click-handler.html

Revision 7095, 9.0 kB (checked in by tschaub, 4 months ago)
giving examples some style
Property svn:eol-style set to `native`

Line
1	<html xmlns="http://www.w3.org/1999/xhtml">
2	<head>
3	<title>OpenLayers Click Handler Example</title>
4
5	<link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
6	<link rel="stylesheet" href="style.css" type="text/css" />
7	<style type="text/css">
8	#map {
9	width: 340px;
10	height: 170px;
11	border: 1px solid gray;
12	}
13	#west {
14	width: 350px;
15	}
16	#east {
17	position: absolute;
18	left: 370px;
19	top: 3em;
20	}
21
22	table td {
23	text-align: center;
24	margin: 0;
25	border: 1px solid gray;
26	}
27	textarea.output {
28	text-align: left;
29	font-size: 0.9em;
30	width: 250px;
31	height: 65px;
32	overflow: auto;
33	}
34	</style>
35	<script src="../lib/Firebug/firebug.js"></script>
36	<script src="../lib/OpenLayers.js"></script>
37	<script type="text/javascript">
38
39	OpenLayers.Control.Click = OpenLayers.Class(OpenLayers.Control, {
40	defaultHandlerOptions: {
41	'single': true,
42	'double': false,
43	'pixelTolerance': 0,
44	'stopSingle': false,
45	'stopDouble': false
46	},
47
48	initialize: function(options) {
49	this.handlerOptions = OpenLayers.Util.extend(
50	{}, this.defaultHandlerOptions
51	);
52	OpenLayers.Control.prototype.initialize.apply(
53	this, arguments
54	);
55	this.handler = new OpenLayers.Handler.Click(
56	this, {
57	'click': this.onClick,
58	'dblclick': this.onDblclick
59	}, this.handlerOptions
60	);
61	},
62
63	onClick: function(evt) {
64	var output = document.getElementById(this.key + "Output");
65	var msg = "click " + evt.xy;
66	output.value = output.value + msg + "\r\n";
67	},
68
69	onDblclick: function(evt) {
70	var output = document.getElementById(this.key + "Output");
71	var msg = "dblclick " + evt.xy;
72	output.value = output.value + msg + "\n";
73	}
74
75	});
76
77	var map, controls;
78
79	function init(){
80
81	map = new OpenLayers.Map('map');
82	var layer = new OpenLayers.Layer.WMS(
83	"OpenLayers WMS",
84	"http://labs.metacarta.com/wms/vmap0",
85	{layers: 'basic'}
86	);
87	map.addLayers([layer]);
88
89	controls = {
90	"single": new OpenLayers.Control.Click({
91	hanlerOptions: {
92	"single": true
93	}
94	}),
95	"double": new OpenLayers.Control.Click({
96	handlerOptions: {
97	"single": false,
98	"double": true
99	}
100	}),
101	"both": new OpenLayers.Control.Click({
102	handlerOptions: {
103	"single": true,
104	"double": true
105	}
106	}),
107	"drag": new OpenLayers.Control.Click({
108	handlerOptions: {
109	"single": true,
110	"pixelTolerance": null
111	}
112	}),
113	"stopsingle": new OpenLayers.Control.Click({
114	handlerOptions: {
115	"single": true,
116	"stopSingle": true
117	}
118	}),
119	"stopdouble": new OpenLayers.Control.Click({
120	handlerOptions: {
121	"single": false,
122	"double": true,
123	"stopDouble": true
124	}
125	})
126	};
127
128	var props = document.getElementById("props");
129	var control;
130	for(var key in controls) {
131	control = controls[key];
132	// only to route output here
133	control.key = key;
134	map.addControl(control);
135	}
136
137	map.zoomToMaxExtent();
138	}
139
140	function toggle(key) {
141	var control = controls[key];
142	if(control.active) {
143	control.deactivate();
144	} else {
145	control.activate();
146	}
147	var status = document.getElementById(key + "Status");
148	status.innerHTML = control.active ? "on" : "off";
149	var output = document.getElementById(key + "Output");
150	output.value = "";
151	}
152	</script>
153	</head>
154	<body onload="init()">
155	<h1 id="title">Click Handler Example</h1>
156	<div id="west">
157
158	<div id="tags">
159	</div>
160
161	<p id="shortdesc">
162	This example shows the use of the click handler.
163	</p>
164
165	<div id="map" class="smallmap"></div>
166	<p>
167	The click handler can be used to gain more flexibility over handling
168	click events. The handler can be constructed with options to handle
169	only single click events, to handle single and double-click events,
170	to ignore clicks that include a drag, and to stop propagation of
171	single and/or double-click events. A single click is a click that
172	is not followed by another click for more than 300ms. This delay
173	is configured with the delay property.
174	</p>
175	<p>
176	The options to stop single and double clicks have to do with
177	stopping event propagation on the map events listener queue
178	(not stopping events from cascading to other elements). The
179	ability to stop an event from propagating has to do with the
180	order in which listeners are registered. With stopSingle or
181	stopDouble true, a click handler will stop propagation to all
182	listeners that were registered (or all handlers that were
183	activated) before the click handler was activated. So, for
184	example, activating a click handler with stopDouble true after
185	the navigation control is active will stop double-clicks from
186	zooming in.
187	</p>
188	</div>
189	<div id="east">
190	<table>
191	<caption>Controls with click handlers (toggle on/off to clear output)</caption>
192	<tbody>
193	<tr>
194	<td>single only</td>
195	<td><button id="singleStatus" onclick="toggle('single')">off</button></td>
196	<td><textarea class="output" id="singleOutput"></textarea></td>
197	</tr>
198	<tr>
199	<td>double only</td>
200	<td><button id="doubleStatus" onclick="toggle('double')">off</button></td>
201	<td><textarea class="output" id="doubleOutput"></textarea></td>
202	</tr>
203	<tr>
204	<td>both</td>
205	<td><button id="bothStatus" onclick="toggle('both')">off</button></td>
206	<td><textarea class="output" id="bothOutput"></textarea></td>
207	</tr>
208	<tr>
209	<td>single with drag</td>
210	<td><button id="dragStatus" onclick="toggle('drag')">off</button></td>
211	<td><textarea class="output" id="dragOutput"></textarea></td>
212	</tr>
213	<tr>
214	<td>single with stop</td>
215	<td><button id="stopsingleStatus" onclick="toggle('stopsingle')">off</button></td>
216	<td><textarea class="output" id="stopsingleOutput"></textarea></td>
217	</tr>
218	<tr>
219	<td>double with stop</td>
220	<td><button id="stopdoubleStatus" onclick="toggle('stopdouble')">off</button></td>
221	<td><textarea class="output" id="stopdoubleOutput"></textarea></td>
222	</tr>
223	</tbody>
224	</table>
225	</div>
226	</body>
227	</html>

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