Pulled tempo line stuff out into it's own relatively self-contained class.

Draw tempo lines on time canvas and connect them up all pretty-like to the ruler ticks.
Still needs some visual tweaking, but... they draw!  Finally!


git-svn-id: svn://localhost/ardour2/trunk@2247 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 48 insertions, 0 deletions

diff --git a/gtk2_ardour/tempo_lines.h b/gtk2_ardour/tempo_lines.h
new file mode 100644
index 0000000000..375ae9342b
--- /dev/null
+++ b/gtk2_ardour/tempo_lines.h
@@ -0,0 +1,48 @@
+/*
+    Copyright (C) 2000-2007 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_tempo_lines_h__
+#define __ardour_tempo_lines_h__
+
+#include <vector>
+#include <ardour/tempo.h>
+#include "canvas.h"
+#include "simpleline.h"
+
+class TempoLines {
+public:
+	TempoLines(ArdourCanvas::Canvas& canvas, ArdourCanvas::Group* group)
+		: _canvas(canvas)
+		, _group(group)
+	{}
+ 
+	ArdourCanvas::SimpleLine* get_line();
+
+	void draw(ARDOUR::TempoMap::BBTPointList& points, double frames_per_unit);
+	void hide();
+
+private:
+	typedef std::vector<ArdourCanvas::SimpleLine*> Lines;
+	Lines _free_lines;
+	Lines _used_lines;
+
+	ArdourCanvas::Canvas& _canvas;
+	ArdourCanvas::Group*  _group;
+};
+
+#endif /* __ardour_tempo_lines_h__ */