給控件綁定事件洒疚，當(dāng)發(fā)生該事件時(shí)羡蛾，調(diào)用函數(shù)

widget.bind('<event>', function)

Event事件

語(yǔ)法格式

<modifier-modifier-type-detail>

modifier修飾符

type事件類(lèi)型

實(shí)例

import tkinter as tk
import tkinter.messagebox


class App(tk.Tk):

    def __init__(self):
        super().__init__()
        self.geometry('600x400')
        self.set_widget()
        self.bind_event()
        self.mainloop()
    
    def set_widget(self):
        self.frm = tk.Frame(self)
        self.frm.pack()

        tk.Label(self.frm,text='賬號(hào)').grid(row=0,column=0)
        tk.Label(self.frm,text='密碼').grid(row=1,column=0,pady=10)

        self.tip = tk.StringVar()
        self.tip.set('請(qǐng)輸入郵箱或者手機(jī)號(hào)')

        self.ety_name = tk.Entry(self.frm,textvariable=self.tip,fg='gray')
        self.ety_name.grid(row=0,column=1,columnspan=3)

        self.ety_pwd = tk.Entry(self.frm)
        self.ety_pwd.grid(row=1,column=1,columnspan=3)

        self.btn_yes = tk.Button(self.frm,text='確定(y)',width=8,command=self.show,underline=3)
        self.btn_yes.grid(row=2,column=3)

        self.btn_cancel = tk.Button(self.frm,text='取消(d)',width=8,underline=3,command=self.show2)
        self.btn_cancel.grid(row=2,column=1)


        

    def bind_event(self):
        self.ety_name.bind('<FocusIn>',self.delete_tip)

        self.ety_name.bind('<FocusOut>',self.add_tip)

        self.ety_pwd.bind('<Return>',self.__show)   # 當(dāng)在密碼輸入框輸入完，按回車(chē)鍵就可以捉偏，觸發(fā)函數(shù)倒得。點(diǎn)擊了確定按鈕

        # 設(shè)置快捷鍵

        self.bind('<Control-y>',self.__show)

        self.bind('<Control-d>',self.__show2)
    

    def add_tip(self,evnet):
        
        ety_name = self.ety_name.get()

        if ety_name == '':
            self.tip.set('請(qǐng)輸入郵箱或者手機(jī)號(hào)')
            self.ety_name.config(fg='gray')
            tkinter.messagebox.showerror(message='賬號(hào)不能為空')


    def delete_tip(self,event):
        ety_name = self.ety_name.get()

        if ety_name == '請(qǐng)輸入郵箱或者手機(jī)號(hào)':
            self.ety_name.delete(0,'end')
            self.ety_name.config(fg='black')
    
    def show(self):
        name = self.ety_name.get()
        tkinter.messagebox.showinfo(message=f'welecom {name}')

    def __show(self,event):
        self.show()

    def show2(self):
        tkinter.messagebox.showinfo(message='you press cancel')
    def __show2(self,event):
        self.show2()

App()

Event事件對(duì)象

當(dāng)事件觸發(fā)后，Tkinter 會(huì)自動(dòng)將事件對(duì)象交給回調(diào)函數(shù)進(jìn)行下步的處理夭禽，Event 對(duì)象包含了以下常用屬性：

type對(duì)應(yīng)的數(shù)字

    KeyPress = '2'
    Key = KeyPress,
    KeyRelease = '3'
    ButtonPress = '4'
    Button = ButtonPress,
    ButtonRelease = '5'
    Motion = '6'
    Enter = '7'
    Leave = '8'
    FocusIn = '9'
    FocusOut = '10'
    Keymap = '11'           # undocumented
    Expose = '12'
    GraphicsExpose = '13'   # undocumented
    NoExpose = '14'         # undocumented
    Visibility = '15'
    Create = '16'
    Destroy = '17'
    Unmap = '18'
    Map = '19'
    MapRequest = '20'
    Reparent = '21'
    Configure = '22'
    ConfigureRequest = '23'
    Gravity = '24'
    ResizeRequest = '25'
    Circulate = '26'
    CirculateRequest = '27'
    Property = '28'
    SelectionClear = '29'   # undocumented
    SelectionRequest = '30' # undocumented
    Selection = '31'        # undocumented
    Colormap = '32'
    ClientMessage = '33'    # undocumented
    Mapping = '34'          # undocumented
    VirtualEvent = '35',    # undocumented
    Activate = '36',
    Deactivate = '37',
    MouseWheel = '38',

這樣使用上面的type對(duì)應(yīng)數(shù)字，就不用寫(xiě)多個(gè)函數(shù)來(lái)處理事件萝究。