tkinter 07 Canvas 画布

•  

  运行结果：https://s1.ax1x.com/2018/04/16/Ce7JOK.gif

• # coding=gbk
  # 图片地址：https://morvanzhou.github.io/static/results/tkinter/ins.gif
  # 运行结果：https://s1.ax1x.com/2018/04/16/Ce7JOK.gif
  import tkinter as tk
  
  window = tk.Tk()
  window.title('my window')
  window.geometry('200x200')
  
  canvas = tk.Canvas(window, bg='blue', height=100, width=200)#canvas画布
  image_file = tk.PhotoImage(file='ins.gif')
  image = canvas.create_image(10, 10, # 设定图片放置的位置
                              anchor='nw',# 把图片的左上角作为锚定点（理解为坐标原点）
                              image=image_file)
  x0, y0, x1, y1= 50, 50, 80, 80
  line = canvas.create_line(x0, y0, x1, y1)# 绘制直线
  oval = canvas.create_oval(x0, y0, x1, y1, fill='red')# 绘制圆
  # 参数start=0和extent=180，其实就是从0度到180度，就好像扇子的边打开一样。在我们看来就是个半圆，
  # 如果改为extent=90，我们看到的就是一个1/4圆
  arc = canvas.create_arc(x0+30, y0+30, x1+30, y1+30, start=0, extent=180)#绘制弧
  rect = canvas.create_rectangle(100, 30, 100+20, 30+20)# 绘制方框
  canvas.pack()
  
  # 横坐标移动0个单位，纵坐标移动2个单位
  # 注意：左上角为坐标原点
  def moveit():
      canvas.move(rect, 0, 2)
  
  b = tk.Button(window, text='move', command=moveit).pack()
  
  
  window.mainloop()