import string
import sys
import types
import Tkinter
import Pmw
class Counter(Pmw.MegaWidget):
def __init__(self, parent = None, **kw):
# Define the megawidget options.
INITOPT = Pmw.INITOPT
optiondefs = (
('autorepeat', 1, None),
('buttonaspect', 1.0, INITOPT),
('datatype', 'numeric', self._datatype),
('increment', 1, None),
('initwait', 300, None),
('labelmargin', 0, INITOPT),
('labelpos', None, INITOPT),
('orient', 'horizontal', INITOPT),
('padx', 0, INITOPT),
('pady', 0, INITOPT),
('repeatrate', 50, None),
('sticky', 'ew', INITOPT),
)
self.defineoptions(kw, optiondefs)
# Initialise the base class (after defining the options).
Pmw.MegaWidget.__init__(self, parent)
# Initialise instance variables.
self._timerId = None
self._normalRelief = None
# Create the components.
interior = self.interior()
# If there is no label, put the arrows and the entry directly
# into the interior, otherwise create a frame for them. In
# either case the border around the arrows and the entry will
# be raised (but not around the label).
if self['labelpos'] is None:
frame = interior
if not kw.has_key('hull_relief'):
frame.configure(relief = 'raised')
if not kw.has_key('hull_borderwidth'):
frame.configure(borderwidth = 1)
else:
frame = self.createcomponent('frame',
(), None,
Tkinter.Frame, (interior,),
relief = 'raised', borderwidth = 1)
frame.grid(column=2, row=2, sticky=self['sticky'])
interior.grid_columnconfigure(2, weight=1)
interior.grid_rowconfigure(2, weight=1)
# Create the down arrow.
self._downArrowBtn = self.createcomponent('downarrow',
(), 'Arrow',
Tkinter.Canvas, (frame,),
width = 16, height = 16, relief = 'raised', borderwidth = 2)
# Create the entry field.
self._counterEntry = self.createcomponent('entryfield',
(('entry', 'entryfield_entry'),), None,
Pmw.EntryField, (frame,))
# Create the up arrow.
self._upArrowBtn = self.createcomponent('uparrow',
(), 'Arrow',
Tkinter.Canvas, (frame,),
width = 16, height = 16, relief = 'raised', borderwidth = 2)
padx = self['padx']
pady = self['pady']
orient = self['orient']
if orient == 'horizontal':
self._downArrowBtn.grid(column = 0, row = 0)
self._counterEntry.grid(column = 1, row = 0,
sticky = self['sticky'])
self._upArrowBtn.grid(column = 2, row = 0)
frame.grid_columnconfigure(1, weight = 1)
frame.grid_rowconfigure(0, weight = 1)
if Tkinter.TkVersion >= 4.2:
frame.grid_columnconfigure(0, pad = padx)
frame.grid_columnconfigure(2, pad = padx)
frame.grid_rowconfigure(0, pad = pady)
elif orient == 'vertical':
self._upArrowBtn.grid(column = 0, row = 0, sticky = 's')
self._counterEntry.grid(column = 0, row = 1,
sticky = self['sticky'])
self._downArrowBtn.grid(column = 0, row = 2, sticky = 'n')
frame.grid_columnconfigure(0, weight = 1)
frame.grid_rowconfigure(0, weight = 1)
frame.grid_rowconfigure(2, weight = 1)
if Tkinter.TkVersion >= 4.2:
frame.grid_rowconfigure(0, pad = pady)
frame.grid_rowconfigure(2, pad = pady)
frame.grid_columnconfigure(0, pad = padx)
else:
raise ValueError, 'bad orient option ' + repr(orient) + \
': must be either \'horizontal\' or \'vertical\''
self.createlabel(interior)
self._upArrowBtn.bind('<Configure>', self._drawUpArrow)
self._upArrowBtn.bind('<1>', self._countUp)
self._upArrowBtn.bind('<Any-ButtonRelease-1>', self._stopCounting)
self._downArrowBtn.bind('<Configure>', self._drawDownArrow)
self._downArrowBtn.bind('<1>', self._countDown)
self._downArrowBtn.bind('<Any-ButtonRelease-1>', self._stopCounting)
self._counterEntry.bind('<Configure>', self._resizeArrow)
entry = self._counterEntry.component('entry')
entry.bind('<Down>', lambda event, s = self: s._key_decrement(event))
entry.bind('<Up>', lambda event, s = self: s._key_increment(event))
# Need to cancel the timer if an arrow button is unmapped (eg:
# its toplevel window is withdrawn) while the mouse button is
# held down. The canvas will not get the ButtonRelease event
# if it is not mapped, since the implicit grab is cancelled.
self._upArrowBtn.bind('<Unmap>', self._stopCounting)
self._downArrowBtn.bind('<Unmap>', self._stopCounting)
# Check keywords and initialise options.
self.initialiseoptions()
def _resizeArrow(self, event):
for btn in (self._upArrowBtn, self._downArrowBtn):
bw = (string.atoi(btn['borderwidth']) +
string.atoi(btn['highlightthickness']))
newHeight = self._counterEntry.winfo_reqheight() - 2 * bw
newWidth = int(newHeight * self['buttonaspect'])
btn.configure(width=newWidth, height=newHeight)
self._drawArrow(btn)
def _drawUpArrow(self, event):
self._drawArrow(self._upArrowBtn)
def _drawDownArrow(self, event):
self._drawArrow(self._downArrowBtn)
def _drawArrow(self, arrow):
if self['orient'] == 'vertical':
if arrow == self._upArrowBtn:
direction = 'up'
else:
direction = 'down'
else:
if arrow == self._upArrowBtn:
direction = 'right'
else:
direction = 'left'
Pmw.drawarrow(arrow, self['entry_foreground'], direction, 'arrow')
def _stopCounting(self, event = None):
if self._timerId is not None:
self.after_cancel(self._timerId)
self._timerId = None
if self._normalRelief is not None:
button, relief = self._normalRelief
button.configure(relief=relief)
self._normalRelief = None
def _countUp(self, event):
self._normalRelief = (self._upArrowBtn, self._upArrowBtn.cget('relief'))
self._upArrowBtn.configure(relief='sunken')
# Force arrow down (it may come up immediately, if increment fails).
self._upArrowBtn.update_idletasks()
self._count(1, 1)
def _countDown(self, event):
self._normalRelief = (self._downArrowBtn, self._downArrowBtn.cget('relief'))
self._downArrowBtn.configure(relief='sunken')
# Force arrow down (it may come up immediately, if increment fails).
self._downArrowBtn.update_idletasks()
self._count(-1, 1)
def increment(self):
self._forceCount(1)
def decrement(self):
self._forceCount(-1)
def _key_increment(self, event):
self._forceCount(1)
self.update_idletasks()
def _key_decrement(self, event):
self._forceCount(-1)
self.update_idletasks()
def _datatype(self):
datatype = self['datatype']
if type(datatype) is types.DictionaryType:
self._counterArgs = datatype.copy()
if self._counterArgs.has_key('counter'):
datatype = self._counterArgs['counter']
del self._counterArgs['counter']
else:
datatype = 'numeric'
else:
self._counterArgs = {}
if _counterCommands.has_key(datatype):
self._counterCommand = _counterCommands[datatype]
elif callable(datatype):
self._counterCommand = datatype
else:
validValues = _counterCommands.keys()
validValues.sort()
raise ValueError, ('bad datatype value "%s": must be a' +
' function or one of %s') % (datatype, validValues)
def _forceCount(self, factor):
if not self.valid():
self.bell()
return
text = self._counterEntry.get()
try:
value = apply(self._counterCommand,
(text, factor, self['increment']), self._counterArgs)
except ValueError:
self.bell()
return
previousICursor = self._counterEntry.index('insert')
if self._counterEntry.setentry(value) == Pmw.OK:
self._counterEntry.xview('end')
self._counterEntry.icursor(previousICursor)
def _count(self, factor, first):
if not self.valid():
self.bell()
return
self._timerId = None
origtext = self._counterEntry.get()
try:
value = apply(self._counterCommand,
(origtext, factor, self['increment']), self._counterArgs)
except ValueError:
# If text is invalid, stop counting.
self._stopCounting()
self.bell()
return
# If incrementing produces an invalid value, restore previous
# text and stop counting.
previousICursor = self._counterEntry.index('insert')
valid = self._counterEntry.setentry(value)
if valid != Pmw.OK:
self._stopCounting()
self._counterEntry.setentry(origtext)
if valid == Pmw.PARTIAL:
self.bell()
return
self._counterEntry.xview('end')
self._counterEntry.icursor(previousICursor)
if self['autorepeat']:
if first:
delay = self['initwait']
else:
delay = self['repeatrate']
self._timerId = self.after(delay,
lambda self=self, factor=factor: self._count(factor, 0))
def destroy(self):
self._stopCounting()
Pmw.MegaWidget.destroy(self)
Pmw.forwardmethods(Counter, Pmw.EntryField, '_counterEntry')
def _changeNumber(text, factor, increment):
value = string.atol(text)
if factor > 0:
value = (value / increment) * increment + increment
else:
value = ((value - 1) / increment) * increment
# Get rid of the 'L' at the end of longs (in python up to 1.5.2).
rtn = str(value)
if rtn[-1] == 'L':
return rtn[:-1]
else:
return rtn
def _changeReal(text, factor, increment, separator = '.'):
value = Pmw.stringtoreal(text, separator)
div = value / increment
# Compare reals using str() to avoid problems caused by binary
# numbers being only approximations to decimal numbers.
# For example, if value is -0.3 and increment is 0.1, then
# int(value/increment) = -2, not -3 as one would expect.
if str(div)[-2:] == '.0':
# value is an even multiple of increment.
div = round(div) + factor
else:
# value is not an even multiple of increment.
div = int(div) * 1.0
if value < 0:
div = div - 1
if factor > 0:
div = (div + 1)
value = div * increment
text = str(value)
if separator != '.':
index = string.find(text, '.')
if index >= 0:
text = text[:index] + separator + text[index + 1:]
return text
def _changeDate(value, factor, increment, format = 'ymd',
separator = '/', yyyy = 0):
jdn = Pmw.datestringtojdn(value, format, separator) + factor * increment
y, m, d = Pmw.jdntoymd(jdn)
result = ''
for index in range(3):
if index > 0:
result = result + separator
f = format[index]
if f == 'y':
if yyyy:
result = result + '%02d' % y
else:
result = result + '%02d' % (y % 100)
elif f == 'm':
result = result + '%02d' % m
elif f == 'd':
result = result + '%02d' % d
return result
_SECSPERDAY = 24 * 60 * 60
def _changeTime(value, factor, increment, separator = ':', time24 = 0):
unixTime = Pmw.timestringtoseconds(value, separator)
if factor > 0:
chunks = unixTime / increment + 1
else:
chunks = (unixTime - 1) / increment
unixTime = chunks * increment
if time24:
while unixTime < 0:
unixTime = unixTime + _SECSPERDAY
while unixTime >= _SECSPERDAY:
unixTime = unixTime - _SECSPERDAY
if unixTime < 0:
unixTime = -unixTime
sign = '-'
else:
sign = ''
secs = unixTime % 60
unixTime = unixTime / 60
mins = unixTime % 60
hours = unixTime / 60
return '%s%02d%s%02d%s%02d' % (sign, hours, separator, mins, separator, secs)
# hexadecimal, alphabetic, alphanumeric not implemented
_counterCommands = {
'numeric' : _changeNumber, # } integer
'integer' : _changeNumber, # } these two use the same function
'real' : _changeReal, # real number
'time' : _changeTime,
'date' : _changeDate,
}
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