Instantly share code, notes, and snippets.

@mbostock /.block
Last active Nov 10, 2018

Embed
What would you like to do?
Resizable Markers
license: gpl-3.0

A quick example demonstrating the use of "show" event handlers and reshow, which allows you to restyle GeoJSON features dynamically from an external event. In this example, you can use the jQuery UI slider in the top-left corner to resize the points.

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="https://cdn.rawgit.com/simplegeo/polymaps/v2.3.0/polymaps.min.js"></script>
<script type="text/javascript" src="https://cdn.rawgit.com/simplegeo/polymaps/v2.3.0/lib/crimespotting/crimespotting.js"></script>
<script type="text/javascript" src="https://cdn.rawgit.com/protovis/protovis/v3.3.1/examples/jquery-1.4.2.min.js"></script>
<script type="text/javascript" src="https://cdn.rawgit.com/protovis/protovis/v3.3.1/examples/slider/jquery-ui-1.8rc3.custom.min.js"></script>
<style type="text/css">
@import url("https://cdn.rawgit.com/simplegeo/polymaps/v2.3.0/examples/example.css");
@import url("https://cdn.rawgit.com/protovis/protovis/v3.3.1/examples/slider/ui-lightness/jquery-ui-1.8rc3.custom.css");
html, body {
height: 100%;
background: #E6E6E6;
}
svg {
display: block;
}
.layer circle {
fill: lightcoral;
fill-opacity: .5;
stroke: brown;
}
#slider {
position: absolute;
top: 10px;
left: 10px;
width: 300px;
height: 20px;
display: block;
background: #ccc;
}
.ui-slider {
font-size: 10px;
margin-top: 5px;
}
.ui-state-focus {
outline: none;
}
</style>
</head>
<body>
<script type="text/javascript">
var po = org.polymaps;
var r = 4.5;
var map = po.map()
.container(document.body.appendChild(po.svg("svg")))
.center({lat: 37.787, lon: -122.228})
.zoomRange([10, 16])
.add(po.interact());
map.add(po.image()
.url(po.url("http://{S}tile.cloudmade.com"
+ "/1a1b06b230af4efdbb989ea99e9841af" // http://cloudmade.com/register
+ "/998/256/{Z}/{X}/{Y}.png")
.hosts(["a.", "b.", "c.", ""])));
map.add(geoJson = po.geoJson()
.url(crimespotting("http://oakland.crimespotting.org"
+ "/crime-data"
+ "?count=100"
+ "&format=json"
+ "&bbox={B}"
+ "&dstart=2010-04-01"
+ "&dend=2010-04-01"))
.on("show", show)
.clip(false)
.scale("fixed")
.zoom(12));
/* Resize the GeoJSON points! */
function show(e) {
for (var i = 0; i < e.features.length; i++) {
e.features[i].element.setAttribute("r", r);
}
}
</script>
<div id="slider"></div>
<script type="text/javascript">
$("#slider").slider({
min: 0, max: 1000, value: r * r, slide: function(e, ui) {
r = Math.sqrt(ui.value);
geoJson.reshow();
}
});
</script>
<span id="copy">
&copy; 2010
<a href="http://www.cloudmade.com/">CloudMade</a>,
<a href="http://www.openstreetmap.org/">OpenStreetMap</a> contributors,
<a href="http://creativecommons.org/licenses/by-sa/2.0/">CCBYSA</a>.
</span>
</body>
</html>
@c0mbinatr0nics

This comment has been minimized.

c0mbinatr0nics commented Nov 10, 2018

http://rawgit.com is end of life, http://combinatronics.com is a drop in replacement.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment