Bug 104986 Backgound image uses an absolute path
Currently Chart uses an absolute path to indicate a backgournd image, that may cause the design unusable on other environments. Expected the background image can be definded in multiple ways like in report designer. e.g. URI(absolute path), File(relative path), Embedded Image(Encoded Image Data).
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/attribute/CallBackValue.java
/**
 * <copyright>
 * </copyright>
 *
 * $Id$
 */
package org.eclipse.birt.chart.model.attribute;
/**
 * <!-- begin-user-doc --> A representation of the model object '<em><b>Call Back Value</b></em>'.
 * <!-- end-user-doc -->
 *
 * <!-- begin-model-doc -->
 * 
 * 			This type defines the value for a 'CallBack' action.
 * 		
 * <!-- end-model-doc -->
 *
 * <p>
 * The following features are supported:
 * <ul>
 *   <li>{@link org.eclipse.birt.chart.model.attribute.CallBackValue#getIdentifier <em>Identifier</em>}</li>
 * </ul>
 * </p>
 *
 * @see org.eclipse.birt.chart.model.attribute.AttributePackage#getCallBackValue()
 * @model extendedMetaData="name='CallBackValue' kind='elementOnly'"
 * @generated
 */
public interface CallBackValue extends ActionValue