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
|
/* 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/Events.js
*/
/**
* Class: OpenLayers.Events.buttonclick
* Extension event type for handling buttons on top of a dom element. This
* event type fires "buttonclick" on its <target> when a button was
* clicked. Buttons are detected by the "olButton" class.
*
* This event type makes sure that button clicks do not interfere with other
* events that are registered on the same <element>.
*
* Event types provided by this extension:
* - *buttonclick* Triggered when a button is clicked. Listeners receive an
* object with a *buttonElement* property referencing the dom element of
* the clicked button, and an *buttonXY* property with the click position
* relative to the button.
*/
OpenLayers.Events.buttonclick = OpenLayers.Class({
/**
* Property: target
* {<OpenLayers.Events>} The events instance that the buttonclick event will
* be triggered on.
*/
target: null,
/**
* Property: events
* {Array} Events to observe and conditionally stop from propagating when
* an element with the olButton class (or its olAlphaImg child) is
* clicked.
*/
events: [
'mousedown', 'mouseup', 'click', 'dblclick',
'touchstart', 'touchmove', 'touchend', 'keydown'
],
/**
* Property: startRegEx
* {RegExp} Regular expression to test Event.type for events that start
* a buttonclick sequence.
*/
startRegEx: /^mousedown|touchstart$/,
/**
* Property: cancelRegEx
* {RegExp} Regular expression to test Event.type for events that cancel
* a buttonclick sequence.
*/
cancelRegEx: /^touchmove$/,
/**
* Property: completeRegEx
* {RegExp} Regular expression to test Event.type for events that complete
* a buttonclick sequence.
*/
completeRegEx: /^mouseup|touchend$/,
/**
* Property: startEvt
* {Event} The event that started the click sequence
*/
/**
* Constructor: OpenLayers.Events.buttonclick
* Construct a buttonclick event type. Applications are not supposed to
* create instances of this class - they are created on demand by
* <OpenLayers.Events> instances.
*
* Parameters:
* target - {<OpenLayers.Events>} The events instance that the buttonclick
* event will be triggered on.
*/
initialize: function(target) {
this.target = target;
for (var i=this.events.length-1; i>=0; --i) {
this.target.register(this.events[i], this, this.buttonClick, {
extension: true
});
}
},
/**
* Method: destroy
*/
destroy: function() {
for (var i=this.events.length-1; i>=0; --i) {
this.target.unregister(this.events[i], this, this.buttonClick);
}
delete this.target;
},
/**
* Method: getPressedButton
* Get the pressed button, if any. Returns undefined if no button
* was pressed.
*
* Arguments:
* element - {DOMElement} The event target.
*
* Returns:
* {DOMElement} The button element, or undefined.
*/
getPressedButton: function(element) {
var depth = 3, // limit the search depth
button;
do {
if(OpenLayers.Element.hasClass(element, "olButton")) {
// hit!
button = element;
break;
}
element = element.parentNode;
} while(--depth > 0 && element);
return button;
},
/**
* Method: ignore
* Check for event target elements that should be ignored by OpenLayers.
*
* Parameters:
* element - {DOMElement} The event target.
*/
ignore: function(element) {
var depth = 3,
ignore = false;
do {
if (element.nodeName.toLowerCase() === 'a') {
ignore = true;
break;
}
element = element.parentNode;
} while (--depth > 0 && element);
return ignore;
},
/**
* Method: buttonClick
* Check if a button was clicked, and fire the buttonclick event
*
* Parameters:
* evt - {Event}
*/
buttonClick: function(evt) {
var propagate = true,
element = OpenLayers.Event.element(evt);
if (element && (OpenLayers.Event.isLeftClick(evt) || !~evt.type.indexOf("mouse"))) {
// was a button pressed?
var button = this.getPressedButton(element);
if (button) {
if (evt.type === "keydown") {
switch (evt.keyCode) {
case OpenLayers.Event.KEY_RETURN:
case OpenLayers.Event.KEY_SPACE:
this.target.triggerEvent("buttonclick", {
buttonElement: button
});
OpenLayers.Event.stop(evt);
propagate = false;
break;
}
} else if (this.startEvt) {
if (this.completeRegEx.test(evt.type)) {
var pos = OpenLayers.Util.pagePosition(button);
var viewportElement = OpenLayers.Util.getViewportElement();
var scrollTop = window.pageYOffset || viewportElement.scrollTop;
var scrollLeft = window.pageXOffset || viewportElement.scrollLeft;
pos[0] = pos[0] - scrollLeft;
pos[1] = pos[1] - scrollTop;
this.target.triggerEvent("buttonclick", {
buttonElement: button,
buttonXY: {
x: this.startEvt.clientX - pos[0],
y: this.startEvt.clientY - pos[1]
}
});
}
if (this.cancelRegEx.test(evt.type)) {
delete this.startEvt;
}
OpenLayers.Event.stop(evt);
propagate = false;
}
if (this.startRegEx.test(evt.type)) {
this.startEvt = evt;
OpenLayers.Event.stop(evt);
propagate = false;
}
} else {
propagate = !this.ignore(OpenLayers.Event.element(evt));
delete this.startEvt;
}
}
return propagate;
}
});
|
