tkinter 图片缩放的迂回

背景:

        win8.1, python 3.9.7, 自带IDLE

目的:

        在canvas中显示完整图片

方法:

        总体来说，迂回法，暂未找到tkinter 的 PhotoImage如何缩放。

        采用PIL 的 Image 和 ImageTk迂回后，再提交给canvas.create_image.

from tkinter import *
from PIL import Image # 安装方法: pip install pillow, 名字与PIL不同.
from PIL import ImageTkclass Application(Frame):def __init__(self, master=None):super().__init__(master)self.master = masterself.pack()self.createWidget()def createWidget(self):self.canvas = Canvas(self, width=300,height=200, bg="green")self.canvas.pack()line = self.canvas.create_line(10,10,30,20,40,50)rect = self.canvas.create_rectangle(50,50,100,100)oval = self.canvas.create_oval(50,50,100,100)global photo#photo = PhotoImage(file="imgs/flowers.gif") # tkinter的,无法缩放img1 = Image.open("imgs/flowers.gif")img1 = img1.resize((200,100)) #原图片3840x2160photo = ImageTk.PhotoImage(image=img1,size=50) #PIL的self.canvas.create_image(200,150,image=photo)#print("size of photo:{0},{1}".format(photo.width(), photo.height()))#把photo换成 img1，就可以看到img1的图片大小if __name__ == "__main__":root = Tk()root.geometry("400x300+200+200")app = Application(master=root)root.mainloop()