org.pentaho.platform.uifoundation.chart
Class DashboardWidgetComponent

java.lang.Object
  org.pentaho.platform.engine.core.system.PentahoBase
      org.pentaho.platform.engine.services.PentahoMessenger
          org.pentaho.platform.uifoundation.component.BaseUIComponent
              org.pentaho.platform.uifoundation.component.xml.XmlComponent
                  org.pentaho.platform.uifoundation.chart.DashboardWidgetComponent

All Implemented Interfaces:

Serializable, ILogger, IUIComponent, IXMLComponent

public class DashboardWidgetComponent
extends XmlComponent

This class is a Pentaho user interface component.

It generates dial images that can be embedded into JSPs, portals or other HTML supporting user interface.

1. The creating object sets the width, height, the type of the dial, and the name of the dial.xml file that contains the definition of the dial.
2. This class creates an instance of a DialWidgetDefinition using the specified XML definition file. The XML files are located in the solution folders and have .dial.xml extenstions. The dial XML files define the attributes that define how the dial looks.
3. It uses the JFreeChartEngine to create an image of the dial.
4. Once the image has been created this class creates an XML document describing the dial
5. It uses an XSL to tranforms the XML description into HTML.

This is an example image

See Also:

Serialized Form

Field Summary

static int	TYPE_DIAL
static int	TYPE_THERMOMETER

Fields inherited from class org.pentaho.platform.uifoundation.component.BaseUIComponent

debug

Fields inherited from class org.pentaho.platform.engine.core.system.PentahoBase

EMPTYLOGID, LOGID_MASK1, LOGID_MASK2, LOGID_SEPARATOR

Fields inherited from interface org.pentaho.platform.api.engine.ILogger

ACTIVITY_LOG, DEBUG, ERROR, FATAL, INFO, INSTANCE_LOG, SESSION_LOG, SOLUTION_LOG, TRACE, UNKNOWN, WARN

Constructor Summary

DashboardWidgetComponent(int type, String definitionPath, int width, int height, IPentahoUrlFactory urlFactory, List messages)
Creates a DashboardWidgetComponent.

Method Summary

void	dispose()
Log	getLogger() Gets the logger for his component.
Document	getXmlContent() Create a dial image.
void	setTitle(String title) Sets the title for the dial
void	setUnits(String units) Sets the unit for the dial value
void	setValue(double value) Sets the value to be displayed by the dial.
boolean	validate() Validate that this component can generate the requested dial

Methods inherited from class org.pentaho.platform.uifoundation.component.xml.XmlComponent

getContent

Methods inherited from class org.pentaho.platform.uifoundation.component.BaseUIComponent

done, getObjectParameter, getParameter, getParameterAsArray, getParameterProviders, getXsl, getXslProperties, handleRequest, setParameterProvider, setParameterProviders, setRequestHandler, setUrlFactory, setXsl, setXslProperty, validate

Methods inherited from class org.pentaho.platform.engine.services.PentahoMessenger

debug, debug, error, error, fatal, fatal, getMessages, getUserString, info, info, setMessages, trace, trace, warn, warn

Methods inherited from class org.pentaho.platform.engine.core.system.PentahoBase

genLogIdFromInfo, genLogIdFromInfo, genLogIdFromSession, getLoggingLevel, getLogId, getObjectName, setLoggingLevel, setLogId

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TYPE_DIAL

public static final int TYPE_DIAL

See Also:

Constant Field Values

TYPE_THERMOMETER

public static final int TYPE_THERMOMETER

See Also:

Constant Field Values

Constructor Detail

DashboardWidgetComponent

public DashboardWidgetComponent(int type,
                                String definitionPath,
                                int width,
                                int height,
                                IPentahoUrlFactory urlFactory,
                                List messages)

Creates a DashboardWidgetComponent.

After creating an instance of this class validate should be called.

Parameters:

type - The type of the widget, currently only TYPE_DIAL is supported

definitionPath - The path and name of the XML definition of the dial

width - The width of the image to be created

height - The height of the image to be created

urlFactory - The urlFactory for the content

messages - The messages list for any logger messages

Method Detail

setValue

public void setValue(double value)

Sets the value to be displayed by the dial.

Parameters:

value - The dial value

setTitle

public void setTitle(String title)

Sets the title for the dial

Parameters:

title - The title of the dial

setUnits

public void setUnits(String units)

Sets the unit for the dial value

Parameters:

units - The dial units

getLogger

public Log getLogger()

Gets the logger for his component.

Specified by:

getLogger in class BaseUIComponent

Returns:

logger This component's logger

validate

public boolean validate()

Validate that this component can generate the requested dial

Specified by:

validate in interface IUIComponent

Specified by:

validate in class BaseUIComponent

getXmlContent

public Document getXmlContent()

Create a dial image.

• Load the specified XML document describing the dial definition
• Create a dial definition object from the XML definition
• Use the JFreeChartEngine to create a dial image
• Create an XML document describing the dial
• Return the XML document

Specified by:

getXmlContent in interface IXMLComponent

Specified by:

getXmlContent in class XmlComponent

Returns:

The XML document describing this dial

dispose

public void dispose()