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<TITLE>PmwScrolledText.py</TITLE>
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<PRE>
<FONT COLOR="#DD0000"># Based on iwidgets2.2.0/scrolledtext.itk code. </FONT>
import Tkinter
import Pmw
<STRONG><FONT COLOR="#CC6600">class ScrolledText</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">'labelmargin'</FONT>, 0, INITOPT),
(<FONT COLOR="#009900">'labelpos'</FONT>, None, INITOPT),
(<FONT COLOR="#009900">'scrollmargin'</FONT>, 2, INITOPT),
(<FONT COLOR="#009900">'vscrollmode'</FONT>, <FONT COLOR="#009900">'dynamic'</FONT>, self._vscrollMode),
(<FONT COLOR="#009900">'hscrollmode'</FONT>, <FONT COLOR="#009900">'dynamic'</FONT>, self._hscrollMode),
)
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 text widget.</FONT>
self._textbox = self.createcomponent(<FONT COLOR="#009900">'text'</FONT>,
(), None,
Tkinter.Text, (interior,),
xscrollcommand=self._scrollTextX,
yscrollcommand=self._scrollTextY)
self._textbox.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._textbox.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._textbox.xview)
self.createlabel(interior, childCols = 3, childRows = 3)
<FONT COLOR="#DD0000"># Initialise instance variables.</FONT>
self._vertMode = None
self._horizMode = None
self._horizRecurse = 0
<FONT COLOR="#DD0000"># Check keywords and initialise options.</FONT>
self.initialiseoptions(ScrolledText)
<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 clear</STRONG>(self):
self._textbox.delete(<FONT COLOR="#009900">'1.0'</FONT>, <FONT COLOR="#009900">'end'</FONT>)
<STRONG> def importfile</STRONG>(self, fileName, where = <FONT COLOR="#009900">'end'</FONT>):
file = open(fileName, <FONT COLOR="#009900">'r'</FONT>)
self._textbox.insert(where, file.read())
file.close()
<STRONG> def exportfile</STRONG>(self, fileName):
file = open(fileName, <FONT COLOR="#009900">'w'</FONT>)
file.write(self._textbox.get(<FONT COLOR="#009900">'1.0'</FONT>, <FONT COLOR="#009900">'end'</FONT>))
file.close()
<STRONG> def settext</STRONG>(self, text):
disabled = (self._textbox.cget(<FONT COLOR="#009900">'state'</FONT>) == <FONT COLOR="#009900">'disabled'</FONT>)
if disabled:
self._textbox.configure(state=<FONT COLOR="#009900">'normal'</FONT>)
self._textbox.delete(<FONT COLOR="#009900">'0.0'</FONT>, <FONT COLOR="#009900">'end'</FONT>)
self._textbox.insert(<FONT COLOR="#009900">'end'</FONT>, text)
if disabled:
self._textbox.configure(state=<FONT COLOR="#009900">'disabled'</FONT>)
<FONT COLOR="#DD0000"># Override Tkinter.Text get method, so that if it is called with</FONT>
<FONT COLOR="#DD0000"># no arguments, return all text (consistent with other widgets).</FONT>
<STRONG> def get</STRONG>(self, first=None, last=None):
if not first and not last:
return self._textbox.get(<FONT COLOR="#009900">'1.0'</FONT>, <FONT COLOR="#009900">'end'</FONT>)
else:
return self._textbox.get(first, last)
<FONT COLOR="#DD0000"># ======================================================================</FONT>
<FONT COLOR="#DD0000"># Private methods.</FONT>
<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 _scrollTextX</STRONG>(self, first, last):
self._horizScrollbar.set(first, last)
<FONT COLOR="#DD0000"># Infinite recursion must be avoided for dynamic horizontal scrollbars.</FONT>
<FONT COLOR="#DD0000"># A max depth of 1 is allowed for hiding the scrollbar, 2 for showing</FONT>
# it, so that showing always <FONT COLOR="#009900">'wins'</FONT>!
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>:
if self._horizMode:
if self._horizRecurse < 2:
self._horizRecurse = self._horizRecurse + 1
self._horizScrollbarDisplay(0)
self.update_idletasks()
self._horizRecurse = self._horizRecurse - 1
else:
if not self._horizMode:
if self._horizRecurse < 3:
self._horizRecurse = self._horizRecurse + 1
self._horizScrollbarDisplay(1)
self.update_idletasks()
self._horizRecurse = self._horizRecurse - 1
<STRONG> def _scrollTextY</STRONG>(self, first, last):
<FONT COLOR="#DD0000"># The text widget calls this just after it has been created,</FONT>
# with arguments (<FONT COLOR="#009900">'0'</FONT>, <FONT COLOR="#009900">'0'</FONT>).
if first == <FONT COLOR="#009900">'0'</FONT> and last == <FONT COLOR="#009900">'0'</FONT>:
return
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_)bbox method inherited from Tkinter.Frame.Grid.</FONT>
<STRONG> def bbox</STRONG>(self, index):
return self._textbox.bbox(index)
Pmw.forwardmethods(ScrolledText, Tkinter.Text, <FONT COLOR="#009900">'_textbox'</FONT>)
</PRE>
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