# Version: 0.8
# 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()
def build_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
class Mousewheel_Support(object):
# implemetnation of singleton pattern
_instance = None
def __new__(cls, *args, **kwargs):
if not cls._instance:
cls._instance = super(Mousewheel_Support, cls).__new__(cls, *args, **kwargs)
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_mouse_wheel, add='+')
root.bind_all('<5>', self._on_mouse_wheel, add='+')
else:
# Windows and MacOS
root.bind_all("<MouseWheel>", self._on_mouse_wheel, add='+')
def _on_mouse_wheel(self,event):
if self._active_area:
self._active_area.onMouseWheel(event)
def _on_mouse_enter_scrolling_area(self, widget):
self._active_area = widget
def _on_mouse_leave_scrolling_area(self):
self._active_area = None
def add_support_to(self, widget, hscrollbar=None, vscrollbar=None, main_direction=None, what="units"):
if hscrollbar is not None and not hasattr(hscrollbar, 'onMouseWheel'):
hscrollbar.onMouseWheel = build_mouse_wheel_handler(widget,'x', self.horizontal_factor, what)
hscrollbar.bind('<Enter>', lambda event, scrollbar=hscrollbar: self._on_mouse_enter_scrolling_area(scrollbar) )
hscrollbar.bind('<Leave>', lambda event: self._on_mouse_leave_scrolling_area())
if vscrollbar is not None and not hasattr(vscrollbar, 'onMouseWheel'):
vscrollbar.onMouseWheel = build_mouse_wheel_handler(widget,'y', self.vertical_factor, what)
vscrollbar.bind('<Enter>', lambda event, scrollbar=vscrollbar: self._on_mouse_enter_scrolling_area(scrollbar) )
vscrollbar.bind('<Leave>', lambda event: self._on_mouse_leave_scrolling_area())
main_scrollbar = vscrollbar if vscrollbar is not None else hscrollbar
if main_scrollbar is not None:
widget.bind('<Enter>',lambda event: self._on_mouse_enter_scrolling_area(widget))
widget.bind('<Leave>', lambda event: self._on_mouse_leave_scrolling_area())
widget.onMouseWheel = main_scrollbar.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 18 2017-04-17 19:28:37
+++ revision 19 2017-04-17 20:00:41
@@ -67,26 +67,24 @@
def _on_mouse_leave_scrolling_area(self):
self._active_area = None
- def add_support_to(self, widget, xscrollbar=None, yscrollbar=None, what="units"):
- widget.bind('<Enter>',lambda event: self._on_mouse_enter_scrolling_area(widget))
- widget.bind('<Leave>', lambda event: self._on_mouse_leave_scrolling_area())
+ def add_support_to(self, widget, hscrollbar=None, vscrollbar=None, main_direction=None, what="units"):
+ if hscrollbar is not None and not hasattr(hscrollbar, 'onMouseWheel'):
+ hscrollbar.onMouseWheel = build_mouse_wheel_handler(widget,'x', self.horizontal_factor, what)
+ hscrollbar.bind('<Enter>', lambda event, scrollbar=hscrollbar: self._on_mouse_enter_scrolling_area(scrollbar) )
+ hscrollbar.bind('<Leave>', lambda event: self._on_mouse_leave_scrolling_area())
- if xscrollbar and not hasattr(xscrollbar, 'onMouseWheel'):
- xscrollbar.onMouseWheel = build_mouse_wheel_handler(widget,'x', self.horizontal_factor, what)
+ if vscrollbar is not None and not hasattr(vscrollbar, 'onMouseWheel'):
+ vscrollbar.onMouseWheel = build_mouse_wheel_handler(widget,'y', self.vertical_factor, what)
+ vscrollbar.bind('<Enter>', lambda event, scrollbar=vscrollbar: self._on_mouse_enter_scrolling_area(scrollbar) )
+ vscrollbar.bind('<Leave>', lambda event: self._on_mouse_leave_scrolling_area())
- if yscrollbar and not hasattr(yscrollbar, 'onMouseWheel'):
- yscrollbar.onMouseWheel = build_mouse_wheel_handler(widget,'y', self.vertical_factor, what)
+ main_scrollbar = vscrollbar if vscrollbar is not None else hscrollbar
+
+ if main_scrollbar is not None:
+ widget.bind('<Enter>',lambda event: self._on_mouse_enter_scrolling_area(widget))
+ widget.bind('<Leave>', lambda event: self._on_mouse_leave_scrolling_area())
- main_scrollbar = yscrollbar if yscrollbar is not None else xscrollbar
-
- if main_scrollbar:
widget.onMouseWheel = main_scrollbar.onMouseWheel
-
- for scrollbar in (xscrollbar, yscrollbar):
- if scrollbar:
- scrollbar.bind('<Enter>', lambda event, scrollbar=scrollbar: self._on_mouse_enter_scrolling_area(scrollbar) )
- scrollbar.bind('<Leave>', lambda event: self._on_mouse_leave_scrolling_area())
-
if __name__== '__main__':
try:
