org.activiti.kickstart.ui.popup.ProcessImagePopupWindow.java Source code

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Here is the source code for org.activiti.kickstart.ui.popup.ProcessImagePopupWindow.java

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/* Licensed 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 org.activiti.kickstart.ui.popup;

import java.io.InputStream;
import java.util.UUID;

import org.activiti.kickstart.diagram.ProcessDiagramGenerator;
import org.activiti.kickstart.dto.KickstartWorkflowDto;
import org.activiti.kickstart.service.KickstartService;
import org.activiti.kickstart.service.ServiceLocator;
import org.activiti.kickstart.ui.ViewManager;

import com.vaadin.terminal.StreamResource;
import com.vaadin.terminal.StreamResource.StreamSource;
import com.vaadin.ui.Embedded;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Panel;
import com.vaadin.ui.Window;
import com.vaadin.ui.themes.Reindeer;

/**
 * @author Joram Barrez
 */
public class ProcessImagePopupWindow extends Window {

    private static final long serialVersionUID = -1483000500366042513L;

    protected static final String TITLE = "Process image";

    protected ViewManager viewManager;
    protected KickstartWorkflowDto adhocWorkflow;
    protected String processDefinitionId;
    protected KickstartService adhocWorkflowService;

    public ProcessImagePopupWindow(ViewManager viewManager, String processDefinitionId) {
        this.processDefinitionId = processDefinitionId;
        init(viewManager);
    }

    public ProcessImagePopupWindow(ViewManager viewManager, KickstartWorkflowDto adhocWorkflow) {
        this.adhocWorkflow = adhocWorkflow;
        init(viewManager);
    }

    public void init(ViewManager viewManager) {
        this.viewManager = viewManager;
        this.adhocWorkflowService = ServiceLocator.getAdhocWorkflowService();
        initUi();
    }

    protected void initUi() {
        setModal(true);
        setHeight("80%");
        setWidth("80%");
        center();
        setCaption(TITLE);

        StreamResource.StreamSource streamSource = null;
        if (processDefinitionId != null) {
            streamSource = new StreamSource() {

                private static final long serialVersionUID = -8875067466181823014L;

                public InputStream getStream() {
                    return adhocWorkflowService.getProcessImage(processDefinitionId);
                }
            };
        } else if (adhocWorkflow != null) {
            final ProcessDiagramGenerator converter = new ProcessDiagramGenerator(adhocWorkflow);
            streamSource = new StreamSource() {

                private static final long serialVersionUID = 239500411112658830L;

                public InputStream getStream() {
                    return converter.execute();
                }
            };
        }

        // resource must have unique id!
        StreamResource imageresource = new StreamResource(streamSource, UUID.randomUUID() + ".png",
                viewManager.getApplication());
        Panel panel = new Panel();
        panel.setContent(new HorizontalLayout());
        panel.setStyleName(Reindeer.PANEL_LIGHT);
        panel.setHeight("95%");
        Embedded embedded = new Embedded("", imageresource);
        embedded.setType(Embedded.TYPE_IMAGE);
        panel.addComponent(embedded);
        addComponent(panel);
    }

}