org.pmedv.blackboard.commands.DeleteCommand.java Source code

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Here is the source code for org.pmedv.blackboard.commands.DeleteCommand.java

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/**
    
   BlackBoard breadboard designer
   Written and maintained by Matthias Pueski 
       
   Copyright (c) 2010-2011 Matthias Pueski
       
   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.
       
   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 General Public License for more details.
       
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
    
*/
package org.pmedv.blackboard.commands;

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.ArrayList;

import javax.swing.Action;
import javax.swing.KeyStroke;
import javax.swing.undo.UndoManager;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pmedv.blackboard.EditorUtils;
import org.pmedv.blackboard.app.FileState;
import org.pmedv.blackboard.components.BoardEditor;
import org.pmedv.blackboard.components.Item;
import org.pmedv.blackboard.components.Layer;
import org.pmedv.blackboard.models.BoardEditorModel;
import org.pmedv.core.commands.AbstractCommand;
import org.pmedv.core.context.AppContext;
import org.pmedv.core.util.ErrorUtils;
import org.springframework.context.ApplicationContext;

/**
 * The delete command deletes one or more selected item(s)
 * from the board.
 * 
 * @see BoardEditorModel
 * @see BoardEditor
 * 
 * @author Matthias Pueski (18.06.2011)
 *
 */
public class DeleteCommand extends AbstractCommand {

    private static final long serialVersionUID = -1204971682381964487L;

    private static final Log log = LogFactory.getLog(DeleteCommand.class);

    public DeleteCommand() {
        putValue(Action.NAME, resources.getResourceByKey("DeleteCommand.name"));
        putValue(Action.SMALL_ICON, resources.getIcon("icon.delete"));
        putValue(Action.SHORT_DESCRIPTION, resources.getResourceByKey("DeleteCommand.description"));
        putValue(Action.ACCELERATOR_KEY, KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0));
        setEnabled(false);
    }

    @Override
    public void execute(ActionEvent e) {

        ArrayList<Item> deletedItems = new ArrayList<Item>();

        ApplicationContext ctx = AppContext.getContext();
        BoardEditor editor = EditorUtils.getCurrentActiveEditor();
        UndoManager undoManager = editor.getUndoManager();

        try {

            if (editor.getSelectedItems().size() >= 1) {
                editor.clearSelectionBorder();
                for (Item item : editor.getSelectedItems()) {
                    deletedItems.add(item);
                    for (Layer layer : editor.getModel().getLayers())
                        layer.getItems().remove(item);
                }
                editor.getSelectedItems().clear();
                editor.refresh();
            } else {
                if (editor.getSelectedItem() == null)
                    return;
                editor.clearSelectionBorder();
                deletedItems.add(editor.getSelectedItem());
                for (Layer layer : editor.getModel().getLayers())
                    layer.getItems().remove(editor.getSelectedItem());
                editor.setSelectedItem(null);
                editor.refresh();
            }

            editor.setFileState(FileState.DIRTY);

            log.info("Deleting " + deletedItems.size() + " items.");

            DeleteEdit de = new DeleteEdit(deletedItems);

            if (!undoManager.addEdit(de)) {
                log.error("could not add edit to undo manager");
            }

        } catch (Exception e1) {
            ErrorUtils.showErrorDialog(e1);
        }

        ctx.getBean(RedoCommand.class).setEnabled(undoManager.canRedo());
        ctx.getBean(UndoCommand.class).setEnabled(undoManager.canUndo());

    }

}