1 files changed, 119 insertions, 0 deletions
diff --git a/src/gui/BreadCrumbs.hpp b/src/gui/BreadCrumbs.hpp
new file mode 100644
index 00000000..467d3bfc
--- /dev/null
+++ b/src/gui/BreadCrumbs.hpp
@@ -0,0 +1,119 @@
+/*
+  This file is part of Ingen.
+  Copyright 2007-2015 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or 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 Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_GUI_BREADCRUMBS_HPP
+#define INGEN_GUI_BREADCRUMBS_HPP
+
+#include <list>
+
+#include <gtkmm/box.h>
+#include <gtkmm/label.h>
+#include <gtkmm/togglebutton.h>
+
+#include "raul/Path.hpp"
+
+#include "ingen/client/GraphModel.hpp"
+#include "ingen/types.hpp"
+
+#include "GraphView.hpp"
+
+namespace Ingen {
+namespace GUI {
+
+/** Collection of breadcrumb buttons forming a path.
+ * This doubles as a cache for GraphViews.
+ *
+ * \ingroup GUI
+ */
+class BreadCrumbs : public Gtk::HBox
+{
+public:
+	explicit BreadCrumbs(App& app);
+
+	SPtr<GraphView> view(const Raul::Path& path);
+
+	void build(Raul::Path path, SPtr<GraphView> view);
+
+	sigc::signal<void, const Raul::Path&, SPtr<GraphView> > signal_graph_selected;
+
+private:
+	/** Breadcrumb button.
+	 *
+	 * Each Breadcrumb stores a reference to a GraphView for quick switching.
+	 * So, the amount of allocated GraphViews 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 Raul::Path& path, SPtr<GraphView> view = SPtr<GraphView>())
+			: _path(path)
+			, _view(view)
+		{
+			assert(!view || view->graph()->path() == path);
+			set_border_width(0);
+			set_path(path);
+			set_can_focus(false);
+			show_all();
+		}
+
+		void set_view(SPtr<GraphView> view) {
+			assert(!view || view->graph()->path() == _path);
+			_view = view;
+		}
+
+		const Raul::Path& path() const { return _path; }
+		SPtr<GraphView>   view() const { return _view; }
+
+		void set_path(const Raul::Path& path) {
+			remove();
+			const char* text = (path.is_root()) ? "/" : path.symbol();
+			Gtk::Label* lab = manage(new Gtk::Label(text));
+			lab->set_padding(0, 0);
+			lab->show();
+			add(*lab);
+
+			if (_view && _view->graph()->path() != path)
+				_view.reset();
+		}
+
+	private:
+		Raul::Path      _path;
+		SPtr<GraphView> _view;
+	};
+
+	BreadCrumb* create_crumb(const Raul::Path& path,
+	                         SPtr<GraphView>   view = SPtr<GraphView>());
+
+	void breadcrumb_clicked(BreadCrumb* crumb);
+
+	void message(const Message& msg);
+	void object_destroyed(const URI& uri);
+	void object_moved(const Raul::Path& old_path, const Raul::Path& new_path);
+
+	Raul::Path             _active_path;
+	Raul::Path             _full_path;
+	bool                   _enable_signal;
+	std::list<BreadCrumb*> _breadcrumbs;
+};
+
+} // namespace GUI
+} // namespace Ingen
+
+#endif // INGEN_GUI_BREADCRUMBS_HPP