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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
*/
/**
* Class: OpenLayers.Control.MousePosition
* The MousePosition control displays geographic coordinates of the mouse
* pointer, as it is moved about the map.
*
* You can use the <prefix>- or <suffix>-properties to provide more information
* about the displayed coordinates to the user:
*
* (code)
* var mousePositionCtrl = new OpenLayers.Control.MousePosition({
* prefix: '<a target="_blank" ' +
* 'href="http://spatialreference.org/ref/epsg/4326/">' +
* 'EPSG:4326</a> coordinates: '
* }
* );
* (end code)
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.MousePosition = OpenLayers.Class(OpenLayers.Control, {
/**
* APIProperty: autoActivate
* {Boolean} Activate the control when it is added to a map. Default is
* true.
*/
autoActivate: true,
/**
* Property: element
* {DOMElement}
*/
element: null,
/**
* APIProperty: prefix
* {String} A string to be prepended to the current pointers coordinates
* when it is rendered. Defaults to the empty string ''.
*/
prefix: '',
/**
* APIProperty: separator
* {String} A string to be used to seperate the two coordinates from each
* other. Defaults to the string ', ', which will result in a
* rendered coordinate of e.g. '42.12, 21.22'.
*/
separator: ', ',
/**
* APIProperty: suffix
* {String} A string to be appended to the current pointers coordinates
* when it is rendered. Defaults to the empty string ''.
*/
suffix: '',
/**
* APIProperty: numDigits
* {Integer} The number of digits each coordinate shall have when being
* rendered, Defaults to 5.
*/
numDigits: 5,
/**
* APIProperty: granularity
* {Integer}
*/
granularity: 10,
/**
* APIProperty: emptyString
* {String} Set this to some value to set when the mouse is outside the
* map.
*/
emptyString: null,
/**
* Property: lastXy
* {<OpenLayers.Pixel>}
*/
lastXy: null,
/**
* APIProperty: displayProjection
* {<OpenLayers.Projection>} The projection in which the mouse position is
* displayed.
*/
displayProjection: null,
/**
* Constructor: OpenLayers.Control.MousePosition
*
* Parameters:
* options - {Object} Options for control.
*/
/**
* Method: destroy
*/
destroy: function() {
this.deactivate();
OpenLayers.Control.prototype.destroy.apply(this, arguments);
},
/**
* APIMethod: activate
*/
activate: function() {
if (OpenLayers.Control.prototype.activate.apply(this, arguments)) {
this.map.events.register('mousemove', this, this.redraw);
this.map.events.register('mouseout', this, this.reset);
this.redraw();
return true;
} else {
return false;
}
},
/**
* APIMethod: deactivate
*/
deactivate: function() {
if (OpenLayers.Control.prototype.deactivate.apply(this, arguments)) {
this.map.events.unregister('mousemove', this, this.redraw);
this.map.events.unregister('mouseout', this, this.reset);
this.element.innerHTML = "";
return true;
} else {
return false;
}
},
/**
* Method: draw
* {DOMElement}
*/
draw: function() {
OpenLayers.Control.prototype.draw.apply(this, arguments);
if (!this.element) {
this.div.left = "";
this.div.top = "";
this.element = this.div;
}
return this.div;
},
/**
* Method: redraw
*/
redraw: function(evt) {
var lonLat;
if (evt == null) {
this.reset();
return;
} else {
if (this.lastXy == null ||
Math.abs(evt.xy.x - this.lastXy.x) > this.granularity ||
Math.abs(evt.xy.y - this.lastXy.y) > this.granularity)
{
this.lastXy = evt.xy;
return;
}
lonLat = this.map.getLonLatFromPixel(evt.xy);
if (!lonLat) {
// map has not yet been properly initialized
return;
}
if (this.displayProjection) {
lonLat.transform(this.map.getProjectionObject(),
this.displayProjection );
}
this.lastXy = evt.xy;
}
var newHtml = this.formatOutput(lonLat);
if (newHtml != this.element.innerHTML) {
this.element.innerHTML = newHtml;
}
},
/**
* Method: reset
*/
reset: function(evt) {
if (this.emptyString != null) {
this.element.innerHTML = this.emptyString;
}
},
/**
* Method: formatOutput
* Override to provide custom display output
*
* Parameters:
* lonLat - {<OpenLayers.LonLat>} Location to display
*/
formatOutput: function(lonLat) {
var digits = parseInt(this.numDigits);
var newHtml =
this.prefix +
lonLat.lon.toFixed(digits) +
this.separator +
lonLat.lat.toFixed(digits) +
this.suffix;
return newHtml;
},
CLASS_NAME: "OpenLayers.Control.MousePosition"
});
|
