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<TITLE>PmwScrolledListBox.py</TITLE>
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<PRE>
<FONT COLOR="#DD0000"># Based on iwidgets2.2.0/scrolledlistbox.itk code.</FONT>
import types
import Tkinter
import Pmw
<STRONG><FONT COLOR="#CC6600">class ScrolledListBox</FONT></STRONG>(Pmw.MegaWidget):
<STRONG> def __init__</STRONG>(self, parent = None, **kw):
<FONT COLOR="#DD0000"># Define the megawidget options.</FONT>
INITOPT = Pmw.INITOPT
optiondefs = (
(<FONT COLOR="#009900">'dblclickcommand'</FONT>, <FONT COLOR="#009900">''</FONT>, None),
(<FONT COLOR="#009900">'hscrollmode'</FONT>, <FONT COLOR="#009900">'dynamic'</FONT>, self._hscrollMode),
(<FONT COLOR="#009900">'items'</FONT>, (), INITOPT),
(<FONT COLOR="#009900">'labelmargin'</FONT>, 0, INITOPT),
(<FONT COLOR="#009900">'labelpos'</FONT>, None, INITOPT),
(<FONT COLOR="#009900">'scrollmargin'</FONT>, 2, INITOPT),
(<FONT COLOR="#009900">'selectioncommand'</FONT>, <FONT COLOR="#009900">''</FONT>, None),
(<FONT COLOR="#009900">'vscrollmode'</FONT>, <FONT COLOR="#009900">'dynamic'</FONT>, self._vscrollMode),
)
self.defineoptions(kw, optiondefs)
<FONT COLOR="#DD0000"># Initialise the base class (after defining the options).</FONT>
Pmw.MegaWidget.__init__(self, parent)
<FONT COLOR="#DD0000"># Create the components.</FONT>
interior = self.interior()
<FONT COLOR="#DD0000"># Create the listbox widget.</FONT>
self._listbox = self.createcomponent(<FONT COLOR="#009900">'listbox'</FONT>,
(), None,
Tkinter.Listbox, (interior,),
xscrollcommand=self._scrollListX,
yscrollcommand=self._scrollListY)
self._listbox.grid(row = 2, column = 2, sticky = <FONT COLOR="#009900">'news'</FONT>)
interior.grid_rowconfigure(2, weight = 1, minsize = 0)
interior.grid_columnconfigure(2, weight = 1, minsize = 0)
<FONT COLOR="#DD0000"># Create the vertical scrollbar</FONT>
self._vertScrollbar = self.createcomponent(<FONT COLOR="#009900">'vertscrollbar'</FONT>,
(), <FONT COLOR="#009900">'Scrollbar'</FONT>,
Tkinter.Scrollbar, (interior,),
orient=<FONT COLOR="#009900">'vertical'</FONT>, command=self._listbox.yview)
<FONT COLOR="#DD0000"># Create the horizontal scrollbar</FONT>
self._horizScrollbar = self.createcomponent(<FONT COLOR="#009900">'horizscrollbar'</FONT>,
(), <FONT COLOR="#009900">'Scrollbar'</FONT>,
Tkinter.Scrollbar, (interior,),
orient=<FONT COLOR="#009900">'horizontal'</FONT>, command=self._listbox.xview)
self.createlabel(interior, childCols = 3, childRows = 3)
<FONT COLOR="#DD0000"># Add the items specified by the initialisation option.</FONT>
items = self[<FONT COLOR="#009900">'items'</FONT>]
if type(items) != types.TupleType:
items = tuple(items)
if len(items) > 0:
apply(self._listbox.insert, (<FONT COLOR="#009900">'end'</FONT>,) + items)
tag = <FONT COLOR="#009900">'SLBSelect'</FONT> + str(self)
self.bind_class(tag, <FONT COLOR="#009900">'<Control-Key-backslash>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Control-Key-slash>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Key-Escape>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Shift-Key-Select>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Control-Shift-Key-space>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Key-Select>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Key-space>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Control-Shift-Key-End>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Control-Key-End>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Control-Shift-Key-Home>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Control-Key-Home>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Shift-Key-Down>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Shift-Key-Up>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Control-Button-1>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Shift-Button-1>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<ButtonRelease-1>'</FONT>, self._makeSelection)
self.bind_class(tag, <FONT COLOR="#009900">'<Double-1>'</FONT>, self._doubleClick)
self._listbox.bindtags(self._listbox.bindtags() + (tag,))
<FONT COLOR="#DD0000"># Initialise instance variables.</FONT>
self._vertMode = None
self._horizMode = None
<FONT COLOR="#DD0000"># Check keywords and initialise options.</FONT>
self.initialiseoptions(ScrolledListBox)
<FONT COLOR="#DD0000"># ======================================================================</FONT>
<FONT COLOR="#DD0000"># Configuration methods.</FONT>
<STRONG> def _vscrollMode</STRONG>(self):
mode = self[<FONT COLOR="#009900">'vscrollmode'</FONT>]
if mode == <FONT COLOR="#009900">'static'</FONT>:
self._vertScrollbarDisplay(1)
elif mode == <FONT COLOR="#009900">'dynamic'</FONT> or mode == <FONT COLOR="#009900">'none'</FONT>:
self._vertScrollbarDisplay(0)
else:
message = <FONT COLOR="#009900">'bad vscrollmode option "%s": should be static, dynamic, or none'</FONT> % mode
raise ValueError, message
<STRONG> def _hscrollMode</STRONG>(self):
mode = self[<FONT COLOR="#009900">'hscrollmode'</FONT>]
if mode == <FONT COLOR="#009900">'static'</FONT>:
self._horizScrollbarDisplay(1)
elif mode == <FONT COLOR="#009900">'dynamic'</FONT> or mode == <FONT COLOR="#009900">'none'</FONT>:
self._horizScrollbarDisplay(0)
else:
message = <FONT COLOR="#009900">'bad hscrollmode option "%s": should be static, dynamic, or none'</FONT> % mode
raise ValueError, message
<FONT COLOR="#DD0000"># ======================================================================</FONT>
<FONT COLOR="#DD0000"># Public methods.</FONT>
<STRONG> def getcurselection</STRONG>(self):
rtn = []
for sel in self.curselection():
rtn.append(self._listbox.get(sel))
return tuple(rtn)
<STRONG> def justify</STRONG>(self, direction):
if direction == <FONT COLOR="#009900">'left'</FONT>:
self._listbox.xview(<FONT COLOR="#009900">'moveto'</FONT>, 0)
elif direction == <FONT COLOR="#009900">'right'</FONT>:
self._listbox.xview(<FONT COLOR="#009900">'moveto'</FONT>, 1)
elif direction == <FONT COLOR="#009900">'top'</FONT>:
self._listbox.yview(<FONT COLOR="#009900">'moveto'</FONT>, 0)
elif direction == <FONT COLOR="#009900">'bottom'</FONT>:
self._listbox.yview(<FONT COLOR="#009900">'moveto'</FONT>, 1)
else:
validValues = <FONT COLOR="#009900">'left, right, top, or bottom'</FONT>
raise ValueError, \
<FONT COLOR="#009900">'bad justify argument "%s": should be %s'</FONT> \
% (direction, validValues)
<STRONG> def setlist</STRONG>(self, items):
self._listbox.delete(0, <FONT COLOR="#009900">'end'</FONT>)
if len(items) > 0:
if type(items) != types.TupleType:
items = tuple(items)
apply(self._listbox.insert, (0,) + items)
<FONT COLOR="#DD0000"># ======================================================================</FONT>
<FONT COLOR="#DD0000"># Private methods.</FONT>
<STRONG> def _makeSelection</STRONG>(self, event):
command = self[<FONT COLOR="#009900">'selectioncommand'</FONT>]
if callable(command):
command()
<STRONG> def _doubleClick</STRONG>(self, event):
command = self[<FONT COLOR="#009900">'dblclickcommand'</FONT>]
if callable(command):
command()
<STRONG> def _vertScrollbarDisplay</STRONG>(self, mode):
if mode != self._vertMode:
self._vertMode = mode
margin = self[<FONT COLOR="#009900">'scrollmargin'</FONT>]
interior = self.interior()
if self._vertMode:
self._vertScrollbar.grid(row = 2, column = 4, sticky = <FONT COLOR="#009900">'news'</FONT>)
interior.grid_columnconfigure(3, minsize = margin)
else:
self._vertScrollbar.grid_forget()
interior.grid_columnconfigure(3, minsize = 0)
<STRONG> def _horizScrollbarDisplay</STRONG>(self, mode):
if mode != self._horizMode:
self._horizMode = mode
margin = self[<FONT COLOR="#009900">'scrollmargin'</FONT>]
interior = self.interior()
if self._horizMode:
self._horizScrollbar.grid(row = 4, column = 2, sticky = <FONT COLOR="#009900">'news'</FONT>)
interior.grid_rowconfigure(3, minsize = margin)
else:
self._horizScrollbar.grid_forget()
interior.grid_rowconfigure(3, minsize = 0)
<STRONG> def _scrollListX</STRONG>(self, first, last):
self._horizScrollbar.set(first, last)
if self[<FONT COLOR="#009900">'hscrollmode'</FONT>] == <FONT COLOR="#009900">'dynamic'</FONT>:
if first == <FONT COLOR="#009900">'0'</FONT> and last == <FONT COLOR="#009900">'1'</FONT>:
self._horizScrollbarDisplay(0)
else:
self._horizScrollbarDisplay(1)
<STRONG> def _scrollListY</STRONG>(self, first, last):
self._vertScrollbar.set(first, last)
if self[<FONT COLOR="#009900">'vscrollmode'</FONT>] == <FONT COLOR="#009900">'dynamic'</FONT>:
if first == <FONT COLOR="#009900">'0'</FONT> and last == <FONT COLOR="#009900">'1'</FONT>:
self._vertScrollbarDisplay(0)
else:
self._vertScrollbarDisplay(1)
<FONT COLOR="#DD0000"># Need to explicitly forward this to override the stupid</FONT>
<FONT COLOR="#DD0000"># (grid_)size method inherited from Tkinter.Frame.Grid.</FONT>
<STRONG> def size</STRONG>(self):
return self._listbox.size()
Pmw.forwardmethods(ScrolledListBox, Tkinter.Listbox, <FONT COLOR="#009900">'_listbox'</FONT>)
</PRE>
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