[英]how do I dynamically change ttk button font color and background
我尝试了各种方法来做到这一点,但我错过了一些东西。 在开始时,我认为我需要创建一种样式并将其分配给按钮
st = ttk.Style()
st.configure('blueTButton', foreground="white", background="blue")
Btn.configure(style='blueTButton')
但我收到一个错误:_tkinter.TclError: Layout blueTButton not found
所以我尝试了这个:
Btn.configure(foreground = 'red')
# and also
Btn.config(foreground = 'red')
以及许多其他愚蠢的尝试。
有人可以帮忙吗?
由于您使用的是ttk
package,因此您必须使用Style
将任何修改应用于从该 package 使用的小部件。
要动态更改它们,例如按下按钮,请将小部件的引用传递给 function 以执行您喜欢的任何操作。 我个人还决定传递对Style
object 的引用,因此不需要在每个 function 调用中重新创建它。 修改此示例代码以满足您的需要。
import tkinter as tk
# Using cycle for demonstration purposes
from itertools import cycle
from tkinter import ttk
class TKTEST:
def __init__(self) -> None:
self.tkapp()
def tkapp(self) -> None:
root = tk.Tk()
root.title("Test Dynamic Color Change")
root.geometry("300x300")
# Create style object before button
style = ttk.Style()
# Create a collection of colors to cycle through
colors = cycle(["#e9c46a","#e76f51","#264653","#2a9d8f","#e85d04","#a2d2ff","#06d6a0","#4d908e"])
# Using pack() to stretch out the frame to the size of the window
mainframe = ttk.Frame(master=root, relief="groove")
mainframe.pack(fill="both", expand=True)
# Use place() to center the button horizontally and vertically in the frame
# Use a lambda function to be able to pass arguments to the called function
button = ttk.Button(master=mainframe, text="Change Colors", command=lambda: self.change_frame_color(mainframe, style, colors))
button.place(relx=0.5, rely=0.5, anchor="center")
root.mainloop()
# Using type hinting with method arguments
def change_frame_color(self, objFrame: ttk.Frame, style: ttk.Style, colors: cycle) -> None:
# First, apply a style to frame since we're using ttk package
objFrame.configure(style="Mainframe.TFrame")
# Second, configure the style with a background color
style.configure("Mainframe.TFrame", background=next(colors))
tktest = TKTEST()
每次按下按钮都会更改框架的颜色:
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.