In case Someone Else(TM) may need this.
This code is just how it currently looks, what I needed for my code, so it's not
a full-fledged or even tested class.
But it works.
<code language="Py3">
import tkinter as t
import tkinter.simpledialog
import tkinter.messagebox
t.askstring = tkinter.simpledialog.askstring
t.warningbox = tkinter.messagebox.showwarning
class UsableListbox( t.Frame ):
def __init__( self, parent_widget ):
t.Frame.__init__( self, parent_widget )
scrollbar = t.Scrollbar( self, orient = "vertical" )
self.lb = t.Listbox( self, yscrollcommand = scrollbar.set )
scrollbar.config( command = self.lb.yview )
scrollbar.pack( side = "right", fill = "y" )
self.lb.pack( side = "left", fill = "both", expand = 1 )
def current_index( self ):
indices = self.lb.curselection()
assert( len( indices ) <= 1 ) # TODO: about multi-selection.
return None if len( indices ) == 0 else int( indices[0] )
def current( self ):
#return self.lb.get( "active" ) # Incorrect with mousing
i = self.current_index()
return "" if i is None else self.lb.get( i )
def append( self, item ):
return self.lb.insert( "end", item )
def add_selection_event_handler( self, handler ):
"An event handler takes one argument, a Tkinter Event"
return self.lb.bind( "<<ListboxSelect>>", handler )
</code>
Cheers,
- Alf
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