/**
 * Afscheid van Vlaamse Krijger: 
 * klik en schuif de filterbox doorheen het beeldvlak.</p><p> <a href="http://www.kortrijksetaferelen.net">Keer terug</a>
*/

 
float bx;
float by;
int bs = 130;

boolean bover = false;
boolean locked = false;
float bdifx = 0.9; 
float bdify = 0.9; 


void setup() 
{
  size(936,674);
 
  
  bx = width/4.0;
  by = height/4.0;
  rectMode(CENTER_RADIUS);  
}

void draw() 
{ 
  
  PImage img;
  img = loadImage( "afscheid3.jpg" );
  image(img,0,0);
  
  // Test if the cursor is over the box 
  if (mouseX > bx-bs && mouseX < bx+bs && 
      mouseY > by-bs && mouseY < by+bs) {
    bover = true;  
    if(!locked) { 
      stroke(102,102,102); 
      fill(255,255,255);
    } 
  } else {
    stroke(0,0,51);
    fill(51,0,51,85);
    bover = false;
  }
  
  // Draw the box
  rect(bx, by, bs, bs);
}

void mousePressed() {
  if(bover) { 
    locked = true; 
    stroke(0,0,51);
    fill(153,0,0,75);
  } else {
    locked = false;
  }
  bdifx = mouseX-bx; 
  bdify = mouseY-by; 

}

void mouseDragged() {
  if(locked) {
    bx = mouseX-bdifx; 
    by = mouseY-bdify; 
  }
}

void mouseReleased() {
  locked = false;
}