Mobile Device Features 2: Difference between revisions
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(Created page with "= Compass = * Certain devices have built in compasses * If they do, they call the ondeviceorientation() function when the compass reading changes. * An event object is pass...") |
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= Compass = | = Compass = | ||
* Certain devices have built in compasses | * Certain devices have a built in compasses | ||
* If they do, they call the ondeviceorientation() function when the compass reading changes. | * If they do, they call the ondeviceorientation() function when the compass reading changes. | ||
Revision as of 21:50, 10 December 2013
Compass
- Certain devices have a built in compasses
- If they do, they call the ondeviceorientation() function when the compass reading changes.
- An event object is passed to the function with the compass reading in evt.webkitCompassHeading.
function window_ondeviceorientation(evt)
TextBox1.value=evt.webkitCompassHeading
End function
<pre>
* The Compass sample uses this information to rotate an image of a compass.
* The webKitTransform function rotates an image efficiently.
<pre>
pos="0"
function window_ondeviceorientation(e)
imgCompass.style.webkitTransform="rotate(" & pos & "deg)"
pos = e.webkitCompassHeading
imgCompass.style.webkitTransform="rotate(-" & pos & "deg)"
End function