<?xml version="1.0" encoding="utf-8"?>

<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

<!-- This component and the accompanying materials are made available under the terms of the License 

"Eclipse Public License v1.0" which accompanies this distribution, 

and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

<!-- Initial Contributors:

    Nokia Corporation - initial contribution.

Contributors: 

-->

<!DOCTYPE concept

  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

<concept id="GUID-581A8E4B-12BE-41C0-A20E-3087A80FEECF" xml:lang="en"><title>Tactile

feedback</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>There are two cases where vibration or audio of the device is used as an

output method:</p>

<ul>

<li><p>As a <i>tacticon</i> to inform users through physical feedback, that

an important event is occurring in the device. For example, when a new message

arrives or a warning note is displayed.</p></li>

<li><p>As <i>tactile feedback</i> to indicate to the user that an interaction

event has been made. For example, users receive tactile feedback when they

press a button on the touch screen.</p></li>

</ul>

<p>As with sounds, tactile feedback must be used carefully so as not to desensitize

the user to the vibration; the attention grabbing quality remains and functions

so long as the feedback is not too frequent.</p>

<p>Tactile feedback is enabled for all the Symbian platform UI components.

Tactile feedback can be disabled for the common UI components in an application.

However, this is acceptable only if tactile feedback causes interference with

other device functions.</p>

<p>The user can choose the level of tactile feedback and turn tacticons ON

and OFF.</p>

<p>The following table lists the tactile feedback effects:</p>

<p><table id="GUID-4969AEA7-3BE4-4644-8232-1FA26D49010B"><title>Tactile feedback

effects</title>

<tgroup cols="2"><colspec colname="col1" colwidth="0.40*"/><colspec colname="col2" colwidth="1.60*"/>

<thead>

<row>

<entry valign="top"><p>Effects</p></entry>

<entry valign="top"><p>Description</p></entry>

</row>

</thead>

<tbody>

<row>

<entry><p><b>Sensitive button</b></p></entry>

<entry><p>Provides single pulse effect on repeated key presses with buttons.

It is also possible with other similar components.</p></entry>

</row>

<row>

<entry><p><b>Basic button</b></p></entry>

<entry><p>Provides stronger single pulse effect to buttons. It is also possible

with other similar components.</p></entry>

</row>

<row>

<entry><p><b>Sensitive list</b></p></entry>

<entry><p>Provides single pulse effect to lists and grids. Effect is used

with move (drag and flick) when new item appears on the screen.</p></entry>

</row>

<row>

<entry><p><b>Basic list</b></p></entry>

<entry><p>Provides stronger single pulse effect to lists and grids. Effect

is used with touch down and release when tap makes an action. </p><p>In hierarchical

list, collapsing/expanding item provides basic list effect with touch down

and release.</p></entry>

</row>

<row>

<entry><p><b>Bounce effect</b></p></entry>

<entry><p>Provides pulse effect when list returns to its normal state after

boundary effect.</p></entry>

</row>

<row>

<entry><p><b>Sensitive slider</b></p></entry>

<entry><p>Provides pulse effect with scrollbar and slider thumbs. Effect is

provided with touch down and release in thumb area.</p></entry>

</row>

<row>

<entry><p><b>Smooth slider</b></p></entry>

<entry><p>Provides continuous smooth feedback when dragging scrollbar or slider

thumb. This can also be increasing or decreasing depending of the slider type.</p></entry>

</row>

<row>

<entry><p><b>Hold slider</b></p></entry>

<entry><p>Provides sensitive pulse effect when touch down and hold on the

slider or scrollbar area. Slider thumb starts moving step by step towards

the touch point. Every step gives one sensitive pulse. If slider thumb moves

directly to the touch point, then basic slider effect is provided.</p></entry>

</row>

<row>

<entry><p><b>Pop-up</b></p></entry>

<entry><p>Provides sensitive pulse effect when pop-up is opened or closed.

If the theme animations are ON, then pop-up effect is used with opening event

after increasing long touch effect. In this scenario, there is no pop-up effect

. <note> All pop-ups do not have theme animation.</note></p></entry>

</row>

<row>

<entry><p><b>Pop-up close</b></p></entry>

<entry><p>Provides decreasing smooth feedback  a pop-up and when theme animations

are ON.</p></entry>

</row>

<row>

<entry><p><b>Increasing long touch</b></p></entry>

<entry><p>Provides increasing smooth feedback. This can be used with either

long tap animation or pop-up opening theme effects. If the theme effects are

ON and long tap opens a pop-up, then feedback is provided only with long tap.

This is followed by pop-up.</p></entry>

</row>

<row>

<entry><p><b>Basic tab</b></p></entry>

<entry><p>Provides strong pulse effect with touch down event in tab area.</p></entry>

</row>

<row>

<entry><p><b>Smooth flick</b></p></entry>

<entry><p>Provides smooth feedback with drag when horizontal movement is possible.</p></entry>

</row>

<row>

<entry><p><b>Sensitive flick</b></p></entry>

<entry><p>Provides sensitive pulse effect with touch release when horizontal

movement is possible.</p></entry>

</row>

<row>

<entry><p><b>Sensitive edit</b></p></entry>

<entry><p>Provides sensitive pulse effect in editors with touch down and release.</p></entry>

</row>

<row>

<entry><p><b>Text edit</b></p></entry>

<entry><p>Provides pulse effect when painting the text. Effect is provided

with every character while painting the text.</p></entry>

</row>

<row>

<entry><p><b>Blank edit</b></p></entry>

<entry><p>Provides pulse effect when painting blank character. By default,

it is none.</p></entry>

</row>

<row>

<entry><p><b>Line edit</b></p></entry>

<entry><p>Provides pulse effect when painting a line.</p></entry>

</row>

<row>

<entry><p><b>Empty line</b></p></entry>

<entry><p>Provides pulse effect when painting an empty line. By default, it

is none.</p></entry>

</row>

<row>

<entry><p><b>Check box</b></p></entry>

<entry><p>Provides pulse effect when marking/unmarking a check box.</p></entry>

</row>

<row>

<entry><p><b>Multi-touch recognition</b></p></entry>

<entry><p>Provides double pulse (sensitive + sensitive) effect when multi-touch

is recognized (generally, when second finger is touched down).</p></entry>

</row>

<row>

<entry><p><b>Smooth pinch</b></p></entry>

<entry><p>Provides smooth continuous feedback while moving fingers in multi-touch

pinch situation.</p></entry>

</row>

<row>

<entry><p><b>Smooth rotate</b></p></entry>

<entry><p>Provides smooth continuous feedback  while moving fingers in multi-touch

rotate situation.</p></entry>

</row>

</tbody>

</tgroup>

</table></p>

<section id="GUID-1EB54408-100B-4E4F-8D56-E13C26CA3B96"><title>Haptics concept</title><p>The different senses associated

to the skin are called cutaneous senses. These senses are temperature, pressure

(touch itself), pain, tickle, itch and vibration senses. We can characterize

touch as passive or active. Passive touch means the sense of touch itself,

whereas active touch means the touch action.</p><p>To communicate through

the sense of touch, we have to stimulate some of the cutaneous senses or the

movement sense. The stimulation of the cutaneous senses or one of them by

a product is called tactile stimulation. Respectively, the stimulation of

the movement sense by a product is called haptic stimulation or just haptics.

Haptics is also used as general term for all issues related to sense of touch,

both human and machine.</p><p>Haptic feedback, often referred to as "Haptics",

is the use of the sense of touch in a user interface design to provide information

to an end user. In mobile phones, this generally means the use of vibrations

from the device's vibration alarm to denote that a touch screen button has

been pressed. In this particular example, the phone would vibrate slightly

in response to the user's activation of an on-screen control, making up for

the lack of a normal tactile response that the user would experience when

pressing a physical button.</p></section>

<section id="GUID-B9A35CA3-B830-4D97-9B0A-E22DC4A3CDA1"><title>Characteristics

of haptics related  APIs</title><p>You can use the following APIs to create

haptic effects:</p><ul>

<li><p><xref href="GUID-8661A7E0-F19A-41F8-9062-FBFAE70CF658.dita">Tactile Feedback

Client API</xref></p><ul>

<li><p>Available from S60 5th Edition onwards.</p></li>

<li><p>It can be used on all S60 5th Edition or later mobile devices. However,

the feedback is played only on touch enabled layouts.</p></li>

<li><p>Provides simple functions for triggering various predefined tactile

feedback (vibration or audio) effects.</p></li>

<li><p>Enables a consistent user experience in all applications of the mobile

device (an application gives a logical feedback type as an input and the actual

physical effect depends on the mobile device configuration and end user settings).</p></li>

<li><p>When the area feedback is used, latency is low for the feedback triggering

(a tactile feedback can already be triggered at the window server level prior

to the corresponding pointer event being delivered to the visible application).</p></li>

<li><p>Direct feedback can be easily integrated into <xref href="GUID-B06F99BD-F032-3B87-AB26-5DD6EBE8C160.dita#GUID-B06F99BD-F032-3B87-AB26-5DD6EBE8C160/GUID-5CF90E7A-4A91-36FF-BB3F-CF7CF687DED2"><apiname>CCoeControl::HandlePointerEventL()</apiname></xref>. </p></li>

<li><p>An application can select the logical tactile feedback from certain

types. The produced effect may be different on various mobile devices.</p></li>

</ul></li>

<li><p><xref href="jar:GUID-558A5A9B-811E-4A87-B3DD-AE734C9AA966.jar!/public_specs/GuidesA/Haptics_API_Specification/Haptics_API_Specification.html" format="application/java-archive">Haptics

API</xref></p><ul>

<li><p>Available from S60 5th Edition, FP2 onwards.</p></li>

<li><p>It can be used in touch and hybrid mobile devices.</p></li>

<li><p>Provides an interface for accessing Haptics player that can control

different actuator types.</p></li>

<li><p>Enables producing of complex vibrator effects, such as an explosion

or machine gun effect in a game, bass boost for a music player, advanced ringing

tone vibration, and so on.</p></li>

<li><p>Enables simultaneous playing of different kinds of basis effects and

modifying them when played. </p></li>

<li><p>Allows the design of complex effects (using a separate PC application)

that can be loaded on Haptics player for playing.</p></li>

<li><p>It may require a special license key  for third-party applications

(to be set at runtime) to enable the Haptics player functionality.</p></li>

</ul></li>

<li><p><xref href="GUID-D53A00E4-CF37-5F11-8D15-C5ECCCE64597.dita">Vibra API</xref></p><ul>

<li><p>Available from S60 3.0 onwards.</p></li>

<li><p>It can be used for running device vibrator with given intensity for

a given period of time.</p></li>

<li><p>It can be used by a privileged client application to play pulse effects,

which have a very short duration (as the ones used for tactile feedback).</p></li>

</ul></li>

</ul></section>

<section id="GUID-428F693C-1CA8-4588-9A7D-C4265D2AED91"><title>When to use

Tactile Feedback Client API, Haptics API, and Vibra API</title><p><ul>

<li><p>Tactile Feedback Client API for providing tactile feedback in custom

controls (grids, lists, and so on), which will comply with the style of Core

UI components to ensure a uniform user experience among applications.</p></li>

<li><p>Haptics API on touch and hybrid mobile devices for producing complex

vibration feedback, which cannot be achieved with Tactile Framework (games,

simulations, demos, and so on).</p></li>

<li><p>Vibra API for producing haptic effects such as ringing tone vibration

in those mobile devices where Haptics API is not available or functional.</p></li>

</ul></p></section>

<section id="GUID-8334E102-8F04-4726-9CD2-1D8004A417E1"><title>Using

tactile feedback in applications</title><p>The API to use for tactile feedback

is the <xref href="GUID-8661A7E0-F19A-41F8-9062-FBFAE70CF658.dita">Tactile feedback

client API</xref>.</p><p>The Symbian platform includes a tactile feedback

interface to add, modify and remove feedback areas in the registry. There

is also an option to trigger direct feedback and bypass the registry. <xref href="GUID-766333D1-8D66-3B81-9B5D-8C4245F78298.dita#GUID-766333D1-8D66-3B81-9B5D-8C4245F78298/GUID-962B6543-9A59-3E72-893D-F775FEC54ACB"><apiname>MTouchFeedback::Instance()</apiname></xref> is

used for acquiring a pointer to a touch feedback instance. When touch feedback

is activated, the mobile device users get a slight vibration when the control

with the feedback interface is touched. </p><note><p>Tactile feedback can

be set and disabled in a client application or a mobile device in some scenarios,

for example, during phone calls.</p></note><p>Client applications cannot determine

the actual physical feedback that is generated. It depends on device configuration

and current settings. In current devices, the user changeable settings include

vibration and audio feedback intensity level.</p><p>For more information,

see <xref href="GUID-21DAC50D-7737-42B6-BBDA-E12E8779741B.dita">Feedback</xref>.</p></section>