Re: About Gtk::Bin?

[Simon Fuhrmann <simonfuhrmann gmx de>]

Hi Robert,

yes, I changed the code a bit, but with no affect. There seems to be a
bug with Gtk::Bin or a reason I don't know. Here is a simplest-possible
testcase that confirms that it does not work (at least for me and Zhu):


#include <gtkmm.h>

class MyBin : public Gtk::Bin
{
  public:
    MyBin (void)
    { add(*Gtk::manage(new Gtk::Button("My Button"))); }
};

int
main (int argc, char** argv)
{
  Gtk::Main kit(argc, argv);
  Gtk::Window win;
  win.add(*Gtk::manage(new MyBin));
  win.show_all();
  kit.run(win);
  return 0;
}


Robert Pearce wrote:
> Hi Simon,
> 
> On Sat, 13 Dec 2008 15:54:13 +0100 you wrote:
>> Actually, I have no idea why it does not work. Seems to be a problem
>> with the Gtk::Bin. I replaced it with a Box and it worked.
>>
> 
> I've seen one change between your two posted versions that would explain it. In the working one you have:
> 
>> class Window : public Gtk::Window
>> {
>>   public:
>>     Window()
>>     {
>>       add(viewer_);
>>       show_all();
>>     }
>> };
> 
> Whereas the original had:
> 
>>>>> class Window:public Gtk::Window
>>>>> {
>>>>> public:
>>>>>     Window(){
>>>>>         add(viewer_);
>>>>>         viewer_.show();
>>>>>     }
>>>>> };
> 
> Comparing these extracts you'll note that the original only showed the viewer, and not the window itself, while the new version shows "all", meaning the window and all its children.
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