Created
July 1, 2011 01:14
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Rotation of elements in PhoneGap using CSS transform and PhoneGap Compass API
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<html> | |
<head> | |
<title>Compass Test</title> | |
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0, target-densityDpi=device-dpi" /> | |
<script type="text/javascript" src="phonegap.0.9.6.1.js"></script> | |
<script type="text/javascript"> | |
var d = -45, | |
e = null, | |
w = null; | |
function win(h) { | |
e.style['-webkit-transform'] = 'rotate(' + (d + h) + 'deg)'; | |
} | |
function fail(e) { | |
alert(e); | |
} | |
function setWatch() { | |
if (w) return false; | |
console.log('setting watch'); | |
w = navigator.compass.watchHeading(win,fail); | |
} | |
function clearWatch() { | |
console.log('clearing watch'); | |
navigator.compass.clearWatch(w); | |
w = null; | |
} | |
document.addEventListener('deviceready', function() { | |
e = document.getElementById('square'); | |
setWatch(); | |
}, false); | |
document.addEventListener('pause', function() { | |
console.log('pausing'); | |
clearWatch(); | |
}, false); | |
document.addEventListener('resume', function() { | |
console.log('resuming'); | |
setWatch(); | |
}, false); | |
</script> | |
<style> | |
body { | |
background-color: #EEE; | |
padding:10px; | |
text-align:center; | |
} | |
#square { | |
text-align:center; | |
width:200px; | |
height:200px; | |
background-color: red; | |
border:4px solid black; | |
-webkit-transform:rotate(-45deg); | |
} | |
#square span { | |
float:right; | |
} | |
</style> | |
</head> | |
<body> | |
<div id="square"><span>NORTH</span></div> | |
</body> | |
</html> |
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