我有以下代码:
from tkinter import *
class GUI(Tk):
def __init__(self,*args,**kw):
super().__init__(*args,**kw)
self.frame = Frame(self)
self.frame.pack(fill=BOTH,expand=YES)
row = 0
self.source_lbl = Label(self.frame,text="Source:")
self.source_lbl.grid(column=0,row=row,sticky='w')
self.source_txt = Entry(self.frame,width=60)
self.source_txt.grid(column=1,row=row)
self.source_btn = Button(self.frame,text="Browse")
self.source_btn.grid(column=2,row=row)
row += 1
self.extra_frame = ExtraFrame(self.frame)
self.extra_frame.grid(row=row,columnspan=3,sticky='w')
class ExtraFrame(Frame):
def __init__(self,**kw)
self.pairs = []
self.key_lbl = Label(self,text="Key",anchor='w')
self.value_lbl = Label(self,text="Value",anchor='w')
self.add_btn = Button(self,text="+",command=self.add_pair)
self.add_btn.grid()
def add_pair(self):
pair_frame = KWFrame(self,pady=2)
self.pairs.append(pair_frame)
pair_frame.grid(row=len(self.pairs),columnspan=3)
self.update_labels_and_button()
def update_labels_and_button(self):
if self.pairs:
self.key_lbl.grid(column=0,row=0,sticky='w')
self.value_lbl.grid(column=1,sticky='w')
else:
self.key_lbl.grid_remove()
self.value_lbl.grid_remove()
self.add_btn.grid(row=len(self.pairs) + 1)
class KWFrame(Frame):
def __init__(self,**kw)
self.key_txt = Entry(self,width=30)
self.key_txt.grid(column=0,row=0)
self.value_txt = Entry(self,width=30)
self.value_txt.grid(column=1,row=0)
self.remove_btn = Button(self,text="-",command=self.remove)
self.remove_btn.grid(column=2,row=0)
def remove(self):
i = self.master.pairs.index(self)
del self.master.pairs[i]
for pair in self.master.pairs[i:]:
pair.grid(row=pair.grid_info()['row'] - 1)
self.master.update_labels_and_button()
self.destroy()
gui = GUI()
gui.mainloop()
这可以很好地与添加/删除新的文本输入行一起工作,只有一个问题:标签“ Key”和“ Value”与这些行中的相应输入字段不对齐(尽管具有正确的列)值)。有没有简单的方法可以使用这样的嵌套网格布局很好地对齐它们?