[英]Problems overriding delete method on ttk.Treeview
I am trying to create a subclass of ttk.Treeview mostly in order to keep an list of all of the used iids in the tree.我试图创建 ttk.Treeview 的子类,主要是为了保留树中所有使用的 iid 的列表。 So I am trying to override the delete method but keep getting an error when I try to call the super's delete method.
所以我试图覆盖 delete 方法,但是当我尝试调用 super 的 delete 方法时不断收到错误。
If I bypass the delete override then I get no errors.如果我绕过删除覆盖,那么我不会收到任何错误。 But with it in I get this error:
但是有了它,我收到了这个错误:
Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python3.5/tkinter/__init__.py", line 1553, in __call__
return self.func(*args)
File "/home/sean/.PyCharmCE2018.1/config/scratches/scratch_1.py", line 12, in but_handle
sl.delete(c)
File "/home/sean/.PyCharmCE2018.1/config/scratches/scratch_1.py", line 8, in delete
super(Tree, self).delete(self, items)
File "/usr/lib/python3.5/tkinter/ttk.py", line 1219, in delete
self.tk.call(self._w, "delete", items)
_tkinter.TclError: Item .140356823468016 not found
Here is the code:这是代码:
import tkinter as tk
from tkinter import ttk
class Tree(ttk.Treeview):
s = 1
def delete(self, *items):
super(Tree, self).delete(self, *items) # Error occurs here
# in use i will delete the iid from a list here
def but_handle():
for c in sl.get_children():
sl.delete(c)
if __name__ == '__main__':
root = tk.Tk()
but = tk.Button(command=but_handle)
but.pack(side='top')
sl = Tree()
sl.pack()
sl.insert('', 'end', None, text='a')
sl.insert('', 'end', None, text='b')
sl.insert('', 'end', None, text='c')
sl.insert('', 'end', None, text='d')
sl.insert('', 'end', None, text='e')
root.mainloop()
What am I doing wrong here?我在这里做错了什么?
self argument
is implicit, and should not be specified in function call explicitly. self argument
是隐式的,不应在函数调用中显式指定。
By calling super(Tree, self).delete(self, *items)
you' telling to delete self
and a child, which of course fails.通过调用
super(Tree, self).delete(self, *items)
你告诉删除self
和一个孩子,这当然失败了。
Solution is to change delete
call to:解决方案是将
delete
调用更改为:
super(Tree, self).delete(*items)
self. tk. call(self._w, "delete", items)
tkinter .特金特。 TclError: Item 0 not found
TclError:找不到项目 0
code def View(self): self.tr.delete(0,END) for i in p.select():代码 def View(self): self.tr.delete(0,END) for i in p.select():
self.tr.insert('',END,values=i)
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