New handler. Ask the GtkFileChooser widget if it wants to do something

New handler. Ask the GtkFileChooser widget if it wants to do something

2004-03-04  Federico Mena Quintero  <federico@ximian.com>

	* gtk/gtkfilechooserdialog.c (response_cb):  New handler.  Ask the
	GtkFileChooser widget if it wants to do something special rather
	than letting us terminate the dialog.
	(gtk_file_chooser_dialog_init): Connect to "response"; see the
	comment in the sources to see why we don't override the method in
	class_init.

	* gtk/gtkfilechooserembed.h (struct _GtkFileChooserEmbedIface):
	Added a ::should_respond() method.

	* gtk/gtkfilechooserembed.c
	(_gtk_file_chooser_embed_delegate_iface_init): Add a delegate for ::should_respond().
	(delegate_should_respond): New delegate.
	(_gtk_file_chooser_embed_should_respond): New function.

	* gtk/gtkfilechooserdefault.c (set_list_model, create_file_list):
	Use dashes in signal names rather than underscores.
	(gtk_file_chooser_default_init): Hook up our ::should_respond() implementation.
	(gtk_file_chooser_default_should_respond): Implement.  go into a
	folder rather than responding if we are in File mode and the
	selected file is a folder.
	(get_selection): New helper function.
	(add_bookmark_button_clicked_cb): Use get_selection().
	(bookmarks_check_add_sensitivity): Likewise.
	(gtk_file_chooser_default_get_paths): Likewise.
	(check_save_entry): New helper function.
	(gtk_file_chooser_default_get_paths): Use check_save_entry().
	(selection_check): Renamed from selection_is_folders().  Now
	checks whether the selection is empty, all files, all folders.
	(bookmarks_check_add_sensitivity): Use selection_check().