python学习--交互式图形编程实例一

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#温度转换

from graphics import *
 
win = GraphWin("摄氏温度转换器", 400, 300)
win.setCoords(0.0, 0.0, 3.0, 4.0)
# 绘制接口
Text(Point(1,3), " 摄氏温度:").draw(win)
Text(Point(1,1), " 华氏温度:").draw(win)
input = Entry(Point(2,3), 5)
input.setText("0.0")
input.draw(win)
output = Text(Point(2,1),"")
output.draw(win)
button = Text(Point(1.5,2.0),"转换")
button.draw(win)
Rectangle(Point(1,1.5), Point(2,2.5)).draw(win)
# 等待鼠标点击
win.getMouse()
# 转换输入
celsius = eval(input.getText())
fahrenheit = 9.0/5.0 * celsius + 32.0
# 显示输出，改变按钮
output.setText(fahrenheit)
button.setText("退出")
# 等待响应鼠标点击，退出程序
win.getMouse()
win.close()

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#方块移动

from tkinter import *
 
def main():   
    tk = Tk()
    canvas = Canvas(tk, width = 400, height = 400)
    canvas.pack()
 
    def moverectangle(event):
        if event.keysym == "Up":
            canvas.move(1,0,-5)
        elif event.keysym == "Down":
            canvas.move(1,0,5)
        elif event.keysym == "Left":
            canvas.move(1,-5,0)
        elif event.keysym == "Right":
            canvas.move(1,5,0)
         
    canvas.create_rectangle(180,180,220,220,fill="red")
    canvas.bind_all("<KeyPress-Up>",moverectangle)
    canvas.bind_all("<KeyPress-Down>",moverectangle)
    canvas.bind_all("<KeyPress-Left>",moverectangle)
    canvas.bind_all("<KeyPress-Right>",moverectangle)
    tk.mainloop()
 
if __name__ == '__main__':
    main()

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from graphics import *

 
def convert(input):
    celsius = eval(input.getText())    # 输入转换
    fahrenheit = 9.0/5.0 * celsius + 32
    return fahrenheit 
def colorChange(win,input):
    cnum = eval(input.getText())
    weight = cnum / 100.0
    newcolor = color_rgb(int(255*weight),int(66+150*(1-weight)),int(255*(1-weight)))
    win.setBackground(newcolor)
def main():
    win = GraphWin("摄氏温度转换", 400, 300)
    win.setCoords(0.0, 0.0, 3.0, 4.0)
    # 绘制输入接口
    Text(Point(1,3),
         " 摄氏温度:").draw(win)
    Text(Point(2,2.7),
         " (请输入： 0.0-100.0 )").draw(win)
    Text(Point(1,1),
         "华氏温度:").draw(win)
    input = Entry(Point(2,3), 5)
    input.setText("0.0")
    input.draw(win)
    output = Text(Point(2,1),"")
    output.draw(win)
    button = Text(Point(1.5,2.0),"转换")
    button.draw(win)
    rect = Rectangle(Point(1,1.5), Point(2,2.5))
    rect.draw(win)
    # 等待鼠标点击
    win.getMouse()
    result = convert(input)    # 转换输入
    output.setText(result)    # 显示输出 
    # 改变颜色
    colorChange(win,input)
    # 改变按钮字体
    button.setText("退出")
    # 等待点击事件，退出程序
    win.getMouse()
    win.close()
 
if __name__ == '__main__':
    main()