//HUD_Slider_Class.pde
//Che-Wei Wang | cwwang.com
//Date:6/12/2007

//Place this file in your sketch folder.
 
public class HUD{
  PApplet parent;

  PFont smFont;
  int n; //total number of sliders
  int m;// this slider number starting from 0
  int markerLength; //slider size
  color c; //slider colors
  int sw; //strokeWeight
  float v; //return value float 0-1
  String name, cnH;

  public HUD( String names, int mm,int nn, int mLength, color cc, int strokeW){
    this.parent=parent;
    //parent.regiserDispose(this);
    n=nn;
    m=mm;
    markerLength=mLength;
    c=cc;
    sw=strokeW;
    smFont=createFont("Helvetica",12);
    name=names;
    fill(c);
  }

  public void draw(){
    stroke(c);
    if(abs(pmouseX-mouseX)>0||abs(pmouseY-mouseY)>0){
      if (mouseX>width*m/n && mouseX<width*constrain(m+1,0,n)/n){
        pushMatrix();
        translate(width/n,height/2-markerLength/2);
        line(width*(m-1)/n,0,width*(m-1)/n,markerLength);
        line(width*m/n,0,width*m/n,markerLength);
        popMatrix();
        slider();
        help();
      }
    }
  }

  void slider(){
    if (mousePressed&&mouseX>width*m/n && mouseX<width*constrain(m+1,0,n)/n){
      if (mouseButton == LEFT){
        v=constrain(v+(pmouseY-mouseY)/(height/2-.001f) ,-1,1);
        pushMatrix();
        translate(width*m/n+width/n/2-markerLength/2,height/2);
        stroke(c);
        strokeWeight(sw);
        line(0,-v*height/2,markerLength,-v*height/2);
        popMatrix();
        help();
      }
    }
  }

  void help(){
    cnH=""+name+"="+nf(v,1,3)+"";
    pushMatrix();
    translate(width*(m)/n+width/n/2,height/2);
    textFont(smFont);
    textSize(10);
    textAlign(CENTER);
    text(cnH,0,0);
    popMatrix();
  }
}