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Recipe 578874 revision 1 

import Tkinter as tk

class simultaneousScrollbar(tk.Scrollbar):
	def __init__(self, master, **kwargs):
		self.__scrollableWidgets = []

		self.orientLabel = 'y'

		if 'orient' in kwargs:
			if kwargs['orient']== tk.VERTICAL:
				self.orientLabel = 'y'
			elif kwargs['orient']== tk.HORIZONTAL:
				self.orientLabel = 'x'
			else:
				raise Exception("Bad 'orient' argument in scrollbar.")

		kwargs['command'] = command=self.onScroll

		tk.Scrollbar.__init__(self, master, **kwargs)


		self.scrollbarClicked = False
		self.mouseOver = False

		self.bind_all("<1>", self.onClickOnWindow)
		
		self.bind_all("<MouseWheel>", self.onMouseWheel)

		self.bind("<4>", self.onMouseWheel)
		self.bind("<5>", self.onMouseWheel)
		self.bind("<Enter>", self.onMouseOver)
		self.bind("<Leave>", self.onMouseOut)

	def add_ScrollableZones(self, *scrollableWidgets):
		for widget in scrollableWidgets:
			self.__scrollableWidgets.append(widget)
			widget[self.orientLabel+'scrollcommand']=self.set
			widget.bind("<MouseWheel>", self.onMouseWheel)

	def onScroll(self, *args):
		for widget in self.__scrollableWidgets:
			getattr(widget, self.orientLabel+'view')(*args)

	def onClickOnWindow(self,event):
		if self.winfo_containing(event.x_root, event.y_root) ==  self:
			self.scrollbarClicked = True
		else:
			self.scrollbarClicked = False

	def onMouseOver(self,event):
		self.mouseOver = True

	def onMouseOut(self,event):
		self.mouseOver = False

	def onMouseWheel(self, event):
		if self.scrollbarClicked:
			mouseWheel = True
		else:
			if self.mouseOver:
				mouseWheel = True
			else:
				mouseWheel = False

		if mouseWheel:
			for widget in self.__scrollableWidgets:
				getattr(widget, self.orientLabel+'view')("scroll", (-1)*event.delta/120,"units")



def test():
	root = tk.Tk()

	scrollbar = simultaneousScrollbar(root, orient=tk.HORIZONTAL)
	scrollbar.pack(side=tk.TOP, fill=tk.X)

	emptySpace = tk.Frame(root, height=18)
	emptySpace.pack()

	tk.Label(root, text='First scrolled frame:').pack(anchor=tk.W)
	canvas1 = tk.Canvas(root, width=300, height=100)
	canvas1.pack(anchor=tk.NW)

	frame1= tk.Frame(canvas1)
	frame1.pack()

	for i in range(20):
		tk.Label(frame1, text="Label "+str(i)).pack(side=tk.LEFT)

	canvas1.create_window(0, 0, window=frame1, anchor='nw')

	canvas1.update_idletasks()

	canvas1['scrollregion'] = (0,0,frame1.winfo_reqwidth(), frame1.winfo_reqheight())

	tk.Label(root, text='Second scrolled frame:').pack(anchor=tk.W)
	canvas2 = tk.Canvas(root,width=300, height=100)
	canvas2.pack(anchor=tk.NW)

	frame2= tk.Frame(canvas2)
	frame2.pack()

	for i in range(20):
		tk.Label(frame2, text="Label "+str(i)).pack(side=tk.LEFT)

	canvas2.create_window(0, 0, window=frame2, anchor='nw')

	canvas2.update_idletasks()
	canvas2['scrollregion'] = (0,0,frame2.winfo_reqwidth(), frame2.winfo_reqheight())

	scrollbar.add_ScrollableZones(canvas1,canvas2)

	root.mainloop()

if __name__== '__main__':
	test()

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