Centering and adding a push button to a grid window, TKinter

[deanhystad]

Sorry, I answered the wrong question again.

To place a frame in the middle of the window, use "frame.place(relx=0.5, rely=0.5, anchor=tk.CENTER)".

import tkinter as tk
import random


class FramedLabel(tk.Frame):
    """A label with a frame.  Looks suspiciously like a button."""
    def __init__(
            self,
            parent,
            text="",
            relief=tk.RAISED,
            borderwidth=4,
            font=(None, 10),
            width=10,
            height=3,
            **kwargs):
        super().__init__(
            parent, relief=relief, borderwidth=borderwidth, **kwargs
        )
        self.label = tk.Label(
            self, text=text, font=font, width=width, height=height
        )
        self.label.pack()

    def set_color(self, color):
        self["bg"] = color
        self.label["bg"] = color


class MyWindow(tk.Tk):
    def __init__(self):
        super().__init__()
        self.title("Feed Bins")
        self.geometry("800x400")

        frame = tk.Frame(self)
        frame.place(relx=0.5, rely=0.5, anchor=tk.CENTER)
        self.labels = [
            FramedLabel(frame, text=f"Bin {x}") for x in range(1, 16)
        ]
        for x, label in enumerate(self.labels):
            label.grid(row=x // 5, column=x % 5, padx=5, pady=5)
            label.set_color("lightgrey")

        button = tk.Button(frame, text="Update", command=self.check_alerts)
        button.grid(row=4, column=0, columnspan=5, sticky="news")

    def check_alerts(self):
        for label in self.labels:
            label.set_color(random.choice(("red", "lightgrey")))

 
MyWindow().mainloop() 

However, I prefer to pack the frame and set the borders to expand the window to the desired size.

import tkinter as tk
import random


class FramedLabel(tk.Frame):
    """A label with a frame.  Looks suspiciously like a button."""
    def __init__(
            self,
            parent,
            text="",
            relief=tk.RAISED,
            borderwidth=4,
            font=(None, 10),
            width=10,
            height=3,
            **kwargs):
        super().__init__(
            parent, relief=relief, borderwidth=borderwidth, **kwargs
        )
        self.label = tk.Label(
            self, text=text, font=font, width=width, height=height
        )
        self.label.pack()

    def set_color(self, color):
        self["bg"] = color
        self.label["bg"] = color


class MyWindow(tk.Tk):
    def __init__(self):
        super().__init__()
        self.title("Feed Bins")

        frame = tk.Frame(self)
        frame.pack(padx=100, pady=100)
        self.labels = [
            FramedLabel(frame, text=f"Bin {x}") for x in range(1, 16)
        ]
        for x, label in enumerate(self.labels):
            label.grid(row=x // 5, column=x % 5, padx=5, pady=5)
            label.set_color("lightgrey")

        button = tk.Button(frame, text="Update", command=self.check_alerts)
        button.grid(row=4, column=0, columnspan=5, sticky="news")

    def check_alerts(self):
        for label in self.labels:
            label.set_color(random.choice(("red", "lightgrey")))

 
MyWindow().mainloop() 

Either way, the real trick is to create a frame that holds your labels and buttons. Pack (or grid) the labels and buttons in the frame. Place or pack the frame in the window