File: PmwButtonBox.py.html

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<!DOCTYPE HTML PUBLIC "-//Netscape_Microsoft//DTD HTML 3.0//EN">
<HTML>

<!-- This file generated using the Python HTMLgen module. -->
<HEAD>
  <META NAME="GENERATOR" CONTENT="HTMLgen 1.1">
        <TITLE>PmwButtonBox.py</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<PRE>
<FONT COLOR="#DD0000"># Based on iwidgets2.2.0/buttonbox.itk code.</FONT>

import Tkinter
import Pmw

<STRONG><FONT COLOR="#CC6600">class ButtonBox</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">'orient'</FONT>,            <FONT COLOR="#009900">'horizontal'</FONT>,   INITOPT),
	    (<FONT COLOR="#009900">'padx'</FONT>,              8,              INITOPT),
	    (<FONT COLOR="#009900">'pady'</FONT>,              8,              INITOPT),
	    (<FONT COLOR="#009900">'ringborderwidth'</FONT>,   1,              INITOPT),
	    (<FONT COLOR="#009900">'ringpadx'</FONT>,          1,              INITOPT),
	    (<FONT COLOR="#009900">'ringpady'</FONT>,          1,              INITOPT),
	)
	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()
	if self[<FONT COLOR="#009900">'labelpos'</FONT>] is None:
	    self._buttonBoxFrame = self._hull
	    columnOrRow = 0
	else:
	    self._buttonBoxFrame = self.createcomponent(<FONT COLOR="#009900">'frame'</FONT>,
		    (), None,
		    Tkinter.Frame, (interior,))
	    self._buttonBoxFrame.grid(column=2, row=2, sticky=<FONT COLOR="#009900">'nsew'</FONT>)
	    columnOrRow = 2

	    self.createlabel(interior)

	if self[<FONT COLOR="#009900">'orient'</FONT>] == <FONT COLOR="#009900">'horizontal'</FONT>:
	    interior.grid_columnconfigure(columnOrRow, weight = 1)
	else:
	    interior.grid_rowconfigure(columnOrRow, weight = 1)

	<FONT COLOR="#DD0000"># Initialise instance variables.</FONT>

	<FONT COLOR="#DD0000"># List of tuples describing the buttons:</FONT>
	<FONT COLOR="#DD0000">#   - name</FONT>
	<FONT COLOR="#DD0000">#   - button widget</FONT>
	<FONT COLOR="#DD0000">#   - surrounding frame widget</FONT>
	self._buttonList = []

	<FONT COLOR="#DD0000"># The index of the default button.</FONT>
	self._defaultButton = None

	self._timerId = None

	<FONT COLOR="#DD0000"># Check keywords and initialise options.</FONT>
	self.initialiseoptions(ButtonBox)

<STRONG>    def destroy</STRONG>(self):
	if self._timerId:
	    self.after_cancel(self._timerId)
	    self._timerId = None
	Pmw.MegaWidget.destroy(self)

<STRONG>    def numbuttons</STRONG>(self):
        return len(self._buttonList)

<STRONG>    def index</STRONG>(self, index, forInsert = 0):
	listLength = len(self._buttonList)
	if type(index) == type(1):
	    if forInsert and index <= listLength:
		return index
	    elif not forInsert and index < listLength:
		return index
	    else:
		raise ValueError, <FONT COLOR="#009900">'index "%s" is out of range'</FONT> % index
	elif index == <FONT COLOR="#009900">'end'</FONT>:
	    if forInsert:
		return listLength
	    elif listLength > 0:
		return listLength - 1
	    else:
		raise ValueError, <FONT COLOR="#009900">'ButtonBox has no buttons'</FONT>
	elif index == <FONT COLOR="#009900">'default'</FONT>:
	    if self._defaultButton is not None:
		return self._defaultButton
	    raise ValueError, <FONT COLOR="#009900">'ButtonBox has no default'</FONT>
	else:
	    for count in range(listLength):
		name = self._buttonList[count][0]
		if index == name:
		    return count
	    validValues = <FONT COLOR="#009900">'number, end, default, or a name'</FONT>
	    raise ValueError, \
		<FONT COLOR="#009900">'bad index "%s": must be %s'</FONT> % (index, validValues)

<STRONG>    def insert</STRONG>(self, name, before = 0, **kw):
	if name in self.components():
	    raise ValueError, <FONT COLOR="#009900">'button "%s" already exists'</FONT> % name
	frame = Tkinter.Frame(self._buttonBoxFrame,
		borderwidth = self[<FONT COLOR="#009900">'ringborderwidth'</FONT>], relief = <FONT COLOR="#009900">'flat'</FONT>)
	if not kw.has_key(<FONT COLOR="#009900">'text'</FONT>):
	    kw[<FONT COLOR="#009900">'text'</FONT>] = name
	button = apply(self.createcomponent, (name,
		(), <FONT COLOR="#009900">'Button'</FONT>,
		Tkinter.Button, (frame,)), kw)
	button.pack(padx = self[<FONT COLOR="#009900">'ringpadx'</FONT>], pady = self[<FONT COLOR="#009900">'ringpady'</FONT>],
		fill = <FONT COLOR="#009900">'both'</FONT>, expand = 1)

	index = self.index(before, 1)
	horizontal = self[<FONT COLOR="#009900">'orient'</FONT>] == <FONT COLOR="#009900">'horizontal'</FONT>
	numButtons = len(self._buttonList)

	<FONT COLOR="#DD0000"># Shift buttons up one position.</FONT>
	for i in range(numButtons - 1, index - 1, -1):
	    widget = self._buttonList[i][2]
	    pos = i * 2 + 3
	    if horizontal:
		widget.grid(column = pos, row = 0)
	    else:
		widget.grid(column = 0, row = pos)

	<FONT COLOR="#DD0000"># Display the new button.</FONT>
	if horizontal:
	    frame.grid(column = index * 2 + 1, row = 0, sticky = <FONT COLOR="#009900">'ew'</FONT>,
		    padx = self[<FONT COLOR="#009900">'padx'</FONT>], pady = self[<FONT COLOR="#009900">'pady'</FONT>])
	    self._buttonBoxFrame.grid_columnconfigure(numButtons * 2 + 2, weight = 1)
	else:
	    frame.grid(column = 0, row = index * 2 + 1, sticky = <FONT COLOR="#009900">'ew'</FONT>,
		    padx = self[<FONT COLOR="#009900">'padx'</FONT>], pady = self[<FONT COLOR="#009900">'pady'</FONT>])
	    self._buttonBoxFrame.grid_rowconfigure(numButtons * 2 + 2, weight = 1)
	self._buttonList.insert(index, (name, button, frame))

	return button

<STRONG>    def add</STRONG>(self, name, **kw):
        return apply(self.insert, (name, len(self._buttonList)), kw)

<STRONG>    def delete</STRONG>(self, index):
        index = self.index(index)
	(name, widget, frame) = self._buttonList[index]
	frame.grid_forget()
	self.destroycomponent(name)

	numButtons = len(self._buttonList)

	<FONT COLOR="#DD0000"># Shift buttons down one position.</FONT>
	horizontal = self[<FONT COLOR="#009900">'orient'</FONT>] == <FONT COLOR="#009900">'horizontal'</FONT>
	for i in range(index + 1, numButtons):
	    frame = self._buttonList[i][2]
	    pos = i * 2 - 1
	    if horizontal:
		frame.grid(column = pos, row = 0)
	    else:
		frame.grid(column = 0, row = pos)

	if horizontal:
	    self._buttonBoxFrame.grid_columnconfigure(numButtons * 2 - 1,
		    minsize = 0)
	    self._buttonBoxFrame.grid_columnconfigure(numButtons * 2, weight = 0)
	else:
	    self._buttonBoxFrame.grid_rowconfigure(numButtons * 2, weight = 0)
	del self._buttonList[index]

<STRONG>    def setdefault</STRONG>(self, index):
	<FONT COLOR="#DD0000"># Turn off the default ring around the current default button.</FONT>
	if self._defaultButton is not None:
	    frame = self._buttonList[self._defaultButton][2]
	    frame.configure(relief = <FONT COLOR="#009900">'flat'</FONT>)
	    self._defaultButton = None

	<FONT COLOR="#DD0000"># Turn on the default ring around the new default button.</FONT>
	if index is not None:
	    index = self.index(index)
	    self._defaultButton = index
	    frame = self._buttonList[index][2]
	    frame.configure(relief = <FONT COLOR="#009900">'sunken'</FONT>)

<STRONG>    def invoke</STRONG>(self, index = <FONT COLOR="#009900">'default'</FONT>, noFlash = 0):
	<FONT COLOR="#DD0000"># Invoke the callback associated with the *index* button.  If</FONT>
	<FONT COLOR="#DD0000"># *noFlash* is not set, flash the button to indicate to the</FONT>
	<FONT COLOR="#DD0000"># user that something happened.</FONT>

	button = self._buttonList[self.index(index)][1]
	if not noFlash:
	    state = button.cget(<FONT COLOR="#009900">'state'</FONT>)
	    relief = button.cget(<FONT COLOR="#009900">'relief'</FONT>)
	    button.configure(state = <FONT COLOR="#009900">'active'</FONT>, relief = <FONT COLOR="#009900">'sunken'</FONT>)
	    self.update_idletasks()
	    self.after(100)
	    button.configure(state = state, relief = relief)
	return button.invoke()

<STRONG>    def alignbuttons</STRONG>(self, when = <FONT COLOR="#009900">'later'</FONT>):
	if when == <FONT COLOR="#009900">'later'</FONT>:
	    if not self._timerId:
		self._timerId = self.after_idle(self.alignbuttons, <FONT COLOR="#009900">'now'</FONT>)
	    return
	self.update_idletasks()
	self._timerId = None

	if self[<FONT COLOR="#009900">'orient'</FONT>] == <FONT COLOR="#009900">'horizontal'</FONT>:
	    <FONT COLOR="#DD0000"># Determine the width of the maximum length button.</FONT>
	    max = 0
	    for index in range(len(self._buttonList)):
		width = self._buttonBoxFrame.grid_bbox(index * 2 + 1, 0)[2]
		if width > max:
		    max = width

	    <FONT COLOR="#DD0000"># Set the widths of all the buttons to be the same.</FONT>
	    for index in range(len(self._buttonList)):
		self._buttonBoxFrame.grid_columnconfigure(index * 2 + 1,
			minsize = max)
	else:
	    <FONT COLOR="#DD0000"># Determine the width of the maximum length button.</FONT>
	    max = 0
	    for index in range(len(self._buttonList)):
		width = self._buttonBoxFrame.grid_bbox(0, index * 2 + 1)[2]
		if width > max:
		    max = width

	    <FONT COLOR="#DD0000"># Set the width of all the buttons to be the same.</FONT>
	    self._buttonBoxFrame.grid_columnconfigure(0, minsize = max)

</PRE>

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