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using charts makes complex data easier to comprehend. unfortunately the decision to add charts to a web site or an application doesnt necessarily make life easier for the designers and programmers responsible for displaying them. depending on the complexity of the data, developers may encounter a seemingly endless series of questions. what type of chart is needed? should the data be displayed horizontally or vertically? 2d or 3d? what increments should be used along the axis lines? what happens if the data changes?
espresschart from quadbase systems, inc., is a set of tools to help developers design and implement a variety of chart types. the primary tools that make up espresschart include chart server, chart designer, chart viewer, and chart api.
chart server provides user authentication as well as local and remote file access. although chart server generally runs on a web server, its possible to run it on a stand-alone machine.
chart designer is a 100% pure java, interactive, front-end
application that guides developers through the process of creating
charts. designers choose from a list of common chart types, then add
customization - including rotating the chart to view it from
different angles. once a chart has been created, it can be exported
in a variety of formats. in addition to common formats, such as .gif
and .bmp, two formats specific to espresschart are available. charts
exported as .cht (chart designer format) files are acc... 下一页