On Mon, 2004-02-09 at 11:33, Graham Ashton wrote:
> Apologies for responding to my own message, but I found a way to achieve
> the same result...
Just to continue this monologue for a little longer, somebody requested
the code, so here it is...
--
Graham Ashton
class ChangeCellRenderer(gtk.GenericCellRenderer):
__gproperties__ = {
'variable': (gobject.TYPE_STRING, 'text', 'variable changed',
'', gobject.PARAM_READWRITE),
'reason': (gobject.TYPE_STRING, 'reason', 'reason for this change',
'', gobject.PARAM_READWRITE),
}
property_names = __gproperties__.keys()
def __init__(self):
self.__gobject_init__()
self.xpad = 3
self.ypad = 3
self.xalign = 0.0
self.yalign = 0.5
def __getattr__(self, name):
try:
return self.get_property(name)
except TypeError:
raise AttributeError
def __setattr__(self, name, value):
try:
self.set_property(name, value)
except TypeError:
self.__dict__[name] = value
def do_get_property(self, property):
if property.name not in self.property_names:
raise TypeError('No property named %s' % (property.name,))
return self.__dict__[property.name]
def do_set_property(self, property, value):
if property.name not in self.property_names:
raise TypeError('No property named %s' % (property.name,))
self.__dict__[property.name] = value
def on_render(self, window, widget, background_area,
cell_area, expose_area, flags):
x_offset, y_offset, width, height = self.on_get_size(widget, cell_area)
width -= self.xpad * 2
height -= self.ypad * 2
layout = pango.Layout(widget.get_pango_context())
list_store = widget.get_model()
if self.reason:
reason = ('<span size="smaller">%s</span>' % self.reason)
else:
reason = ('<span size="smaller" foreground="#0000cc">'
'<%s>'
'</span>' % 'Please assign a reason')
layout.set_markup('<span size="smaller" weight="bold">%s</span>\n%s' %
(self.variable, reason))
layout.set_width(-1) # turn off wrapping
widget.style.paint_layout(window, gtk.STATE_NORMAL, gtk.TRUE,
cell_area, widget, 'dummy',
cell_area.x + x_offset,
cell_area.y + y_offset,
layout)
def _get_row_height(self, widget):
layout = pango.Layout(widget.get_pango_context())
layout.set_markup('<span size="smaller">Line 1\nLine2</span>')
pango_scale = 1024 # available as pango.SCALE in more recent pygtk
return (layout.get_size()[1] / pango_scale) + (self.ypad * 2)
def on_get_size(self, widget, cell_area):
calc_width = 200 # randomly picked to be less than treeview width
calc_height = self._get_row_height(widget)
if cell_area:
y_offset = self.yalign * (cell_area.height - calc_height)
y_offset = max(y_offset, 0)
else:
y_offset = self.ypad
x_offset = self.xpad
y_offset = self.ypad
return x_offset, y_offset, calc_width, calc_height
gobject.type_register(ChangeCellRenderer)
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