On 2 Jan 2011, at 21:00, jcup...@gmail.com wrote: > On 2 January 2011 15:39, John Emmas <john...@tiscali.co.uk> wrote: >> To be honest, all I'm trying to do is create a button whose label font can >> be changed on demand. I've managed to achieve it by using an empty button >> with a label on top, except that the label doesn't always stay on top! > > Ah, OK, yes, there's a much simpler technique. > > Try something like this: > > txt = "some text to display"; > font = "sans 12"; > > snprintf (button_text, 256, > "<span font_desc=\"%s\" size=\"medium\">%s</span>", > font, txt); > gtk_label_set_markup ( > GTK_LABEL (gtk_bin_get_child (GTK_BIN (button))), > button_text); > > Assuming 'button' is a regular gtk button containing a label. >
Thanks for the suggestion John. I needed to modify your code slightly because strictly speaking, I'm using gtkmm rather than gtk+ but the basic technique worked. In fact, once I realised that I could obtain a pointer to the button's label object, I found that I could simply call Gtk::Label_modify_font() to modify the font too (assuming I had a suitable Pango::FontDescription object). The best thing though is that I managed to get rid of my clumsy composite widget, so I now have a button whose font can be changed on demand PLUS the button's label is always visible, exactly as it's supposed to be! So success all round, I'd say! However, there's a minor problem with both strategies.... Although I can now change the button's label font, the new font seems to be quite transitory and certain operations seem to reset it. For example if (later) I change the label's text (e.g. if it currently says "This message" and I change it to say "That message") the font will immediately revert back to whatever it was when the button got created. I could get around this by maintaining a persistent object somewhere that described the last font that I set but it would be neater and more intelligent if I could "get" the label's current font (immediately prior to changing its text) and then "set" it back to what it should be. And therein lies the problem.... I can't see any obvious method of retrieving a widget's current font. gtk_widget_modify_font() allows me to set a new font but it doesn't return anything that would describe the widget's previous font. Nor does there seem to be any other way of retrieving a widget's current font AFAICT. Am I missing something obvious? John _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
