Question

目标：我在列表框中选择一个选项。我想强调黄色选项。

问题：所有先前选择的选项也以黄色突出显示。我希望将最新的选择保留为黄色，列表框中的其他所有内容都保留为白色。

import tkinter as tk


root = tk.Tk()
fontfamily = tk.font.families()

def selectcolor(col=None):
    fontlist.config(bg='white') ##<--PROBLEM CODE
    option_selected = fontlist.curselection()
    fontlist.itemconfig(option_selected[0], bg='yellow')

fontlist = tk.Listbox (root, bg='white')
fontlist.grid()

for eachfont in fontfamily:
    fontlist.insert(tk.END, eachfont)

fontlist.bind('<<ListboxSelect>>', selectcolor)
##<<ListboxSelect>> is magic, this option is not shown in_
##ebook John Shipman tkinter 8.5 reference
##.curselection() doesn't work as expected

tk.mainloop()

Answer 1

之前的项目保留黄色背景，因为您不会将其更改回来（这需要记住标记的最后一项）。但是使用selectbackground选项要容易得多。为了您的目的，以下是否有任何问题？

import tkinter as tk
root = tk.Tk()
box = tk.Listbox(selectforeground='black', selectbackground='yellow')
box.pack()
box.insert('end', 'one', 'two', 'three')
#root.mainloop()

Answer 2

您可以对selectbackground对象使用ListBox选项。您不需要使用fontlist.config(bg='white')行。解决方案就是这样：

import tkinter as tk


root = tk.Tk()
fontfamily = tk.font.families()

def selectcolor(col=None):
    fontlist.config(bg='white') ##unnecessary
    option_selected = fontlist.curselection()
    fontlist.itemconfig(option_selected[0], selectbackground='yellow')

fontlist = tk.Listbox (root, bg='white')
fontlist.grid()

for eachfont in fontfamily:
    fontlist.insert(tk.END, eachfont)

fontlist.bind('<<ListboxSelect>>', selectcolor)
##<<ListboxSelect>> is magic, this option is not shown in_
##ebook John Shipman tkinter 8.5 reference
##.curselection() doesn't work as expected

tk.mainloop()

由于问题，我编辑了代码。

import tkinter as tk


root = tk.Tk()
fontfamily = tk.font.families()


#you don't need to define a function to change highlight color.


fontlist = tk.Listbox (root, bg='white', selectbackground='yellow') #add selectbackground='yellow' here.
fontlist.grid()

for eachfont in fontfamily:
    fontlist.insert(tk.END, eachfont)

#So it is necessary to bind a function now :)

tk.mainloop()

如何刷新tkinter列表框

2 个答案: