//
//  slider_class.pde
//  
//
//  Created by Karin Gauch and Fabien Schwartz on 10.06.07.
//  Copyright 2007 Karin Gauch and Fabien Schwartz. All rights reserved.
//

class slider
{
  int value;
  int lower, upper;
  int sliderWidth;
  int posX,posY;
  int left, right, top, bottom;
  boolean dragged = false;
  boolean active = true;
  
  // constructor
  slider(int x, int y, int w, int l, int u, int v)
  {
    value = v;
    lower = l;
    upper = u;
    sliderWidth = w;
    posX = x;
    posY = y;
    left = posX-10;
    right = posX + sliderWidth+10;
    top = posY - 10;
    bottom = posY + 10;
  } 
  
  // method to draw the slider
  void draw()
  {
    if(active)
      stroke(200);
    else
      stroke(220);
    line(posX-2,posY,posX+sliderWidth+2,posY);
    stroke(150);
    if(active)
      fill(200);
    else
    {
      fill(240);
      stroke(220);
    } 
    rect(posX+(int)map(value, lower, upper, 0, sliderWidth)-2,posY-10,4,20);
    //ellipse(posX+(int)map(value, lower, upper, 0, sliderWidth),posY,10,10);
  }
  
  // method to drag the slider
  void drag(int pos)
  {
    if(pos < posX)
      pos = posX;
    if(pos > posX+sliderWidth)
      pos = posX+sliderWidth;
    value = (int)map(pos, posX, posX+sliderWidth, lower, upper);
  }
  
}