How can I change height and width of a treeview? - c

Question

I've been stuck with this problem for a while. I have a tree view that shows a table. The size of the table depends on the user's input. I want to make it look nice and when the table has only 2 columns there is a lot of space that isn't use. So how do I change the heigth and width of the tree view? Thanks
static void show_results(struct listaObjetos *vectorObjetos[],int cantidad, int tamanoMochila){
int i;
char msg[180] = {0};
/
GtkCellRenderer *renderer;
GtkTreeViewColumn *column;
treeView = gtk_tree_view_new ();
gtk_widget_set_size_request (GTK_WIDGET (treeView), 0, 0);
window2 = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window2), "Resultados");
gtk_container_set_border_width(GTK_CONTAINER(window2),10);
gtk_widget_set_size_request (window2, 480, 320);
renderer = gtk_cell_renderer_text_new();
column = gtk_tree_view_column_new_with_attributes("column1 ", renderer, "text",COLUM1, NULL);
gtk_tree_view_append_column (GTK_TREE_VIEW (treeView), column);
column = gtk_tree_view_column_new_with_attributes("colum2 ", renderer, "text",COLUM2, NULL);
gtk_tree_view_append_column (GTK_TREE_VIEW (treeView), column);
column = gtk_tree_view_column_new_with_attributes("colum3 ", renderer, "text",COLUMN3, NULL);
gtk_tree_view_append_column (GTK_TREE_VIEW (treeView), column);
column = gtk_tree_view_column_new_with_attributes("colum4", renderer, "text",COLUM4, NULL);
gtk_tree_view_append_column (GTK_TREE_VIEW (treeView), column);
store = gtk_list_store_new (4, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT,G_TYPE_INT);
for(i=0; i<cantidad; i++)
{
gtk_list_store_append (store, &iter);
gtk_list_store_set (store, &iter, COLUM1, vectorObjetos[i]->x,COLUMN2,
vectorObjetos[i]->y, COLUM3, vectorObjetos[i]->q,
COLUM4,vectorObjetos[i]->z,-1);
}
gtk_tree_view_columns_autosize(GTK_TREE_VIEW (treeView));
gtk_tree_view_set_model (GTK_TREE_VIEW (treeView), GTK_TREE_MODEL (store));
g_object_unref (store);
scrolledWin = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledWin),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
table = gtk_table_new(10,10,FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 5);
gtk_table_set_col_spacings (GTK_TABLE (table), 5);
gtk_tree_view_column_set_sizing (column, GTK_TREE_VIEW_COLUMN_AUTOSIZE);
gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolledWin), table);
label = gtk_label_new("Objetos sujetos a analisis");
gtk_table_attach_defaults(GTK_TABLE(table), label,4,5,0,1);
g_snprintf(msg, sizeof msg, "A message here ",
cantidad, tamanoMochila );
label = gtk_label_new(msg);
gtk_table_attach_defaults(GTK_TABLE(table), label,0,10,1,2);
label = gtk_label_new(" ");
gtk_table_attach_defaults(GTK_TABLE(table), label,3,4,2,4);
gtk_table_attach_defaults (GTK_TABLE(table), treeView, 4,5,2,4);
label = gtk_label_new(" ");
gtk_table_attach_defaults(GTK_TABLE(table), label,5,6,2,4);
gtk_container_add (GTK_CONTAINER (window2), scrolledWin);
gtk_widget_show_all (window2);
}
I tried to post an image with the result but I couldn't due to reputation