Re: ComboBox(), again!

[José Alburquerque <jaalburquerque cox net>]

José Alburquerque wrote:
> Jamiil Abduqadir wrote:
> > It has been my intention to create a class that will simplify the 
> > inclusion of combo widgets in my programs, the class derives from 
> > 'Gtk::VBox' and then add to it a 'Gtk::ComboBoxEntryText', like this:
> >
> > ------ HPP FILE
> > // ALL THE INCLUDES ARE HERE //
> > namespace jme{
> > class Combo : virtual public Gtk::VBox{
> > private:
> >     virtual void Init();
> >     void Pack();
> >     Glib::ustring str;
> >     Gtk::Label* label;
> >     Gtk::ComboBoxEntryText* text_box;
> >
> > public:
> > //!Constructor
> >     Combo(Glib::ustring&);
> > //!Destructor
> >     virtual ~Combo();
> > };// Class
> > }// Namespace
> > #endif
> > ----- CPP FILE
> > void jme::Combo::Init() {
> >     // Instantiate object widgets
> >     label     = Gtk::manage(new Gtk::Label(str.data(), 
> > Gtk::ALIGN_LEFT ));
> >     if(label == NULL) {
> >         DO SOMETHING
> >     }
> >     text_box  = Gtk::manage(new Gtk::ComboBoxEntryText());
> >     if(text_box == NULL) {
> >         DO SOMETHING
> >     }
> >     this->pack_start(*label);
> >     this->pack_start(*text_box);
> >
> > }
> > jme::Combo::Combo(Glib:
> > :ustring& s) {
> >      ...
> >     str = s;
> >     this->Init();
> >    ...
> > }
> > jme::Combo::~Combo() { }
> >
> >
> > Later on another class I declare my hand dandy class (jme::Combo* 
> > entryboxFirstName;)   , then I  instantiate it like this 
> > 'entryboxFirstName  = Gtk::manage(new jme::Combo("sometext"));' to 
> > add it to a 'Gtk::Frame' (someFrame->pack_start(*entryboxFirstName);
> >
> > This works just fine, however, the size of the combo box is too high, 
> > high enough to fit two lines of text. Is this a normal behaviour in 
> > GTKmm?
> >
> > Please advice, thanks in advance.
>
> I would only say two things:  First, did you know that if you declare 
> your class members (for example your "label" above) as regular class 
> types instead of pointer types (in other words, "Gtk::Label label" 
> instead of "Gtk::Label* label") they are created and destroyed when 
> the class is also instantiated and then destroyed (you wouldn't need 
> to use manage)?  In the same way, if you declare your 
> entryboxFirstName as jme::Combo instead of jme::Combo* that class will 
> disappear automatically when the parent class disappears (if it's 
> member of a parent class).  You would need to use manage, however, 
> when the widget you're creating is not a member of a class.
>
> Second, I think you have to look into the different packing options 
> that containers have.  See for example the VBox docs, specially 
> pack_start() <cid:part1.00010608.05040203@cox.net> and pack_end() 
> <cid:part2.04010306.08010204@cox.net>.
> <cid:part1.00010608.05040203@cox.net>

Jonathon already answered and I didn't notice.  Sorry about the links, 
they're local.  Just look through the gktmm docs. :-)

-Jose
> > --
> > Happiness has many doors, and when one of them closes another opens, 
> > yet we spent so much time looking at the one that is shut that we 
> > don't  see the one that just  opened.
> > ------------------------------------------------------------------------
> >
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> >   


--
José Alburquerque
jaalburquerque cox net