author | Dominic Pinkman <Dominic.Pinkman@Nokia.com> |
Wed, 31 Mar 2010 11:11:55 +0100 | |
changeset 7 | 51a74ef9ed63 |
permissions | -rw-r--r-- |
7
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Week 12 contribution of API Specs and fix SDK submission
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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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--> |
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<!DOCTYPE concept |
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PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
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<concept id="GUID-6067DF61-D32F-4029-ADCD-9E69CA564212" xml:lang="en"><title>Key |
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presses</title><prolog><metadata><keywords/></metadata></prolog><conbody> |
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<p>A key press is a press and release of a key (down and up).</p> |
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<p>Typically, the primary action of the key is performed when the key is pressed |
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down, already before the key is released (there may be exceptions to this |
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rule; see <xref href="GUID-26435FE1-D912-4AA2-96EE-82B35DA231E6.dita">Typical functions |
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of the standard keys</xref> for an example).</p> |
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<p>Some functions depend on the length of the key press:</p> |
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<ul> |
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<li><p>In a short press, the key is held down for less than 0.6 seconds (please |
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note that this time-out value may depend on the product implementation). If |
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the key is held down longer, the result is a long key press.</p></li> |
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<li><p>If the pressed key (in the given context) has functions for both a |
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short and long press, the short key press action is performed first at the |
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moment when the key is pressed down. If the key press is long, then the long |
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key press action is performed. In the case of the Home / Menu key and the |
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Edit key, the interaction is different, causing the action on the key release |
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event. </p></li> |
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<li><p>Certain keys, possibly in certain contexts only, may perform key repeat. |
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Key repeat starts after the long key press time-out when the key is continuously |
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being held down, and the associated function is performed according to the |
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key repeat frequency. For example, in scrolling within lists and text editors, |
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these frequencies are by default 6 times/second for vertical and 10 times/second |
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for horizontal scrolling (the repeat frequency may be product or application |
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specific). </p></li> |
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<li><p>Long key press actions and key repeat actions are not defined at the |
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same time; only one can occur in the given context. </p></li> |
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<li><p>The primary key press action should not be conflicting with the long |
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key press action or key repeat action.</p></li> |
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</ul> |
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<note> With certain input hardware (for example, Roller), long |
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key presses and key repeat may not be possible. The long key press actions |
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and key repeat actions should be designed so that this does not cause harm: |
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the long key press must never be the only way to perform a function</note> |
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</conbody></concept> |