Recipe 578874 revision 7

Diff to Previous Revision

--- revision 6 2014-06-22 17:03:02
+++ revision 7 2016-11-20 00:29:52
@@ -1,167 +1,140 @@
-# Version: 0.4
 # Author: Miguel Martinez Lopez
 # Uncomment the next line to see my email
 # print "Author's email: ", "61706c69636163696f6e616d656469646140676d61696c2e636f6d".decode("hex")
 
-
-import Tkinter as tk
-import ttk
-
-import platform
-os = platform.system()
+try:
+   import Tkinter as tk
+   import ttk
+except ImportError:
+   import tkinter as tk
+   from tkinter import ttk
 
 
 class MouseWheel(object):
-	def __init__(self, root, factor = 2):
-		global os
-		
-		self.activeArea = None
-		
-		if type(factor) == int:
-			self.factor = factor
-		else:
-			raise Exception("Factor must be an integer.")
+    def __init__(self, root, factor = 0.5):
+        self.activeArea = None
+        self.factor = factor
 
-		if os == "Linux" :
-			root.bind_all('<4>', self.onMouseWheel,  add='+')
-			root.bind_all('<5>', self.onMouseWheel,  add='+')
-		else:
-			# Windows and MacOS
-			root.bind_all("<MouseWheel>", self.onMouseWheel,  add='+')
+        import platform
+        os = platform.system()
 
-	def onMouseWheel(self,event):
-		if self.activeArea:
-			self.activeArea.onMouseWheel(event)
+        if os == "Linux" :
+            root.bind_all('<4>', self.onMouseWheel,  add='+')
+            root.bind_all('<5>', self.onMouseWheel,  add='+')
+        else:
+            # Windows and MacOS
+            root.bind_all("<MouseWheel>", self.onMouseWheel,  add='+')
 
-	def mouseWheel_bind(self, widget):
-		self.activeArea = widget
+    def onMouseWheel(self,event):
+        if self.activeArea:
+            self.activeArea.onMouseWheel(event.delta)
 
-	def mouseWheel_unbind(self):
-		self.activeArea = None
+    def mouseWheel_bind(self, widget):
+        self.activeArea = widget
 
-	@staticmethod
-	def build_function_onMouseWheel(widget, orient, factor = 1):
-		view_command = getattr(widget, orient+'view')
-		if os == 'Linux':
-			def onMouseWheel(event):
-				if event.num == 4:
-					view_command("scroll",(-1)*factor,"units" )
-				elif event.num == 5:
-					view_command("scroll",factor,"units" ) 
-				
-		elif os == 'Windows':
-			def onMouseWheel(event):		
-				view_command("scroll",(-1)*int((event.delta/120)*factor),"units" ) 
-		
-		elif os == 'Darwin':
-			def onMouseWheel(event):		
-				view_command("scroll",event.delta,"units" ) 			
-		
-		return onMouseWheel
-		
+    def mouseWheel_unbind(self):
+        self.activeArea = None
 
-	def add_scrolling(self, scrollingArea, xscrollbar=None, yscrollbar=None):
-		scrollingArea.bind('<Enter>',lambda event: self.mouseWheel_bind(scrollingArea))
-		scrollingArea.bind('<Leave>', lambda event: self.mouseWheel_unbind())
+    def add_scrolling(self, scrollingArea, xscrollbar=None, yscrollbar=None):
+        scrollingArea.bind('<Enter>',lambda event: self.mouseWheel_bind(scrollingArea))
+        scrollingArea.bind('<Leave>', lambda event: self.mouseWheel_unbind())
 
-		if xscrollbar and not hasattr(xscrollbar, 'onMouseWheel'):
-				setattr(xscrollbar, 'onMouseWheel', self.build_function_onMouseWheel(scrollingArea,'x', self.factor) )
+        if xscrollbar and not hasattr(xscrollbar, 'onMouseWheel'):
+            setattr(xscrollbar, 'onMouseWheel', lambda delta: scrollingArea.xview("scroll",(-1)*int(delta/(120*self.factor)),"units" ) )
 
-		if yscrollbar and not hasattr(yscrollbar, 'onMouseWheel'):
-				setattr(yscrollbar, 'onMouseWheel', self.build_function_onMouseWheel(scrollingArea,'y', self.factor) )
+        if yscrollbar and not hasattr(yscrollbar, 'onMouseWheel'):
+            setattr(yscrollbar, 'onMouseWheel', lambda delta: scrollingArea.yview("scroll",(-1)*int(delta/(120*self.factor)),"units" ) )
 
-		active_scrollbar_on_mouse_wheel = yscrollbar or xscrollbar
-		if active_scrollbar_on_mouse_wheel:
-			setattr(scrollingArea, 'onMouseWheel', active_scrollbar_on_mouse_wheel.onMouseWheel)
+        active_scrollbar_on_mouse_wheel = yscrollbar or xscrollbar
+        if active_scrollbar_on_mouse_wheel:
+            setattr(scrollingArea, 'onMouseWheel', active_scrollbar_on_mouse_wheel.onMouseWheel)
 
-		for scrollbar in (xscrollbar, yscrollbar):
-			if scrollbar:
-				scrollbar.bind('<Enter>', lambda event, scrollbar=scrollbar: self.mouseWheel_bind(scrollbar) )
-				scrollbar.bind('<Leave>', lambda event: self.mouseWheel_unbind())
+        for scrollbar in (xscrollbar, yscrollbar):
+            if scrollbar:
+                scrollbar.bind('<Enter>', lambda event, scrollbar=scrollbar: self.mouseWheel_bind(scrollbar) )
+                scrollbar.bind('<Leave>', lambda event: self.mouseWheel_unbind())
 
 
 class simultaneousScrollbar(ttk.Scrollbar):
-	def __init__(self, master, factor = 2, **kwargs):
-		self.__scrollableWidgets = []
-		self.__onMouseWheel_callbacks = []
-		
-		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.")
-		else:
-			self.__orientLabel = 'y'
+    def __init__(self, master, factor = 0.5, **kwargs):
+        self.__scrollableWidgets = []
 
-		kwargs['command'] = self.onScroll
-		self.factor = factor
+        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.")
+        else:
+            self.__orientLabel = 'y'
 
-		ttk.Scrollbar.__init__(self, master, **kwargs)
+        kwargs['command'] = self.onScroll
+        self.factor = factor
+
+        ttk.Scrollbar.__init__(self, master, **kwargs)
 
 
-	def add_ScrollableArea(self, *scrollableWidgets):
-		for widget in scrollableWidgets:
-			self.__scrollableWidgets.append(widget)
-			widget[self.__orientLabel+'scrollcommand']=self.set
-			onMouseWheel_callback = MouseWheel.build_function_onMouseWheel(widget,self.__orientLabel, self.factor )
-			self.__onMouseWheel_callbacks.append(onMouseWheel_callback)
- 
-	def onScroll(self, *args):
-		for widget in self.__scrollableWidgets:
-			getattr(widget, self.__orientLabeself.__orientLabell+'view')(*args)
 
-	def onMouseWheel(self, event):
-		for callback in self.__onMouseWheel_callbacks:
-			callback(event)
-			
+    def add_ScrollableArea(self, *scrollableWidgets):
+        for widget in scrollableWidgets:
+            self.__scrollableWidgets.append(widget)
+            widget[self.__orientLabel+'scrollcommand']=self.set
+
+    def onScroll(self, *args):
+        for widget in self.__scrollableWidgets:
+            getattr(widget, self.__orientLabel+'view')(*args)
+
+    def onMouseWheel(self, delta):
+        for widget in self.__scrollableWidgets:
+            getattr(widget, self.__orientLabel+'view')("scroll",(-1)*int(delta/(120*self.factor)),"units" )
+
 def test():
-	root = tk.Tk()
+    root = tk.Tk()
 
-	scrollbar = simultaneousScrollbar(root, orient=tk.HORIZONTAL)
-	scrollbar.pack(side=tk.TOP, fill=tk.X)
+    scrollbar = simultaneousScrollbar(root, orient=tk.HORIZONTAL)
+    scrollbar.pack(side=tk.TOP, fill=tk.X)
 
-	emptySpace = tk.Frame(root, height=18)
-	emptySpace.pack()
+    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)
+    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()
+    frame1= tk.Frame(canvas1)
+    frame1.pack()
 
-	for i in range(20):
-		tk.Label(frame1, text="Label "+str(i)).pack(side=tk.LEFT)
+    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.create_window(0, 0, window=frame1, anchor='nw')
 
-	canvas1.update_idletasks()
+    canvas1.update_idletasks()
 
-	canvas1['scrollregion'] = (0,0,frame1.winfo_reqwidth(), frame1.winfo_reqheight())
+    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)
+    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()
+    frame2= tk.Frame(canvas2)
+    frame2.pack()
 
-	for i in range(20):
-		tk.Label(frame2, text="Label "+str(i)).pack(side=tk.LEFT)
+    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.create_window(0, 0, window=frame2, anchor='nw')
 
-	canvas2.update_idletasks()
-	canvas2['scrollregion'] = (0,0,frame2.winfo_reqwidth(), frame2.winfo_reqheight())
+    canvas2.update_idletasks()
+    canvas2['scrollregion'] = (0,0,frame2.winfo_reqwidth(), frame2.winfo_reqheight())
 
-	scrollbar.add_ScrollableArea(canvas1,canvas2)
+    scrollbar.add_ScrollableArea(canvas1,canvas2)
 
-	MouseWheel(root).add_scrolling(canvas1, xscrollbar=scrollbar)
-	MouseWheel(root).add_scrolling(canvas2, xscrollbar=scrollbar)
+    MouseWheel(root).add_scrolling(canvas1, xscrollbar=scrollbar)
+    MouseWheel(root).add_scrolling(canvas2, xscrollbar=scrollbar)
 
-	root.mainloop()
+    root.mainloop()
 
 if __name__== '__main__':
-	test()
+    test()