Hello everybody,
I am new to wxpython, have bought and am reading the book, but
seem to have been thrown in the deep end a bit as I am making an
editor to embed in another application.
As I am still working my way through the book, please excuse
my ignorance. I have been trolling google and the mailing
list archives before posting (this is the first of a few).
I have a choice that displays available font names.
This is the call to create the widget:
FontWidget('fontchoice', frame=self,
handler=self.OnFont, update=self.OnUpdateFont),
Here are the classes themselves. Please excuse the mess, this needs
a lot of refactoring, as I thought I would be using more ListWidgets.:
class ListWidget(object):
def __init__(self, name, items=[], handler=None):
self.name = name
self.items = items
self.handler = handler
def add(self, bar, initselect = None):
id = wx.NewId()
choice = wx.Choice(bar, id, choices=self.items)
choice.name = self.name
if self.handler is not None:
bar.Bind(wx.EVT_CHOICE, self.handler, choice)
if self.update is not None:
choice.Bind(wx.EVT_UPDATE_UI, self.update, choice)
if initselect is not None:
choice.SetStringSelection(initselect)
bar.AddControl(choice)
return bar
def EvtChoice(self, event):
pprint(dir(event))
class FontWidget(ListWidget):
# This needs to use another widget that allows font sensitive text
def __init__(self, name, frame, handler=None, update=None):
self.name = name
self.frame = frame
f = wx.FontEnumerator()
f.EnumerateFacenames()
self.items = f.GetFacenames()
self.handler = handler
self.update = update
def add(self, bar):
# get the current font set.
attr = self.frame.GetCurStyle(self.frame.rtc)
name = attr.GetFont().GetFaceName()
return ListWidget.add(self, bar, initselect=name)
If I do this alone without binding the event, or binding it to
something that does nothing the choice widget updates the selection,
but with this as the binding:
def OnFont(self, event):
""" Grab the value for the font from the selection list, and if
it is a selection set the selected text to that font, if there
is no selection, start using the chosen font"""
choice = event.GetEventObject()
newfacename = choice.GetStringSelection()
attr = self.GetCurStyle(self.rtc)
if attr:
curfont = attr.GetFont()
curfont.SetFaceName(newfacename)
attr.SetFont(curfont)
self.ApplyNewStyle(self.rtc, attr)
choice.SetStringSelection(newfacename)
self.rtc.Refresh()
event.Skip()
def OnUpdateFont(self, event):
""" Check what the current font that the cursor is on is, and if
it has changed, change the value in the fontlist to reflect the
current font"""
attr = self.GetCurStyle(self.rtc)
if attr:
facename = attr.GetFont().GetFaceName()
event.GetEventObject().SetStringSelection(facename)
What now happens is that the choice does not update until I move the
cursor. At which point it displays the correct setting, but this is
terrible UI, because it makes you think that the selection is not
taking for some reason, in fact it is so disconcerting that it catches
me out, and I am the one debugging the problem!
I am very new to wxPython and its objects etc. so any constructive
criticism would also be appreciated. 
Thanks in advance for helping.
Rohan
