Cewolf Tag Library (0.9.3)

This tag library is designed to describe charts of all kinds.

<plot>

The plot tag is nested inside a complex chart to define a nested or layerd plot instance. data

Attributes
type
The type of the plot. One of xyarea, xyline, xyshapesandlines , scatter, xyverticalbar, step, candlestick, highlow, signal, verticlebar, area, line, shapesandlines
required=true
rtexprvalue=true
xaxislabel
Title of the plot's x-axis. This attributes is only used for horizontally combined charts.
required=false
rtexprvalue=true
yaxislabel
Title of the plot's y-axis. This attributes is only used for vertically combined charts.
required=false
rtexprvalue=true

<img>

optional childs: <map>
 This tag is a specialized HTML img tag. It renders the chart which has been specified by a <chart> tag in the same page. map

Attributes
renderer
Path to rendering servlet. Any path that starts with a '/' is assumed to refer to a resource relative to web application root. Otherwise, the path is assumed to refer to resource relative to the current page directory.
required=true
rtexprvalue=true
chartid
The id of the chart to render.
required=true
rtexprvalue=true
width
Width of the rendered chart image in pixel.
required=true
rtexprvalue=true
height
Height of the rendered chart image in pixel.
required=true
rtexprvalue=true
mime
The MIME type of the image. Currently image/png (default) and image/svg are supported. image/png
default=image/png
required=false
rtexprvalue=true
alt
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
hspace
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
vspace
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
align
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
border
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
ismap
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
longdesc
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
usemap
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
class
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
dir
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
lang
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onclick
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
ondbclick
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onkeydown
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onkeypress
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onkeyup
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmousedown
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmousemove
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmouseout
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmouseover
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmouseup
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
style
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
htmltitle
Corresponds to appropriate HMTL <img> title attribute.
required=false
rtexprvalue=true

<imgurl>

This tag can be used as the src attribute of a HTML img tag. E.g.: <img src='<imgurl chartid="foobar" renderer="cewolf" width="100" height="100"/>'> If the var attribute is used the URL is exposed as a page attribute of type String. img

Attributes
var
Name of the page scope attribute to hold the URL. If not specified the URL is printed to the page outstream.
required=false
rtexprvalue=true
renderer
Path to rendering servlet. Any path that starts with a '/' is assumed to refer to a resource relative to web application root. Otherwise, the path is assumed to refer to resource relative to the current page directory.
required=true
rtexprvalue=true
chartid
The id of the chart to render.
required=true
rtexprvalue=true
width
Width of the rendered chart image in pixel.
required=true
rtexprvalue=true
height
Height of the rendered chart image in pixel.
required=true
rtexprvalue=true
mime
The MIME type of the image. Currently image/png (default) and image/svg are supported. image/png
default=image/png
required=false
rtexprvalue=true

<chart>

optional childs: <chartpostprocessor>
 Root tag of a chart description. data chartpostprocessor

Attributes
id
ID under which the chart description bean will be stored in the page to be found by the img tag. Beware of using an ID which is not yet used for other beans in the page to avoid compile errors.
required=true
rtexprvalue=true
type
Type of the chart. One of area, areaxy, horizontalbar, horizontalbar3d, line, pie, scatter, stackedhorizontalbar, stackedverticalbar, stackedverticalbar3d, timeseries, verticalbar, verticalbar3d, xy, candlestick, highlow, gantt, wind, signal, verticalxybar, pie3d
required=true
rtexprvalue=true
title
Title of the chart which is displayed on the chart panel above the plot pane.
required=false
rtexprvalue=true
xaxislabel
Title of the chart's x-axis. This attributes is ignored if the type attribute of the parent chart tag is one of pie3d or pie.
required=false
rtexprvalue=true
yaxislabel
Title of the chart's y-axis. This attributes is ignored if the type attribute of the parent chart tag is one of pie3d or pie.
required=false
rtexprvalue=true
background
Background image of the chart panel. The value of this attribute is the filename of a graphics file relative to the web application's root directory (e.g. /WEB-INF/img/bg.jpg). The image must be loadable by the default java.awt.Toolkit of the servlet container's JVM.
required=false
rtexprvalue=true
backgroundimagealpha
Chart's backgound alpha blending value as a float. Value ranges from 0.0 to 1.0. 0.0 /chart[backgroundimagealpha]
type=java.lang.Float
default=0.0
required=false
rtexprvalue=true
antialias
Antialiased rendering of the chart. true /chart[backgroundimagealpha]
default=true
required=false
rtexprvalue=true
showlegend
Boolean value to switch on or off the legend display inside of this panel. true
default=true
required=false
rtexprvalue=true
legendanchor
Sets the anchor of the legend inside of the panel. Possible values are 'north', 'south', 'west', 'east'. Ignored if showlegned is 'false'. 'south'
default='south'
required=false
rtexprvalue=true

<overlaidchart>

optional childs: <chartpostprocessor>
 Root tag of a overlaid-chart description. data chartpostprocessor

Attributes
id
ID under which the chart description bean will be stored in the page to be found by the img tag. Beware of using an ID which is not yet used for other beans in the page to avoid compile errors.
required=true
rtexprvalue=true
type
Type of the chart. In this version only overlaidxy is supported.
required=true
rtexprvalue=true
title
Title of the chart which is displayed on the chart panel above the plot pane.
required=false
rtexprvalue=true
xaxistype
Type of the domain axis. Possible values: date, number
required=true
rtexprvalue=true
xaxislabel
Title of the chart's x-axis. This attributes is ignored if the type attribute of the parent chart tag is one of pie3d or pie.
required=false
rtexprvalue=true
yaxistype
Type of the range axis. Possible values: date, number
required=false
rtexprvalue=true
yaxislabel
Title of the chart's y-axis. This attributes is ignored if the type attribute of the parent chart tag is one of pie3d or pie.
required=false
rtexprvalue=true
background
Background image of the chart panel. The value of this attribute is the filename of a graphics file relative to the web application's root directory (e.g. /WEB-INF/img/bg.jpg). The image must be loadable by the default java.awt.Toolkit of the servlet container's JVM.
required=false
rtexprvalue=true
backgroundimagealpha
Chart's backgound alpha blending value as a float. Value ranges from 0.0 to 1.0. 0.0 /chart[backgroundimagealpha]
type=java.lang.Float
default=0.0
required=false
rtexprvalue=true
antialias
Antialiased rendering of the chart. true /chart[backgroundimagealpha]
default=true
required=false
rtexprvalue=true
showlegend
Boolean value to switch on or off the legend display inside of this panel. true
default=true
required=false
rtexprvalue=true
legendanchor
Sets the anchor of the legend inside of the panel. Possible values are 'north', 'south', 'west', 'east'. Ignored if showlegned is 'false'. 'south'
default='south'
required=false
rtexprvalue=true

<combinedchart>

optional childs: <chartpostprocessor>
 Root tag of a combined-chart description. plot chartpostprocessor

Attributes
id
ID under which the chart description bean will be stored in the page to be found by the img tag. Beware of using an ID which is not yet used for other beans in the page to avoid compile errors.
required=true
rtexprvalue=true
type
Type of the chart. One of combinedxy
required=true
rtexprvalue=true
layout
Layout of the chart. Either vertical or horizontal
required=true
rtexprvalue=true
title
Title of the chart which is displayed on the chart panel above the plot pane.
required=false
rtexprvalue=true
xaxislabel
Title of the chart's x-axis. This attributes is ignored if the type attribute of the parent chart tag is one of pie3d or pie.
required=false
rtexprvalue=true
yaxislabel
Title of the chart's y-axis. This attributes is ignored if the type attribute of the parent chart tag is one of pie3d or pie.
required=false
rtexprvalue=true
background
Background image of the chart panel. The value of this attribute is the filename of a graphics file relative to the web application's root directory (e.g. /WEB-INF/img/bg.jpg). The image must be loadable by the default java.awt.Toolkit of the servlet container's JVM.
required=false
rtexprvalue=true
backgroundimagealpha
Chart's backgound alpha blending value as a float. Value ranges from 0.0 to 1.0. 0.0 /chart[backgroundimagealpha]
type=java.lang.Float
default=0.0
required=false
rtexprvalue=true
antialias
Antialiased rendering of the chart. true /chart[backgroundimagealpha]
default=true
required=false
rtexprvalue=true
showlegend
Boolean value to switch on or off the legend display inside of this panel. true
default=true
required=false
rtexprvalue=true
legendanchor
Sets the anchor of the legend inside of the panel. Possible values are 'north', 'south', 'west', 'east'. Ignored if showlegned is 'false'. 'south'
default='south'
required=false
rtexprvalue=true

<legend>

This tag is used to render the legend of a chart in a separate image. It assumes that somewhere else in the JSP a chart tag defines a chart with the same ID as this legend tag.

Attributes
renderer
Path to rendering servlet relative to web apps root URL (e.g. servlet/cewolf).
required=true
rtexprvalue=true
id
ID under which the chart description bean will be stored in the session to be found by the rendering servlet. Beware of using an ID which is not yet used for other beans in the session to avoid overriding.
required=true
rtexprvalue=true
width
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
height
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
mime
The MIME type of the image. Currently image/png (default) and image/svg are supported. image/png
default=image/png
required=false
rtexprvalue=true
alt
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
hspace
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
vspace
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
align
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
border
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
ismap
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
longdesc
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
usemap
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
class
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
dir
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
lang
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onclick
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
ondbclick
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onkeydown
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onkeypress
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onkeyup
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmousedown
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmousemove
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmouseout
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmouseover
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
onmouseup
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
style
Corresponds to appropriate HMTL <img> attribute.
required=false
rtexprvalue=true
htmltitle
Corresponds to appropriate HMTL <img> title attribute.
required=false
rtexprvalue=true

<data>

optional childs: <producer>
 A data tag provides all information needed to retrieve the data which are needed by the chart. Current version only supports data provided by a DatasetProducer. In future versions there will be tags to provide data from a datasource (e.g. via SQL). producer

Attributes

<producer>

optional childs: <param>
 A data tag provides all information needed to retrieve the data which are needed by the chart. Current version only supports data provided by a DatasetProducer. In future versions there will be tags to provide data from a datasource (e.g. via SQL). param

Attributes
id
ID under which an object of type DatasetProducer can be found in pageContext. This object is used to retrieve the dataset of the chart.
required=true
rtexprvalue=true
usecache
Determines if formally produced data should be reused if possible. true
default=true
required=false
rtexprvalue=true

<chartpostprocessor>

optional childs: <param>
 A chart postprocessor tag references an object of type ChartProstProcessor which must be defined in pageContext under the provided ID. This object is called back after chart generation to post process the chart in any manner. param

Attributes
id
ID under which an object of type ChartPostProcessor can be found in pageContext. This object is used to postprocess the rendered chart.
required=true
rtexprvalue=true

<param>

Name/value-pair to paramterize a surrounding tag whose handler must implement the Parameterized interface.

Attributes
name
Name of the param
required=true
rtexprvalue=true
value
Value of the param. Must be serializable.
type=java.io.Serializable
required=true
rtexprvalue=true

<gradientpaint>

The gradientpaint tag provides a way to fill a shape with a linear color gradient pattern. If Point P1 with Color C1 and Point P2 with Color C2 are specified in user space, the Color on the P1, P2 connecting line is proportionally changed from C1 to C2. Any point P not on the extended P1, P2 connecting line has the color of the point P' that is the perpendicular projection of P on the extended P1, P2 connecting line. Points on the extended line outside of the P1, P2 segment can be colored in one of two ways. <ul> <li>If the gradient is cyclic then the points on the extended P1, P2 connecting line cycle back and forth between the colors C1 and C2. <li>If the gradient is acyclic then points on the P1 side of the segment have the constant Color C1 while points on the P2 side have the constant Color C2. The two colors are defined in a nested point tag of this tag. point

Attributes
cyclic
Does the gradient cycle repeatedly between the two colors C1 and C2. false
default=false
required=false
rtexprvalue=true

<point>

Defines a point with x and y coordinates and a color. colorpaint

Attributes
x
The x coordinate of the point.
required=true
rtexprvalue=true
y
The y coordinate of the point.
required=true
rtexprvalue=true
color

required=false
rtexprvalue=true

<colorpaint>

Fills the area defined by the parent tag with a color.

Attributes
color
The color to be used to fill the parent tag's area. The color definition is compatible with the HTML one. E.g. black is '#000000' and red is '#FF0000'. However it is possible to append two hex numbers for the alpha channel. Thus '#FF000080' is red with alpha blending of 50%.
required=true
rtexprvalue=true

<texturepaint>

The texturepaint tag provides a way to fill the area of the parent tag with a texture that is specified as an image. The texture is anchored to the upper left corner of the parent tags area.

Attributes
image
Image fo the texture. The value of this attribute is the filename of a graphics file relative to the web application's root directory (e.g. /WEB-INF/img/bg.jpg). The image must be loadable by the default java.awt.Toolkit of the servlet container's JVM.
required=true
rtexprvalue=true
width
The width of the texture.
required=true
rtexprvalue=true
height
The height of the texture.
required=true
rtexprvalue=true

<map>

This tag defines an image and tooltip map for the parent img tag. img

Attributes
linkgeneratorid
The ID of the class which implements the appropriate de.laures.cewolf.LinkGenerator.
required=false
rtexprvalue=true
tooltipgeneratorid
The ID of the class which implements the appropriate com.jrefinery.chart.tooltips.ToolTipGenerator.
required=false
rtexprvalue=true

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