# Based on iwidgets2.2.0/buttonbox.itk code.
import types
import Tkinter
import Pmw
class ButtonBox(Pmw.MegaWidget):
def __init__(self, parent = None, **kw):
# Define the megawidget options.
INITOPT = Pmw.INITOPT
optiondefs = (
('labelmargin', 0, INITOPT),
('labelpos', None, INITOPT),
('orient', 'horizontal', INITOPT),
('padx', 3, INITOPT),
('pady', 3, INITOPT),
)
self.defineoptions(kw, optiondefs, dynamicGroups = ('Button',))
# Initialise the base class (after defining the options).
Pmw.MegaWidget.__init__(self, parent)
# Create the components.
interior = self.interior()
if self['labelpos'] is None:
self._buttonBoxFrame = self._hull
columnOrRow = 0
else:
self._buttonBoxFrame = self.createcomponent('frame',
(), None,
Tkinter.Frame, (interior,))
self._buttonBoxFrame.grid(column=2, row=2, sticky='nsew')
columnOrRow = 2
self.createlabel(interior)
orient = self['orient']
if orient == 'horizontal':
interior.grid_columnconfigure(columnOrRow, weight = 1)
elif orient == 'vertical':
interior.grid_rowconfigure(columnOrRow, weight = 1)
else:
raise ValueError, 'bad orient option ' + repr(orient) + \
': must be either \'horizontal\' or \'vertical\''
# Initialise instance variables.
# List of tuples describing the buttons:
# - name
# - button widget
self._buttonList = []
# The index of the default button.
self._defaultButton = None
self._timerId = None
# Check keywords and initialise options.
self.initialiseoptions()
def destroy(self):
if self._timerId:
self.after_cancel(self._timerId)
self._timerId = None
Pmw.MegaWidget.destroy(self)
def numbuttons(self):
return len(self._buttonList)
def index(self, index, forInsert = 0):
listLength = len(self._buttonList)
if type(index) == types.IntType:
if forInsert and index <= listLength:
return index
elif not forInsert and index < listLength:
return index
else:
raise ValueError, 'index "%s" is out of range' % index
elif index is Pmw.END:
if forInsert:
return listLength
elif listLength > 0:
return listLength - 1
else:
raise ValueError, 'ButtonBox has no buttons'
elif index is Pmw.DEFAULT:
if self._defaultButton is not None:
return self._defaultButton
raise ValueError, 'ButtonBox has no default'
else:
names = map(lambda t: t[0], self._buttonList)
if index in names:
return names.index(index)
validValues = 'a name, a number, Pmw.END or Pmw.DEFAULT'
raise ValueError, \
'bad index "%s": must be %s' % (index, validValues)
def insert(self, componentName, beforeComponent = 0, **kw):
if componentName in self.components():
raise ValueError, 'button "%s" already exists' % componentName
if not kw.has_key('text'):
kw['text'] = componentName
kw['default'] = 'normal'
button = apply(self.createcomponent, (componentName,
(), 'Button',
Tkinter.Button, (self._buttonBoxFrame,)), kw)
index = self.index(beforeComponent, 1)
horizontal = self['orient'] == 'horizontal'
numButtons = len(self._buttonList)
# Shift buttons up one position.
for i in range(numButtons - 1, index - 1, -1):
widget = self._buttonList[i][1]
pos = i * 2 + 3
if horizontal:
widget.grid(column = pos, row = 0)
else:
widget.grid(column = 0, row = pos)
# Display the new button.
if horizontal:
button.grid(column = index * 2 + 1, row = 0, sticky = 'ew',
padx = self['padx'], pady = self['pady'])
self._buttonBoxFrame.grid_columnconfigure(
numButtons * 2 + 2, weight = 1)
else:
button.grid(column = 0, row = index * 2 + 1, sticky = 'ew',
padx = self['padx'], pady = self['pady'])
self._buttonBoxFrame.grid_rowconfigure(
numButtons * 2 + 2, weight = 1)
self._buttonList.insert(index, (componentName, button))
return button
def add(self, componentName, **kw):
return apply(self.insert, (componentName, len(self._buttonList)), kw)
def delete(self, index):
index = self.index(index)
(name, widget) = self._buttonList[index]
widget.grid_forget()
self.destroycomponent(name)
numButtons = len(self._buttonList)
# Shift buttons down one position.
horizontal = self['orient'] == 'horizontal'
for i in range(index + 1, numButtons):
widget = self._buttonList[i][1]
pos = i * 2 - 1
if horizontal:
widget.grid(column = pos, row = 0)
else:
widget.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]
def setdefault(self, index):
# Turn off the default ring around the current default button.
if self._defaultButton is not None:
button = self._buttonList[self._defaultButton][1]
button.configure(default = 'normal')
self._defaultButton = None
# Turn on the default ring around the new default button.
if index is not None:
index = self.index(index)
self._defaultButton = index
button = self._buttonList[index][1]
button.configure(default = 'active')
def invoke(self, index = Pmw.DEFAULT, noFlash = 0):
# Invoke the callback associated with the *index* button. If
# *noFlash* is not set, flash the button to indicate to the
# user that something happened.
button = self._buttonList[self.index(index)][1]
if not noFlash:
state = button.cget('state')
relief = button.cget('relief')
button.configure(state = 'active', relief = 'sunken')
self.update_idletasks()
self.after(100)
button.configure(state = state, relief = relief)
return button.invoke()
def button(self, buttonIndex):
return self._buttonList[self.index(buttonIndex)][1]
def alignbuttons(self, when = 'later'):
if when == 'later':
if not self._timerId:
self._timerId = self.after_idle(self.alignbuttons, 'now')
return
self.update_idletasks()
self._timerId = None
# Determine the width of the maximum length button.
max = 0
horizontal = (self['orient'] == 'horizontal')
for index in range(len(self._buttonList)):
gridIndex = index * 2 + 1
if horizontal:
width = self._buttonBoxFrame.grid_bbox(gridIndex, 0)[2]
else:
width = self._buttonBoxFrame.grid_bbox(0, gridIndex)[2]
if width > max:
max = width
# Set the width of all the buttons to be the same.
if horizontal:
for index in range(len(self._buttonList)):
self._buttonBoxFrame.grid_columnconfigure(index * 2 + 1,
minsize = max)
else:
self._buttonBoxFrame.grid_columnconfigure(0, minsize = max)
|