com.nextep.designer.dbgm.ui.handlers.EditDiagramItemHandler.java Source code

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Here is the source code for com.nextep.designer.dbgm.ui.handlers.EditDiagramItemHandler.java

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/*******************************************************************************
 * Copyright (c) 2011 neXtep Software and contributors.
 * All rights reserved.
 *
 * This file is part of neXtep designer.
 *
 * NeXtep designer 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 3 of the License, or any later version.
 *
 * NeXtep designer 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Contributors:
 *     neXtep Softwares - initial API and implementation
 *******************************************************************************/
package com.nextep.designer.dbgm.ui.handlers;

import java.text.MessageFormat;
import java.util.Iterator;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.handlers.HandlerUtil;
import com.nextep.datadesigner.model.ITypedObject;
import com.nextep.designer.dbgm.gef.editors.ConnectionEditPart;
import com.nextep.designer.dbgm.gef.editors.DiagramItemPart;
import com.nextep.designer.dbgm.ui.DBGMUIMessages;
import com.nextep.designer.ui.factories.UIControllerFactory;
import com.nextep.designer.vcs.model.IDiagramItem;

public class EditDiagramItemHandler extends AbstractHandler {

    /**
     * When selection contains more than this value, a confirmation will be required to open editors
     */
    private static final int WARN_DIALOG_ABOVE = 3;

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        ISelection s = HandlerUtil.getCurrentSelection(event);
        if (s instanceof IStructuredSelection) {
            final IStructuredSelection sel = (IStructuredSelection) s;
            if (!sel.isEmpty()) {
                if (sel.size() > WARN_DIALOG_ABOVE) {
                    final boolean confirmed = MessageDialog.openConfirm(HandlerUtil.getActiveShell(event),
                            MessageFormat.format(DBGMUIMessages.getString("editDiagramItemWarnCountTitle"),
                                    sel.size()),
                            MessageFormat.format(DBGMUIMessages.getString("editDiagramItemWarnCount"), sel.size(),
                                    sel.size()));
                    if (!confirmed) {
                        return null;
                    }
                }
                for (Iterator<?> it = sel.iterator(); it.hasNext();) {
                    final Object o = it.next();
                    if (o instanceof DiagramItemPart || o instanceof ConnectionEditPart) {
                        Object model = ((GraphicalEditPart) o).getModel();
                        Object innerModel = model;
                        if (model instanceof IDiagramItem) {
                            innerModel = ((IDiagramItem) model).getItemModel();
                        }
                        if (innerModel instanceof ITypedObject) {
                            UIControllerFactory.getController(((ITypedObject) innerModel).getType())
                                    .defaultOpen((ITypedObject) innerModel);
                        }

                    }

                }
            }
        }
        return null;
    }

}