#ifndef ICL_FSLIDER_HANDLE_H
#define ICL_FSLIDER_HANDLE_H

#include <iclGUIHandle.h>

/** \cond */
class QSlider;
/** \endcond */

namespace icl{
  
  /// Handle class for slider componets \ingroup HANDLES
  class FSliderHandle : public GUIHandle<QSlider>{
    public:
    /// Create an empty slider handle
    FSliderHandle();

    /// create a slider handle
    FSliderHandle(QSlider *sl,float minV, float maxV, int range, GUIWidget *w);
    
    /// set the min value
    void setMin(float min);

    /// set the max value
    void setMax(float max);

    /// set the range of the slider
    void setRange(float min, float max){ setMin(min); setMax(max); }
    
    /// set the current value of the slider
    void setValue(float val);

    /// sets all parameters of a slider
    void setAll(float min ,float max, float val){ setRange(min,max); setValue(val); }

    /// returns the current min. of the slider
    float getMin() const;

    /// returns the current max. of the slider
    float getMax() const;

    /// returns the current value of the slider
    float getValue() const;
    
    /// assigns a new value to the slider (equal to setValue)
    void operator=(float val) { setValue(val); }
    
    private:
    
    /// internal utiltiy function which update the param for the slider equation
    void updateMB(){
      m_fM = (m_fMax-m_fMin)/m_iSliderRange;
      m_fB = m_fMin;
    }

    /// current min value
    float m_fMin;
    
    /// current max value
    float m_fMax;
    
    /// utility function tranlating from valued to slider coordinates
    int f2i(float f) const{
      return (int)((f-m_fB)/m_fM);
    }

    /// utility function tranlating from slider to value coordinates
    float i2f(int i) const{
      return m_fM*i+m_fB;
    } 

    /// Slope for the internal slider equation 
    float m_fM;

    /// Bias for the internal slider equation 
    float m_fB;
    
    /// accumulator of the current slider range
    int m_iSliderRange;
  };
  
}

#endif