Chart DSL

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Introduction

Vaadin

Vaadin is a web application framework for Java. In contrast to Javascript libraries and browser-plugin based solutions, Vaadin features a complete stack that includes a robust server-side programming model as well as client-side development tools based on GWT and HTML5.

More information: https://vaadin.com/home

jqPlot

jqPlot (http://www.jqplot.com) is a plotting and charting plugin for the jQuery Javascript framework and is dual licensed under the MIT and GPL version 2 licenses. jqPlot produces line, bar and pie charts with many features.

dCharts

dCharts is Vaadin add-on for creating charts and is a wrapper for jqPlot library.
For now dCharts support:

	Bar Charts	Block Charts	Bubble Charts	Donut Charts	Line Charts
Charts
	Meter Gauge Charts	OHLC, HLC and Candlestick Charts	Pie Charts	Pyramid Charts	Waterfall Charts
Events	mouse enter	mouse leave	click	right click

To enable it in OSBP it was neccessary to add OSGi capabilities to the addon.

Chart DSL

Chart DSL generates the vaddin dCharts ui.

The main semantic elements of the ChartDSL are:

• package - the root element that contains all the other elements. A model can contain multiple packages.
• import declarations - used to import external models or even Java classes.
• chart - define the chart configurations, e.g. chart type, polling time, datamart details, etc.
• as bar/line/pie/donut/bubble/gauge/tree - define the type for this chart .
• using datamart - define the data source details for this chart , e.g. row/column configurations, legend details and tooltips configurations.

Syntax

Package

► Syntax:

package <package name>  {
    import <import models/class name>
     ...

    chart... [using datamart <datamart name>
    {
         ...
    }]
...
}

Chart

► Syntax:

chart <char name> [described by <discription>] as 
    <chart type>
    [polling <polling time number>]
    [using datamart <datamart name> {
           ...
    }]

Generate a <chartame>+Chart.java file, in which a java class named <chartname>+Chart extended from java class AbstractHybridVaaclipseView is defined. In this class, chart and chart configurations are defined.

For the tree chart, generate explicit a <chartname>+<treetype>+JsChart.java file, a <chartname>+<treetype>+JsState.java file and a Treemap+<chartname>+<treetype>.js file.

The methods collapse(), expand(), change(), update(), click() or posistion() are defined for CollapseTree or TreeMap.

polling time sets chartRefresher.setRefreshInterval as polling time number * 1000 ms in createView(). It is only for bpm.

chart type

Define how the chart will be displayed, chart type is including

• bar,
• line,
• pie,
• donut,
• bubble,
• gauge and
• tree

► Syntax:

bar [shaded] [animated] [swapped] [stacked]
| line [animated] [showMarker] [trendline] [cursor [zoom] [tooltip]] [fillZero] [filled]
| pie [empty] 
| donut
| bubble [multiplier <value number>] [gradient | transparent]
| gauge [label <label value>] [hasTicks minimum <minValue number> maximum <maxValue number>][ intervals { up to <signed interval value> segmentcolor <rgb string>}]
| tree map|collapsible

Bar

Bar charts illustrate values as vertical or horizontal bars, respectively. Multiple data series, that is, two-dimensional data, are shown with thinner bars or columns grouped by their category.

► Syntax:

bar [shaded] [animated] [swapped] [stacked]

Barchart Sample

Notes:

• Inner axis is category axis and the outer axis is data axis.
• shaded will be set with seriesDefaults.setShadow(true).setShadowAlpha(0.05f); in createChart().
• animated will be set with options.setAnimate(true); in createChart().
• swapped will be axisSwith which means YX instead of XY as axisPrefix..
• stacked will be set with options.setStackSeries(true); in createChart().

►Example:

chart SalesPerRegion described by "Sales per state/province" as bar shaded stacked swapped using datamart SalesByDistrict {
    axis rows renders category
    axis columns renders linear tickangle 25 
    legend inside toggle replot slow
    tooltip east always inside
}

Line

Line charts connect the series of data points with lines. In the basic line charts the lines are straight.

► Syntax:

line [animated] [showMarker] [trendline] [cursor [zoom] [tooltip]] [fillZero] [filled]

Line chart sample

Notes:

• inner axis is category axis and the outer axis is data axis.
• animated will be set with options.setAnimate(true); in createChart().
• showMarker will be set with columnsSeries.addSeries(new XYseries(Yaxes.Y<scaleOrdinal>).setLabel(columnsTitlesArray.get(<measure counter>)).setShowMarker(<true if showMarker is selected>));<(code> in <code>createChart() if multiple axes are defined in datamart, or columnsSeries.addSeries(new XYseries().setLabel(<columnsTitlesArray string>).setShowMarker(<true if showMarker is selected>)); in createChart() if no multiple axes is defined in datamart.
• trendline will be set with seriesDefaults.setTrendline(new Trendline().setShow( true).setLineWidth(1)); in createChart().
• cursor will be set with Cursor cursor = new Cursor().setShow(true).setZoom(<true if zoom is selected>).setShowTooltip(<true if tooltip is selected>);options.setCursor(cursor); in createChart().
• fillZero and filled will be set with seriesDefaults.setFillToZero(<true if fillZero is selected>).setFill(<true if filled is selected>); in createChart().

►Example:

chart SalesByState described by "Sales by state and time" as line cursor zoom trendLine using datamart SalesByState {
    axis columns renders linear
    axis rows renders category tickangle 20
    legend inside toggle replot normal
    tooltip north-east always inside
}