2008/4/25, Joern Koerner <[EMAIL PROTECTED]>:
> Hi!
>
> I've a small problem with Overlay.
> I want to create a "caption" for a LineBox that contains a listbox with an
> overlay. Just a small simple text that sits around the top left corner and
> does nothing.
For my project I've created a separate widget - linebox with title,
based on LineBox:
class Border(urwid.WidgetWrap):
def __init__(self, widget, title=None, attr=None):
"""
Draw a line border around widget and set up a title
@param widget: Widget to wrap
@param title: (title, attribute) tuple or basestring
@type title: urwid.Text object
@param attr: Attribute of border
"""
utf8decode = urwid.escape.utf8decode
_title = None
if title is not None:
if isinstance(title, tuple):
_len = len(title[0])
_title = urwid.Text((title[1], " %s " % title[0]), "center")
elif isinstance(title, basestring):
_len = len(title)
_title = urwid.Text(title, "center")
else:
raise UIError("Invalid title type %s. "\
"Tuple or basetring expected" % type(_title))
_len += 2 # " _text "
self.attr = attr
self.tline = self._attr(urwid.Divider(utf8decode("─")))
self.bline = self._attr(urwid.Divider(utf8decode("─")))
self.lline = self._attr(urwid.SolidFill(utf8decode("│")))
self.rline = self._attr(urwid.SolidFill(utf8decode("│")))
self.tlcorner = self._attr(urwid.Text(utf8decode("┌")))
self.trcorner = self._attr(urwid.Text(utf8decode("┐")))
self.blcorner = self._attr(urwid.Text(utf8decode("└")))
self.brcorner = self._attr(urwid.Text(utf8decode("┘")))
tline_widgets = [('fixed', 1, self.tlcorner), self.tline]
if title is not None:
tline_widgets.append(("fixed", _len, _title))
tline_widgets.extend([self.tline, ("fixed", 1, self.trcorner)])
self.top = urwid.Columns(tline_widgets)
self.middle = urwid.Columns([('fixed', 1, self.lline),
widget, ('fixed', 1, self.rline)],
box_columns=[0,2], focus_column=1)
self.bottom = urwid.Columns([('fixed', 1, self.blcorner),
self.bline, ('fixed', 1, self.brcorner)])
self.pile = urwid.Pile([('flow',self.top), self.middle,
('flow', self.bottom)], focus_item=1)
super(Border, self).__init__(self.pile)
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
def _attr(self, widget):
if self.attr is None:
return widget
return urwid.AttrWrap(widget, self.attr)
May be it would be useful.
--
~syhpoon
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