- From: Mercurial notifier <cvsmail@w3.org>
- Date: Thu, 10 Jan 2013 12:43:05 +0000
- To: public-dap-commits@w3.org
changeset: 329:1c5fc74bd529
tag: tip
user: Anssi Kostiainen <anssi.kostiainen@nokia.com>
date: Thu Jan 10 14:41:23 2013 +0200
files: light/Overview.html
description:
address Tab's editorial comments re intros, notes <http://lists.w3.org/Archives/Public/public-device-apis/2012Dec/0050.html>
diff -r 51296676e203 -r 1c5fc74bd529 light/Overview.html
--- a/light/Overview.html Thu Jan 10 13:29:01 2013 +0200
+++ b/light/Overview.html Thu Jan 10 14:41:23 2013 +0200
@@ -52,31 +52,12 @@
<section class="informative">
<h2>Introduction</h2>
<p>
- The <a>DeviceLightEvent</a> interface provides web developers
- information about the ambient light levels near the
- hosting in terms of lux units.
- </p>
- <p>
- The <a>LightLevelEvent</a> interface provides web
- developers information about the ambient light
- levels near the hosting in terms of general ranges.
- </p>
- <p>
- The values of the <a>LightLevelEvent</a> event may
- be "normal", "dim", or "bright". "bright" is
- supposed to mean "direct sunlight, or similarly
- bright conditions that make it hard to see things
- that aren't high-contrast". "dim" is supposed to
- mean "dark enough that the light produced by a white
- background is eye-straining or distracting". The
- lux values for "dim" typical begin below 50, and the
- values for "bright" begin above 10000.
- </p>
-
-
- <p>
- This is achieved by interrogating a photosensors or similar detectors
- of a device.
+ This specification defines events that provide information about the
+ ambient light level, as measured by a device's light sensor. A
+ <a>LightLevelEvent</a> describes the light level as one of three simple
+ categories - "dim", "normal", and "bright" - while a
+ <a>DeviceLightEvent</a> provides a more granular answer by describing
+ the light level in terms of lux units.
</p>
</section>
@@ -130,6 +111,11 @@
<section>
<h2>Device Light</h2>
<p>
+ The <a>DeviceLightEvent</a> interface provides information about the
+ ambient light levels, as detected by the device's light detector, in
+ terms of lux units.
+ </p>
+ <p>
The HTML5 specification [[!HTML5]] defines a <a>Window</a> interface,
which this specification extends:
</p>
@@ -166,6 +152,11 @@
object is created, this attribute MUST be initialized to positive
Infinity. It represents the <a>current light level</a>.
</p>
+ <div class="note">
+ The precise lux value reported by different devices in the same light
+ can be different, due to differences in detection method, sensor
+ construction etc.
+ </div>
<p>
When a <dfn>user agent</dfn> is required to <dfn>fire a device
light event</dfn>, the <dfn>user agent</dfn> MUST run the
@@ -226,6 +217,11 @@
<section>
<h2>Light Level</h2>
<p>
+ The <a>LightLevelEvent</a> interface provides information about the
+ ambient light levels, as detected by the device's light detector, in
+ terms of three general range: "dim", "normal", or "bright".
+ </p>
+ <p>
The HTML5 specification [[!HTML5]] defines a <a>Window</a> interface,
which this specification extends:
</p>
@@ -301,8 +297,13 @@
<li><code>bright</code></li>
</ul>
<div class="note">
- The lux ranges that map to the <a>current light level state</a>s
- are left to the implementation.
+ The lux ranges that map to the <a>current light level
+ state</a>s are left to the implementation, as devices with
+ different sensitivities could map them slightly differently.
+ However, it is recommended that "dim" correspond to ambient
+ light below 50 lux, "normal" correspond to light between
+ 50 lux and 10000 lux, and "bright" correspond to light
+ above 10000 lux.
</div>
</li>
</ol>
Received on Thursday, 10 January 2013 12:43:06 UTC