×
Namespaces

Variants
Actions
(Difference between revisions)

Mobile Design Pattern: Slider Control

From Nokia Developer Wiki
Jump to: navigation, search
marcelobarrosalmeida (Talk | contribs)
m (Marcelobarrosalmeida - FIxing broken link to embedded widgets)
hamishwillee (Talk | contribs)
m (Hamishwillee - Bot update - Fix ArticleMetaData and RevieweApproval)
Line 1: Line 1:
{{ReviewerApproved}}
+
{{ArticleMetaData <!-- v1.1 -->
 +
|sourcecode= <!-- Link to example source code e.g. [[Media:The Code Example ZIP.zip]] -->
 +
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
 +
|devices= <!-- Devices tested against - e.g. ''devices=Nokia 6131 NFC, Nokia C7-00'') -->
 +
|sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Qt SDK 1.1.4]) -->
 +
|platform= <!-- Compatible platforms - e.g. Symbian^1 and later, Qt 4.6 and later -->
 +
|devicecompatability= <!-- Compatible devices e.g.: All* (must have internal GPS) -->
 +
|dependencies= <!-- Any other/external dependencies e.g.: Google Maps Api v1.0 -->
 +
|signing= <!-- Signing requirements - empty or one of: Self-Signed, DevCert, Manufacturer -->
 +
|capabilities= <!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. -->
 +
|keywords= <!-- APIs, classes and methods (e.g. QSystemScreenSaver, QList, CBase -->
 +
|id= <!-- Article Id (Knowledge base articles only) -->
 +
|language= <!-- Language category code for non-English topics - e.g. Lang-Chinese -->
 +
|translated-by= <!-- [[User:XXXX]] -->
 +
|translated-from-title= <!-- Title only -->
 +
|translated-from-id= <!-- Id of translated revision -->
 +
|review-by= <!-- After re-review: [[User:username]] -->
 +
|review-timestamp= <!-- After re-review: YYYYMMDD -->
 +
|update-by= <!-- After significant update: [[User:username]]-->
 +
|update-timestamp= <!-- After significant update: YYYYMMDD -->
 +
|creationdate= 20090506
 +
|author= [[User:Yiibu]]
 +
}}
 +
 
  
  
Line 52: Line 75:
 
[[Image:27-QT-slider.jpg]]  
 
[[Image:27-QT-slider.jpg]]  
  
'''Figure:''' Examples of [http://qt.nokia.com/qt-in-use/developer/embedded-widget-demos Qt embedded widget sliders] for touch devices.[[Category:Mobile_Design]][[Category:Mobile_Design_Patterns]]
+
'''Figure:''' Examples of [http://qt.nokia.com/qt-in-use/developer/embedded-widget-demos Qt embedded widget sliders] for touch devices.[[Category:Mobile Design]][[Category:Mobile Design Patterns]]

Revision as of 03:10, 10 February 2012

Article Metadata
Article
Created: User:Yiibu (06 May 2009)
Last edited: hamishwillee (10 Feb 2012)




This design pattern is part of the Mobile Design Patterns series.

Contents

Description

A control which enables the user to choose one distinct value within a finite range by dragging (or simulating the dragging) of) one or more sliders along a single axis.


Advantages

  • Highly visual and intuitive — especially when representing a familiar scale of values.

Disadvantages

  • Only suitable when the list of values is short and there is enough context to make an informed decision regarding the likely impact of the chosen increment.


Use when

  • The user’s mental model of a series of values is closely tied to an increasing or decreasing scale and limited amount of discrete values. Ex. Controls to increase/decrease brightness, contrast, intensity or volume.


Use how

Direct manipulation

  • The slider works in a similar manner to a real-world physical control. The user presses on the slider handle (to simulate grasping) then (while continuing to press), drags the handle to the desired incremental stop position.
  • A two-handle control can also be used (on touch devices only) to set a range of values. In this case, one slider provides the minimum value and the other the maximum value—thereby creating a range.


Indirect manipulation

  • The slider handle is either provided with immediate focus or the user can focus the control then manipulate it. (see example below)
  • The slider handle is mapped to the Left/Right keys (for a horizontal control) or Up/Down keys (for a vertical control).
  • Each click of the keys moves the slider handle by one pre-set increment.
  • Holding 'Down' may automatically repeat the adjustment until the key is released.


25-equalizer.jpg

Figure: The S60 Equalizers must each be focused before they can be manipulated.


Design Tips

  • Adding tick marks (or other visual way points) enables users to more accurately gauge the incremental change in values.
  • Pairing the slider with a visual representation of the change in value can also be useful. Ex. A Real-time RGB colour picker updates the colour values in real time as you manipulate each slider.


26-various-sliders.jpg

Figure: Various sliders in use within S60; each providing varying degrees of feedback. The ‘Ringing Volume’ control functions in a in a similar manner but does not provide an actual slider—only the accompanying ‘increasing scale’ visualization.


27-QT-slider.jpg

Figure: Examples of Qt embedded widget sliders for touch devices.

66 page views in the last 30 days.
×