特金特图像在变换时显示奇怪的撕裂

Question

我正在使用tkinter和PIL来制作一个基本的照片查看器(主要用于学习目的(。我制作了放大、缩小、旋转(左右(和移动(向上、向下、向左向右(的按钮。我正在使用标签来显示图像。放大图像时，必须重新缩放和移动标签以适合图像。我目前的问题是，由于某种原因，在放大或缩小时，我在错误的位置看到了图像的瞬间闪光。以下是它的一些图片：

默认大小的图像示例

从默认值放大

从放大缩小

从默认值缩小

编辑：我想出了格式。这是我的整个脚本：

import tkinter as tk
from tkinter import ttk
from tkinter import filedialog
import PIL
from PIL import Image, ImageTk, ImageChops
import os
class PhotoApp:
def __init__(self):
#Make window
self.mainwindow = tk.Tk()
#Centers Window To Screen
self.screenwidth = self.mainwindow.winfo_screenwidth()
self.screenheight = self.mainwindow.winfo_screenheight()
self.place_width = str(int(self.screenwidth / 2 - 400))
self.place_height = str(int(self.screenheight / 2 - 329))
self.mainwindow.geometry("+" + self.place_width + "+" + self.place_height)
#Initial Window Setup
self.mainwindow.title("Photo Viewer")
self.mainwindow.iconbitmap("unitato.ico")
self.mainwindow.resizable(width=False, height=False)
#Variable Declaration
self.avariable = 1
self.photoindex = 0
self.currentphoto = ""
self.photofactor = 0
self.currentphotopath = ""
self.currentphotoready = ""
self.folderpath = ""
self.lastfolderpath = ""
self.photopath = ""
self.photolist = []
self.listspot = 0
self.cwd = "C:/Users/Aaron/Pictures"
self.rememberme = False
self.displayatx = 0
self.displayaty = 0
self.mouseup = True
self.currentrotation = 0
self.thecolor = self.colorcheck()
self.zoomlevel = 0
#Widget Layout
self.setup()
#Key Bindings
self.mainwindow.bind("<Up>", self.moveup)
#Initiates Main Loop
self.mainwindow.mainloop()
def setup(self):
print("Setup Begin")
b_border = 10
self.frame1 = tk.Frame(self.mainwindow)
self.frame1.pack(side=tk.TOP)
self.frame2 = tk.Frame(self.mainwindow)
self.frame2.pack(side=tk.TOP)
self.leftframe = tk.Frame(self.frame1, height=600, width=100,
bd=5, relief=tk.GROOVE)
self.leftframe.pack(side=tk.LEFT)
self.leftframe.pack_propagate(0)
self.rotaterightbutton = tk.Button(self.leftframe, text="Rotate ->",
font=("Arial", 12), command=self.rotateright)
self.rotaterightbutton.pack(side=tk.TOP, pady=10, fill=tk.X)
self.rotateleftbutton = tk.Button(self.leftframe, text="<- Rotate",
font=("Arial", 12), command=self.rotateleft)
self.rotateleftbutton.pack(side=tk.TOP, pady=10, fill=tk.X)

self.photoframe = tk.Frame(self.frame1, width=600, height=600)
self.photoframe.pack(side=tk.LEFT)
self.photoframe.pack_propagate(0)

self.rightframe = tk.Frame(self.frame1, height=600, width=100,
bd=5, relief=tk.GROOVE)
self.rightframe.pack(side=tk.LEFT)
self.rightframe.pack_propagate(0)
self.wipbutton = tk.Button(self.rightframe, text="WIP",
font=("Arial", 14), command=self.whatwip)
self.wipbutton.pack(side=tk.TOP, pady=10, fill=tk.X)
self.leftbutton = tk.Button(self.rightframe, text="[Left]",
font=("Arial", 14), command=self.moveleft)
self.leftbutton.pack(side=tk.TOP, pady=10, fill=tk.X)
self.rightbutton = tk.Button(self.rightframe, text="[Right]",
font=("Arial", 14), command=self.moveright)
self.rightbutton.pack(side=tk.TOP, pady=10, fill=tk.X)
self.upbutton = tk.Button(self.rightframe, text="[Up]",
font=("Arial", 14))#, command=self.moveup)
self.upbutton.pack(side=tk.TOP, pady=10, fill=tk.X)
self.upbutton.bind("<ButtonPress-1>", self.moveup)
self.downbutton = tk.Button(self.rightframe, text="[Down]",
font=("Arial", 14), command=self.movedown)
self.downbutton.pack(side=tk.TOP, pady=10, fill=tk.X)
self.photodisplay = tk.Label(self.photoframe, text="No Photo To Display",
font=("Arial", 14))
self.photodisplay.place(x=self.zoomsizing_frame()[2],
y=self.zoomsizing_frame()[3],
width=1000, height=1000)
self.bottomframe = tk.Frame(self.frame2, width=600, height=100, bd=5,
relief=tk.GROOVE)
self.bottomframe.pack(side=tk.TOP)
self.photoframe.pack_propagate(0)

self.previousbutton = tk.Button(self.bottomframe, text="Previous",
font=("Arial", 14), width=10,
command=self.previous)
self.previousbutton.pack(side=tk.LEFT, anchor=tk.W,
padx=b_border)

self.zoomout = tk.Button(self.bottomframe, text="(-)",
font=("Arial", 18), command=self.zoomout)
self.zoomout.pack(side=tk.LEFT, padx=b_border)

self.folderbutton = tk.Button(self.bottomframe, text="Folder Select",
font=("Arial", 14), width=15, command=self.folderselect)
self.folderbutton.pack(side=tk.LEFT, padx=b_border)

self.zoomin = tk.Button(self.bottomframe, text="(+)",
font=("Arial", 18), command=self.zoomin)
self.zoomin.pack(side=tk.LEFT, padx=b_border)

self.nextbutton = tk.Button(self.bottomframe, text="Next", font=(
"Arial", 14), width=10, command=self.next)
self.nextbutton.pack(side=tk.LEFT, padx=b_border)
print("Setup End")
def colorcheck(self):
color16 = self.mainwindow.winfo_rgb("systembuttonface")
color8List = []
for value in color16:
newvalue = value / 256
newvalue = int(newvalue)
color8List.append(newvalue)
print(value, newvalue, "n", color8List)
rgbtuple = tuple(color8List)
return(rgbtuple)
def zoomsizing_photo(self):
resolution = [600, 600]
if self.zoomlevel == 0:
resolution = [600, 600]
elif self.zoomlevel == 1:
resolution = [1200, 1200]
elif self.zoomlevel == -1:
resolution = [300, 300]
else:
resolution = [600, 600]
return resolution    
def zoomsizing_frame(self):
resandplace = [1000, 1000, -200, -200]
if self.zoomlevel == 0:
resolution = [1000, 1000, -200, -200]
elif self.zoomlevel == 1:
resolution = [2000, 2000, -700, -700]
elif self.zoomlevel == -1:
resolution = [500, 500, 50, 50]
else:
resolution = [1000, 1000, -200, -200]
return resolution
def zoomin(self):
self.zoomlevel = self.zoomlevel + 1
self.reloadphoto()
print(self.zoomlevel)
def zoomout(self):
self.zoomlevel = self.zoomlevel - 1
self.reloadphoto()
print(self.zoomlevel)
def next(self):
print("Next Begin")
self.displayatx = 0
self.displayaty = 0
self.zoomlevel = 0
self.currentrotation = 0
if self.currentphoto != None:
self.currentphoto.close()
self.currentphoto = None
if self.photoindex < len(self.photolist) - 1:
self.photoindex = self.photoindex + 1
else:
self.photoindex = 0
self.reloadphoto()
print("Next End")
def previous(self):
print("Previous Begin")
self.displayatx = 0
self.displayaty = 0
self.zoomlevel = 0
self.currentrotation = 0
if self.currentphoto != None:
self.currentphoto.close()
self.currentphoto = None
if self.photoindex == 0:
self.photoindex = len(self.photolist) - 1
else:
self.photoindex = self.photoindex - 1
self.reloadphoto()
print("Previous End")
def folderselect(self):
print("Folder Select Begin")
self.folderpath = filedialog.askdirectory(parent=self.mainwindow,
initialdir=self.cwd,
title="Choose A Folder To View Photos In.")
if self.folderpath != "":
self.lastfolderpath = self.folderpath
self.rememberme = False
else:
self.lastfolderpath = self.lastfolderpath
self.folderpath = self.lastfolderpath
self.rememberme = True
print(self.folderpath)
if self.folderpath != "" and self.rememberme == False:
print("Mark 1")
self.photolist = []
self.photoindex = 0
self.displayatx = 0
self.displayaty = 0
self.currentphotoready = None
self.cwd = self.folderpath
for name in os.listdir(self.folderpath):
if name.lower().endswith(".jpg") or name.lower().endswith(".png") or name.lower().endswith("tiff") or name.lower().endswith(".gif"):
self.photolist.append(name)
#print(self.photolist)
if self.photolist != []:
self.reloadphoto()
else:
self.photodisplay["image"]=""
self.photodisplay["text"]="No photos in this folder."
print(self.photodisplay["text"], self.photodisplay["image"])
else:
self.folderpath = self.lastfolderpath
if self.photolist != []:
self.reloadphoto()
else:
self.photodisplay["image"]=""
self.photodisplay["text"]="No photos in this folder."
print(self.photodisplay["text"], self.photodisplay["image"])
print("Folder Select End")
def loadphoto(self):
print("Load Photo Begin")
print(self.photoindex)
self.photodisplay["image"]=""
self.currentphotoready = ""
name = self.photolist[self.photoindex]
if name.lower().endswith(".gif"):
self.gifplayback()
else:    
if self.folderpath != "":
self.currentphotopath = self.folderpath + "/" + str(self.photolist[self.photoindex])
self.currentphoto = Image.open(self.currentphotopath)

print("Load Photo End")
def reloadphoto(self):
self.loadphoto()
self.photoscale()
self.photorotate()
self.displayphoto()
def displayphoto(self):
print("Display Photo Begin")
self.photodisplay.place(width=self.zoomsizing_frame()[0], height=self.zoomsizing_frame()[1],
x=self.zoomsizing_frame()[2] + self.displayatx,
y=self.zoomsizing_frame()[3] + self.displayaty)
self.currentphotoready = ImageTk.PhotoImage(self.currentphoto)
self.photodisplay.config(image=self.currentphotoready)
print("Display Photo End")
def photoscale(self):
print("Photo Scale Begin")
print(self.currentphoto.width, self.currentphoto.height)
if self.currentphoto.width > self.currentphoto.height:
self.photofactor = self.currentphoto.width / self.zoomsizing_photo()[0]
else:
self.photofactor = self.currentphoto.height / self.zoomsizing_photo()[1]
#self.currentphoto = self.currentphoto.resize((int(self.currentphoto.width / self.photofactor),
#int(self.currentphoto.height / self.photofactor)), resample=0)
self.currentphoto.thumbnail((int(self.currentphoto.width / self.photofactor),
int(self.currentphoto.height / self.photofactor)), Image.ANTIALIAS)
print(self.currentphoto.width, self.currentphoto.height)
print("Photo Scale End")
def photorotate(self):
self.currentphoto = self.currentphoto.rotate(self.currentrotation, expand=True,
fillcolor=self.thecolor)
def gifplayback(self):
if self.currentphoto != "":
self.currentphoto.close()
self.photodisplay["image"]=""
self.photodisplay["text"]="Gif playback is not yet implemented. n Please come back later.n =)"
def whatwip(self):
if self.currentphoto != "":
self.currentphoto.close()
self.photodisplay["image"]=""
self.photodisplay["text"]=("""Gif playback n n Image rotation n n Slideshow mode n n Image Too Large Error (or ignore)
n Zoom In n n Zoom Out n n Move Image With Mouse
n Hold Down Mouse For Move""")
def moveleft(self):
print("moveleft")
if self.currentphoto != "":
self.displayatx = self.displayatx + 10
self.reloadphoto()
def moveright(self):
print("moveright")
if self.currentphoto != "":
self.displayatx = self.displayatx - 10
self.reloadphoto()
def moveup(self, key):
print("moveup")
if self.currentphoto != "":
self.displayaty = self.displayaty + 10
self.reloadphoto()
def movedown(self):
print("movedown")
if self.currentphoto != "":
self.displayaty = self.displayaty - 10
self.reloadphoto()
def rotateleft(self):
print("Rotate left")
if self.currentphoto != "":
self.currentrotation = self.currentrotation + 10
self.reloadphoto()
def rotateright(self):
print("Rotate right")
if self.currentphoto != "":
self.currentrotation = self.currentrotation - 10
self.reloadphoto()
def main():
program = PhotoApp()
if __name__ == "__main__":
main()

Answer 1

在搞砸了之后，我找到了解决方法。我不是更新标签上的图像并移动标签，而是每次在新位置销毁并重新创建标签。它有效，但它似乎是次优的，尽管它比以前慢一点。