/*!
* 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;
import org.pentaho.reporting.designer.core.Messages;
import org.pentaho.reporting.designer.core.editor.ReportDocumentContext;
import org.pentaho.reporting.designer.core.model.CachedLayoutData;
import org.pentaho.reporting.designer.core.model.ModelUtility;
import org.pentaho.reporting.designer.core.util.exceptions.UncaughtExceptionsModel;
import org.pentaho.reporting.designer.core.util.undo.ElementEditUndoEntry;
import org.pentaho.reporting.designer.core.util.undo.UndoManager;
import org.pentaho.reporting.engine.classic.core.Band;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.Section;
import org.pentaho.reporting.engine.classic.core.metadata.ElementMetaData;
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.util.geom.StrictGeomUtility;
import java.awt.*;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.geom.Point2D;
import java.util.Locale;
public abstract class AbstractReportElementDragHandler implements ReportElementDragHandler {
protected static final Float DEFAULT_WIDTH = new Float( 100 );
protected static final Float DEFAULT_HEIGHT = new Float( 20 );
private DndElementOverlay representation;
public AbstractReportElementDragHandler() {
representation = new DndElementOverlay();
}
protected DndElementOverlay getRepresentation() {
return representation;
}
public int dragStarted( final DropTargetDragEvent event,
final ReportElementEditorContext dragContext,
final ElementMetaData elementMetaData,
final String fieldName ) {
final Container representationContainer = dragContext.getRepresentationContainer();
final ReportDocumentContext renderContext = dragContext.getRenderContext();
final Point pos = event.getLocation();
final Point2D point = dragContext.normalize( pos );
if ( point.getX() < 0 || point.getY() < 0 ) {
representationContainer.removeAll();
return DnDConstants.ACTION_NONE;
}
if ( isFilteredDropZone( event, dragContext, elementMetaData, point ) ) {
representationContainer.removeAll();
return DnDConstants.ACTION_NONE;
}
representation.setZoom( renderContext.getZoomModel().getZoomAsPercentage() );
representation.setVisible( true );
representation.setText( elementMetaData.getDisplayName( Locale.getDefault() ) );
representation.setLocation( pos.x, pos.y );
representation.setSize( 100, 20 );
representationContainer.removeAll();
representationContainer.add( representation );
return DnDConstants.ACTION_COPY;
}
protected boolean isFilteredDropZone( final DropTargetEvent event,
final ReportElementEditorContext dragContext,
final ElementMetaData elementMetaData,
final Point2D point ) {
return false;
}
public int dragUpdated( final DropTargetDragEvent event,
final ReportElementEditorContext dragContext,
final ElementMetaData elementMetaData,
final String fieldName ) {
return dragStarted( event, dragContext, elementMetaData, fieldName );
}
public void dragAborted( final DropTargetEvent event,
final ReportElementEditorContext dragContext ) {
final Container representationContainer = dragContext.getRepresentationContainer();
representationContainer.removeAll();
}
public void drop( final DropTargetDropEvent event,
final ReportElementEditorContext dragContext,
final ElementMetaData elementMetaData,
final String fieldName ) {
try {
final Point2D point = dragContext.normalize( event.getLocation() );
if ( isFilteredDropZone( event, dragContext, elementMetaData, point ) ) {
event.dropComplete( false );
return;
}
final Band band = getInsertionBand( event, dragContext, point );
if ( band == null ) {
event.dropComplete( false );
return;
}
final ReportDocumentContext context = dragContext.getRenderContext();
final Element visualElement = createElement( elementMetaData, fieldName, context );
final ElementStyleSheet styleSheet = visualElement.getStyle();
final double parentX = getParentX( band );
final double parentY = getParentY( band );
styleSheet.setStyleProperty( ElementStyleKeys.POS_X, new Float( Math.max( 0, point.getX() - parentX ) ) );
styleSheet.setStyleProperty( ElementStyleKeys.POS_Y, new Float( Math.max( 0, point.getY() - parentY ) ) );
postProcessDrop( visualElement, band, dragContext, point );
dragContext.getRenderContext().getSelectionModel().setSelectedElements( new Object[] { visualElement } );
event.acceptDrop( DnDConstants.ACTION_COPY );
getRepresentation().setVisible( false );
dragContext.getRepresentationContainer().removeAll();
event.dropComplete( true );
} catch ( final Exception e ) {
UncaughtExceptionsModel.getInstance().addException( e );
dragContext.getRepresentationContainer().removeAll();
event.dropComplete( false );
}
}
protected void postProcessDrop( final Element visualElement,
final Band target,
final ReportElementEditorContext dragContext,
final Point2D point ) {
final ReportDocumentContext context = dragContext.getRenderContext();
final UndoManager undo = context.getUndo();
undo.addChange( Messages.getString( "DefaultReportElementDragHandler.AddElementUndoEntry" ),
new ElementEditUndoEntry( target.getObjectID(), target.getElementCount(), null, visualElement ) );
target.addElement( visualElement );
}
protected abstract Element createElement( final ElementMetaData elementMetaData,
final String fieldName,
final ReportDocumentContext context ) throws InstantiationException;
protected Band getInsertionBand( final DropTargetDropEvent event,
final ReportElementEditorContext dragContext,
final Point2D point ) {
final Element elementForLocation = dragContext.getElementForLocation( point, false );
Band band;
if ( elementForLocation instanceof Band ) {
band = (Band) elementForLocation;
} else if ( elementForLocation != null ) {
band = elementForLocation.getParent();
} else {
band = null;
}
if ( band == null ) {
final Element defaultEntry = dragContext.getDefaultElement();
if ( defaultEntry instanceof Band == false ) {
event.rejectDrop();
dragContext.getRepresentationContainer().removeAll();
return null;
}
band = (Band) defaultEntry;
}
return band;
}
protected double getParentX( final Section band ) {
final CachedLayoutData data = ModelUtility.getCachedLayoutData( band );
if ( data.getLayoutAge() == -1 ) {
return getParentX( band.getParentSection() );
}
return StrictGeomUtility.toExternalValue( data.getX() );
}
protected double getParentY( final Section band ) {
final CachedLayoutData data = ModelUtility.getCachedLayoutData( band );
if ( data.getLayoutAge() == -1 ) {
return getParentY( band.getParentSection() );
}
return StrictGeomUtility.toExternalValue( data.getY() );
}
}