# Version: 1.1
# Author: Miguel Martinez Lopez
# Uncomment the next line to see my email
# print ("Author's email: %s"% "61706c69636163696f6e616d656469646140676d61696c2e636f6d".decode("hex"))
import platform
OS = platform.system()
class Mousewheel_Support(object):
# implemetation of singleton pattern
_instance = None
def __new__(cls, *args, **kwargs):
if not cls._instance:
cls._instance = object.__new__(cls)
return cls._instance
def __init__(self, root, horizontal_factor = 2, vertical_factor=2):
self._active_area = None
if isinstance(horizontal_factor, int):
self.horizontal_factor = horizontal_factor
else:
raise Exception("Vertical factor must be an integer.")
if isinstance(vertical_factor, int):
self.vertical_factor = vertical_factor
else:
raise Exception("Horizontal factor must be an integer.")
if OS == "Linux" :
root.bind_all('<4>', self._on_mousewheel, add='+')
root.bind_all('<5>', self._on_mousewheel, add='+')
else:
# Windows and MacOS
root.bind_all("<MouseWheel>", self._on_mousewheel, add='+')
def _on_mousewheel(self,event):
if self._active_area:
self._active_area.onMouseWheel(event)
def _mousewheel_bind(self, widget):
self._active_area = widget
def _mousewheel_unbind(self):
self._active_area = None
def add_support_to(self, widget=None, xscrollbar=None, yscrollbar=None, what="units", horizontal_factor=None, vertical_factor=None):
if xscrollbar is None and yscrollbar is None:
return
if xscrollbar is not None:
horizontal_factor = horizontal_factor or self.horizontal_factor
xscrollbar.onMouseWheel = self._make_mouse_wheel_handler(widget,'x', self.horizontal_factor, what)
xscrollbar.bind('<Enter>', lambda event, scrollbar=xscrollbar: self._mousewheel_bind(scrollbar) )
xscrollbar.bind('<Leave>', lambda event: self._mousewheel_unbind())
if yscrollbar is not None:
vertical_factor = vertical_factor or self.vertical_factor
yscrollbar.onMouseWheel = self._make_mouse_wheel_handler(widget,'y', self.vertical_factor, what)
yscrollbar.bind('<Enter>', lambda event, scrollbar=yscrollbar: self._mousewheel_bind(scrollbar) )
yscrollbar.bind('<Leave>', lambda event: self._mousewheel_unbind())
main_scrollbar = yscrollbar if yscrollbar is not None else xscrollbar
if widget is not None:
widget.bind('<Enter>',lambda event: self._mousewheel_bind(widget))
widget.bind('<Leave>', lambda event: self._mousewheel_unbind())
widget.onMouseWheel = main_scrollbar.onMouseWheel
@staticmethod
def _make_mouse_wheel_handler(widget, orient, factor = 1, what="units"):
view_command = getattr(widget, orient+'view')
if OS == 'Linux':
def onMouseWheel(event):
if event.num == 4:
view_command("scroll",(-1)*factor, what)
elif event.num == 5:
view_command("scroll",factor, what)
elif OS == 'Windows':
def onMouseWheel(event):
view_command("scroll",(-1)*int((event.delta/120)*factor), what)
elif OS == 'Darwin':
def onMouseWheel(event):
view_command("scroll",event.delta, what)
return onMouseWheel
if __name__== '__main__':
try:
from Tkinter import Tk, Scrollbar, Text
from Tkconstants import *
except ImportError:
from tkinter import Tk, Scrollbar, Text
from tkinter.constants import *
root = Tk()
lorem_ipsum = """Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, consequat vitae, eleifend ac, enim. Aliquam lorem ante, dapibus in, viverra quis, feugiat a, tellus. Phasellus viverra nulla ut metus varius laoreet. """
xscrollbar = Scrollbar(root, orient=HORIZONTAL)
xscrollbar.pack(side=BOTTOM, fill=X)
yscrollbar = Scrollbar(root)
yscrollbar.pack(side=RIGHT, fill=Y)
textarea = Text(root, wrap="none", height=20, width=27,
xscrollcommand=xscrollbar.set,
yscrollcommand=yscrollbar.set)
textarea.pack()
textarea.insert(1.0, "\n\n".join(lorem_ipsum.split(".")))
textarea.configure(yscrollcommand=yscrollbar.set)
yscrollbar['command']=textarea.yview
textarea.configure(xscrollcommand=xscrollbar.set)
xscrollbar['command']=textarea.xview
mousewheel_support = Mousewheel_Support(root)
mousewheel_support.add_support_to(textarea, xscrollbar=xscrollbar, yscrollbar=yscrollbar, what="pages")
root.mainloop()
Diff to Previous Revision
--- revision 26 2017-05-05 15:52:06
+++ revision 27 2017-05-05 19:09:17
@@ -1,4 +1,4 @@
-# Version: 1.0
+# Version: 1.1
# Author: Miguel Martinez Lopez
# Uncomment the next line to see my email
# print ("Author's email: %s"% "61706c69636163696f6e616d656469646140676d61696c2e636f6d".decode("hex"))
@@ -14,7 +14,7 @@
_instance = None
def __new__(cls, *args, **kwargs):
if not cls._instance:
- cls._instance = object.__new__(cls, *args, **kwargs)
+ cls._instance = object.__new__(cls)
return cls._instance
def __init__(self, root, horizontal_factor = 2, vertical_factor=2):
@@ -49,14 +49,17 @@
self._active_area = None
def add_support_to(self, widget=None, xscrollbar=None, yscrollbar=None, what="units", horizontal_factor=None, vertical_factor=None):
- if xscrollbar is not None and not hasattr(xscrollbar, 'onMouseWheel'):
+ if xscrollbar is None and yscrollbar is None:
+ return
+
+ if xscrollbar is not None:
horizontal_factor = horizontal_factor or self.horizontal_factor
xscrollbar.onMouseWheel = self._make_mouse_wheel_handler(widget,'x', self.horizontal_factor, what)
xscrollbar.bind('<Enter>', lambda event, scrollbar=xscrollbar: self._mousewheel_bind(scrollbar) )
xscrollbar.bind('<Leave>', lambda event: self._mousewheel_unbind())
- if yscrollbar is not None and not hasattr(yscrollbar, 'onMouseWheel'):
+ if yscrollbar is not None:
vertical_factor = vertical_factor or self.vertical_factor
yscrollbar.onMouseWheel = self._make_mouse_wheel_handler(widget,'y', self.vertical_factor, what)
@@ -65,7 +68,7 @@
main_scrollbar = yscrollbar if yscrollbar is not None else xscrollbar
- if widget is not None and main_scrollbar is not None:
+ if widget is not None:
widget.bind('<Enter>',lambda event: self._mousewheel_bind(widget))
widget.bind('<Leave>', lambda event: self._mousewheel_unbind())
