rtgui/mycurve.h

   1 /*
   2  *  This file is part of RawTherapee.
   3  *
   4  *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
   5  *
   6  *  RawTherapee is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  RawTherapee is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #ifndef _MYCURVE_
  20 #define _MYCURVE_
  21
  22 #include <gtkmm.h>
  23 #include <vector>
  24
  25 class CurveListener {
  26
  27     public:
  28         virtual void curveChanged () {}
  29 };
  30
  31 enum CurveType {Linear, Spline};
  32
  33 class CurveDescr {
  34
  35     public:
  36         CurveType type;
  37         std::vector<double> x, y;
  38 };
  39
  40 class MyCurve : public Gtk::DrawingArea {
  41
  42         CurveListener* listener;
  43         CurveDescr curve;
  44         Gdk::CursorType cursor_type;
  45         Glib::RefPtr<Gdk::Pixmap> pixmap;
  46         int height;
  47         int grab_point;
  48         int last;
  49         std::vector<Gdk::Point> point;
  50
  51     protected:
  52         void draw (int width, int height);
  53         void interpolate (int width, int height);
  54         std::vector<double> get_vector (int veclen);
  55         double spline_eval (int n, double x[], double y[], double y2[], double val);
  56         void spline_solve (int n, double x[], double y[], double y2[]);
  57
  58     public:
  59         MyCurve ();
  60
  61         void setCurveListener (CurveListener* cl) { listener = cl; }
  62         std::vector<double> getPoints ();
  63         void setPoints (const std::vector<double>& p);
  64         void setType (CurveType t);
  65         bool handleEvents (GdkEvent* event);
  66         void notifyListener ();
  67 };
  68
  69 #endif