gtk2_ardour/automation_range.h

   1 /*
   2     Copyright (C) 2000-2007 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifndef __ardour_gtk_automation_range_h__
  21 #define __ardour_gtk_automation_range_h__
  22
  23 class TimeAxisView;
  24
  25 /** A rectangular range of an automation line, used to express a selected area.
  26  *
  27  *  x coordinates start/end are in AutomationList model coordinates.
  28  *  y coordinates are a expressed as a fraction of the AutomationTimeAxisView's height, where 0 is the
  29  *  bottom of the track, and 1 is the top.
  30  *
  31  *  This representation falls between the visible GUI control points and
  32  *  the back-end "actual" automation points, some of which may not be
  33  *  visible; it is not trivial to convert from one of these to the
  34  *  other, so the AutomationSelectable is a kind of "best and worst of
  35  *  both worlds".
  36  *
  37  *  It offers a zoom-independent representation of a selected area of automation.
  38  */
  39 struct AutomationRange
  40 {
  41         double start;
  42         double end;
  43         double low_fract;
  44         double high_fract;
  45         TimeAxisView* track; // ref would be better, but ARDOUR::SessionHandlePtr is non-assignable
  46
  47         AutomationRange (double s, double e, double l, double h, TimeAxisView* atv)
  48                 : start (s), end (e), low_fract (l), high_fract (h), track (atv) {}
  49 };
  50
  51 #endif /* __ardour_gtk_automation_range_h__ */