Tkinter 极简例子——Event篇

Tkinter Event

鼠标点击事件

from tkinter import *


def printcoords(event):
    print(event.x, event.y)


root = Tk()

bt1 = Button(root, text='leftmost button')
bt1.bind('<Button-1>', printcoords)

bt2 = Button(root, text='middle button')
bt2.bind('<Button-2>', printcoords)

bt3 = Button(root, text='rightmost button')
bt3.bind('<Button-3>', printcoords)

bt4 = Button(root, text='double click')
bt4.bind('<Button-4>', printcoords)

bt5 = Button(root, text='triple click')
bt5.bind('<Button-5>', printcoords)

bt1.pack()
bt2.pack()
bt3.pack()
bt4.pack()
bt5.pack()

root.mainloop()
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鼠标移动事件

from tkinter import *


def printcoords(event):
    print(event.x, event.y)


root = Tk()

bt1 = Button(root, text='leftmost button')
bt1.bind('<B1-Motion>', printcoords)

bt2 = Button(root, text='middle button')
bt2.bind('<B2-Motion>', printcoords)

bt3 = Button(root, text='rightmost button')
bt3.bind('<B3-Motion>', printcoords)

bt1.pack()
bt2.pack()
bt3.pack()

root.mainloop()
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鼠标释放事件

from tkinter import *


def printcoords(event):
    print(event.x, event.y)


root = Tk()

bt1 = Button(root, text='leftmost button')
bt1.bind('<ButtonRelease-1>', printcoords)

bt2 = Button(root, text='middle button')
bt2.bind('<ButtonRelease-2>', printcoords)

bt3 = Button(root, text='rightmost button')
bt3.bind('<ButtonRelease-3>', printcoords)

bt1.pack()
bt2.pack()
bt3.pack()

root.mainloop()
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鼠标进入事件

from tkinter import *


def printcoords(event):
    print(event.x, event.y)


root = Tk()

bt1 = Button(root, text='leftmost button')
bt1.bind('<Enter>', printcoords)

bt1.pack()

root.mainloop()
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鼠标离开事件

from tkinter import *


def printcoords(event):
    print(event.x, event.y)


root = Tk()

bt1 = Button(root, text='leftmost button')
bt1.bind('<Leave>', printcoords)

bt1.pack()

root.mainloop()
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响应特殊键

from tkinter import *


def printcoords(event):
    print('event.char =', event.char)
    print('event.keycode=', event.keycode)


root = Tk()

bt1 = Button(root, text='press backspace')
bt1.bind('<BackSpace>', printcoords)

bt2 = Button(root, text='press enter')
bt2.bind('<Return>', printcoords)

bt3 = Button(root, text='F5')
bt3.bind('<F5>', printcoords)

bt1.pack()
bt2.pack()
bt3.pack()

root.mainloop()
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响应所有按键

from tkinter import *


def printcoords(event):
    print('event.char =', event.char)
    print('event.keycode=', event.keycode)


root = Tk()

bt1 = Button(root, text='press backspace')
bt1.bind('<Key>', printcoords)

bt1.pack()

root.mainloop()
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响应组合键

from tkinter import *


def printcoords(event):
    print('event.char =', event.char)
    print('event.keycode=', event.keycode)


root = Tk()

bt1 = Button(root, text='press shift-up')
bt1.bind('<Shift-Up>', printcoords)
bt2 = Button(root, text='press Control-Alt-a')
bt2.bind('<Control-Alt-a>', printcoords)

bt1.pack()
bt2.pack()

root.mainloop()
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改变组件大小事件

from tkinter import *


def printsize(event):
    print(event.width, event.height)


root = Tk()

root.bind('<Configure>', printsize)

root.mainloop()
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两个事件绑定同一个控件

from tkinter import *


def printevent(event):
    print('<Key>', event.keycode)


def printreturn(event):
    print('<Return', event.keycode)


root = Tk()

root.bind('<Key>', printevent)
root.bind('<Return>', printreturn)

root.mainloop()
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为一个实例绑定一个事件

from tkinter import *


def printevent(event):
    print('<Key>', event.keycode)


root = Tk()

bt1 = Button(root, text='instance event')
bt1.bind('<Key>', printevent)
bt1.focus_set()
bt1.pack()

root.mainloop()
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事件各个级别间传递

from tkinter import *


def printevent(event):
    print('<Key>', event.keycode)


def printToplevel(event):
    print('<toplevel>', event.keycode)


def printClass(event):
    print('<bind_class>', event.keycode)


def printAppAll(event):
    print('<bind_all>', event.keycode)


root = Tk()

bt1 = Button(root, text='instance event')
bt1.bind('<Key>', printevent)

bt1.winfo_toplevel().bind('<Return>', printToplevel)

root.bind_class('Button', '<Return>', printClass)

bt1.bind_all('<Return>', printAppAll)
bt1.focus_set()
bt1.pack()

root.mainloop()
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bind_class

from tkinter import *


def printClass(event):
    print('<bind_class>', event.keycode)


root = Tk()

root.bind_class('Button', '<Return>', printClass)

bt1 = Button(root, text='a button')
bt2 = Button(root, text='another button')

bt1.focus_set()
bt1.pack()
bt2.pack()

root.mainloop()
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使用protocol绑定

from tkinter import *


def printprotocol():
    print('WM_DELETE_WINDOW')
    root.destroy()


root = Tk()

root.protocol('WM_DELETE_WINDOW', printprotocol)

root.mainloop()
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