144 lines
4.3 KiB
Python
144 lines
4.3 KiB
Python
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# Class to display messages in an information line.
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import string
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import Tkinter
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import Pmw
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class MessageBar(Pmw.MegaWidget):
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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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defaultMessageTypes = {
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# (priority, showtime, bells, logmessage)
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'systemerror' : (5, 10, 2, 1),
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'usererror' : (4, 5, 1, 0),
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'busy' : (3, 0, 0, 0),
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'systemevent' : (2, 5, 0, 0),
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'userevent' : (2, 5, 0, 0),
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'help' : (1, 5, 0, 0),
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'state' : (0, 0, 0, 0),
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}
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optiondefs = (
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('labelmargin', 0, INITOPT),
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('labelpos', None, INITOPT),
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('messagetypes', defaultMessageTypes, INITOPT),
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('silent', 0, None),
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('sticky', 'ew', INITOPT),
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)
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self.defineoptions(kw, optiondefs)
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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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self._messageBarEntry = self.createcomponent('entry',
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(), None,
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Tkinter.Entry, (interior,))
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# Can't always use 'disabled', since this greys out text in Tk 8.4.2
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try:
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self._messageBarEntry.configure(state = 'readonly')
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except Tkinter.TclError:
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self._messageBarEntry.configure(state = 'disabled')
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self._messageBarEntry.grid(column=2, row=2, sticky=self['sticky'])
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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._numPriorities = 0
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for info in self['messagetypes'].values():
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if self._numPriorities < info[0]:
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self._numPriorities = info[0]
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self._numPriorities = self._numPriorities + 1
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self._timer = [None] * self._numPriorities
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self._messagetext = [''] * self._numPriorities
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self._activemessage = [0] * self._numPriorities
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# Check keywords and initialise options.
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self.initialiseoptions()
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def destroy(self):
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for timerId in self._timer:
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if timerId is not None:
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self.after_cancel(timerId)
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self._timer = [None] * self._numPriorities
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Pmw.MegaWidget.destroy(self)
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def message(self, type, text):
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# Display a message in the message bar.
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(priority, showtime, bells, logmessage) = self['messagetypes'][type]
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if not self['silent']:
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for i in range(bells):
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if i != 0:
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self.after(100)
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self.bell()
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self._activemessage[priority] = 1
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if text is None:
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text = ''
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self._messagetext[priority] = string.replace(text, '\n', ' ')
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self._redisplayInfoMessage()
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if logmessage:
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# Should log this text to a text widget.
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pass
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if showtime > 0:
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if self._timer[priority] is not None:
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self.after_cancel(self._timer[priority])
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# Define a callback to clear this message after a time.
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def _clearmessage(self=self, priority=priority):
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self._clearActivemessage(priority)
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mseconds = int(showtime * 1000)
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self._timer[priority] = self.after(mseconds, _clearmessage)
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def helpmessage(self, text):
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if text is None:
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self.resetmessages('help')
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else:
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self.message('help', text)
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def resetmessages(self, type):
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priority = self['messagetypes'][type][0]
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self._clearActivemessage(priority)
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for messagetype, info in self['messagetypes'].items():
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thisPriority = info[0]
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showtime = info[1]
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if thisPriority < priority and showtime != 0:
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self._clearActivemessage(thisPriority)
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def _clearActivemessage(self, priority):
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self._activemessage[priority] = 0
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if self._timer[priority] is not None:
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self.after_cancel(self._timer[priority])
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self._timer[priority] = None
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self._redisplayInfoMessage()
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def _redisplayInfoMessage(self):
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text = ''
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for priority in range(self._numPriorities - 1, -1, -1):
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if self._activemessage[priority]:
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text = self._messagetext[priority]
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break
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self._messageBarEntry.configure(state = 'normal')
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self._messageBarEntry.delete(0, 'end')
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self._messageBarEntry.insert('end', text)
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# Can't always use 'disabled', since this greys out text in Tk 8.4.2
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try:
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self._messageBarEntry.configure(state = 'readonly')
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except Tkinter.TclError:
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self._messageBarEntry.configure(state = 'disabled')
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Pmw.forwardmethods(MessageBar, Tkinter.Entry, '_messageBarEntry')
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