Re: open an existing file in buffer and write on it

[zz excite it]

On Tuesday 29 January 2013 22:47:57 Rudra Banerjee wrote:
> I tried a lot(trying to understand the huge GLib as suggested by
> Andrew), but most of the discussion here went way beyond my capability.
> So, lets try from fresh.
>
> My code for treeview and editing the treeview column (column Id #1). So,
> once the column is edited, its updated by the cell_edited. Now, I need
> to put this new_text in the file as well. 
> The file that is read is a bibtex file (http://www.bibtex.org/Format/)
>
> GtkWidget *create_view_and_model(void) {
>     GtkCellRenderer *cell;
> void
> cell_edited(GtkCellRendererText *renderer,
>     gchar *path,
>     gchar *new_text,
>     GtkTreeView *treeview);
>
>   store = gtk_list_store_new (NUM_COLS, G_TYPE_STRING, G_TYPE_STRING,
>                                                 G_TYPE_STRING, 
>                                                 G_TYPE_STRING, 
>                                                 G_TYPE_STRING);
>
>   tree = gtk_tree_view_new_with_model (GTK_TREE_MODEL (store));
>   gtk_tree_view_set_rules_hint (GTK_TREE_VIEW(tree), TRUE);
>
>
> /* #1: KEY COLUMN */  
>   cell = gtk_cell_renderer_text_new ();
>   g_object_set (cell,
>                 "editable", TRUE,
>                 NULL);
>   g_signal_connect (cell, 
>       "edited",G_CALLBACK(cell_edited), 
>       tree);
>   g_object_set_data (G_OBJECT (cell), 
>       "column", GINT_TO_POINTER (COL_BIB_KEY));
>
>   GtkTreeViewColumn *col_key,*col_year,*col_type,*col_auth,*col_pub;
>   col_key=gtk_tree_view_column_new_with_attributes (
>       "Key", cell,
>       "text", COL_BIB_KEY,
>       NULL);
>   gtk_tree_view_column_set_sort_column_id( col_key, ID_KEY);
>   gtk_tree_view_append_column (GTK_TREE_VIEW (tree), col_key);
>   gtk_tree_view_column_set_max_width  (col_key,100);
>
>
> /* #2: TYPE COLUMN */  
>   cell = gtk_cell_renderer_text_new ();
>
>   col_type=gtk_tree_view_column_new_with_attributes (
>                                                "Type", cell,
>                                                "text", COL_BIB_TYPE,
>                                                NULL);
>   gtk_tree_view_column_set_sort_column_id( col_type, ID_TYPE);
>   gtk_tree_view_append_column (GTK_TREE_VIEW (tree), col_type);
>
>
> /*
> Three more such column of treeview
> */
>
>     return tree;
> }
>
>
> /* Apply the changed text to the cell if it is not an empty string. */
> void cell_edited(GtkCellRendererText *renderer,
>     gchar *path,
>     gchar *new_text,
>     GtkTreeView *treeview)
> {
>   guint column;
>   GtkTreeIter iter;
>   GtkTreeModel *model;
>   gpointer columnptr = g_object_get_data(G_OBJECT(renderer), "column");
>   column = GPOINTER_TO_UINT(columnptr);
>
>
>   if (g_ascii_strcasecmp (new_text, "") != 0)
>   {
>     model = gtk_tree_view_get_model (treeview);
>     if (gtk_tree_model_get_iter_from_string (model, &iter, path))
>       gtk_list_store_set (GTK_LIST_STORE (model), &iter, column,
> new_text, -1);
>  }
> }
> Kindly Help.

Take a look at:

http://www.gerd-neugebauer.de/software/TeX/BibTool/

this bibtool seems to be able to manipulate bibtex file fields.
So you maybe can call it from your program with the correct args
or take a look at the source to see how things are done.

Ciao,
ZZ