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+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ *
+ * Ingen is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef BREADCRUMB_H
+#define BREADCRUMB_H
+
+#include <gtkmm.h>
+#include <raul/Path.h>
+#include <raul/SharedPtr.h>
+#include "PatchView.h"
+
+namespace Ingen {
+namespace GUI {
+
+
+/** Breadcrumb button in a PatchWindow.
+ *
+ * Each Breadcrumb stores a reference to a PatchView for quick switching.
+ * So, the amount of allocated PatchViews at a given time is equal to the
+ * number of visible breadcrumbs (which is the perfect cache for GUI
+ * responsiveness balanced with mem consumption).
+ *
+ * \ingroup GUI
+ */
+class BreadCrumb : public Gtk::ToggleButton
+{
+public:
+ BreadCrumb(const Path& path, SharedPtr<PatchView> view = SharedPtr<PatchView>())
+ : _path(path)
+ , _view(view)
+ {
+ assert( !view || view->patch()->path() == path);
+ set_border_width(0);
+ set_path(path);
+ show_all();
+ }
+
+ void set_view(SharedPtr<PatchView> view) {
+ assert( !view || view->patch()->path() == _path);
+ _view = view;
+ }
+
+ const Path& path() const { return _path; }
+ SharedPtr<PatchView> view() const { return _view; }
+
+ void set_path(const Path& path)
+ {
+ remove();
+ const string text = (path == "/") ? "/" : path.name();
+ Gtk::Label* lab = manage(new Gtk::Label(text));
+ lab->set_padding(0, 0);
+ lab->show();
+ add(*lab);
+
+ if (_view && _view->patch()->path() != path)
+ _view.reset();
+ }
+
+private:
+ Path _path;
+ SharedPtr<PatchView> _view;
+};
+
+} // namespace GUI
+} // namespace Ingen
+
+#endif // BREADCRUMB_H