author | Dominic Pinkman <Dominic.Pinkman@Nokia.com> |
Thu, 11 Mar 2010 18:02:22 +0000 | |
changeset 3 | 46218c8b8afa |
parent 1 | 25a17d01db0c |
permissions | -rw-r--r-- |
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<?xml version="1.0" encoding="utf-8"?> |
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. --> |
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<!-- This component and the accompanying materials are made available under the terms of the License |
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"Eclipse Public License v1.0" which accompanies this distribution, |
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". --> |
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<!-- Initial Contributors: |
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Nokia Corporation - initial contribution. |
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Contributors: |
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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 |
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strategies</title><prolog><metadata><keywords></keywords></metadata></prolog><conbody> |
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<section id="GUID-B8132E14-2B27-4471-BEC8-4975AAB69C76"> <p>In the Symbian |
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touch UI, there are two main interaction strategies in use: focus and select, |
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and direct selection. Focus and select emulates the functionality of the scroll |
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key: the user taps on an item to move the focus to it, and then taps a second |
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time on the focused item to initiate the action. In direct selection, the |
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interaction happens on the first contact.</p><ul> |
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<li><p>In the Symbian touch UI, basic stylus interaction is achieved through |
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short tap. In a short tap, the stylus is placed down and lifted up again on |
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the same item within a short period of time. </p></li> |
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<li><p>When selecting items, for example, from a list, first a short tap moves |
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the focus onto a given item and the second short tap performs the set function. |
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There is no time dependency between the taps. </p><fig id="GUID-C31EEFC8-CE88-493E-A5EC-25195B7C01D2"> |
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<image href="GUID-5801535A-3A7E-4E35-97F5-0DC6C7730952_d0e71836_href.png" scale="60" placement="inline"></image> |
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</fig></li> |
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<li><p>In some views, for example in the application menu, short tap selects |
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the item directly</p><fig id="GUID-8FF0F504-3E5F-4973-A7EB-66E850F4698B"> |
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<image href="GUID-60BBE390-0CA5-4064-86E5-39A31CE2AB82_d0e71844_href.png" scale="60" placement="inline"></image> |
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</fig></li> |
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</ul><p>Touch down and hold and Touch down and drag are direct selection events, |
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where the user taps on the screen and holds the touch for a period of time, |
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or strokes the screen without lifting the stylus up. Touch down and hold can |
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be used, for example, on lists (see also Lists |
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API) to open a <xref href="GUID-BB8B3A11-0BBC-4759-A7F4-A28C9E70573F.dita"><b>stylus |
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pop-up menu</b></xref>. </p><ul> |
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<li><p><b>Touch and hold</b> functions best as a shortcut to more information |
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or options, when manipulating an object. However, as it may not be implicit |
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to the users which items have touch down and hold events attached to them, |
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the design should not rely solely on the use of these events.</p></li> |
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<li><p><b>Tap and hold</b> or <b>long tap</b> can be used for providing, for |
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example, contextual options, stylus pop-up menu or help, which can also be |
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available through the Options menu. </p></li> |
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<li><p><b>Touch down and drag</b> can be used, for example, in applications |
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where users move items from one location to another. </p></li> |
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<li><p><b>Strokes</b> in different directions or on different areas of the |
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touch screen can trigger certain actions. For example, in an image viewer |
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application, the user can swipe the screen with the stylus horizontally to |
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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> |
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</ul><p>The Symbian platform provides the possibility of <xref href="GUID-581A8E4B-12BE-41C0-A20E-3087A80FEECF.dita">tactile |
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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 |
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addition to the basic touch events and customized strokes, the Symbian platform |
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supports <b>sensors</b> which allow for more complicated <b>gestures</b>. |
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Gestures involve interacting with the whole device, such as tapping the side |
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of the device, or shaking the device. Gestures are not obvious for the user, |
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and must be either discovered easily, or communicated clearly.</p><p>Sensors |
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can work together with the UI to allow for more complicated gesture combinations. |
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When the interaction is based on detecting movement of a handheld device, |
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the user interface becomes as tangible as the device itself. This provides |
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a new user interface paradigm where the whole physical device can be used |
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for performing gestures. For more information, see <xref href="GUID-AE979B97-5610-42F3-99A7-5A3D66D3C2E6.dita">Sensor |
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interaction</xref>.</p></section> |
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</conbody></concept> |