Re: Adding widget inside a Gtk::Frame

[Nickolai Dobrynin <dobrynin cs uwm edu>]

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.

One last thing.  What is the purpose for having show_all() in desk_widget::set_name?
Is it meant to be there?

To sum things up, this is more of a C++ problem than anything GTK-related.


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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