Re: font size gtk_*_new_with_label

["Garth's KidStuff" <garthskidstuff gmail com>]

> I'm using
>
> gtk_widget_modify_font()  and
>
> style = gtk_rc_style_new();
> pango_font_description_free( style->font_desc );
> style->font_desc = pfont;
> gtk_widget_modify_style( widget, style );
>
> to change the font size of my labels, but I can't do it on created
> buttons with gtk_*_new_with_label() and neither in my statusbar.
>
> I couldn't find any example on the net. I understand that I dont have the
reference to the labels... , but when gtk refresh > the screen needs the
reference to the labels...
> So how to get the reference pointer or directly how to change the font size
on these objects ?
> I have custom labels with my widgets...
> Now, I'd rather change as less as possible the Glade code (Glade use
_with_label in generation code).
> I think that would be better using with_label than a custom button (I'm not
completetly sure about it on gtk).
> Could any body give me some help about this problem? I need to solve it
>
>
> Thanks in advance, Regards
> Luis

I wrote a short gtkmm method to scale the fontsize of various controls.
It's not complete (e.g. it doesn't do comboboxes, or entry widgets), but it
may answer your question.

ScaleWidgetFont(
    Gtk::Widget* pCtrl, // [in] Control to shrink the text of
    real scale) // [in] scale factor (should be < 1.0 to shrink control)
{
    // Different kinds of controls need different sub-objects' font resized
    Gtk::Frame* pFrame = dynamic_cast<Gtk::Frame*>(pCtrl);
    if (NULL != pFrame) // e.g. Frames have label widgets they use to
display their text
        pCtrl = pFrame->get_label_widget();
    else
    { // ...and radio buttons and check buttons are simply containers with a
single label child
        Gtk::Bin* pBin = dynamic_cast<Gtk::Bin*>(pCtrl);
        if (NULL != pBin)
            pCtrl = pBin->get_child();
    }

    Gtk::Label* pLabel = dynamic_cast<Gtk::Label*>(pCtrl);
    if (NULL != pLabel)
    { // If we have a label we can set its font
        Glib::RefPtr<Pango::Context> pPangoContext =
pLabel->get_pango_context();
        Pango::FontDescription fontD =
pPangoContext->get_font_description();
        fontD.set_size((int)(scale * fontD.get_size()));
        pLabel->modify_font(fontD);
    }
}

Cheers