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Summary

Tag Name: <tr:chart>
Java Class: org.apache.myfaces.trinidad.component.core.data.CoreChart
Component Type: org.apache.myfaces.trinidad.CoreChart

The Trinidad Chart is used to display data as a chart.

Code Example(s)

<tr:chart id="chart" verticalMajorSections="8" value="#{chartBean.value}"
          inlineStyle="width:680px; height:400px;"/>

Events

Type Phases Description
org.apache.myfaces.trinidad.event.AttributeChangeEvent Invoke Application,
Apply Request Values		 Event delivered to describe an attribute change. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change event might include the width of a column that supported client-side resizing.

Attributes

Name Type Supports EL? Description
XMajorGridLineCount int Yes Default Value: -1

This attribute controls the number of vertical major grid lines displayed in the chart. The default value is -1, which implies that the vertical major grid lines are controlled by the groupLabels in the chart model. This parameter along with the groupLabels provide flexibility in labeling the groups. For e.g. one can display a vertical bar chart with 2 years data. Only quarters may be labeled and XMajorGridLineCount can be 1 for splitting the data into two sections.
YMajorGridLineCount int Yes Default Value: 3

This attribute controls the number of horizontal major grid lines displayed in the chart. For horizontal charts(horizontalBar, stackedHorizontalBar) this attribute controls the horizontal major grid lines. The default is 3.
YMinorGridLineCount int Yes Default Value: -1

This attribute controls the number of minor grid lines displayed within a major grid section. The default value is -1, which means it varies per chart type. Currently it is used only for gauge charts with a default of 3.
animationDuration int Yes Default Value: 1000

The duration of the animation for the chart components in milliseconds. Animation can be turned off if the animationDuration is set to 0. The default value is 1000ms.
attributeChangeListener javax.el.MethodExpression Only EL a method reference to an attribute change listener. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change events might include the width of a column that supported client-side resizing.
binding org.apache.myfaces.trinidad.component.core.data.CoreChart Only EL an EL reference that will store the component instance on a bean. This can be used to give programmatic access to a component from a backing bean, or to move creation of the component to a backing bean.
chartDrillDownListener javax.el.MethodExpression Only EL a method reference to a drill down listener that will be called when the user drills down into the chart data.The method must take a parameter of type org.apache.myfaces.trinidad.event.ChartDrillDownEvent.
gradientsUsed boolean Yes Default Value: true

Specifies if gradients are used to display chart elements. By default the chart elements use gradients.
id String No the identifier for the component. Every component may be named by a component identifier that must conform to the following rules:
  • They must start with a letter (as defined by the Character.isLetter() method) or underscore ( _ ).
  • Subsequent characters must be letters (as defined by the Character.isLetter() method), digits as defined by the Character.isDigit() method, dashes ( - ), or underscores ( _ ). To minimize the size of responses generated by JavaServer Faces, it is recommended that component identifiers be as short as possible. If a component has been given an identifier, it must be unique in the namespace of the closest ancestor to that component that is a NamingContainer (if any).
inlineStyle String Yes the CSS styles to use for this component.
legendPosition String Yes Valid Values: none, bottom, end, top, start
Default Value: bottom

Specified the location of the legend. The legend can be turned off by setting this attribute to none. Otherwise it can be drawn at top, start, end or bottom.
maxPrecision int Yes Default Value: 0

The maximum precision of the numbers displayed on the yAxis(xAxis for horizontal charts). The default is 0.
partialTriggers String[] Yes the IDs of the components that should trigger a partial update.

This component will listen on the trigger components. If one of the trigger components receives an event that will cause it to update in some way, this component will request to be updated too.

Separate multiple triggers with a space. e.g., partialTriggers="cmp1 cmp2"

Identifiers must account for NamingContainers. You can use a single colon to start the search from the root, or use multiple colons to move up through the NamingContainer. For example, "::" will pop out of this component's naming container (it pops out of itself if it is a naming container), ":::" will pop out of two naming containers, etc. The search for the partialTrigger begins from there. e.g., partialTriggers=":::commandButton1" the search begins for the component with id = commandButton1 after popping out of two naming containers relative to this component. To go into naming containers, you separate the naming containers with ':', e.g.,partialTriggers= "nc1:nc2:nc3:componentId".
perspective boolean Yes Default Value: true

Specifies if the chart is drawn with a perspective (2.5D). By default the chart is draw with a perspective.
rendered boolean Yes Default Value: true

whether the component is rendered. When set to false, no output will be delivered for this component (the component will not in any way be rendered, and cannot be made visible on the client). If you want to change a component's rendered attribute from false to true using PPR, set the partialTrigger attribute of its parent component so the parent refreshes and in turn will render this component.
shortDesc String Yes The short description of the component. This text is commonly used by user agents to display tooltip help text.
styleClass String Yes a CSS style class to use for this component.
templateSource String Yes Specifies URI for the template document from which the chart elements are cloned. If this attribute is null, the chart component uses a default template. The default template is chosen based on whether the useGradient attribute is true or false. The template document is useful for changing the Look and Feel of the chart. Some examples include:1)A developer may want to skin the chart to match its corporate Look and Feel. 2)A developer may want to put water marks/background images inside the chart. 3)A developer may want to change the template for the gauges used in the gauge charts. 4)A developer may want to turn off gradients and instead use filters to set some interesting effects on the chart elements.
tooltipsVisible boolean Yes Default Value: true

Specifies if tooltips are displayed or not.
type String Yes Valid Values: verticalBar, horizontalBar, stackedVerticalBar, stackedHorizontalBar, pie, area, stackedArea, line, barLine, XYLine, scatterPlot, radar, radarArea, funnel, circularGauge, semiCircularGauge
Default Value: verticalBar

The type of chart. Possible Values are: verticalBar horizontalBar stackedVerticalBar stackedHorizontalBar pie area stackedArea line barLine XYLine scatterPlot radar radarArea funnel circularGauge semiCircularGauge.
value Object Yes the data model being used by this component.The specific model class must be derived from org.apache.myfaces.trinidad.model.ChartModel. The derived class must override the abstract methods to provide the required values for chart display.