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window.onload = init;
function init() { map = new Map('map'); }
function Map(m) {
// Public variables
this.map = document.getElementById(m);
this.pos = YAHOO.util.Dom.getXY(this.map);
this.width = this.map.offsetWidth - 2;
this.height = this.map.offsetHeight - 2;
this.tilewidth = 254;
this.tileheight = 254;
if (this.width != 508 || this.height != 508) {
return false;
}
this.point = new Point();
this.zoomed = false;
this.drag = this.map.getElementsByTagName('div')[0];
// Private variables
var drag_x = 0;
var drag_y = 0;
var self = this;
// Event handlers
this.map.onmousedown = associateObjWithEvent(this, 'drag_start');
// this.map.ondblclick = associateObjWithEvent(this, 'centre');
this.map.onclick = associateObjWithEvent(this, 'add_pin');
document.onmouseout = associateObjWithEvent(this, 'drag_end_out');
function image_rotate(img, x, y) {
if (x) {
img.style.left = (img.offsetLeft + x*254) + 'px';
img.xx += x;
}
if (y) {
img.style.top = (img.offsetTop + y*254) + 'px';
img.yy += y;
}
var url = img.xx + '.' + img.yy + '.png';
url = 't/' + url;
img.src = url;
}
// Moving the map, loading more tiles as necessary
this.update = function(dx, dy, noMove) {
drag_x += dx;
drag_y += dy;
this.point.x = x + 1 - drag_x/this.tilewidth;
this.point.y = y + 1 - drag_y/this.tileheight;
if (!noMove) {
this.drag.style.left = drag_x + 'px';
this.drag.style.top = drag_y + 'px';
}
for (var i=0; i<6; i++) {
for (var j=0; j<6; j++) {
var id = i+'.'+j;
var xx = x+i-2;
var yy = y+j-2;
var img = document.getElementById(id);
if (img) {
if (!img.xx) { img.xx = xx; }
if (!img.yy) { img.yy = yy; }
if (!img.galleryimg) { img.galleryimg = false; }
if (drag_x + img.offsetLeft > 762) {
image_rotate(img, -6, 0);
} else if (drag_x + img.offsetLeft < -508) {
image_rotate(img, 6, 0);
} else if (drag_y + img.offsetTop > 762) {
image_rotate(img, 0, -6);
} else if (drag_y + img.offsetTop < -508) {
image_rotate(img, 0, 6);
}
continue;
}
img = document.createElement('img');
img.id = id;
img.style.position = 'absolute';
img.style.width = this.tilewidth + 'px';
img.style.height = this.tileheight + 'px';
img.style.left = ((i-2)*self.tilewidth) + 'px';
img.style.top = ((j-2)*self.tileheight) + 'px';
img.galleryimg = false;
img.xx = xx;
img.yy = yy;
image_rotate(img, 0, 0);
img.alt = 'Loading...';
this.drag.appendChild(img);
}
}
return false;
};
this.update(0,0);
this.add_pin = function(e, point) {
if (this.in_drag) { this.in_drag = false; return false; }
if (!point) point = new Point();
m = new Pin(point.x-this.pos[0]-drag_x, point.y-this.pos[1]-drag_y);
this.drag.appendChild(m.pin);
return false;
}
}
Map.prototype = {
myAnim : null,
in_drag : false,
setCursor : function(s) {
this.map.style.cursor = s;
},
centre : function(e, point){
var x = -point.x + this.width/2 + this.pos[0];
var y = -point.y + this.height/2 + this.pos[1];
this.pan(x,y);
},
pan : function(x,y) {
if (!this.myAnim || !this.myAnim.isAnimated()) {
this.update(x,y, true);
this.myAnim = new YAHOO.util.Motion('drag', {points: { by:[x,y] } }, 0.5, YAHOO.util.Easing.easeBoth);
this.myAnim.animate();
}
},
drag_move : function(e, point){
this.in_drag = true;
this.last_mouse_pos = this.mouse_pos;
this.mouse_pos = point;
this.update(this.mouse_pos.x-this.last_mouse_pos.x, this.mouse_pos.y-this.last_mouse_pos.y);
return false;
},
drag_start : function(e, point){
this.mouse_pos = point;
this.setCursor('move');
document.onmousemove = associateObjWithEvent(this, 'drag_move');
document.onmouseup = associateObjWithEvent(this, 'drag_end');
return false;
},
drag_end : function(e){
document.onmousemove = null;
document.onmouseup = null;
this.setCursor('auto');
// this.in_drag = false;
return false;
},
drag_end_out : function(e){
var relTarg;
if (e.relatedTarget) { relTarg = e.relatedTarget; }
else if (e.toElement) { relTarg = e.toElement; }
if (!relTarg) {
// mouse out to unknown = left the window?
document.onmousemove = null;
document.onmouseup = null;
this.setCursor('auto');
}
return false;
}
};
function get_posn(e) {
var posx, posy;
if (e.pageX || e.pageY) {
posx = e.pageX;
posy = e.pageY;
} else if (e.clientX || e.clientY) {
posx = e.clientX;
if (document.documentElement && document.documentElement.scrollLeft) {
posx += document.documentElement.scrollLeft;
} else {
posx += document.body.scrollLeft;
}
posy = e.clientY;
if (document.documentElement && document.documentElement.scrollTop) {
posy += document.documentElement.scrollTop;
} else {
posy += document.body.scrollTop;
}
}
return new Point(posx, posy);
}
function associateObjWithEvent(obj, methodName) {
return (function(e) {
e = e || window.event;
var point = get_posn(e);
return obj[methodName](e, point);
});
}
function Point(x,y) {
this.x = x || 0;
this.y = y || 0;
}
Point.prototype.toString = function(){
return "("+this.x+", "+this.y+")";
};
function Pin(x,y) {
this.x = x || 0;
this.y = y || 0;
this.x -= 6;
this.y -= 20;
pin = document.createElement('div');
pin.style.position = 'absolute';
pin.style.top = this.y + 'px';
pin.style.left = this.x + 'px';
shadow = document.createElement('img');
shadow.style.top = '0px';
shadow.style.left = '0px';
shadow.src = 'i/pin_shadow.png';
pin.appendChild(shadow);
img = document.createElement('img');
img.style.top = '0px';
img.style.left = '0px';
img.src = 'i/pin_yellow.png';
pin.appendChild(img);
this.pin = pin;
}
Pin.prototype.toString = function() {
return "("+this.x+", "+this.y+")";
}
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