python tkinter：只顯示圖像的一部分

Question

這隻顯示圖像的右下角。我究竟做錯了什麼？

from Tkinter import * 
from PIL import Image, ImageTk 

class Application(Frame): 
    def __init__(self, titl, master=None): 
     Frame.__init__(self, master) 
     self.grid() 

     self.create_widgets() 
     self.master.title(titl) 

    def create_widgets(self): 

     image_file = 'sample.jpg' 
     image1 = ImageTk.PhotoImage(Image.open(image_file)) 
     w = image1.width() 
     h = image1.height() 
     self.canvas = Canvas(self, width=w+5, height=h+5) 
     self.canvas.grid(row=0, column=0) 
     self.canvas.create_image(0,0, image=image1) 
     self.canvas.image = image1 

app = Application('Image') 

app.mainloop() 

Answer 1

你必須錨設置爲NW（西北），因爲它的價值是CENTER默認情況下，它顧名思義中心在給定的座標圖像：

self.canvas.create_image(0,0, image=image1, anchor=NW) 

或者你也可以改變以後如果保持圖片ID：

self.idImage = self.canvas.create_image(0,0, image=image1) 
... 
self.canvas.itemconfig(self.idImage, anchor=NW) 

http://effbot.org/tkinterbook/canvas.htm#Tkinter.Canvas.create_image-method