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[mediaqueries-4] add example of 'pointer: none' to table, add note about how UA could determine "primary" input #739

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Merged
merged 3 commits into from
Nov 22, 2016
Merged

[mediaqueries-4] add example of 'pointer: none' to table, add note about how UA could determine "primary" input #739

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ba0adc4
Add pointer:none examples, expand stylus examples
patrickhlauke Nov 19, 2016
d891221
Add expansion/clarfication about "primary" input
patrickhlauke Nov 19, 2016
071e132
fix linewrapping
tabatkins Nov 22, 2016
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22 changes: 17 additions & 5 deletions mediaqueries/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -1571,23 +1571,23 @@ Interaction Media Features</h2>
Typical examples of devices matching combinations of 'pointer' and 'hover':

<table class=data>
<col>
<col></col>
<col></col>
<thead>
<tr>
<td>
<th>''pointer: none''
<th>''pointer: coarse''
<th>''pointer: fine''
<tbody>
<tr>
<th scope=row>''hover: none''
<td>keyboard-only controls, sequential/spatial (d-pad) focus navigation
<td>smartphones, touch screens
<td>stylus-based screens (Cintiq, Wacom, etc)
<td>basic stylus digitizers (Cintiq, Wacom, etc)
<tr>
<th scope=row>''hover: hover''
<td>
<td>Nintendo Wii controller, Kinect
<td>mouse, touch pad
<td>mouse, touch pad, advanced stylus digitizers (Surface, Samsung Note, Wacom Intuos Pro, etc)
</table>
<style>
#pointer-hover-table { margin: 1em auto; text-align: center; border-collapse: collapse; max-width: 40em; }
Expand All @@ -1597,6 +1597,18 @@ Interaction Media Features</h2>
</style>
</div>

The 'pointer' and 'hover' features relate to the characteristics of the “primary” input mechanism,
while 'any-pointer' and 'any-hover' can be used to query the properties of all potentially available input mechanisms.

Note: While this specification does not define how User Agents should decide what the “primary” input is,
the expectation is that User Agents should make this determination
by combining knowledge about the device/environment they are running on,
the number and type of input mechanisms available,
and a notion of which of these inputs is generally and/or currently being used.
User Agents may also decide to dynamically change what type of input is deemed to be primary,
in response to changes in the user environment
or in the way the user is interacting with the UA.

<h3 id="pointer">
Pointing Device Quality: the 'pointer' feature</h3>

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