解释:
这实际上可以通过使用绑定来实现。看看下面这个粗略的例子:
from tkinter import *
from PIL import Image, ImageTk
root = Tk()
root.geometry('600x600')
min_w = 50 # Minimum width of the frame
max_w = 200 # Maximum width of the frame
cur_width = min_w # Increasing width of the frame
expanded = False # Check if it is completely exanded
def expand():
global cur_width, expanded
cur_width += 10 # Increase the width by 10
rep = root.after(5,expand) # Repeat this func every 5 ms
frame.config(width=cur_width) # Change the width to new increase width
if cur_width >= max_w: # If width is greater than maximum width
expanded = True # Frame is expended
root.after_cancel(rep) # Stop repeating the func
fill()
def contract():
global cur_width, expanded
cur_width -= 10 # Reduce the width by 10
rep = root.after(5,contract) # Call this func every 5 ms
frame.config(width=cur_width) # Change the width to new reduced width
if cur_width <= min_w: # If it is back to normal width
expanded = False # Frame is not expanded
root.after_cancel(rep) # Stop repeating the func
fill()
def fill():
if expanded: # If the frame is exanded
# Show a text, and remove the image
home_b.config(text='Home',image='',font=(0,21))
set_b.config(text='Settings',image='',font=(0,21))
ring_b.config(text='Bell Icon',image='',font=(0,21))
else:
# Bring the image back
home_b.config(image=home,font=(0,21))
set_b.config(image=settings,font=(0,21))
ring_b.config(image=ring,font=(0,21))
# Define the icons to be shown and resize it
home = ImageTk.PhotoImage(Image.open('home.png').resize((40,40),Image.ANTIALIAS))
settings = ImageTk.PhotoImage(Image.open('settings.png').resize((40,40),Image.ANTIALIAS))
ring = ImageTk.PhotoImage(Image.open('ring.png').resize((40,40),Image.ANTIALIAS))
root.update() # For the width to get updated
frame = Frame(root,bg='orange',width=50,height=root.winfo_height())
frame.grid(row=0,column=0)
# Make the buttons with the icons to be shown
home_b = Button(frame,image=home,bg='orange',relief='flat')
set_b = Button(frame,image=settings,bg='orange',relief='flat')
ring_b = Button(frame,image=ring,bg='orange',relief='flat')
# Put them on the frame
home_b.grid(row=0,column=0,pady=10)
set_b.grid(row=1,column=0,pady=50)
ring_b.grid(row=2,column=0)
# Bind to the frame, if entered or left
frame.bind('<Enter>',lambda e: expand())
frame.bind('<Leave>',lambda e: contract())
# So that it does not depend on the widgets inside the frame
frame.grid_propagate(False)
root.mainloop()
我已经使用 cmets 解释了代码,以便随时随地理解。图标取自Flat Icons。可以看出,它有其自身的缺点,但您可以通过它模仿更接近您所展示的东西。您可以通过创建自定义小部件以在展开时同时保存图标和文本等方式来进一步改善这一点。
输出:
更新图片代码(不含PIL):
home = PhotoImage(file='home.png') # Make sure the image size is comparable to the minimum frame width
settings = PhotoImage(file='settings.png')
ring = PhotoImage(file='ring.png')