/*
* 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) 2009 Pentaho Corporation. All rights reserved.
*/
package org.pentaho.reporting.designer.core.editor.report.elements;
import java.awt.Container;
import java.awt.Point;
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;
import org.pentaho.reporting.designer.core.editor.ReportRenderContext;
import org.pentaho.reporting.designer.core.editor.report.DndElementOverlay;
import org.pentaho.reporting.designer.core.editor.report.ReportElementDragHandler;
import org.pentaho.reporting.designer.core.editor.report.ReportElementEditorContext;
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.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.libraries.fonts.tools.StrictGeomUtility;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class BandReportElementDragHandler implements ReportElementDragHandler
{
protected static final Float DEFAULT_WIDTH = new Float(100);
protected static final Float DEFAULT_HEIGHT = new Float(20);
private DndElementOverlay representation;
public BandReportElementDragHandler()
{
representation = new DndElementOverlay();
}
public int dragStarted(final DropTargetDragEvent event,
final ReportElementEditorContext dragContext,
final ElementMetaData elementMetaData,
final String fieldName)
{
final Container representationContainer = dragContext.getRepresentationContainer();
final ReportRenderContext 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;
}
representation.setZoom(renderContext.getZoomModel().getZoomAsPercentage());
representation.setVisible(true);
representation.setText(elementMetaData.getDisplayName(Locale.getDefault()));
representation.setLocation(pos.x, pos.y);
representation.setSize(representation.getMinimumSize());
representationContainer.removeAll();
representationContainer.add(representation);
return DnDConstants.ACTION_COPY;
}
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 ElementType type = elementMetaData.create();
final Element visualElement = new Band();
type.configureDesignTimeDefaults(visualElement, Locale.getDefault());
final ElementStyleSheet styleSheet = visualElement.getStyle();
final Point2D point = dragContext.normalize(event.getLocation());
styleSheet.setStyleProperty(ElementStyleKeys.MIN_WIDTH, DEFAULT_WIDTH);
styleSheet.setStyleProperty(ElementStyleKeys.MIN_HEIGHT, DEFAULT_HEIGHT);
final Element element = dragContext.getElementForLocation(point, false);
final Band band;
if (element instanceof Band)
{
band = (Band) element;
}
else if (element != null)
{
band = element.getParent();
}
else
{
final Element defaultEntry = dragContext.getDefaultElement();
if (defaultEntry instanceof Band == false)
{
event.rejectDrop();
dragContext.getRepresentationContainer().removeAll();
return;
}
band = (Band) defaultEntry;
}
event.acceptDrop(DnDConstants.ACTION_COPY);
styleSheet.setStyleProperty(ElementStyleKeys.POS_X, new Float(Math.max(0, point.getX() - getParentX(band))));
styleSheet.setStyleProperty(ElementStyleKeys.POS_Y, new Float(Math.max(0, point.getY() - getParentY(band))));
final ReportRenderContext context = dragContext.getRenderContext();
final UndoManager undo = context.getUndo();
undo.addChange(new ElementEditUndoEntry(band.getObjectID(), band.getElementCount(), null, visualElement));
band.addElement(visualElement);
dragContext.getRenderContext().getSelectionModel().setSelectedElements(new Object[]{visualElement});
representation.setVisible(false);
dragContext.getRepresentationContainer().removeAll();
event.dropComplete(true);
}
catch (final Exception e)
{
UncaughtExceptionsModel.getInstance().addException(e);
dragContext.getRepresentationContainer().removeAll();
event.dropComplete(false);
}
}
private double getParentX(final Band band)
{
final CachedLayoutData data = ModelUtility.getCachedLayoutData(band);
return StrictGeomUtility.toExternalValue(data.getX());
}
private double getParentY(final Band band)
{
final CachedLayoutData data = ModelUtility.getCachedLayoutData(band);
return StrictGeomUtility.toExternalValue(data.getY());
}
}