New submission from paolo <paolo.fr...@libero.it>:
I wish to propose a useful and smart method modify in Tkinter Library:
Previously to scroll this widget we had to write an external function
(recalling xview_moveto and xview_scroll).
With my method this operation is cleared and the same as all other
widgets (just have to call xview).
----------------------------------------------------------
Modify Proposal:
----------------------------------------------------------
Change the method xview of entry so it works as all widget scrollable,
and it's compatible with 'old' xview.
So to scroll entry widget:
entry_widget['xscrollcommand']=scroll_widget.set
scroll_widget['command']=entry_widget.xview
The change in module Tkinter is:
def xview(self,*args):
"""Query and change horizontal position of the view."""
#modify
if not args:
return self._getdoubles(self.tk.call(self._w, 'xview'))
#old code
index=args[0]
self.tk.call(self._w, 'xview', index)
----------------------------------------------------------
+
It's call the tk interpreter passing entry and xview without arguments;
returns a list containing two elements to pass to scrollbars via the
xscrollcommand option
If an argument (index) is passing, then display the character given by
index at the left edge of the window; it work as the original xview
With 'old' methon is impossible call xview without arguments, the change
has made possible this.
-----------------------------------------------------------------
To scroll entry without modify:
-------------------------------
import Tkinter as tk
root=tk.Tk()
def scollEntry(*args):
if args[0]=='scroll':
e.xview_scroll(args[1],args[2])
if args[0]=='moveto':
e.xview_moveto(args[1])
e=tk.Entry(width=10)
e.grid(row=0, sticky='e'+'w')
s=tk.Scrollbar(orient='horizontal')
s.grid(row=1, sticky='e'+'w')
e['xscrollcommand']=s.set
s['command']=scollEntry
root.mainloop()
--------------------------------------------------------------------
With modify:
------------
import Tkinter as tk
root=tk.Tk()
e=tk.Entry(width=10)
e.grid(row=0, sticky='e'+'w')
s=tk.Scrollbar(orient='horizontal')
s.grid(row=1, sticky='e'+'w')
e['xscrollcommand']=s.set
s['command']=e.xview
root.mainloop()
-----------------------------------------------------------------
It's work also with tk-8.5 and ttk
----------------------------------
import Tkinter as tk
import ttk
root=tk.Tk()
e=ttk.Entry(width=10)
e.grid(row=0, sticky='e'+'w')
s=ttk.Scrollbar(orient='horizontal')
s.grid(row=1, sticky='e'+'w')
e['xscrollcommand']=s.set
s['command']=e.xview
root.mainloop()
---------------------------------------------------------
I tested with Python 2.5 and tk 8.4 and also tk 8.5 and module ttk
----------
components: Tkinter
messages: 91547
nosy: paolo
severity: normal
status: open
title: Tkinter: modify xview of entry widget
versions: Python 2.5
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue6702>
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