New list class with iterators.

2000-07-03  Christopher James Lahey  <clahey@helixcode.com>

	* e-iterator.c, e-iterator.h, e-list-iterator.c,
	e-list-iterator.h, e-list.c, e-list.h: New list class with
	iterators.

	* e-canvas.c: Made it so that you don't get the same selection in
	the selection list more than once.

svn path=/trunk/; revision=3871

1 files changed, 61 insertions, 0 deletions

diff --git a/e-util/e-iterator.h b/e-util/e-iterator.h
new file mode 100644
index 0000000000..eb983e9da9
--- /dev/null
+++ b/e-util/e-iterator.h
@@ -0,0 +1,61 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * Authors:
+ *   Chris Lahey <clahey@helixcode.com>
+ *
+ * Copyright (C) 2000 Helix Code, Inc.
+ * Copyright (C) 1999 The Free Software Foundation
+ */
+
+#ifndef __E_ITERATOR_H__
+#define __E_ITERATOR_H__
+
+#include <time.h>
+#include <gtk/gtk.h>
+#include <stdio.h>
+
+#define E_TYPE_ITERATOR            (e_iterator_get_type ())
+#define E_ITERATOR(obj)            (GTK_CHECK_CAST ((obj), E_TYPE_ITERATOR, EIterator))
+#define E_ITERATOR_CLASS(klass)    (GTK_CHECK_CLASS_CAST ((klass), E_TYPE_ITERATOR, EIteratorClass))
+#define E_IS_ITERATOR(obj)         (GTK_CHECK_TYPE ((obj), E_TYPE_ITERATOR))
+#define E_IS_ITERATOR_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), E_TYPE_ITERATOR))
+
+typedef struct _EIterator EIterator;
+typedef struct _EIteratorClass EIteratorClass;
+
+struct _EIterator {
+	GtkObject object;
+};
+
+struct _EIteratorClass {
+	GtkObjectClass parent_class;
+
+	/* Signals */
+	void         (*invalidate) (EIterator *iterator);
+	
+	/* Virtual functions */
+	const void * (*get)        (EIterator *iterator);
+	void         (*reset)      (EIterator *iterator);
+	gboolean     (*next)       (EIterator *iterator);
+	gboolean     (*prev)       (EIterator *iterator);
+	void         (*delete)     (EIterator *iterator);
+	void         (*set)        (EIterator *iterator,
+				    const void    *object);
+	gboolean     (*is_valid)   (EIterator *iterator);
+};
+
+const void    *e_iterator_get        (EIterator *iterator);
+void           e_iterator_reset      (EIterator *iterator);
+gboolean       e_iterator_next       (EIterator *iterator);
+gboolean       e_iterator_prev       (EIterator *iterator);
+void           e_iterator_delete     (EIterator *iterator);
+void           e_iterator_set        (EIterator *iterator, 
+				      const void    *object);
+gboolean       e_iterator_is_valid   (EIterator *iterator);
+
+void           e_iterator_invalidate (EIterator *iterator);
+
+/* Standard Gtk function */
+GtkType        e_iterator_get_type   (void);
+
+#endif /* ! __E_ITERATOR_H__ */