#include "iclDoubleSlider.h"

#include <QSlider>
#include <QLabel>
#include <QGridLayout>
#include <math.h>

using namespace std;

namespace icl{
  DoubleSlider::DoubleSlider(QWidget *parent, const QString &id): QWidget(parent),m_qsID(id){
    m_poSlider = new QSlider(this);
    m_poSlider->setMinimum(0);
    m_poSlider->setMaximum(10000);    
    m_poSlider->setOrientation(Qt::Horizontal);
    m_poLabel = new QLabel(this);
    
    m_poLayout = new QGridLayout(this);
    m_poLayout->addWidget(m_poSlider,0,0,1,5); // y,x ??
    m_poLayout->addWidget(m_poLabel,0,5,1,1); // y,x ??

    m_dStepping = 0;
    
    connect(m_poSlider,SIGNAL(valueChanged(int)),this,SLOT(receiveValueChanged(int)));
    m_poLayout->setMargin(1);
    setLayout(m_poLayout);
    setMinimumWidth(300);


  }
  
  double DoubleSlider::getDoubleValue(){
    int i = m_poSlider->value(); 
    double srcRange = 10000;
    double dstRange = m_dMax-m_dMin;
    double val = (dstRange/srcRange)*i + m_dMin;
    
    if(m_dStepping){
      int stepIdx = (int)round((val-m_dMin)/m_dStepping);
      val = m_dMin+stepIdx*m_dStepping;
    } 
    
    m_poLabel->setNum(val);
    return val;
  }
  
  void DoubleSlider::receiveValueChanged(int i){
    emit doubleValueChanged(m_qsID,getDoubleValue());  
  }
  
  void DoubleSlider::setDoubleValue(double d){
    double r = m_dMax-m_dMin;
    double m = 10000.0/r;
    double b = -m*m_dMin;
    m_poLabel->setNum(d);
    m_poSlider->setValue((int)(m*d+b));;    
  }

  void DoubleSlider::setDoubleStepping(double s){
    double r = m_dMax-m_dMin;
    static const double ri = 10000;
    
    int interval =   (int)round(r/ri *s);
    if(interval < 100) interval *=10;
    if(interval < 100) interval *=10;
    
    m_poSlider->setTickInterval(interval);
    m_poSlider->setSingleStep(interval);
    m_poSlider->setTickPosition(QSlider::TicksBelow);

    m_dStepping = s;
  }
  
  void DoubleSlider::setMinDouble(double dmin){
    m_dMin = dmin;    
  }
  void DoubleSlider::setMaxDouble(double dmax){
    m_dMax = dmax;    
  }
}