Python Tkinter Grid 列宽不需要扩展第一行不可 Scorallable

Question

我有带滚动条的三列，它需要扩展，并且应该拉伸窗口大小，但我无法根据屏幕大小增加列宽，我需要顶部第一行应该需要稳定，就像标题一样。代码如下

import tkinter as tk
from tkinter import *
from tkinter import ttk

root = tk.Tk()
root.title("TEST")
root.geometry("800x600")

frame=ttk.Frame(root)
frame.pack(expand=1, fill=BOTH)

canvas = tk.Canvas(frame)
scrollbar = ttk.Scrollbar(frame, orient="vertical", command=canvas.yview)
canvas.configure(yscrollcommand=scrollbar.set)

frame3s = ttk.Frame(canvas)
frame3s.bind("<Configure>", lambda e: canvas.configure(scrollregion=canvas.bbox("all")))

RCnt = 0
DataRow = {}
LabCnt = 0;
for gh in range(40):
   DataRow[LabCnt] = ttk.Label(frame3s, text=LabCnt, font=("Arial", 16, "bold"),cursor="hand2", justify=tk.CENTER,relief="solid")
   DataRow[LabCnt].grid(row=RCnt, column=0, sticky='ew')
   LabCnt += 1
   DataRow[LabCnt] = ttk.Label(frame3s, text=LabCnt, font=("Arial", 16, "bold"),cursor="hand2", justify=tk.CENTER,relief="solid")
   DataRow[LabCnt].grid(row=RCnt, column=1, sticky='ew')
   LabCnt += 1
   DataRow[LabCnt] = ttk.Label(frame3s, text=LabCnt, font=("Arial", 16, "bold"),cursor="hand2", justify=tk.CENTER,relief="solid")
   DataRow[LabCnt].grid(row=RCnt, column=2, sticky='ew')
   LabCnt += 1
   RCnt += 1
   frame3s.columnconfigure(gh, weight=1)
   frame3s.rowconfigure(gh, weight=1)

frame.columnconfigure(0, weight=1)
frame.rowconfigure(0, weight=1)

canvas.create_window((0, 0), window=frame3s, anchor="nw")
canvas.grid(row=0, column=0, sticky="nsew")
scrollbar.grid(row=0, column=1, sticky="ns")

def _on_mousewheel(event):
   canvas.yview_scroll(int(-1 * (event.delta / 120)), "units")
canvas.bind_all("<MouseWheel>", _on_mousewheel)
while True:
   root.update()

请指导我根据屏幕尺寸实现扩展列宽

Answer 1

如果您想扩展列以适应画布宽度，您需要：

• 保存

  canvas.create_window((0, 0), window=frame3s, ...)

的商品ID
• 使用

  frame3s

   将 

  canvas

   的宽度设置为与 

  <Configure>

   上事件 

  canvas

   的回调中 

  canvas.itemconfig()
的宽度相同
• 使用

  weight=1

   将第 0 列上的 

  frame3s.columnconfigure()
设置为 2

以下是更新后的代码：

import tkinter as tk
from tkinter import ttk

root = tk.Tk()
root.title("TEST")
root.geometry("800x600")

frame = ttk.Frame(root)
frame.pack(expand=1, fill=tk.BOTH)

canvas = tk.Canvas(frame, bg='pink')
scrollbar = ttk.Scrollbar(frame, orient="vertical", command=canvas.yview)
canvas.configure(yscrollcommand=scrollbar.set)

frame3s = ttk.Frame(canvas)
frame3s.bind("<Configure>", lambda e: canvas.configure(scrollregion=canvas.bbox("all")))

RCnt = 0
DataRow = {}
LabCnt = 0;
for gh in range(40):
   DataRow[LabCnt] = ttk.Label(frame3s, text=LabCnt, font=("Arial", 16, "bold"), cursor="hand2", justify=tk.CENTER, relief="solid")
   DataRow[LabCnt].grid(row=RCnt, column=0, sticky='ew')
   LabCnt += 1
   DataRow[LabCnt] = ttk.Label(frame3s, text=LabCnt, font=("Arial", 16, "bold"), cursor="hand2", justify=tk.CENTER, relief="solid")
   DataRow[LabCnt].grid(row=RCnt, column=1, sticky='ew')
   LabCnt += 1
   DataRow[LabCnt] = ttk.Label(frame3s, text=LabCnt, font=("Arial", 16, "bold"), cursor="hand2", justify=tk.CENTER, relief="solid")
   DataRow[LabCnt].grid(row=RCnt, column=2, sticky='ew')
   LabCnt += 1
   RCnt += 1

# expand column 0 to 2 to fill the width of the frame
frame3s.columnconfigure((0,1,2), weight=1)

frame.columnconfigure(0, weight=1)
frame.rowconfigure(0, weight=1)

# save the item ID of frame3s
frame_id = canvas.create_window((0, 0), window=frame3s, anchor="nw")

canvas.grid(row=0, column=0, sticky="nsew")
scrollbar.grid(row=0, column=1, sticky="ns")

def _on_mousewheel(event):
   canvas.yview_scroll(int(-1 * (event.delta / 120)), "units")

canvas.bind_all("<MouseWheel>", _on_mousewheel)

# set width of frame3s to the same as that of the canvas
canvas.bind('<Configure>', lambda e: canvas.itemconfig(frame_id, width=e.width))

root.mainloop()  # using .mainloop() instead of while loop