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-->  <!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"><concept id="GUID-41A36790-CB11-4620-A2D5-1981077E5753" xml:lang="en"><title>Touch

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

<section id="GUID-B8132E14-2B27-4471-BEC8-4975AAB69C76"> <p>In the Symbian

touch UI, there are two main interaction strategies in use: focus and select,

and direct selection. Focus and select emulates the functionality of the scroll

key: the user taps on an item to move the focus to it, and then taps a second

time on the focused item to initiate the action. In direct selection, the

interaction happens on the first contact.</p><ul>

<li><p>In the Symbian touch UI, basic stylus interaction is achieved through

short tap. In a short tap, the stylus is placed down and lifted up again on

the same item within a short period of time. </p></li>

<li><p>When selecting items, for example, from a list, first a short tap moves

the focus onto a given item and the second short tap performs the set function.

There is no time dependency between the taps. </p><fig id="GUID-C31EEFC8-CE88-493E-A5EC-25195B7C01D2">

<image href="GUID-5801535A-3A7E-4E35-97F5-0DC6C7730952_d0e46861_href.png" scale="60" placement="inline"></image>

</fig></li>

<li><p>In some views, for example in the application menu, short tap selects

the item directly</p><fig id="GUID-8FF0F504-3E5F-4973-A7EB-66E850F4698B">

<image href="GUID-60BBE390-0CA5-4064-86E5-39A31CE2AB82_d0e46869_href.png" scale="60" placement="inline"></image>

</fig></li>

</ul><p>Touch down and hold and Touch down and drag are direct selection events,

where the user taps on the screen and holds the touch for a period of time,

or strokes the screen without lifting the stylus up. Touch down and hold can

be used, for example, on lists (see also Lists

API) to open a <xref href="GUID-BB8B3A11-0BBC-4759-A7F4-A28C9E70573F.dita"><b>stylus

pop-up menu</b></xref>. </p><ul>

<li><p><b>Touch and hold</b> functions best as a shortcut to more information

or options, when manipulating an object. However, as it may not be implicit

to the users which items have touch down and hold events attached to them,

the design should not rely solely on the use of these events.</p></li>

<li><p><b>Tap and hold</b> or <b>long tap</b> can be used for providing, for

example, contextual options, stylus pop-up menu or help, which can also be

available through the Options menu. </p></li>

<li><p><b>Touch down and drag</b> can be used, for example, in applications

where users move items from one location to another. </p></li>

<li><p><b>Strokes</b> in different directions or on different areas of the

touch screen can trigger certain actions. For example, in an image viewer

application, the user can swipe the screen with the stylus horizontally to

go to the next or previous image. See <xref scope="external" href="http://www.forum.nokia.com/info/sw.nokia.com/id/567330dd-130f-4f1d-9380-fac5aec5a6a9/S60_Platform_Image_Converter_Example.html">Image converter application</xref> for an example implementation.</p></li>

</ul><p>The Symbian platform provides the possibility of <xref href="GUID-581A8E4B-12BE-41C0-A20E-3087A80FEECF.dita">tactile

feedback</xref> for each touch screen event. For more information, see <xref href="GUID-21DAC50D-7737-42B6-BBDA-E12E8779741B.dita">Feedback</xref>.</p><p>In

addition to the basic touch events and customized strokes, the Symbian platform

supports <b>sensors</b> which allow for more complicated <b>gestures</b>.

Gestures involve interacting with the whole device, such as tapping the side

of the device, or shaking the device. Gestures are not obvious for the user,

and must be either discovered easily, or communicated clearly.</p><p>Sensors

can work together with the UI to allow for more complicated gesture combinations.

When the interaction is based on detecting movement of a handheld device,

the user interface becomes as tangible as the device itself. This provides

a new user interface paradigm where the whole physical device can be used

for performing gestures. For more information, see <xref href="GUID-AE979B97-5610-42F3-99A7-5A3D66D3C2E6.dita">Sensor

interaction</xref>.</p></section>

</conbody></concept>