Python GUI：高级作图tkinter模块的常用函数基本的动画和事件绑定

移动的动画

>>> from tkinter import *
>>> import time
>>> tk = Tk()
>>> canvas = Canvas(tk,width=400,height=500)
>>> canvas.pack()
>>> canvas.create_polygon(10,10,10,60,50,35)
1
>>> for x in range(0,60):
#move 第一个参数是id，后面两个是坐标
canvas.move(1,5,5)
tk.update()
time.sleep(0.5)

>>>

事件绑定

当检测到某些event时做某些动作

def movetriangle(evevt):

canva.move(1,5,0)

from tkinter import *
tk = Tk()
canvas = Canvas(tk,width=400,height=500)
canvas.pack()
canvas.create_polygon(10,10,10,60,50,35)
def movetriangle(event):
canvas.move(1,5,50)
canvas.bind_all('<KeyPress-Return>',movetriangle)

来一个实时的：

from tkinter import *
tk = Tk()
canvas = Canvas(tk,width=400,height=500)
canvas.pack()
canvas.create_polygon(10,10,10,60,50,35)
def movetriangle(event):
if event.keysym == 'Up':
canvas.move(1,0,-3)
elif event.keysym == 'Down':
canvas.move(1,5,50)
elif event.keysym == 'Left':
canvas.move(1,-3,0)
else:
canvas.move(1,3,0)
canvas.bind_all('<KeyPress-Up>',movetriangle)
canvas.bind_all('<KeyPress-Down>',movetriangle)
canvas.bind_all('<KeyPress-Left>',movetriangle)
canvas.bind_all('<KeyPress-Return>',movetriangle)
canvas.bind_all('<KeyPress-Right>',movetriangle)

move 中的id

canvas.create_polygon(10,10,10,60,50,35)

这个指令是返回一个数字，可以把这个数字赋值给一个对象：

triangle= canvas.create_polygon(10,10,10,60,50,35)

canvas.move(triangle,2,2)

itemconfig 配置里面的项目

from tkinter import *
tk = Tk()
canvas = Canvas(tk,width=400,height=500)
canvas.pack()
triangle=canvas.create_polygon(10,10,10,60,50,35)
def movetriangle(event):
if event.keysym == 'Up':
canvas.move(triangle,0,-3)
elif event.keysym == 'Down':
canvas.move(triangle,5,50)
elif event.keysym == 'Left':
canvas.move(triangle,-3,0)
else:
canvas.move(triangle,3,0)
#itemconfig 用法
canvas.itemconfig(triangle,fill = 'red')
canvas.itemconfig(triangle,outline = 'blue')
canvas.bind_all('<KeyPress-Up>',movetriangle)
canvas.bind_all('<KeyPress-Down>',movetriangle)
canvas.bind_all('<KeyPress-Left>',movetriangle)
canvas.bind_all('<KeyPress-Return>',movetriangle)
canvas.bind_all('<KeyPress-Right>',movetriangle)