new_grid: Add grid_lines.cc

gtk2_ardour/grid_lines.h

@@ -0,0 +1,41 @@
+/*
+    Copyright (C) 2000-2018 Paul Davis
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __ardour_grid_lines_h__
+#define __ardour_grid_lines_h__
+
+#include "canvas/line_set.h"
+#include "canvas/ruler.h"
+#include "ardour/tempo.h"
+
+class GridLines {
+public:
+	GridLines (ArdourCanvas::Container* group, double screen_height);
+	~GridLines ();
+
+	void draw (std::vector<ArdourCanvas::Ruler::Mark> marks);
+
+	void show();
+	void hide();
+
+private:
+
+	ArdourCanvas::LineSet lines;
+};
+
+#endif /* __ardour_grid_lines_h__ */