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Andreas Österreicher
76 lines
2.3 KiB
Plaintext
76 lines
2.3 KiB
Plaintext
eZ component: Graph, Requirements
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:Author: Derick Rethans
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:Revision: $Revision: 2547 $
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:Date: $Date: 2006-04-12 11:53:25 +0200 (Wed, 12 Apr 2006) $
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Introduction
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============
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Description
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-----------
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The purpose of this component is to generate different kinds of diagrams from
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different kinds of data. The diagrams' appearance needs to be slick and
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customizable.
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Requirements
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============
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The first version of the component should cover the following types of
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charts:
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Piechart
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--------
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A diagram showing values as elements of a piechart. It should support:
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- highlighted parts (shown as a little bit outwards of the pie)
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- setting a tresh hold under which values are combined together in an "others"
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part
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- automatic colours, but they should be able to set manually too
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- automatic legenda generation and label placement
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- 2D view, like:
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http://www.eia.doe.gov/neic/brochure/gas04/images/pie%20chart.gif
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- 3D view, like: http://www.chambersfund.org/images/piechart.jpg
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- background image and/or colours
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Linechart
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---------
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A diagram with a variable y-axis showing values for a finite set of data
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points. The chart should be able to show different data sets, but all measured
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only in the same unit.
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Line charts should support:
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- automatic colours and styles, but each dataset should be able to be styled
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manually
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- automatic scaling of the x and y-axis
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- automatic legenda generation
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- automatic label placement for both x and y-axis
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- options for setting when to draw vertical and horizontal lines, and in which
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style they should be drawn
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- 2D view, like: http://www.swiftchart.com/line_ex5.jpg
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- 3D view, like: http://www.jspwiki.org/attach/LineChart/Line+Chart+3D.png
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- background image and/or colours
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Special Considerations
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======================
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The component should be flexible enough to allow averaging and other analysis
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methods to work on datasets and add rendered data to the resulting graph. This
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can for example be trend analysis or mean average etc.
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Formats
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=======
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Graphs should be rendered as PNGs in the first version, but it should be
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possible to have different renders to render to f.e. SVG or flash in later
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versions of the component.
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..
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Local Variables:
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mode: rst
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fill-column: 79
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End:
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vim: et syn=rst tw=79
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