de.decidr.workflowmodeleditor.client.menu.ClearWorkflowMenuItem.java Source code

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Here is the source code for de.decidr.workflowmodeleditor.client.menu.ClearWorkflowMenuItem.java

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/*
 * The DecidR Development Team licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package de.decidr.workflowmodeleditor.client.menu;

import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.Window;

import de.decidr.modelingtoolbase.client.command.ClearWorkflowCanvasCommand;
import de.decidr.modelingtoolbase.client.command.CreateStartEndNodeCommand;
import de.decidr.modelingtoolbase.client.exception.IncompleteModelDataException;
import de.decidr.modelingtoolbase.client.model.IdGenerator;
import de.decidr.modelingtoolbase.client.model.nodes.EndNodeModel;
import de.decidr.modelingtoolbase.client.model.nodes.StartNodeModel;
import de.decidr.workflowmodeleditor.client.WorkflowEditorWidget;

/**
 * This command clears the workflow from all nodes and container and only leaves
 * a start and end node.
 * 
 * @author Johannes Engelhardt
 * @author Daniel Willig
 */
public class ClearWorkflowMenuItem extends AbstractMenuItem implements Command {

    /**
     * Creates a new ClearWorkflowMenuItem.
     * 
     * @param widget
     *            The widget that owns this menu item.
     */
    public ClearWorkflowMenuItem(WorkflowEditorWidget widget) {
        super();
        setWidget(widget);
    }

    @Override
    public void execute() {
        if (Window.confirm(WorkflowEditorWidget.getMessages().confirmClearWorkflow())) {

            new ClearWorkflowCanvasCommand(getWidget().getWorkflowCanvas()).execute();
            try {
                /*
                 * Add start & end nodes.
                 */
                EndNodeModel endNodeModel = new EndNodeModel(getWidget().getWorkflowCanvas().getModel());
                endNodeModel.setName(EndNodeModel.class.getName());
                endNodeModel.setId(IdGenerator.generateId());
                endNodeModel.setChangeListenerPosition(80, 100);

                StartNodeModel startNodeModel = new StartNodeModel(getWidget().getWorkflowCanvas().getModel());
                startNodeModel.setName(StartNodeModel.class.getName());
                startNodeModel.setId(IdGenerator.generateId());
                startNodeModel.setChangeListenerPosition(10, 10);

                new CreateStartEndNodeCommand(endNodeModel, getWidget().getWorkflowCanvas()).execute();
                new CreateStartEndNodeCommand(startNodeModel, getWidget().getWorkflowCanvas()).execute();
            } catch (IncompleteModelDataException e) {
                // not expected to happen
                throw new RuntimeException(e);
            }
        }
    }
}