[pygtk] set_use_markup and gtk.Button

[John Finlay]

Art Hunkins wrote:
> I have been happily using the set_use_markup property of gtk.Label and 
> gtk.Frame with XML markup, to create bolded, italic and various sized text.
>
> I need to do this with gtk.Button as well - to do the same with (callback) 
> button labels. However, I've not been able. I've employed the two general 
> approaches below (with results immediately below them):
>
> #1:
>
> def cbbutton(self,box,callback,title=""):
>  """Creates a callbackbutton
>  box: parent box
>  callback: click callback
>  title: if given, the button name
>  returns the widget instance"""
>  self.cbbutts = self.cbbutts + 1
>  label = gtk.Label(title)
>  label.set_use_markup(True)
>  butt = gtk.Button(" %s " % label)
>  box.pack_start(butt, False, False, 5)
>  self.cbbuttons.append([butt,label,0])
>  butt.connect("clicked", callback)
>  butt.show()
>  return butt
>
> The above version runs fine, but gives unwanted button labels, of this 
> variety:
> <gtk.Label object a 0x[....] (GtkLabel at 0x[....different])>
>
>
> #2:
>
> def cbbutton(self,box,callback,title=""):
>  """Creates a callbackbutton
>  box: parent box
>  callback: click callback
>  title: if given, the button name
>  returns the widget instance"""
>  self.cbbutts = self.cbbutts + 1
>  label = gtk.Label()
>  label.set_markup(title)
>  butt = gtk.Button()
>  butt.child = label
>  label.show()
>  box.pack_start(butt, False, False, 5)
>  self.cbbuttons.append([butt,label,0])
>  butt.connect("clicked", callback)
>  butt.show()
>  return butt
>
> The above version crashes, with the following error log:
>
> /usr/lib/python2.6/site-packages/sugar/activity/main.py:35: GtkWarning:
> gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) ||
> GTK_IS_INVISIBLE (widget)' failed
> activity.show()
> Gtk:ERROR:gtkwidget.c:7967:gtk_widget_real_map: assertion failed:
> (GTK_WIDGET_REALIZED (widget))
>
> Can someone please suggest what changes might give me a proper label?
>
> FWIW, including XML tags in "title" makes no difference whatever in the 
> above results.
>
>   
How about:

butt = gtk.Button(title)
butt.child.set_use_markup(True)

John