Re: Gtk::FileChooser, multiple select, and select_filename

[muppet <scott asofyet org>]

punting to gtk-devel-list, as this appears to be a gtk+ issue and not a 
binding one.  (C code at the bottom, for those not versed in gtk2-perl; 
i've quoted the whole message for context.)


On Jul 17, 2004, at 2:09 PM, Daniel Flemming wrote:

> I've found that, with a FileChooserDialog anyway, using the 
> select_filename method doesn't work correctly with multiple file 
> selection enabled.
>
> Here's the relevant bits of code. This is how I would like the code to 
> work:
>
> 	    $fileChooser->select_all;
> 	    my @scanFiles = $fileChooser->get_filenames;
> 	    my @selectedFiles = ();
> 	    foreach (@scanFiles) {
> 		push(@selectedFiles, $_) if (file matches pattern);
> 	    }
> 	    $fileChooser->unselect_all;
> 	    $fileChooser->select_filename ($_) foreach (@selectedFiles);
>
> This is how I have the code working:
>
> 	    $fileChooser->select_all;
> 	    my @scanFiles = $fileChooser->get_filenames;
> 	    my @unselectedFiles = ();
> 	    foreach (@scanFiles) {
> 		push(@unselectedFiles, $_) if (file doesn't match pattern);
> 	    }
> 	    $fileChooser->select_all;
> 	    $fileChooser->unselect_filename ($_) foreach (@unselectedFiles);
>
> The second fragment works fine, but it's rather inefficient, 
> especially when you want to select, say, 12 files out of 200 or more. 
> The problem with the first fragment is that the select_filename method 
> doesn't seem to respect the multiple selection mode set in the 
> FileChooser, and the result is that the last filename to receive a 
> select_filename event is the only one that gets selected.
>
> This could be a bug in gtk itself, of course. I've got Gtk 2.4.3 on my 
> system.

the binding for gtk_file_chooser_set_filename() is trivial -- it just 
passes the args down to gtk+, which does all the work.

punting to gtk-devel-list, but you'd be best off filing a bug in 
bugzilla.  perhaps they can tell us first if it's 
known/expected/intended behavior.


here's an example using the first fragment from above, ported to C.  
pass the extension of the files to select as the first command-line 
argument, e.g.

   ./chooser .pl   # filenames ending in .pl


#include <gtk/gtk.h>

void
select_by_ext (GtkFileChooser * chooser,
               char * extension)
{
        GSList * scanfiles, * selectedfiles, * i;
        int len = strlen (extension);

	/* $fileChooser->select_all; */
        gtk_file_chooser_select_all (chooser);

        /* my @scanFiles = $fileChooser->get_filenames; */
        scanfiles = gtk_file_chooser_get_filenames (chooser);

        /* my @selectedFiles = (); */
        selectedfiles = NULL;

        /* foreach (@scanFiles) { */
        for (i = scanfiles ; i != NULL ; i = i->next) {
                /* push(@selectedFiles, $_) if (/$ext$/); */
                char * filename = (char*) i->data;
                int flen = strlen (filename);
                if (flen > len &&
                    0 == strcmp (filename + flen - len, extension))
                       selectedfiles = g_slist_append (selectedfiles,
                                                       filename);
        }

        /* $fileChooser->unselect_all; */
        gtk_file_chooser_unselect_all (chooser);

        /* $fileChooser->select_filename ($_) foreach (@selectedFiles); 
*/
        for (i = selectedfiles ; i != NULL ; i = i->next)
                gtk_file_chooser_select_filename (chooser, (gchar*) 
i->data);

        g_slist_free (scanfiles);
        g_slist_free (selectedfiles);
}

int
main (int argc,
      char * argv[])
{
        GtkWidget * chooser;
        char * extension = ".pl";

        /* use Gtk2 -init; */
        gtk_init (&argc, &argv);
        if (argc > 1)
                extension = argv[1];

        /* $fileChooser = Gtk2::FileChooserDialog->new ('foo', undef, 
'open',
                                                        'gtk-ok' => 
'ok');
         */
        chooser = gtk_file_chooser_dialog_new
                        ("foo", NULL, GTK_FILE_CHOOSER_ACTION_OPEN,
                         GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, NULL);

        /* $fileChooser->set_select_multiple (1); */
        gtk_file_chooser_set_select_multiple (GTK_FILE_CHOOSER 
(chooser),
                                              TRUE);

        /* $fileChooser->signal_connect_after (show => 
\&select_by_ext); */
        g_signal_connect_after (G_OBJECT (chooser), "show",
                                G_CALLBACK (select_by_ext), extension);

        /* $fileChooser->run; */
        gtk_dialog_run (GTK_DIALOG (chooser));

        return 0;
}


--
muppet <scott at asofyet dot org>