row = 0, column = 0, sticky = N+S+E+W)
        self.win = Frame(self.can)
        self.can.create_window(0,0, window = self.win, anchor = NW)
        s.config(command = self.can.yview)

        size = (self.win.winfo_reqwidth(), self.win.winfo_reqheight())
        self.can.config(scrollregion="0 0 %s %s" % size)

        self.win.update_idletasks()
        self.ca.configure(scrollregion = (1,1,win.winfo_width(),win.winfo_height()))


    def create(self):
        for i in range (100):
            i = Label(self.win, text = str(i))
            i.grid()


root = Tk()

win = new_window(root)
win.create()
root.mainloop()

在我决定实现类之前它工作正常：

from Tkinter import *

root = Tk()

window = Toplevel()
window.grid_rowconfigure(0, weight=1)
window.grid_columnconfigure(0, weight=1)

s = Scrollbar(window, orient = VERTICAL)
s.grid(row = 6, column = 1, sticky = NS)
can = Canvas(window, width = 1600, height = 700, yscrollcommand=s.set)
can.grid(row = 6, column = 0, sticky = NSEW)
win = Frame(can)
can.create_window(0,0, window = win, anchor = NW)
s.config(command = can.yview)

for i in range(100):
    lbl = Label(win, text = str(i))
    lbl.grid()

win.update_idletasks()
can.configure(scrollregion = (1,1,win.winfo_width(),win.winfo_height()))

root.mainloop()

我不确定过渡到哪里出错，任何帮助都会非常感激。

Answer 1

我认为问题来自这里：

self.win.update_idletasks()
self.ca.configure(scrollregion = (1,1,win.winfo_width(),win.winfo_height()))

这是在初始化函数内部，它应该在调用create函数后更新。仍然可能有一种更有效的方法来构建它，但这应该在此期间起作用：

from Tkinter import *

class new_window(Toplevel):

    def __init__(self,master):
        Toplevel.__init__(self,master)

        self.grid_rowconfigure(0, weight=1)
        self.grid_columnconfigure(0, weight=1)

        s = Scrollbar(self, orient = VERTICAL)
        s.grid(row = 0, column = 1, sticky = NS)
        self.can = Canvas(self,  yscrollcommand=s.set)
        self.can.grid(row = 0, column = 0, sticky = N+S+E+W)
        self.win = Frame(self.can)
        self.can.create_window(0,0, window = self.win, anchor = NW)
        s.config(command = self.can.yview)

        size = (self.win.winfo_reqwidth(), self.win.winfo_reqheight())
        self.can.config(scrollregion="0 0 %s %s" % size)

    def create(self):
        for i in range (100):
            i = Label(self.win, text = str(i))
            i.grid()
        self.win.update_idletasks()
        self.can.configure(scrollregion = (1,1,self.win.winfo_width(),self.win.winfo_height()))

root = Tk()

win = new_window(root)
win.create()
root.mainloop()

Tkinter，画布无法滚动

1 个答案: