/*
* 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.actions.elements.distribute;
import java.awt.event.ActionEvent;
import java.awt.geom.Point2D;
import java.util.Arrays;
import java.util.Comparator;
import javax.swing.Action;
import org.pentaho.reporting.designer.core.actions.AbstractElementSelectionAction;
import org.pentaho.reporting.designer.core.actions.ActionMessages;
import org.pentaho.reporting.designer.core.editor.report.drag.MoveDragOperation;
import org.pentaho.reporting.designer.core.editor.report.snapping.EmptySnapModel;
import org.pentaho.reporting.designer.core.model.CachedLayoutData;
import org.pentaho.reporting.designer.core.model.ModelUtility;
import org.pentaho.reporting.designer.core.model.selection.ReportSelectionModel;
import org.pentaho.reporting.designer.core.util.IconLoader;
import org.pentaho.reporting.designer.core.util.undo.MassElementStyleUndoEntry;
import org.pentaho.reporting.designer.core.util.undo.MassElementStyleUndoEntryBuilder;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.util.geom.StrictGeomUtility;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public final class DistributeBottomAction extends AbstractElementSelectionAction
{
private static class ElementPositionComparator implements Comparator<Element>
{
public int compare(final Element o1, final Element o2)
{
final CachedLayoutData data1 = ModelUtility.getCachedLayoutData(o1);
final long x1 = data1.getY() + data1.getHeight();
final CachedLayoutData data2 = ModelUtility.getCachedLayoutData(o2);
final long x2 = data2.getY() + data2.getHeight();
if (x1 < x2)
{
return -1;
}
if (x1 > x2)
{
return +1;
}
return 0;
}
}
public DistributeBottomAction()
{
putValue(Action.NAME, ActionMessages.getString("DistributeBottomAction.Text"));
putValue(Action.SHORT_DESCRIPTION, ActionMessages.getString("DistributeBottomAction.Description"));
putValue(Action.MNEMONIC_KEY, ActionMessages.getOptionalMnemonic("DistributeBottomAction.Mnemonic"));
putValue(Action.SMALL_ICON, IconLoader.getInstance().getDistributeBottomIcon());
putValue(Action.ACCELERATOR_KEY, ActionMessages.getString("DistributeBottomAction.Accelerator"));
}
/**
* Invoked when an action occurs.
*/
public void actionPerformed(final ActionEvent e)
{
final ReportSelectionModel model = getSelectionModel();
if (model == null)
{
return;
}
final Element[] visualElements = model.getSelectedVisualElements();
if (visualElements.length <= 2)
{
return;
}
final Element[] reportElements = ModelUtility.filterParents(visualElements);
if (reportElements.length <= 2)
{
return;
}
Arrays.sort(reportElements, new ElementPositionComparator());
final MassElementStyleUndoEntryBuilder builder = new MassElementStyleUndoEntryBuilder(reportElements);
final Element[] carrier = new Element[1];
final int lastElementIdx = reportElements.length - 1;
final Element lastElement = reportElements[lastElementIdx];
final Element firstElement = reportElements[0];
final CachedLayoutData firstLayoutData = ModelUtility.getCachedLayoutData(firstElement);
final CachedLayoutData lastLayoutData = ModelUtility.getCachedLayoutData(lastElement);
final long height = (lastLayoutData.getY() + lastLayoutData.getHeight()) -
(firstLayoutData.getY() + firstLayoutData.getHeight());
final long incr = height / lastElementIdx;
long currentY = firstLayoutData.getY() + firstLayoutData.getHeight();
currentY += incr;//start from second element
for (int i = 1; i < lastElementIdx; i++)
{
final Element reportElement = reportElements[i];
final CachedLayoutData layoutData = ModelUtility.getCachedLayoutData(reportElement);
final long delta = currentY - layoutData.getHeight();
if (delta == 0)
{
continue;
}
carrier[0] = reportElement;
final Point2D.Double originPoint = new Point2D.Double(0, StrictGeomUtility.toExternalValue(layoutData.getY()));
final MoveDragOperation mop = new MoveDragOperation
(carrier, originPoint, EmptySnapModel.INSTANCE, EmptySnapModel.INSTANCE);
mop.update(new Point2D.Double(0, StrictGeomUtility.toExternalValue(delta)), 1);
mop.finish();
currentY += incr;
}
final MassElementStyleUndoEntry massElementStyleUndoEntry = builder.finish();
getActiveContext().getUndo().addChange(ActionMessages.getString("DistributeBottomAction.UndoName"), massElementStyleUndoEntry);
}
}