[英]Updating Tkinter Label with an Image
Well I got a "small" problem with updating a label using Tkinter and PIL. 好吧,我在使用Tkinter和PIL更新标签时遇到了一个“小”问题。
As soon as I press the cheese Button it should display foo2, but it just displays a white screen. 当我按下起司按钮时,它应该显示foo2,但它只显示白屏。 Any suggestions? 有什么建议么?
Here is my code: 这是我的代码:
from PIL import Image as Im
from Tkinter import *
class MyWindow():
def __init__(self):
self.root = Tk()
self.maskPng = Im.open("foo.png")
self.maskPng.convert("RGBA")
self.maskPng.save("bar.gif", "GIF")
self.mask = PhotoImage(file = "bar.gif")
self.show = Label(self.root, image = self.mask).pack(side = "left")
self.speedBTN = Button(self.root, text = "cheese", command = self.speed).pack(side = "right")
self.changed = False
def speed(self):
self.speedImg = Im.open('foo2')
self.speedImg = self.speedImg.convert("RGBA")
# overlaying foo and foo2 -- it works I tested it
self.maskPng.paste(self.speedImg, (0,0), self.speedImg)
self.render()
def render(self):
self.mask = PhotoImage(self.speedImg)
self.show.configure(image = self.mask)
self.show.image = self.mask
def draw(self):
self.root.mainloop()
main = MyWindow()
main.root.mainloop()
Well, I think that the reason is self.show
which is None
when you press the button. 好吧,我认为原因是self.show
,当您按下按钮时为None
。 This is because this line: 这是因为此行:
self.show = Label(self.root, image = self.mask).pack(side = "left")
should be: 应该:
self.show = Label(self.root, image = self.mask)
self.show.pack(side = "left")
This happens, because pack
, grid
etc. return None
. 发生这种情况是因为pack
, grid
等返回None
。
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