ComboBox/ComboBoxEntry don't inherit from CellEditable

[Karthik Ganesan]

Hi,
Shouldn't ComboBox/ComboBoxEntry inherit from CellEditable : The 
following program verifies it (dynamic casting to CellEditable returns 
NULL pointers).

I was trying to grab the combo box instance used by CellRendererCombo in 
the editing_started signal and get a NULL pointer. Any workarounds?

#include <gtkmm.h>
#include <iostream>

void editing_started( Gtk::CellEditable* cell_editable, const 
Glib::ustring& path ) {
  std::cout << "========== :" << path << ":  " << cell_editable << 
std::endl;
  try{
    const std::type_info &info = typeid(*cell_editable);
   
    std::cout << "=============Editing started:" << info.name() << 
std::endl;
  }catch(std::exception &e) {
    std::cout << "============Cannot typeid:"<<e.what()  << std::endl;
  }
}

Gtk::CellEditable* _wr(void *p0) {
  std::cout << " p0:" << p0 ;
  Glib::ObjectBase *ob = Glib::wrap_auto((GObject*)(p0), false);
  std::cout << " ob:" << ob;
  const std::type_info &info = typeid(*ob);
  std::cout << " : " << info.name() ;
  Gtk::CellEditable *ce = dynamic_cast< Gtk::CellEditable* >(ob);
  std::cout << " ce:" << ce << std::endl;
  return ce;
}
int main(int argc, char **argv) {
  Gtk::Main k(argc,argv);
  Gtk::Window w;

  Gtk::TreeModelColumn<Glib::ustring>col1;
  Gtk::TreeModel::ColumnRecord columnRecord;
  columnRecord.add(col1);

  Glib::RefPtr<Gtk::ListStore> ls = Gtk::ListStore::create(columnRecord);
  for(int i=0;i<9;i++) {
    char buf[32];
    snprintf(buf, 32, "Row#%d",i);
    (*(ls->append()))[col1] = buf;
  }

  Gtk::TreeView tv(ls);

  Gtk::CellRendererCombo crc;
  Glib::RefPtr<Gtk::ListStore> ls2 = Gtk::ListStore::create(columnRecord);
  for(int i=0;i<9;i++) {
    char buf[32];
    snprintf(buf, 32, "Item#%d",i);
    (*(ls2->append()))[col1] = buf;
  }
  crc.property_model()=ls2;
  crc.property_editable() = true;
  crc.property_editable_set() = true;
  crc.property_text_column()=0;
  crc.property_has_entry()=true;
  crc.signal_editing_started().connect(sigc::ptr_fun(&editing_started));
  Gtk::TreeViewColumn tvcol("Col1",crc);
  tvcol.add_attribute(crc,"text",col1);

  Gtk::CellRendererText crt;
  crt.property_editable()=true;
  crt.signal_editing_started().connect(sigc::ptr_fun(&editing_started));
  tvcol.pack_start(crt);
  tvcol.add_attribute(crt,"text",col1);


  tv.append_column(tvcol);

  Gtk::ScrolledWindow sw;
  sw.add(tv);

  w.add(sw);
  w.show_all();

  Gtk::ComboBox cb;
  Gtk::ComboBoxEntry cb2;
  Gtk::Entry e;

  _wr((void *)cb.gobj());
  _wr((void *)cb2.gobj());
  _wr((void *)(e.gobj()));

  k.run(w);

  return 0;
}


Thanks,
-karthik

-- 
------------------------------------------------------------------------
Karthik Ganesan
Director, Software and Instrumentation
HandyLab Inc.
5230 S. State Road, Ste. 100
Ann Arbor, MI 48108
Ph:  734-663-7451 x223
Fax:734-663-7437
------------------------------------------------------------------------

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