diff --git a/Lib/tkinter/__init__.py b/Lib/tkinter/__init__.py
index 03ac924..61f2ff9 100644
--- a/Lib/tkinter/__init__.py
+++ b/Lib/tkinter/__init__.py
@@ -1403,6 +1403,48 @@
             self.widget._report_exception()
 
 
+class XView:
+    """Mix-in class for querying and changing the horizontal position
+    of a widget's window."""
+
+    def xview(self, *args):
+        """Query and change the horizontal position of the view."""
+        res = self.tk.call(self._w, 'xview', *args)
+        if not args:
+            return self._getdoubles(res)
+
+    def xview_moveto(self, fraction):
+        """Adjusts the view in the window so that FRACTION of the
+        total width of the canvas is off-screen to the left."""
+        self.tk.call(self._w, 'xview', 'moveto', fraction)
+
+    def xview_scroll(self, number, what):
+        """Shift the x-view according to NUMBER which is measured in "units"
+        or "pages" (WHAT)."""
+        self.tk.call(self._w, 'xview', 'scroll', number, what)
+
+
+class YView:
+    """Mix-in class for querying and changing the vertical position
+    of a widget's window."""
+
+    def yview(self, *args):
+        """Query and change the vertical position of the view."""
+        res = self.tk.call(self._w, 'yview', *args)
+        if not args:
+            return self._getdoubles(res)
+
+    def yview_moveto(self, fraction):
+        """Adjusts the view in the window so that FRACTION of the
+        total height of the canvas is off-screen to the top."""
+        self.tk.call(self._w, 'yview', 'moveto', fraction)
+
+    def yview_scroll(self, number, what):
+        """Shift the y-view according to NUMBER which is measured in
+        "units" or "pages" (WHAT)."""
+        self.tk.call(self._w, 'yview', 'scroll', number, what)
+
+
 class Wm:
     """Provides functions for the communication with the window manager."""
 
@@ -2041,7 +2083,7 @@
     else:
         return '@%r,%r' % (x, y)
 
-class Canvas(Widget):
+class Canvas(Widget, XView, YView):
     """Canvas widget to display graphical elements like lines or text."""
     def __init__(self, master=None, cnf={}, **kw):
         """Construct a canvas widget with the parent MASTER.
@@ -2281,30 +2323,6 @@
     def type(self, tagOrId):
         """Return the type of the item TAGORID."""
         return self.tk.call(self._w, 'type', tagOrId) or None
-    def xview(self, *args):
-        """Query and change horizontal position of the view."""
-        if not args:
-            return self._getdoubles(self.tk.call(self._w, 'xview'))
-        self.tk.call((self._w, 'xview') + args)
-    def xview_moveto(self, fraction):
-        """Adjusts the view in the window so that FRACTION of the
-        total width of the canvas is off-screen to the left."""
-        self.tk.call(self._w, 'xview', 'moveto', fraction)
-    def xview_scroll(self, number, what):
-        """Shift the x-view according to NUMBER which is measured in "units" or "pages" (WHAT)."""
-        self.tk.call(self._w, 'xview', 'scroll', number, what)
-    def yview(self, *args):
-        """Query and change vertical position of the view."""
-        if not args:
-            return self._getdoubles(self.tk.call(self._w, 'yview'))
-        self.tk.call((self._w, 'yview') + args)
-    def yview_moveto(self, fraction):
-        """Adjusts the view in the window so that FRACTION of the
-        total height of the canvas is off-screen to the top."""
-        self.tk.call(self._w, 'yview', 'moveto', fraction)
-    def yview_scroll(self, number, what):
-        """Shift the y-view according to NUMBER which is measured in "units" or "pages" (WHAT)."""
-        self.tk.call(self._w, 'yview', 'scroll', number, what)
 
 class Checkbutton(Widget):
     """Checkbutton widget which is either in on- or off-state."""
@@ -2335,7 +2353,7 @@
         """Toggle the button."""
         self.tk.call(self._w, 'toggle')
 
-class Entry(Widget):
+class Entry(Widget, XView):
     """Entry widget which allows to display simple text."""
     def __init__(self, master=None, cnf={}, **kw):
         """Construct an entry widget with the parent MASTER.
@@ -2386,7 +2404,8 @@
         self.tk.call(self._w, 'selection', 'from', index)
     select_from = selection_from
     def selection_present(self):
-        """Return whether the widget has the selection."""
+        """Return True if there are characters selected in the entry, False
+        otherwise."""
         return self.tk.getboolean(
             self.tk.call(self._w, 'selection', 'present'))
     select_present = selection_present
@@ -2398,16 +2417,6 @@
         """Set the variable end of a selection to INDEX."""
         self.tk.call(self._w, 'selection', 'to', index)
     select_to = selection_to
-    def xview(self, index):
-        """Query and change horizontal position of the view."""
-        self.tk.call(self._w, 'xview', index)
-    def xview_moveto(self, fraction):
-        """Adjust the view in the window so that FRACTION of the
-        total width of the entry is off-screen to the left."""
-        self.tk.call(self._w, 'xview', 'moveto', fraction)
-    def xview_scroll(self, number, what):
-        """Shift the x-view according to NUMBER which is measured in "units" or "pages" (WHAT)."""
-        self.tk.call(self._w, 'xview', 'scroll', number, what)
 
 class Frame(Widget):
     """Frame widget which may contain other widgets and can have a 3D border."""
@@ -2449,7 +2458,7 @@
         """
         Widget.__init__(self, master, 'label', cnf, kw)
 
-class Listbox(Widget):
+class Listbox(Widget, XView, YView):
     """Listbox widget which can display a list of strings."""
     def __init__(self, master=None, cnf={}, **kw):
         """Construct a listbox widget with the parent MASTER.
@@ -2528,30 +2537,6 @@
     def size(self):
         """Return the number of elements in the listbox."""
         return getint(self.tk.call(self._w, 'size'))
-    def xview(self, *what):
-        """Query and change horizontal position of the view."""
-        if not what:
-            return self._getdoubles(self.tk.call(self._w, 'xview'))
-        self.tk.call((self._w, 'xview') + what)
-    def xview_moveto(self, fraction):
-        """Adjust the view in the window so that FRACTION of the
-        total width of the entry is off-screen to the left."""
-        self.tk.call(self._w, 'xview', 'moveto', fraction)
-    def xview_scroll(self, number, what):
-        """Shift the x-view according to NUMBER which is measured in "units" or "pages" (WHAT)."""
-        self.tk.call(self._w, 'xview', 'scroll', number, what)
-    def yview(self, *what):
-        """Query and change vertical position of the view."""
-        if not what:
-            return self._getdoubles(self.tk.call(self._w, 'yview'))
-        self.tk.call((self._w, 'yview') + what)
-    def yview_moveto(self, fraction):
-        """Adjust the view in the window so that FRACTION of the
-        total width of the entry is off-screen to the top."""
-        self.tk.call(self._w, 'yview', 'moveto', fraction)
-    def yview_scroll(self, number, what):
-        """Shift the y-view according to NUMBER which is measured in "units" or "pages" (WHAT)."""
-        self.tk.call(self._w, 'yview', 'scroll', number, what)
     def itemcget(self, index, option):
         """Return the resource value for an ITEM and an OPTION."""
         return self.tk.call(
@@ -2798,7 +2783,7 @@
 
 
 
-class Text(Widget):
+class Text(Widget, XView, YView):
     """Text widget which can display text in various forms."""
     def __init__(self, master=None, cnf={}, **kw):
         """Construct a text widget with the parent MASTER.
@@ -3120,32 +3105,6 @@
         """Return all names of embedded windows in this widget."""
         return self.tk.splitlist(
             self.tk.call(self._w, 'window', 'names'))
-    def xview(self, *what):
-        """Query and change horizontal position of the view."""
-        if not what:
-            return self._getdoubles(self.tk.call(self._w, 'xview'))
-        self.tk.call((self._w, 'xview') + what)
-    def xview_moveto(self, fraction):
-        """Adjusts the view in the window so that FRACTION of the
-        total width of the canvas is off-screen to the left."""
-        self.tk.call(self._w, 'xview', 'moveto', fraction)
-    def xview_scroll(self, number, what):
-        """Shift the x-view according to NUMBER which is measured
-        in "units" or "pages" (WHAT)."""
-        self.tk.call(self._w, 'xview', 'scroll', number, what)
-    def yview(self, *what):
-        """Query and change vertical position of the view."""
-        if not what:
-            return self._getdoubles(self.tk.call(self._w, 'yview'))
-        self.tk.call((self._w, 'yview') + what)
-    def yview_moveto(self, fraction):
-        """Adjusts the view in the window so that FRACTION of the
-        total height of the canvas is off-screen to the top."""
-        self.tk.call(self._w, 'yview', 'moveto', fraction)
-    def yview_scroll(self, number, what):
-        """Shift the y-view according to NUMBER which is measured
-        in "units" or "pages" (WHAT)."""
-        self.tk.call(self._w, 'yview', 'scroll', number, what)
     def yview_pickplace(self, *what):
         """Obsolete function, use see."""
         self.tk.call((self._w, 'yview', '-pickplace') + what)
@@ -3331,7 +3290,7 @@
 def image_types(): return _default_root.tk.call('image', 'types')
 
 
-class Spinbox(Widget):
+class Spinbox(Widget, XView):
     """spinbox widget."""
     def __init__(self, master=None, cnf={}, **kw):
         """Construct a spinbox widget with the parent MASTER.
diff --git a/Lib/tkinter/tix.py b/Lib/tkinter/tix.py
index 3bfa539..0c8ca68 100644
--- a/Lib/tkinter/tix.py
+++ b/Lib/tkinter/tix.py
@@ -850,7 +850,7 @@
         # FIXME: return python object
         pass
 
-class HList(TixWidget):
+class HList(TixWidget, XView, YView):
     """HList - Hierarchy display  widget can be used to display any data
     that have a hierarchical structure, for example, file system directory
     trees. The list entries are indented and connected by branch lines
@@ -1037,12 +1037,6 @@
     def show_entry(self, entry):
         return self.tk.call(self._w, 'show', 'entry', entry)
 
-    def xview(self, *args):
-        self.tk.call(self._w, 'xview', *args)
-
-    def yview(self, *args):
-        self.tk.call(self._w, 'yview', *args)
-
 class InputOnly(TixWidget):
     """InputOnly - Invisible widget. Unix only.
 
@@ -1419,7 +1413,7 @@
         if name in self.subwidget_list:
             self.tk.call(self._w, 'invoke', name)
 
-class TList(TixWidget):
+class TList(TixWidget, XView, YView):
     """TList - Hierarchy display widget which can be
     used to display data in a tabular format. The list entries of a TList
     widget are similar to the entries in the Tk listbox widget. The main
@@ -1502,12 +1496,6 @@
     def selection_set(self, first, last=None):
         self.tk.call(self._w, 'selection', 'set', first, last)
 
-    def xview(self, *args):
-        self.tk.call(self._w, 'xview', *args)
-
-    def yview(self, *args):
-        self.tk.call(self._w, 'yview', *args)
-
 class Tree(TixWidget):
     """Tree - The tixTree widget can be used to display hierachical
     data in a tree form. The user can adjust
@@ -1777,7 +1765,7 @@
     pass
 
 
-class Grid(TixWidget):
+class Grid(TixWidget, XView, YView):
     '''The Tix Grid command creates a new window  and makes it into a
     tixGrid widget. Additional options, may be specified on the command
     line or in the option database to configure aspects such as its cursor
@@ -1865,22 +1853,6 @@
     # def size dim index ?option value ...?
     # def unset x y
 
-    def xview(self):
-        return self._getdoubles(self.tk.call(self, 'xview'))
-    def xview_moveto(self, fraction):
-        self.tk.call(self,'xview', 'moveto', fraction)
-    def xview_scroll(self, count, what="units"):
-        "Scroll right (count>0) or left <count> of units|pages"
-        self.tk.call(self, 'xview', 'scroll', count, what)
-
-    def yview(self):
-        return self._getdoubles(self.tk.call(self, 'yview'))
-    def yview_moveto(self, fraction):
-        self.tk.call(self,'ysview', 'moveto', fraction)
-    def yview_scroll(self, count, what="units"):
-        "Scroll down (count>0) or up <count> of units|pages"
-        self.tk.call(self, 'yview', 'scroll', count, what)
-
 class ScrolledGrid(Grid):
     '''Scrolled Grid widgets'''
 
diff --git a/Lib/tkinter/ttk.py b/Lib/tkinter/ttk.py
index 108a65f..e10c668 100644
--- a/Lib/tkinter/ttk.py
+++ b/Lib/tkinter/ttk.py
@@ -1170,7 +1170,7 @@
         Widget.__init__(self, master, "ttk::sizegrip", kw)
 
 
-class Treeview(Widget):
+class Treeview(Widget, tkinter.XView, tkinter.YView):
     """Ttk Treeview widget displays a hierarchical collection of items.
 
     Each item has a textual label, an optional image, and an optional list
@@ -1480,16 +1480,6 @@
         return self.tk.call(self._w, "tag", "has", tagname, item)
 
 
-    def xview(self, *args):
-        """Query or modify horizontal position of the treeview."""
-        return self.tk.call(self._w, "xview", *args)
-
-
-    def yview(self, *args):
-        """Query or modify vertical position of the treeview."""
-        return self.tk.call(self._w, "yview", *args)
-
-
 # Extensions
 
 class LabeledScale(Frame):