235 lines
7.3 KiB
Python
235 lines
7.3 KiB
Python
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import types
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import Tkinter
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import Pmw
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class RadioSelect(Pmw.MegaWidget):
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# A collection of several buttons. In single mode, only one
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# button may be selected. In multiple mode, any number of buttons
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# may be selected.
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def __init__(self, parent = None, **kw):
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# Define the megawidget options.
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INITOPT = Pmw.INITOPT
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optiondefs = (
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('buttontype', 'button', INITOPT),
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('command', None, None),
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('labelmargin', 0, INITOPT),
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('labelpos', None, INITOPT),
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('orient', 'horizontal', INITOPT),
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('padx', 5, INITOPT),
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('pady', 5, INITOPT),
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('selectmode', 'single', INITOPT),
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)
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self.defineoptions(kw, optiondefs, dynamicGroups = ('Button',))
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# Initialise the base class (after defining the options).
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Pmw.MegaWidget.__init__(self, parent)
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# Create the components.
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interior = self.interior()
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if self['labelpos'] is None:
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self._radioSelectFrame = self._hull
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else:
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self._radioSelectFrame = self.createcomponent('frame',
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(), None,
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Tkinter.Frame, (interior,))
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self._radioSelectFrame.grid(column=2, row=2, sticky='nsew')
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interior.grid_columnconfigure(2, weight=1)
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interior.grid_rowconfigure(2, weight=1)
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self.createlabel(interior)
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# Initialise instance variables.
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self._buttonList = []
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if self['selectmode'] == 'single':
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self._singleSelect = 1
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elif self['selectmode'] == 'multiple':
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self._singleSelect = 0
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else:
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raise ValueError, 'bad selectmode option "' + \
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self['selectmode'] + '": should be single or multiple'
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if self['buttontype'] == 'button':
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self.buttonClass = Tkinter.Button
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elif self['buttontype'] == 'radiobutton':
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self._singleSelect = 1
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self.var = Tkinter.StringVar()
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self.buttonClass = Tkinter.Radiobutton
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elif self['buttontype'] == 'checkbutton':
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self._singleSelect = 0
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self.buttonClass = Tkinter.Checkbutton
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else:
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raise ValueError, 'bad buttontype option "' + \
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self['buttontype'] + \
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'": should be button, radiobutton or checkbutton'
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if self._singleSelect:
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self.selection = None
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else:
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self.selection = []
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if self['orient'] not in ('horizontal', 'vertical'):
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raise ValueError, 'bad orient option ' + repr(self['orient']) + \
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': must be either \'horizontal\' or \'vertical\''
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# Check keywords and initialise options.
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self.initialiseoptions()
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def getcurselection(self):
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if self._singleSelect:
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return self.selection
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else:
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return tuple(self.selection)
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def getvalue(self):
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return self.getcurselection()
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def setvalue(self, textOrList):
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if self._singleSelect:
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self.__setSingleValue(textOrList)
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else:
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# Multiple selections
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oldselection = self.selection
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self.selection = textOrList
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for button in self._buttonList:
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if button in oldselection:
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if button not in self.selection:
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# button is currently selected but should not be
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widget = self.component(button)
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if self['buttontype'] == 'checkbutton':
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widget.deselect()
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else: # Button
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widget.configure(relief='raised')
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else:
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if button in self.selection:
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# button is not currently selected but should be
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widget = self.component(button)
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if self['buttontype'] == 'checkbutton':
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widget.select()
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else: # Button
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widget.configure(relief='sunken')
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def numbuttons(self):
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return len(self._buttonList)
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def index(self, index):
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# Return the integer index of the button with the given index.
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listLength = len(self._buttonList)
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if type(index) == types.IntType:
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if index < listLength:
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return index
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else:
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raise ValueError, 'index "%s" is out of range' % index
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elif index is Pmw.END:
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if listLength > 0:
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return listLength - 1
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else:
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raise ValueError, 'RadioSelect has no buttons'
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else:
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for count in range(listLength):
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name = self._buttonList[count]
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if index == name:
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return count
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validValues = 'a name, a number or Pmw.END'
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raise ValueError, \
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'bad index "%s": must be %s' % (index, validValues)
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def button(self, buttonIndex):
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name = self._buttonList[self.index(buttonIndex)]
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return self.component(name)
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def add(self, componentName, **kw):
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if componentName in self._buttonList:
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raise ValueError, 'button "%s" already exists' % componentName
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kw['command'] = \
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lambda self=self, name=componentName: self.invoke(name)
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if not kw.has_key('text'):
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kw['text'] = componentName
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if self['buttontype'] == 'radiobutton':
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if not kw.has_key('anchor'):
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kw['anchor'] = 'w'
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if not kw.has_key('variable'):
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kw['variable'] = self.var
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if not kw.has_key('value'):
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kw['value'] = kw['text']
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elif self['buttontype'] == 'checkbutton':
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if not kw.has_key('anchor'):
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kw['anchor'] = 'w'
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button = apply(self.createcomponent, (componentName,
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(), 'Button',
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self.buttonClass, (self._radioSelectFrame,)), kw)
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if self['orient'] == 'horizontal':
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self._radioSelectFrame.grid_rowconfigure(0, weight=1)
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col = len(self._buttonList)
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button.grid(column=col, row=0, padx = self['padx'],
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pady = self['pady'], sticky='nsew')
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self._radioSelectFrame.grid_columnconfigure(col, weight=1)
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else:
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self._radioSelectFrame.grid_columnconfigure(0, weight=1)
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row = len(self._buttonList)
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button.grid(column=0, row=row, padx = self['padx'],
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pady = self['pady'], sticky='ew')
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self._radioSelectFrame.grid_rowconfigure(row, weight=1)
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self._buttonList.append(componentName)
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return button
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def deleteall(self):
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for name in self._buttonList:
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self.destroycomponent(name)
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self._buttonList = []
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if self._singleSelect:
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self.selection = None
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else:
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self.selection = []
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def __setSingleValue(self, value):
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self.selection = value
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if self['buttontype'] == 'radiobutton':
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widget = self.component(value)
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widget.select()
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else: # Button
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for button in self._buttonList:
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widget = self.component(button)
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if button == value:
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widget.configure(relief='sunken')
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else:
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widget.configure(relief='raised')
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def invoke(self, index):
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index = self.index(index)
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name = self._buttonList[index]
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if self._singleSelect:
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self.__setSingleValue(name)
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command = self['command']
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if callable(command):
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return command(name)
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else:
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# Multiple selections
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widget = self.component(name)
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if name in self.selection:
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if self['buttontype'] == 'checkbutton':
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widget.deselect()
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else:
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widget.configure(relief='raised')
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self.selection.remove(name)
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state = 0
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else:
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if self['buttontype'] == 'checkbutton':
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widget.select()
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else:
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widget.configure(relief='sunken')
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self.selection.append(name)
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state = 1
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command = self['command']
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if callable(command):
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return command(name, state)
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