Re: GtkTree row.set_value does not work

["Luis A. Montes" <luis montes qdusa com>]

Hi there,

I'm still trying to figure out why this does not work. But now I do have
two minimal programs that try to set values to the tree store using the
set_value method. One uses plain Gtk+ and the other uses gtkmm. Both
read the same glade file using GtkBuilder. The Gtk+ program works, a row
with the desired value appears on the TreeView, but the gtkmm doesn't
work and outputs the following warning:

Gtk-WARNING **: gtktreestore.c:765: Unable to convert from
glibmm__CustomPointer_char++ to gchararray.

The programs are really simple, so I hope it's not to much of a deluge
if I quote them. They both compile without warnings. First the Gtk+
version:
//-------------------------------------------------------------------------
#include "gtk/gtk.h"

int main(int argc, char *argv[])
{

	GtkBuilder *builder;
	GtkWidget *window;
	GtkTreeStore *store;
	GtkTreeIter   iter;

	gtk_init( &argc, &argv );

	builder = gtk_builder_new();
	gtk_builder_add_from_file(builder,"GladeTest.glade",NULL);

	window = GTK_WIDGET( gtk_builder_get_object(builder,"window1") );

	store = GTK_TREE_STORE( gtk_builder_get_object(builder,"treestore1") );
	gtk_tree_store_append(store, &iter, NULL);
	gtk_tree_store_set (store, &iter, 0, "Hello", -1);

	g_object_unref( G_OBJECT(builder) );
	gtk_widget_show(window);
	gtk_main();

	return 0;
}
//-------------------------------------------------------------------------
And now the Gtkmm version:

//-------------------------------------------------------------------------
#include <gtkmm.h>

static Glib::RefPtr<Gtk::Builder> builder;

int main(int argc, char *argv[])
{
	gchar buffer[]="Hello";
	Gtk::Main kit(argc, argv);
	builder = Gtk::Builder::create_from_file("GladeTest.glade");

	Glib::RefPtr<Gtk::TreeStore> tree_store =
Glib::RefPtr<Gtk::TreeStore>::cast_static(builder->get_object("treestore1"));
	if (tree_store){
		Gtk::TreeStore::Row row = *(tree_store->append());
		row.set_value<gchararray>(0, &buffer[0]);
	}
	
	Gtk::Window* pWindow = 0;
	builder->get_widget("window1", pWindow);
	if (pWindow)
		kit.run(*pWindow);
}
//-------------------------------------------------------------------------
Both use the same glade file:

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <requires lib="gtk+" version="2.16"/>
  <!-- interface-naming-policy project-wide -->
  <object class="GtkTreeStore" id="treestore1">
    <columns>
      <!-- column-name name -->
      <column type="gchararray"/>
      <!-- column-name type -->
      <column type="gint"/>
    </columns>
  </object>
  <object class="GtkWindow" id="window1">
    <child>
      <object class="GtkTreeView" id="treeview1">
        <property name="visible">True</property>
        <property name="can_focus">True</property>
        <property name="model">treestore1</property>
        <child>
          <object class="GtkTreeViewColumn" id="treeviewcolumn1">
            <property name="title">column</property>
            <child>
              <object class="GtkCellRendererText"
id="cellrenderertext1"/>
              <attributes>
                <attribute name="text">0</attribute>
              </attributes>
            </child>
          </object>
        </child>
      </object>
    </child>
  </object>
</interface>