我的滚动条不适用于鼠标的滚动条

Question

我已经重复使用了代码。
我正在尝试滚动此框架并且滚动条正在工作但是我希望使用鼠标滚轮来滚动它。我应该怎么办？我希望它只垂直滚动。

from tkinter import *
root = Tk()
root['bg'] = 'wheat'


frame_container=Frame(root, width = 1000)
frame_container['bg'] = 'wheat'
canvas_container=Canvas(frame_container, width = 1000)
canvas_container['bg'] = 'wheat'


frame2=Frame(canvas_container, width = 1000)
frame2['bg'] = 'wheat'

scrollbar_tk = Scrollbar(frame_container, 
orient="vertical",command=canvas_container.yview)#, 
yscrollcommand=scrollbar_tk.set
 # will be visible if the frame2 is to to big for the canvas
canvas_container.create_window((0,0),window=frame2,anchor='nw')


naan = IntVar()
roti=IntVar()
dal=IntVar()
manchurian = IntVar()
makhani=IntVar()
masala_bhindi = IntVar()
chole = IntVar()
rajma = IntVar()
shahi_panneer = IntVar()
kadahi_paneer = IntVar()
masala_gobhi = IntVar()
allo_gobhi = IntVar()
matar_paneer = IntVar()
menu_roti = "Tava Roti             25 ₹/piece"
menu_dal = "Dal                       80 ₹/bowl"
menu_makhani = "Dal Makhni          110 ₹/bowl"
menu_naan = "Naan                    50 ₹/piece"
menu_manchurian = "Manchurian         110 ₹/plate"     
menu_shahi_panneer = "Shahi paneer      110₹/bowl"
menu_kadahi_paneer = "Kadhai paneer     150/bowl"
menu_masala_gobhi = "Masala gobhi      130₹/bowl"
menu_allo_gobhi = "Aloo gobhi          120₹/bowl" 
menu_matar_paneer = "Matar paneer      135₹/bowl"
menu_masala_bhindi = "Masala bhindi     110₹/bowl"
menu_chole = "Chole                 100₹/bowl"  
menu_rajma = "Rajama              150₹/bowl"
menu_chaap = "Chaap                125₹/bowl"
menu_aloo_parntha = "Aloo parantha     35₹/peice" 
menu_cheele = "Cheele                55₹/peice "

listItems = [menu_roti,menu_dal,menu_makhani, menu_naan, 
menu_manchurian, menu_shahi_panneer,
             menu_kadahi_paneer, menu_masala_gobhi, 
menu_allo_gobhi, menu_matar_paneer, menu_masala_bhindi, 
menu_chole, menu_rajma, menu_chaap, menu_aloo_parntha, 
 menu_cheele]


Title = Label(frame2, text = "                Food Items         
Prices         Quantities", fg = 'red', bg = 'wheat', font= 
("arial", 30))
Title.grid()
for item in listItems:
    label = Label(frame2,text=item, fg = 'yellow', bg = 
'wheat', font=("arial", 30))
    label.grid(column=0, row=listItems.index(item)+1)


q_roti = Entry(frame2, font=("arial",20), textvariable = roti, 
fg="Black", width=10)
q_roti.grid(column = 1, row = 1)
q_dal = Entry(frame2, font=("arial",20), textvariable = dal, 
fg="black", width=10)
q_dal.grid(column = 1, row = 2)
q_makhani = Entry(frame2, font=("arial",20), textvariable = 
makhani, fg="black", width=10)
q_makhani.grid(column = 1, row = 3)
q_naan = Entry(frame2, font=("arial",20), textvariable = naan, 
fg="black", width=10)
q_naan.grid(column = 1, row = 4)
q_manchurian = Entry(frame2,font=("arial",20), textvariable = 
manchurian, fg="black", width=10)
q_manchurian.grid(column = 1, row = 5)
q_shahi_panneer = Entry(frame2, font=("arial",20), textvariable 
= shahi_panneer, fg="black", width=10)
q_shahi_panneer.grid(column = 1, row = 6)
q_kadahi_panneer = Entry(frame2, font=("arial",20), 
textvariable = kadahi_paneer, fg="black", width=10)
q_kadahi_panneer.grid(column = 1, row = 7)
q_masala_gobhi = Entry(frame2, font=("arial",20), textvariable 
= masala_gobhi, fg="black", width=10)
q_masala_gobhi.grid(column = 1, row = 8)
q_allo_gobhi = Entry(frame2, font=("arial",20), textvariable = 
allo_gobhi, fg="black", width=10)
q_allo_gobhi.grid(column = 1, row = 9)
q_matar_panneer = Entry(frame2, font=("arial",20), textvariable 
= matar_paneer, fg="black", width=10)
q_matar_panneer.grid(column = 1, row = 10)
q_masala_bhindi = Entry(frame2, font=("arial",20), textvariable 
= masala_bhindi, fg="black", width=10)
q_masala_bhindi.grid(column = 1, row = 11)
q_cholle = Entry(frame2,font=("arial",20), textvariable = 
chole, fg="black", width=10)
q_cholle.grid(column = 1, row = 12)
q_rajma = Entry(frame2,font=("arial",20), textvariable = rajma, 
fg="black", width=10)
q_rajma.grid(column = 1, row = 13)

frame2.update() # update frame2 height so it's no longer 0 ( 
height is 0 when it has just been created )
canvas_container.configure(yscrollcommand=scrollbar_tk.set, 
scrollregion="0 0 0 %s" % frame2.winfo_height()) # the 
scrollregion 
mustbe the size of the frame inside it,
                                                                                                            
#in this case "x=0 y=0 width=0 height=frame2height"
                                                                                                            
#width 0 because we only scroll verticaly so don't mind about 
the width.
canvas_container.grid(column = 1, row = 0)

scrollbar_tk.grid(column = 0, row = 0, sticky='ns')


frame_container.grid()#.pack(expand=True, fill='both')

root.mainloop()

对不起这个代码。这不是很容易理解，但对于我这个级别的人来说可能就足够了。请有人给我一些建议来提高我的技能。

Answer 1

您可以使用 <MouseWheel> 虚拟事件来滚动 canvas 并最终滚动框架。

canvas_container.create_window((0,0),window=frame2,anchor='nw')
def _on_mousewheel(event):
    canvas_container.yview_scroll(-1*int(event.delta/120), "units")   
canvas_container.bind_all("<MouseWheel>", _on_mousewheel)

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