I create a simple window with tkinter and start it as thread to keep the main program running next to the window. This is a shortened version of it:
import tkinter as tk
import threading
class mainWindow(threading.Thread):
def __init__(self, winWidth=500, winHeight=300):
threading.Thread.__init__(self)
self.winWidth = winWidth
self.winHeight = winHeight
# Save all drawn objects, to move or delete them later
self.bricks = []
self.start() #start thread
def run(self):
# parent object for all windows
self.master = tk.Tk()
self.master.protocol("WM_DELETE_WINDOW", self.callback)
self.show()
def callback(self):
self.master.quit()
# Initialize everything important
def show(self, tileSize=10):
# create main window
self.w = tk.Canvas(
self.master,
width=self.winWidth,
height=self.winHeight,
background="white")
self.w.pack()
# draw brick
color = "gray49"
posX = 200
posY = 100
self.bricks.append(self.w.create_rectangle(posX, posY, posX+20, posY+20, fill=color))
tk.mainloop()
def move_brick(self, x,y):
self.w.move(self.brick, x, y)
mainWindow = mainWindow()
mainWindow.move_brick(100,100)
When I run the shown code the window opens correctly, but when I try to move the rectangle with move_brick(...) I get this error:
AttributeError: 'mainWindow' object has no attribute 'w'
Why can't the object find my Canvas w?
