DefaultReportElementDragHandler.java example

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pentaho-reporting-master
/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
*/

package org.pentaho.reporting.designer.core.editor.report.elements;

import org.pentaho.reporting.designer.core.editor.ReportDocumentContext;
import org.pentaho.reporting.designer.core.editor.report.AbstractReportElementDragHandler;
import org.pentaho.reporting.designer.core.model.ModelUtility;
import org.pentaho.reporting.engine.classic.core.AbstractReportDefinition;
import org.pentaho.reporting.engine.classic.core.AttributeNames;
import org.pentaho.reporting.engine.classic.core.DataFactory;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.MetaAttributeNames;
import org.pentaho.reporting.engine.classic.core.metadata.DataFactoryMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.ElementMetaData;
import org.pentaho.reporting.engine.classic.core.metadata.ElementType;
import org.pentaho.reporting.engine.classic.core.style.ElementStyleKeys;
import org.pentaho.reporting.engine.classic.core.style.ElementStyleSheet;
import org.pentaho.reporting.engine.classic.core.wizard.ContextAwareDataSchemaModel;
import org.pentaho.reporting.engine.classic.core.wizard.DataAttributes;

import java.util.Locale;

public class DefaultReportElementDragHandler extends AbstractReportElementDragHandler {
  public DefaultReportElementDragHandler() {
  }

  protected Element createElement( final ElementMetaData elementMetaData,
                                   final String fieldName,
                                   final ReportDocumentContext context ) throws InstantiationException {
    final ElementType type = elementMetaData.create();
    final Element visualElement = (Element) type.create();

    final ElementStyleSheet styleSheet = visualElement.getStyle();
    styleSheet.setStyleProperty( ElementStyleKeys.MIN_WIDTH, DEFAULT_WIDTH );
    styleSheet.setStyleProperty( ElementStyleKeys.MIN_HEIGHT, DEFAULT_HEIGHT );

    type.configureDesignTimeDefaults( visualElement, Locale.getDefault() );
    if ( elementMetaData.getAttributeDescription( AttributeNames.Core.NAMESPACE, AttributeNames.Core.FIELD ) != null ) {
      visualElement.setAttribute( AttributeNames.Core.NAMESPACE, AttributeNames.Core.FIELD, fieldName );
    }

    configureWizardProperties( fieldName, context, visualElement );

    return visualElement;
  }

  private void configureWizardProperties( final String fieldName,
                                          final ReportDocumentContext context,
                                          final Element visualElement ) {
    final ContextAwareDataSchemaModel model = context.getReportDataSchemaModel();
    if ( fieldName == null ) {
      return;
    }

    final DataAttributes attributes = model.getDataSchema().getAttributes( fieldName );
    final String source = (String) attributes.getMetaAttribute
      ( MetaAttributeNames.Core.NAMESPACE, MetaAttributeNames.Core.SOURCE, String.class,
        model.getDataAttributeContext() );
    if ( !MetaAttributeNames.Core.SOURCE_VALUE_TABLE.equals( source ) ) {
      return;
    }

    final AbstractReportDefinition report = context.getReportDefinition();
    final DataFactory dataFactory = ModelUtility.findDataFactoryForQuery( report, report.getQuery() );
    if ( dataFactory == null ) {
      return;
    }

    final DataFactoryMetaData data = dataFactory.getMetaData();
    if ( data.isFormattingMetaDataSource() ) {
      visualElement
        .setAttribute( AttributeNames.Wizard.NAMESPACE, AttributeNames.Wizard.ALLOW_METADATA_ATTRIBUTES, Boolean.TRUE );
      visualElement
        .setAttribute( AttributeNames.Wizard.NAMESPACE, AttributeNames.Wizard.ALLOW_METADATA_STYLING, Boolean.TRUE );
    }
  }

}