Python PIL Изображение в автоматическом изменении метки

Я пытаюсь сделать виджет для хранения изображения, которое будет автоматически изменяться в соответствии с его контейнером, например. если он упакован непосредственно в окно, то расширение этого окна расширит изображение.

У меня есть некоторый код, который является полуфункциональным, но мне пришлось добавить пару констант в одну из подпрограмм, чтобы предотвратить автоматическое изменение размера автозапуска (заставляя его продолжать расти в размере)

Я уверен, что причина этого связана с внутренними дополнениями/границами виджетов, но даже пытаясь принять это во внимание, я получаю эту проблему.

Я использую python 3.3.2 и PIL 1.1.7 на 64-битной Windows 7 мой код следующий:

from tkinter import tix
from PIL import Image, ImageTk

def Resize_Image(image, maxsize):
    r1 = image.size[0]/maxsize[0] # width ratio
    r2 = image.size[1]/maxsize[1] # height ratio
    ratio = max(r1, r2)
    newsize = (int(image.size[0]/ratio), int(image.size[1]/ratio)) # keep image aspect ratio
    image = image.resize(newsize, Image.ANTIALIAS)
    return image

class Pict_Frame(tix.Label):
    def __init__(self, parent=None, picture=None, maxupdate=None, **kwargs):
        tix.Label.__init__(self, parent, **kwargs)
        self.bind("<Configure>", self._resize_binding)
        self.maxupdate = maxupdate
        self.update_after_id = None
        self.photo = None
        self.image = None
        if picture:
            self.set_picture(picture)

    def _resize_binding(self, event):
        if self.photo:
            if not self.maxupdate:
                self.load_picture()
            else:
                if not self.update_after_id:
                    self.update_after_id = self.after(int(1000/self.maxupdate), self.load_picture)

    def load_picture(self):
        if self.photo:
            if self.update_after_id:
                self.update_after_id = None
            if (self.winfo_width() > 1) and (self.winfo_height() > 1): # prevent updates before widget gets sized
                self.image = ImageTk.PhotoImage(Resize_Image(self.photo, (
                             self.winfo_width()-int(self.cget("bd"))-1, self.winfo_height()-int(self.cget("bd"))-1))) 
                # here is where I added the constants ^^^
                # but even using cget to get the border size I have had to add to this
                # to prevent the resize loop, and when using other widget styles
                #(raised etc) this problem persists

                self.configure(image=self.image)

    def set_picture(self, filename):
        with open(filename, mode="rb") as file:
            self.photo = Image.open(file)
            self.photo.load() # load image into memory to allow resizing later without file access
        self.load_picture()

if __name__ == "__main__":
    test = Pict_Frame(bg="grey", bd=2, relief="raised",
                      maxupdate=2, # allows problem to be easily seen
                      picture="image.jpg")
    test.pack(fill="both", expand=True)
    test.master.mainloop()

когда я применяю другие стили, такие как более толстая граница (10 пикселей), возникает эта проблема изменения размера, показывающая, что константы действительно не решают проблему.
так есть ли какой-либо метод, чтобы получить только пространство внутри виджета, а не его запрошенный размер?

from tkinter import tix from PIL import Image, ImageTk def Resize_Image(image, maxsize): r1 = image.size[0]/maxsize[0] # width ratio r2 = image.size[1]/maxsize[1] # height ratio ratio = max(r1, r2) newsize = (int(image.size[0]/ratio), int(image.size[1]/ratio)) # keep image aspect ratio image = image.resize(newsize, Image.ANTIALIAS) return image class Pict_Frame(tix.Label): def __init__(self, parent=None, picture=None, maxupdate=None, imagesize=None, **kwargs): tix.Label.__init__(self, parent, **kwargs) self.bind("<Configure>", self._resize_binding) self.maxupdate = maxupdate self.imagesize = imagesize self.update_after_id = None # used for update rate limiting self.photo = None # used to store raw image from file for later use self.image = None # used for reference to the resized image if imagesize: self.photo=Image.new("RGB", (1,1)) # create empty image to insert self.image=ImageTk.PhotoImage(self.photo) # create instance of image for PIL self.configure(image=self.image) self.configure(width=imagesize[0], height=imagesize[1]) # not label uses pixels for size, set size passed in if picture: self.set_picture(picture) # we have a picture so load it now def _resize_binding(self, event): if self.photo: # we have a picture if not self.maxupdate: # no rate limiting self.load_picture() else: if not self.update_after_id: # if we're not waiting then queue resize self.update_after_id = self.after(int(1000/self.maxupdate), self.load_picture) def load_picture(self): if self.photo: if self.update_after_id: self.update_after_id = None if (self.winfo_width() > 1) and (self.winfo_height() > 1): # prevent updates before widget gets sized bd = self.cget("bd") # get the border width if type(bd) != int: # if there was no border set we get an object back pad = 4 # set this explicitly to avoid problems else: pad = int(bd*2) # we have a border both sides, so double the retrieved value newsize = (self.winfo_width()-pad, self.winfo_height()-pad) elif self.imagesize: # only use the passed in image size if the widget has not rendered newsize = self.imagesize else: return # widget not rendered yet and no size explicitly set, so break until rendered self.image = ImageTk.PhotoImage(Resize_Image(self.photo, newsize)) self.configure(image=self.image) def set_picture(self, filename): with open(filename, mode="rb") as file: self.photo = Image.open(file) self.photo.load() # load image into memory to allow resizing later without file access self.load_picture()

import os path = "E:\imagefolder" images = [] ind = 0 for item in os.listdir(path): # get a fully qualified list of images if os.path.isdir(os.path.join(path, item)): if os.path.isfile(os.path.join(path, item, "thumb.jpg")): images.append(os.path.join(path, item, "thumb.jpg")) def callback(): global ind ind += 1 if ind >= len(images): ind = 0 pict.set_picture(images[ind]) ignore_test_cases = [] if 1 not in ignore_test_cases: print("test case 1: - no border no set size") root = tix.Tk() tix.Button(root, text="Next Image", command=callback).pack() pict = Pict_Frame(parent=root, bg="grey", maxupdate=2, # allows problem to be easily seen picture=images[ind]) pict.pack(fill="both", expand=True) tix.Button(root, text="Next Image", command=callback).pack() root.mainloop() if 2 not in ignore_test_cases: print("test case 2: - small border no set size") root = tix.Tk() tix.Button(root, text="Next Image", command=callback).pack() pict = Pict_Frame(parent=root, bg="grey", bd=2, relief="raised", maxupdate=2, picture=images[ind]) pict.pack(fill="both", expand=True) tix.Button(root, text="Next Image", command=callback).pack() root.mainloop() if 3 not in ignore_test_cases: print("test case 3: - large border no set size") root = tix.Tk() tix.Button(root, text="Next Image", command=callback).pack() pict = Pict_Frame(parent=root, bg="grey", bd=10, relief="raised", maxupdate=2, picture=images[ind]) pict.pack(fill="both", expand=True) tix.Button(root, text="Next Image", command=callback).pack() root.mainloop() if 4 not in ignore_test_cases: print("test case 4: - no border with set size") root = tix.Tk() tix.Button(root, text="Next Image", command=callback).pack() pict = Pict_Frame(parent=root, bg="grey", maxupdate=2, imagesize=(256,384), picture=images[ind]) pict.pack(fill="both", expand=True) tix.Button(root, text="Next Image", command=callback).pack() root.mainloop() if 5 not in ignore_test_cases: print("test case 5: - small border with set size") root = tix.Tk() tix.Button(root, text="Next Image", command=callback).pack() pict = Pict_Frame(parent=root, bg="grey", bd=2, relief="raised", maxupdate=2, imagesize=(256,384), picture=images[ind]) pict.pack(fill="both", expand=True) tix.Button(root, text="Next Image", command=callback).pack() root.mainloop() if 6 not in ignore_test_cases: print("test case 6: - large border with set size") root = tix.Tk() tix.Button(root, text="Next Image", command=callback).pack() pict = Pict_Frame(parent=root, bg="grey", bd=10, relief="raised", maxupdate=2, imagesize=(256,384), picture=images[ind]) pict.pack(fill="both", expand=True) tix.Button(root, text="Next Image", command=callback).pack() root.mainloop() if 10 not in ignore_test_cases: print("test case fullscreen: - small border no set size, in fullscreen window with expansion set up") root = tix.Tk() root.state("zoomed") root.grid_columnconfigure(1, weight=2) root.grid_columnconfigure(2, weight=1) root.grid_rowconfigure(2, weight=1) tix.Button(root, text="Next Image", command=callback).grid(column=2, row=1, sticky="nesw") pict = Pict_Frame(parent=root, bg="grey",# bd=10, relief="raised", maxupdate=2, picture=images[ind]) pict.grid(column=2, row=2, sticky="nesw") tix.Button(root, text="Next Image", command=callback).grid(column=2, row=3, sticky="nesw") root.mainloop() if 11 not in ignore_test_cases: print("test case fullscreen: - small border no set size, in fullscreen window with expansion set up") root = tix.Tk() root.state("zoomed") root.grid_columnconfigure(1, weight=2) root.grid_columnconfigure(2, weight=1) root.grid_rowconfigure(1, weight=1) frame = tix.Frame(root) frame.grid(column=2, row=1, sticky="nesw") frame.grid_columnconfigure(1, weight=1) frame.grid_rowconfigure(2, weight=1) tix.Button(frame, text="Next Image", command=callback).grid(column=1, row=1, sticky="nesw") pict = Pict_Frame(parent=frame, bg="grey",# bd=10, relief="raised", maxupdate=2, picture=images[ind]) pict.grid(column=1, row=2, sticky="nesw") tix.Button(frame, text="Next Image", command=callback).grid(column=1, row=3, sticky="nesw") root.mainloop()

Ответ 1