1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
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');
// 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';
}
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);
},
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+")";
}
|
