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

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

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

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

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

     6 <!-- Initial Contributors:

     7 	Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->  <!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"><concept id="GUID-E7EFAD50-3323-49A6-A5D9-95B95F0FBF0E" xml:lang="en"><title>Preview

    10 pop-up</title><prolog><metadata><keywords></keywords></metadata></prolog><conbody>

    11 <p>Preview pop-up is a floating component used for displaying more detailed

    12 data about an item that has focus in the main pane.</p>

    13 <fig id="GUID-443FE00D-6678-4951-9038-07C82D10B69E">

    14 <title>Floating preview</title>

    15 <image href="GUID-F07B3B53-0C4D-4472-8E00-34A4C8501C5E_d0e60397_href.png" scale="40" placement="inline"></image>

    16 </fig>

    17 <p>The preview is displayed with a 0.6 second delay after the focus is moved

    18 (for example, scrolling down a list with the Arrow keys) to avoid too rapid

    19 and continuous flicker. The default timeout for closing the preview pop-up

    20 is the same as for the Information pop-up, but it is possible to adjust it

    21 if necessary.</p>

    22 <p>Preview pop-up contents cannot be scrolled and the component must not contain

    23 any buttons or other elements that make it appear interactive: the component

    24 is the same in both standard and touch-enabled devices and should the component

    25 be used in a standard non-touch device, its elements should not look touch-enabled.

    26 There can be a maximum of five text rows in a preview pop-up, and it is possible

    27 to place a small icon in the start of the rows. It is even possible to have

    28 more than one icon on a row instead of text, if necessary. The number of images

    29 in a single preview pop-up is limited to one, and it can be accompanied by

    30 up to two rows of text.</p>

    31 <p>Preview pop-up shows always duplicate data in a given application to ensure

    32 that the user will not miss any content or functionality even if a given product

    33 does not utilize preview pop-up (that is, it has been switched off). Owing

    34 to the special nature of preview pop-up, it is important to thoroughly consider

    35 its genuine usefulness in various applications. Furthermore, the component

    36 should not be confused with the Information pop-up note even though the data

    37 displayed in these two components can at times be identical.</p>

    38 <section><title>Preview pop-up in a touch interface</title><p>Preview pop-up

    39 is a floating component used for displaying more detailed data about an item

    40 that has the focus in the main pane. It is not a touch-only component, and

    41 its basic functionality is described above. Although it is not recommended

    42 to place buttons or other items that appear touch-enabled into the preview

    43 pop-up, it is still possible to give some items touch-only functions. It is

    44 up to each application to decide whether to make use of this support in some

    45 sensible way. For example, a tap on a www hyperlink displayed in the preview

    46 pop-up would open Browser and open the Web site in question. However, it should

    47 be noted that using touch-enabled items in the preview pop-up is an advanced,

    48 heavy-user feature.</p><p>A tap on an item in the preview pop-up can also

    49 open the stylus pop-up menu, when there is no obvious direct function for

    50 that item. For more information, see <xref href="GUID-C4E728B4-3E84-49A4-83CB-DF146420D78A.dita">Stylus

    51 pop-up menu</xref>.</p></section>

    52 <section><title>Preview pop-up for touch only</title><p>The above section

    53 describes the general case for touch and the preview pop-up. There is, however,

    54 a variance possibility for the preview pop-up, which is to limit it strictly

    55 for touch. In this case, the guideline for having no buttons or other obvious

    56 touch items in the preview pop-up can be ignored for the most part: if the

    57 preview pop-up can only be opened with a stylus, it is perfectly acceptable

    58 to make touch functions plainly touch-enabled.</p></section>

    59 <section><title>Using preview pop-ups

    60 in C++ applications</title><p>The API to use for creating the preview pop-up

    61 component is the Information

    62 preview popup API.</p><p>Preview popups can be used in two modes: in

    63 the default mode where the popup is hidden automatically as a result of timeout

    64 or input event (either a key press or a pointer event), or in permanent mode

    65 where the popup stays visible until it is dismissed by the application code. </p><p>For

    66 implementation information, see Using

    67 the Information Preview Popup API. </p></section>

    68 </conbody></concept>