1 files changed, 59 insertions, 0 deletions
diff --git a/gtk2_ardour/ardour_gauge.h b/gtk2_ardour/ardour_gauge.h
new file mode 100644
index 0000000000..7f707d3ae0
--- /dev/null
+++ b/gtk2_ardour/ardour_gauge.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2017 Robin Gareus <robin@gareus.org>
+ *
+ * This program 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.
+ *
+ * This program 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 more 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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __gtkardour_gauge_h__
+#define __gtkardour_gauge_h__
+
+#include <pangomm.h>
+
+#include "gtkmm2ext/cairo_widget.h"
+
+class ArdourGauge : public CairoWidget
+{
+public:
+	ArdourGauge (std::string const& max_text = "00.0%");
+	virtual ~ArdourGauge ();
+
+protected:
+
+	enum Status {
+		Level_OK,   /* green */
+		Level_WARN, /* yellow */
+		Level_CRIT  /* red */
+	};
+
+	/* gauge's background, indicate alarming conditions eg. xrun */
+	virtual bool alert () const { return false; }
+	/* guage inidicator color */
+	virtual Status indicator () const = 0;
+	/* gauge level 0 <= level <= 1 */
+	virtual float level () const = 0;
+
+	virtual std::string tooltip_text () = 0;
+
+	void update ();
+	void update (std::string const &);
+
+private:
+	void on_size_request (Gtk::Requisition*);
+	void render (Cairo::RefPtr<Cairo::Context> const&, cairo_rectangle_t*);
+
+	Glib::RefPtr<Pango::Layout> _layout;
+};
+
+#endif