class HScrollbar
{
  
  
  
//PROPERTIES
  int swidth, sheight;    // gršsse des balkens
  int xpos, ypos;         // position des balkens
  float spos, newspos;    // x position des reglers
  int sposMin, sposMax;   // max und min wert des reglers
  float s;                // Schrittgršsse
  boolean over;           // ist die maus Ÿber dem regler
  boolean locked;
//---------------------------------------------------------------------------------------------------------
//---------------------------------------------------------------------------------------------------------
//CONSTRUCTOR

    HScrollbar (int xp, int yp, int sw, int sh,int s) 
    {
    this.s=s;
    swidth = sw;
    sheight = sh;
    xpos = xp;
    ypos = yp-sheight/2;
    spos = xpos + swidth/2 - sheight/2;
    newspos = spos;
    sposMin = xpos;
    sposMax = xpos + swidth - sheight;

    }
 //---------------------------------------------------------------------------------------------------------
 //---------------------------------------------------------------------------------------------------------
 //METHODES

    void update()
    {
      if(over()) 
        {
        over = true;
        } else {
        over = false;
        }
      if(mousePressed && over) 
        {
        locked = true;
        }
      if(!mousePressed) 
        {
        locked = false;
        }
      if(locked) 
        {
        newspos = constrain(mouseX-sheight/2, sposMin, sposMax);
        }
      if(abs(newspos - spos) > 1) 
        {
        spos = spos + (newspos-spos);
        }
    }
 //---------------------------------------------------------------------------------------------------------

    int constrain(int val, int minv, int maxv) 
    {
    return min(max(val, minv), maxv);
    }
//---------------------------------------------------------------------------------------------------------
    boolean over() 
    {
    if(mouseX > xpos && mouseX < xpos+swidth &&
       mouseY > ypos && mouseY < ypos+sheight) 
       {
        return true;
       } else {
        return false;
       }
  }
//---------------------------------------------------------------------------------------------------------
  void display() 
  {
    fill(255);
    rect(xpos, ypos, swidth, sheight);
    if(over || locked) 
    {
      fill(153, 102, 0);
    } else {
      fill(102, 102, 102);
    }
    rect(spos, ypos, sheight, sheight);
  }
//---------------------------------------------------------------------------------------------------------
  float getPos() 
  {
    return round (spos-xpos+1)*s;
  }
//---------------------------------------------------------------------------------------------------------
}