Re: [API 2.4] font in entry

[Kjell Ahlstedt <kjell ahlstedt bredband net>]

I started from the entry/simple example in the gtkmm tutorial, 
http://git.gnome.org/browse/gtkmm-documentation/tree/examples/book/entry/simple, 
and added

class MyEntry : public Gtk::Entry
{
public:
  MyEntry();

protected:
  //Signal handlers.
  void on_my_map();
};

#define SET_FONT_IN_CONSTRUCTOR 1

MyEntry::MyEntry()
{
#if SET_FONT_IN_CONSTRUCTOR
  std::cout << "Setting font in constructor" << std::endl;
  Pango::FontDescription fd(get_style_context()->get_font());
  fd.set_family("times");
  fd.set_style(Pango::STYLE_ITALIC);
  override_font(fd);
#endif
  signal_map().connect(sigc::mem_fun(*this, &MyEntry::on_my_map));
}

void MyEntry::on_my_map()
{
#if !SET_FONT_IN_CONSTRUCTOR
  std::cout << "Setting font in on_my_map()" << std::endl;
  Pango::FontDescription fd(get_style_context()->get_font());
  fd.set_family("times");
  fd.set_style(Pango::STYLE_ITALIC);
  override_font(fd);
#endif
}

It sets the font either in the constructor or in the map signal handler. 
Both alternatives work.

This is gtkmm 3. If you need code for gtkmm 2, and you can't figure out 
yourself how to change my code for gtkmm 2, I can probably help you with 
that.

Kjell

2012-11-07 11:10, Yann Leydier skrev:
> Here is some information to add to the subject: connecting my function 
> to signal size-request or size-allocate works when the signal is 
> called for the second time.
>
> This solution is unsatisfying as the signal is emitted quite often and 
> it isn't easy to disconnect the signal only when not needed anymore.
>
> yann
>
> On 07/11/12 09:33, Yann Leydier wrote:
> > Connecting the realize signal does not work any better than map and
> > map-event. :o(
> >
> > According to this page, the realize signal is emitted even before map :
> > http://blog.yorba.org/jim/2010/10/those-realize-map-widget-signals.html
> >
> > Other ideas?
> >
> > Thanks,
> > yann
> >
> > On 06/11/12 21:32, José Alburquerque wrote:
> > > On Tue, 2012-11-06 at 18:09 +0100, Yann Leydier wrote:
> > > > Hullo,
> > > >
> > > > I'm trying to change the font (face and style) in a custom object
> > > > derived from Entry.
> > > >
> > > > I use the following code:
> > > >     Pango::FontDescription
> > > > fd(get_layout()->get_context()->get_font_description());
> > > >     if (word.HasSerif())
> > > >         fd.set_family("times");
> > > >     else
> > > >         fd.set_family("arial");
> > > >     if (word.IsItalics())
> > > >         fd.set_style(Pango::STYLE_ITALIC);
> > > >     else
> > > >         fd.set_style(Pango::STYLE_NORMAL);
> > > > get_layout()->get_context()->set_font_description(fd);
> > > >
> > > >
> > > > This seems to need the widget to be associated to a fully functionnal
> > > > GdkWidow, so rather than putting this code in the constructor, I
> > > > connected it to a signal.
> > > >
> > > > I tried map and map-event but it did not work. I thought that these
> > > > signals where emitted when (resp.) asking to associate and associating
> > > > the widget to a GdkWindow…
> > > >
> > > > I also tried expose-event, which is supposed to be emitted when the
> > > > widget is rendered, and it changes the font only when the edit gets 
> > > > the
> > > > focus! O_O
> > > >
> > > > Do you have any insight on the matter, please?
> > >
> > > You can use the Gtk::Widget::signal_realize().  When it is emitted, the
> > > Gdk::Window associated with the widget should be fully functional.
> > >
> > > > yann