# ========================================================= # change background color # ========================================================= # a button cycles through a list of colors # ========================================================= # --------------------------------------------------------- # --- import # --------------------------------------------------------- import sys if sys.version_info.major == 3: from tkinter import * from tkinter.font import * else: from Tkinter import * from tkFont import * # --------------------------------------------------------- # --- global variables # --------------------------------------------------------- buttonFont = ('arial', 20, 'bold') colorIndex = 0 colors = ['red','green','blue','light blue', 'pink','orange'] # --------------------------------------------------------- # functions # --------------------------------------------------------- def chageColor(): global colorIndex colorIndex += 1 if colorIndex >= len(colors): colorIndex = 0 f.configure(bg=colors[colorIndex]) def quit(): sys.exit() # --------------------------------------------------------- # main # --------------------------------------------------------- if __name__ == '__main__': # -- Tk root window root = Tk() root.title('Change Background Color') # -- a frame to chage colors f = Frame(root, height=400, width=400, bg=colors[colorIndex]) f.grid(row=0, column=0) # --- buttons fb = Frame(root) fb.grid(row=1,column=0) b1 = Button(fb, text='change Color', font=buttonFont, command=chageColor) b2 = Button(fb, text='Quit', font=buttonFont, command=quit) b1.grid(row=0, column=0) b2.grid(row=0, column=1) fb.grid(row=1, column=0) root.mainloop()