/*!
* 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.actions.elements.move;

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.selection.DocumentContextSelectionModel;
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.event.ReportModelEvent;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.util.List;

public final class MoveUpOneAction extends AbstractElementSelectionAction {
  public MoveUpOneAction() {
    putValue( Action.NAME, ActionMessages.getString( "MoveUpOneAction.Text" ) );
    putValue( Action.SHORT_DESCRIPTION, ActionMessages.getString( "MoveUpOneAction.Description" ) );
    putValue( Action.MNEMONIC_KEY, ActionMessages.getOptionalMnemonic( "MoveUpOneAction.Mnemonic" ) );
    putValue( Action.ACCELERATOR_KEY, ActionMessages.getOptionalKeyStroke( "MoveUpOneAction.Accelerator" ) );
  }

  protected void selectedElementPropertiesChanged( final ReportModelEvent event ) {
  }

  /**
   * Invoked when an action occurs.
   */
  public void actionPerformed( final ActionEvent e ) {
    final DocumentContextSelectionModel model = getSelectionModel();
    if ( model == null ) {
      return;
    }
    final List<Element> visualElements = model.getSelectedElementsOfType( Element.class );
    if ( visualElements.isEmpty() ) {
      return;
    }

    final MassElementStyleUndoEntryBuilder builder = new MassElementStyleUndoEntryBuilder( visualElements );
    final MoveDragOperation mop = new MoveDragOperation
      ( visualElements, new Point(), EmptySnapModel.INSTANCE, EmptySnapModel.INSTANCE );
    mop.update( new Point( 0, -1 ), 1 );
    mop.finish();

    final MassElementStyleUndoEntry massElementStyleUndoEntry = builder.finish();
    getActiveContext().getUndo().addChange
      ( ActionMessages.getString( "MoveUpOneAction.UndoName" ), massElementStyleUndoEntry );
  }
}