adjustment.hh

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/* Rapicorn
 * Copyright (C) 2005 Tim Janik
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * A copy of the GNU Lesser General Public License should ship along
 * with this library; if not, see http://www.gnu.org/copyleft/.
 */
#ifndef __RAPICORN_ADJUSTMENT_HH__
#define __RAPICORN_ADJUSTMENT_HH__

#include <ui/item.hh>

namespace Rapicorn {

class Adjustment : public virtual BaseObject {
  typedef Signal<Adjustment, void ()>   SignalValueChanged;
  typedef Signal<Adjustment, void ()>   SignalRangeChanged;
protected:
  explicit              Adjustment      ();
  virtual               ~Adjustment     ();
  virtual void          value_changed   ();
  virtual void          range_changed   ();
public:
  /* value */
  virtual double        value           () = 0;
  virtual void          value           (double newval) = 0;
  double                flipped_value   ();
  void                  flipped_value   (double newval);
  SignalValueChanged    sig_value_changed;
  /* normalized (0..1) value */
  double                nvalue          ();
  void                  nvalue          (double newval);
  double                flipped_nvalue  ();
  void                  flipped_nvalue  (double newval);
  /* range */
  virtual bool          frozen          () const = 0;
  virtual void          freeze          () = 0;
  virtual double        lower           () const = 0;
  virtual void          lower           (double newval) = 0;
  virtual double        upper           () const = 0;
  virtual void          upper           (double newval) = 0;
  virtual double        step_increment  () const = 0;
  virtual void          step_increment  (double newval) = 0;
  virtual double        page_increment  () const = 0;
  virtual void          page_increment  (double newval) = 0;
  virtual double        page            () const = 0;
  virtual void          page            (double newval) = 0;
  virtual void          constrain       () = 0;
  virtual void          thaw            () = 0;
  SignalRangeChanged    sig_range_changed;
  double                abs_range       ();
  double                abs_length      ();
  String                string          ();
  /* factory */
  static Adjustment*    create          (double  value = 0,
                                         double  lower = 0,
                                         double  upper = 100,
                                         double  step_increment = 1,
                                         double  page_increment = 10,
                                         double  page_size = 0);
};

class AdjustmentSource : public virtual BaseObject {
public:
  virtual Adjustment*   get_adjustment  (AdjustmentSourceType   adj_source,
                                         const String          &name = "") = 0;
};

} // Rapicorn

#endif  /* __RAPICORN_ADJUSTMENT_HH__ */