python tkinter如何将键绑定到按钮

Question

编程新手,特别是python和tKinter.如何创建将键"s"绑定到按钮或功能的方法sharpen？任何帮助都是极好的.

from Tkinter import *
from PIL import Image, ImageTk, ImageFilter, ImageEnhance

class Application(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)
        master.wm_title("Image examples")
        self.pack()
        self.createWidgets()

def createWidgets(self):
    self.img = Image.open("lineage.jpg")
    self.photo1 = ImageTk.PhotoImage(self.img.convert("RGB"))
    self.label1 = Label(self, image=self.photo1)
    self.label1.grid(row=0, column=0, padx=5, pady=5, rowspan=10)

    self.photo2 = ImageTk.PhotoImage(self.img.convert("RGB"))
    self.label2 = Label(self, image=self.photo2)
    self.label2.grid(row=0, column=1, padx=5, pady=5, rowspan=10)

    button5 = Button(self, text="Sharpen", command=self.sharpen)
    button5.grid(row=4, column= 2, sticky = N)

def sharpen(self):
    img2 = self.img.filter(ImageFilter.SHARPEN)
    self.photo2 = ImageTk.PhotoImage(img2)
    self.label2 = Label(self, image=self.photo2)
    self.label2.grid(row=0, column=1, padx=5, pady=5, rowspan=10)

Answer 1

您需要进行两项更改:

1. 加

   master.bind('s', self.sharpen)
   

   到__init__.(绑定到框架,self似乎不起作用.)

2. 当s按下时,self.sharpen(event)会被调用.由于Tkinter将发送一个Tkinter.Event对象,我们还必须将呼叫签名更改为

   def sharpen(self, event=None):
   

   因此,当按下按钮时,event将被设置为默认值None,但是当s按下该键时,event 将被分配给该Tkinter.Event对象.