07ecdfa51de63e76fe23d018b01415ce8f2063fc.svn-base
7.53 KB
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
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
/* Copyright (c) 2006-2011 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the Clear BSD license.
* See http://svn.openlayers.org/trunk/openlayers/license.txt for the
* full text of the license. */
/**
* @requires OpenLayers/Handler.js
* @requires OpenLayers/Handler/Drag.js
*/
/**
* Class: OpenLayers.Handler.Box
* Handler for dragging a rectangle across the map. Box is displayed
* on mouse down, moves on mouse move, and is finished on mouse up.
*
* Inherits from:
* - <OpenLayers.Handler>
*/
OpenLayers.Handler.Box = OpenLayers.Class(OpenLayers.Handler, {
/**
* Property: dragHandler
* {<OpenLayers.Handler.Drag>}
*/
dragHandler: null,
/**
* APIProperty: boxDivClassName
* {String} The CSS class to use for drawing the box. Default is
* olHandlerBoxZoomBox
*/
boxDivClassName: 'olHandlerBoxZoomBox',
/**
* Property: boxOffsets
* {Object} Caches box offsets from css. This is used by the getBoxOffsets
* method.
*/
boxOffsets: null,
/**
* Constructor: OpenLayers.Handler.Box
*
* Parameters:
* control - {<OpenLayers.Control>}
* callbacks - {Object} An object with a properties whose values are
* functions. Various callbacks described below.
* options - {Object}
*
* Named callbacks:
* start - Called when the box drag operation starts.
* done - Called when the box drag operation is finished.
* The callback should expect to receive a single argument, the box
* bounds or a pixel. If the box dragging didn't span more than a 5
* pixel distance, a pixel will be returned instead of a bounds object.
*/
initialize: function(control, callbacks, options) {
OpenLayers.Handler.prototype.initialize.apply(this, arguments);
this.dragHandler = new OpenLayers.Handler.Drag(
this,
{
down: this.startBox,
move: this.moveBox,
out: this.removeBox,
up: this.endBox
},
{keyMask: this.keyMask}
);
},
/**
* Method: destroy
*/
destroy: function() {
OpenLayers.Handler.prototype.destroy.apply(this, arguments);
if (this.dragHandler) {
this.dragHandler.destroy();
this.dragHandler = null;
}
},
/**
* Method: setMap
*/
setMap: function (map) {
OpenLayers.Handler.prototype.setMap.apply(this, arguments);
if (this.dragHandler) {
this.dragHandler.setMap(map);
}
},
/**
* Method: startBox
*
* Parameters:
* xy - {<OpenLayers.Pixel>}
*/
startBox: function (xy) {
this.callback("start", []);
this.zoomBox = OpenLayers.Util.createDiv('zoomBox',
new OpenLayers.Pixel(-9999, -9999));
this.zoomBox.className = this.boxDivClassName;
this.zoomBox.style.zIndex = this.map.Z_INDEX_BASE["Popup"] - 1;
this.map.eventsDiv.appendChild(this.zoomBox);
OpenLayers.Element.addClass(
this.map.eventsDiv, "olDrawBox"
);
},
/**
* Method: moveBox
*/
moveBox: function (xy) {
var startX = this.dragHandler.start.x;
var startY = this.dragHandler.start.y;
var deltaX = Math.abs(startX - xy.x);
var deltaY = Math.abs(startY - xy.y);
var offset = this.getBoxOffsets();
this.zoomBox.style.width = (deltaX + offset.width + 1) + "px";
this.zoomBox.style.height = (deltaY + offset.height + 1) + "px";
this.zoomBox.style.left = (xy.x < startX ?
startX - deltaX - offset.left : startX - offset.left) + "px";
this.zoomBox.style.top = (xy.y < startY ?
startY - deltaY - offset.top : startY - offset.top) + "px";
},
/**
* Method: endBox
*/
endBox: function(end) {
var result;
if (Math.abs(this.dragHandler.start.x - end.x) > 5 ||
Math.abs(this.dragHandler.start.y - end.y) > 5) {
var start = this.dragHandler.start;
var top = Math.min(start.y, end.y);
var bottom = Math.max(start.y, end.y);
var left = Math.min(start.x, end.x);
var right = Math.max(start.x, end.x);
result = new OpenLayers.Bounds(left, bottom, right, top);
} else {
result = this.dragHandler.start.clone(); // i.e. OL.Pixel
}
this.removeBox();
this.callback("done", [result]);
},
/**
* Method: removeBox
* Remove the zoombox from the screen and nullify our reference to it.
*/
removeBox: function() {
this.map.eventsDiv.removeChild(this.zoomBox);
this.zoomBox = null;
this.boxOffsets = null;
OpenLayers.Element.removeClass(
this.map.eventsDiv, "olDrawBox"
);
},
/**
* Method: activate
*/
activate: function () {
if (OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
this.dragHandler.activate();
return true;
} else {
return false;
}
},
/**
* Method: deactivate
*/
deactivate: function () {
if (OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
if (this.dragHandler.deactivate()) {
if (this.zoomBox) {
this.removeBox();
}
}
return true;
} else {
return false;
}
},
/**
* Method: getBoxOffsets
* Determines border offsets for a box, according to the box model.
*
* Returns:
* {Object} an object with the following offsets:
* - left
* - right
* - top
* - bottom
* - width
* - height
*/
getBoxOffsets: function() {
if (!this.boxOffsets) {
// Determine the box model. If the testDiv's clientWidth is 3, then
// the borders are outside and we are dealing with the w3c box
// model. Otherwise, the browser uses the traditional box model and
// the borders are inside the box bounds, leaving us with a
// clientWidth of 1.
var testDiv = document.createElement("div");
//testDiv.style.visibility = "hidden";
testDiv.style.position = "absolute";
testDiv.style.border = "1px solid black";
testDiv.style.width = "3px";
document.body.appendChild(testDiv);
var w3cBoxModel = testDiv.clientWidth == 3;
document.body.removeChild(testDiv);
var left = parseInt(OpenLayers.Element.getStyle(this.zoomBox,
"border-left-width"));
var right = parseInt(OpenLayers.Element.getStyle(
this.zoomBox, "border-right-width"));
var top = parseInt(OpenLayers.Element.getStyle(this.zoomBox,
"border-top-width"));
var bottom = parseInt(OpenLayers.Element.getStyle(
this.zoomBox, "border-bottom-width"));
this.boxOffsets = {
left: left,
right: right,
top: top,
bottom: bottom,
width: w3cBoxModel === false ? left + right : 0,
height: w3cBoxModel === false ? top + bottom : 0
};
}
return this.boxOffsets;
},
CLASS_NAME: "OpenLayers.Handler.Box"
});