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== Summary ==<br />
<br />
<br />
== Category ==<br />
Interaction<br />
<br />
== Context ==<br />
Data items presented with detailed information hidden.<br />
<br />
== Problem ==<br />
How to show the user details about a specific item or items of interest.<br />
<br />
== Forces ==<br />
* Lack of screen space.<br />
* Need to see specific data attribute values, i.e. text labels.<br />
* Permanent display of details about items.<br />
<br />
== Solution ==<br />
'''Use a separate window to display item details.'''<br />
<br />
A visualisation should allow the user to view data item attribute<br />
values. [[Datatips]] can be used to show a temporary details on demand<br />
window. The advantages of the datatips technique are that no mouse<br />
clicks are required, just pointing, and since the window is temporary it<br />
only interferes with the display for a short time. Both Brath <ref>Brath, R. (1999) Effective Information Visualization : Guidelines and Metrics for 3D Interactive Representations of Business Data. Masters of Computer Science Thesis, Graduate Department of Computer Science, University of Toronto, Canada.</ref> and Eick <ref>Eick, S.G. (1995). Engineering Perceptually Effective Visualizations for Abstract Data. In: Nielson, G.M., Hagen, H., Muller, H. eds. Scientific Visualization Overviews, Methodologies and Techniques. USA: IEEE Computer Science Press. pp 191-210.</ref> recommend this approach.<br />
<br />
An alternative is to display the details in a completely separate window.<br />
This more permanent window is useful if the details need to be<br />
frequently referred to but at the cost of increasing screen clutter. So far,<br />
a mechanism for converting the popup window into a separate<br />
permanent window has not been described but this may be a useful<br />
feature.<br />
<br />
== Examples ==<br />
[[Image:Snap_together.png|150px|thumb|Snap Together Visualization]]<br />
[[Image:filmfinder.png|150px|thumb|Film Finder]]<br />
* Snap Together Visualisation <ref>North, C., Shneiderman, B. (1999a). Snap-Together Visualization: Coordinating Multiple Views to Explore Information. University of Maryland Computer Science Dept. Technical Report; #CS-TR-4020.</ref><ref>North, C., Shneiderman, B. (1999b). Snap-Together Visualization: Evaluating Coordination Usage and Construction. University of Maryland Computer Science Dept. Technical Report;#CS-TR-4075.</ref><ref>North, C., Shneiderman, B. (2000). Snap-Together Visualization: A User Interface for Coordinating Visualizations via Relational Schemata. In: Advanced Visual Interfaces ’00. Palermo, Italy, 23-26 May 2000. pp 128-135.</ref><br />
* Windows(TM) Explorer<br />
* FilmFinder <ref>Ahlberg, C., Shneiderman, B. (1994). Visual information seeking: tight coupling of dynamic query filters with starfield displays. In: Human Factors and Computing Systems. Boston, USA, 24-28 April 1994. pp 313-317.</ref><br />
<br />
== Related Patterns ==<br />
* [[Datatips]]<br />
<br />
== References ==<br />
<references/><br />
<br />
See also: Wilkins, B., (2003). “MELD: A Pattern Supported Methodology for Visualisation Design”, PhD Dissertation, University of Birmingham, UK.</div>Thatbrock