在tkinter中使用图像旋转标签

Question

I am attempting to rotate an label with an image which is on a canvas with tkinter.

I have three images that need rotating (pitch, roll and yaw) and they will eventually rotate according to IMU sensor outputs.

import tkinter as tk
from tkinter import PhotoImage
from PIL import Image

root = tk.Tk()
root.title('Pitch/Roll/Yaw Simulator')

# pick image file
fname = "PRY_Diag_Dials.png"
bg_image = tk.PhotoImage(file=fname)

# get the width and height of the image
w = bg_image.width()
h = bg_image.height()

# size the window so the image will fill it
root.geometry("%dx%d+50+30" % (w, h))
cv = tk.Canvas(root, width=w, height=h)
cv.pack(side='top', fill='both', expand='yes')
cv.create_image(0, 0, image=bg_image, anchor='nw')


#add images

pitch = tk.PhotoImage(file="Pitch2.gif")
pitch_lbl = tk.Label(cv, image=pitch,bg="white")
pitch_lbl.image = pitch
pitch_lbl.place(x=60, y=180)

roll = tk.PhotoImage(file="Roll2.gif")
roll_lbl = tk.Label(cv, image=roll,bg="white")
roll_lbl.image = roll
roll_lbl.place(x=325, y=180)

yaw = tk.PhotoImage(file="Yaw2.gif")
yaw_lbl = tk.Label(cv, image=yaw,bg="white")
yaw_lbl.image = yaw
yaw_lbl.place(x=590, y=180)

root.mainloop()

How can I rotate the image labels through tkinter?

Answer 1

If you are looking to simple rotate 90, 180 or flip then you can use PIL to transpose .

See this link for the details: Transpose .

Here is the important bits just in case link brakes in the future:

Image.transpose(method) Transpose image (flip or rotate in 90 degree steps)

Parameters: method – One of:

• PIL.Image.FLIP_LEFT_RIGHT
• PIL.Image.FLIP_TOP_BOTTOM
• PIL.Image.ROTATE_90
• PIL.Image.ROTATE_180
• PIL.Image.ROTATE_270
• PIL.Image.TRANSPOSE

Returns: Returns a flipped or rotated copy of this image.

Answer 2

tkinter doesn't have any support for rotating canvas items.

From the official tcl/tk documentation (tkinter is a wrapper around a tcl interpreter):

Individual items may be moved or scaled using widget commands described below, but they may not be rotated.