SoFCColorBar.h

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/***************************************************************************
 *   Copyright (c) 2005 Werner Mayer <wmayer[at]users.sourceforge.net>     *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 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 Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/


#ifndef GUI_SOFCCOLORBAR_H
#define GUI_SOFCCOLORBAR_H

#include <Inventor/SbVec2s.h>
#include <Inventor/nodes/SoSeparator.h>
#include <QTime>
#include <Base/Observer.h>
#include <App/ColorModel.h>
#include <vector>

class SoSwitch;
class SoEventCallback;
class SbVec2s;
class SoHandleEventAction;
class SoGLRenderAction;

namespace Gui {
class SoFCColorGradient;

class GuiExport SoFCColorBarBase : public SoSeparator, public App::ValueFloatToRGB {
  typedef SoSeparator inherited;

  SO_NODE_ABSTRACT_HEADER(Gui::SoFCColorBarBase);

public:
  static void initClass(void);
  static void finish(void);

  virtual void GLRenderBelowPath ( SoGLRenderAction *action );

  virtual void setRange( float fMin, float fMax, int prec=3 ) = 0;
  virtual App::Color getColor(float fVal) const = 0;
  virtual bool isVisible (float fVal) const = 0;
  virtual void setOutsideGrayed (bool bVal) = 0;
  virtual float getMinValue (void) const = 0;
  virtual float getMaxValue (void) const = 0;
  virtual bool customize() = 0;
  virtual const char* getColorBarName() const = 0;

protected:
  virtual void setViewportSize( const SbVec2s& size ) = 0;

  SoFCColorBarBase (void);
  virtual ~SoFCColorBarBase ();

private:
  SbVec2s _windowSize;
};

// --------------------------------------------------------------------------

class GuiExport SoFCColorBar : public SoFCColorBarBase, public Base::Subject<int> {
  typedef SoFCColorBarBase inherited;

  SO_NODE_HEADER(Gui::SoFCColorBar);

public:
  static void initClass(void);
  static void finish(void);
  SoFCColorBar(void);

  SoFCColorBarBase* getActiveBar() const;
  void handleEvent (SoHandleEventAction *action);
  void setRange( float fMin, float fMax, int prec=3 );
  App::Color getColor(float fVal) const;
  void setOutsideGrayed (bool bVal);
  bool isVisible (float fVal) const;
  float getMinValue (void) const;
  float getMaxValue (void) const;
  bool customize();
  const char* getColorBarName() const { return "Color Bar"; }

protected:
  void setViewportSize( const SbVec2s& size );

  virtual ~SoFCColorBar();

private:
  static void eventCallback(void * userdata, SoEventCallback * node);

private:
  float _fMaxX, _fMinX, _fMaxY, _fMinY;
  QTime _timer;

  SoSwitch* pColorMode; 
  std::vector<SoFCColorBarBase*> _colorBars;
};

} // namespace Gui


#endif // GUI_SOFCCOLORBAR_H