Re: Adding widget inside a Gtk::Frame

[Marcus Lundblad <ml Update UU SE>]

On Mon, 15 Aug 2005, Nickolai Dobrynin wrote:

> Marcus,
>
> May I ask you a question back?  Are you using this constructor to create
> your desk_widget object:
>
> desk_widget::desk_widget(const std::string& name)
> {
>  desk_widget::desk_widget();
>  set_name(name);
> }
>
> If so, I must wonder what you intend this constructor to do.  The first
> line creates a default desk_widget object, and, since this object is anonimous,
> it goes immediately out of scope.  So, in effect, you create a desk_widget
> object inside another desk_widget object.  Is this intentional?
>
> Given this, nothing gets added to your frame in that particular constructor,
> so nothing, indeed, should show up except for the frame itself.  Please try
> using the first constructor instead and let us know if it works.  That other
> constructor looks OK to me, at first glance anyway.
Well, ofcourse your right, works like a charm.

> One last thing.  What is the purpose for having show_all() in desk_widget::set_name?
> Is it meant to be there?
Mostly to see if this helped, I guess a bit desperate.

> To sum things up, this is more of a C++ problem than anything GTK-related.
Actually I did quite much C++ coding a few years back, but since I 
started my present job, I haven't gotten around to much spare-time coding, 
so I guess I'm a bit rusty.
Besides Java and XSLT at work, it has mostly been C coding (fvwm).
But this vacation I got the idea to start using GTKmm, thought about it 
some years ago...

Thanks for your help.

//Marcus

> Best,
>
> Nickolai
>
>
>
> On Mon, Aug 15, 2005 at 06:49:38PM +0200, Marcus Lundblad wrote:
> > I have some problem with a widget derived from Gtk::Frame
> >
> > I have the following (header and source):
> >
> > ------- .hh ----------------------------------------
> >
> > #include <gtkmm.h>
> > #include <string>
> >
> > #ifndef DESK_WIDGET
> > #define DESK_WIDGET
> >
> > class desk_widget : public Gtk::Frame {
> > public:
> >   desk_widget();
> >   desk_widget(const std::string& name);
> >
> >   void set_name(const std::string& name);
> >
> > private:
> >   Gtk::VBox desk_box;    // holds label area and graphic area
> >   Gtk::HBox label_box;   // holds desk indicator and desk label
> >   Gtk::DrawingArea desk_indicator; //
> >   Gtk::Label label;  // the desktop name label
> >   Gtk::Button desk;  // will become a special widget later on...
> > };
> >
> > #endif //DESK_WIDGET
> >
> > --------- .cc -----------------------------------------
> >
> > #include <iostream>
> > #include "desk_widget.hh"
> >
> > desk_widget::desk_widget()
> > {
> >   add(desk_box);
> >   label_box.pack_start(desk_indicator, Gtk::PACK_SHRINK);
> >   label_box.pack_end(label, Gtk::PACK_SHRINK);
> >   desk_box.pack_start(label_box, Gtk::PACK_SHRINK);
> >   desk_box.pack_end(desk, Gtk::PACK_SHRINK);
> >
> >   label.set_label("Desk");
> >   desk.set_label("Test");
> >   show_all();
> > }
> >
> > desk_widget::desk_widget(const std::string& name)
> > {
> >   desk_widget::desk_widget();
> >   set_name(name);
> > }
> >
> > void
> > desk_widget::set_name(const std::string& name)
> > {
> >   std::cerr << "Setting desk label: " << name << std::endl;
> >   label.set_label(name);
> >   show_all();
> > }
> >
> > -----------------------------------------------------------------
> >
> > but only the frame shows up.
> > Do I need to add the outermost box as a managed widget? Or is something
> > else dodgy? To me it seems this should work.
> >
> > Would be thankful if someone has an idea of what's wrong...
> >
> > //Marcus
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