Re: Pango::Layout text within Gtk::Entry

[Bob Caryl <bob fis-cal com>]

Erdem Gokhan YILMAZ wrote:

> Hi,
>
> I have been looking around for a solution to my problem of ,
> Displaying a text which has markup on it (Pango::Layout::set_markup) 
> within Gtk::Entry()
> but couldnt find one.
>
> I have tried the following within a   ----->  class ventry:public 
> Gtk::Entry()
> ...
> this->get_layout()->set_markup(markup);
> ...
>
>
> which doesn't work :( but the same logic and the same markup works 
> quite well for a Gtk::Label()
>
>
> ...
> Gtk::Label *x=new Gtk::Label();
> x->set_markup(markup); ...
>
>  I will appreciate any working C++ example or an idea :)
> Thanks in advance.
>
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Hi Erdem,

I think your problem in trying to use set_markup for a Gtk::Entry in a 
way analogous to how it is used in Gtk::Label is that the label text is 
static compared to that Gtk::Entry text.  So, to use the 
Gtk::Pango::Layout::set_markup function for Gtk::Entry text requires 
that you do it in a dynamic way.  Using Gtk::PangoLayout::set_markup 
works for me this way:

Gtk::Entry *entry = manage(new Gtk::Entry);
entry->signal_key_release_event().connect(sigc::mem_fun(*this,&Test::my_callback_function));   
// connect a callback function to dynamically get access to the 
Gtk::Entry text

The callback function looks something like this:

void Test::my_callback_function(void)
{
   Glib::ustring str = "<big>";   // these lines create a marked up 
version of the text in the Gtk::Entry
   str += entry->get_text();
   str += "</big>";
   entry->get_layout()->set_markup(str);   // dynamically replace the 
Gtk::Entry text with the marked up version
}

Then the text in the entry appears as <big> after each time a character 
is typed in by the user.  This method is rather clunky though..   I 
would recommend using Gtk::Pango::Layout::set_attributes instead.

Best regards,
Bob Caryl