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