KickstartWorkflowPanel.java

/* 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.panel;

import org.activiti.kickstart.KickstartApplication;
import org.activiti.kickstart.dto.KickstartTask;
import org.activiti.kickstart.dto.KickstartUserTask;
import org.activiti.kickstart.dto.KickstartWorkflow;
import org.activiti.kickstart.service.KickstartService;
import org.activiti.kickstart.service.KickstartServiceFactory;
import org.activiti.kickstart.ui.ViewManager;
import org.activiti.kickstart.ui.popup.ErrorPopupWindow;
import org.activiti.kickstart.ui.popup.ProcessImagePopupWindow;
import org.activiti.kickstart.ui.table.TaskTable;

import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.data.Property.ValueChangeListener;
import com.vaadin.terminal.ClassResource;
import com.vaadin.terminal.Resource;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.GridLayout;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.Panel;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.Reindeer;

/**
 * @author Joram Barrez
 */
public class KickstartWorkflowPanel extends Panel {

	protected static final long serialVersionUID = -2074647293591779784L;

	protected static final String NEW_WORKFLOW_TITLE = "Create new adhoc workflow";
	protected static final String EXISTING_WORKFLOW_TITLE = "Edit workflow";
	protected static final String NAME_FIELD = "Name";
	protected static final String DESCRIPTION_FIELD = "Description";

	// ui
	protected Label titleLabel;
	protected TextField nameField;
	protected TextField descriptionField;
	protected TaskTable taskTable;
	protected Resource saveImage;
	protected Resource generateImageImage;

	// dependencies
	protected KickstartService kickStartService;
	protected KickstartWorkflow existingWorkflow;

	public KickstartWorkflowPanel(KickstartWorkflow existingWorkflow) {
		this.existingWorkflow = existingWorkflow;
		this.saveImage = new ClassResource("images/page_save.png", KickstartApplication.get());
		this.generateImageImage = new ClassResource("images/image.png", KickstartApplication.get());
		init();
	}

	public KickstartWorkflowPanel() {
		this(null);
	}

	protected void init() {
		setSizeFull();
		setStyleName(Reindeer.PANEL_LIGHT);
		this.kickStartService = KickstartApplication.get().getKickstartService();
		initUi();
	}

	protected void initUi() {
		initTitle();

		GridLayout layout = new GridLayout(2, 7);
		layout.setSizeFull();
		layout.setColumnExpandRatio(0, 1.0f);
		layout.setColumnExpandRatio(1, 9.0f);
		layout.setSpacing(true);
		addComponent(layout);

		initNameField(layout);
		initDescriptionField(layout);
		initTaskTable(layout);
		initButtons(layout);
	}

	protected void initTitle() {
		VerticalLayout verticalLayout = new VerticalLayout();
		if (existingWorkflow == null) {
			titleLabel = new Label(NEW_WORKFLOW_TITLE);
		} else {
			titleLabel = new Label(EXISTING_WORKFLOW_TITLE + " '" + existingWorkflow.getName() + "'");
		}
		titleLabel.setStyleName(Reindeer.LABEL_H1);
		verticalLayout.addComponent(titleLabel);

		// add some empty space
		Label emptyLabel = new Label("");
		emptyLabel.setHeight("1.5em");
		verticalLayout.addComponent(emptyLabel);

		addComponent(verticalLayout);
	}

	protected void initNameField(GridLayout layout) {
		nameField = new TextField();
		nameField.setWriteThrough(true);
		nameField.setImmediate(true);
		if (existingWorkflow != null) {
			nameField.setValue(existingWorkflow.getName());
		}

		layout.addComponent(new Label(NAME_FIELD));
		layout.addComponent(nameField);
	}

	protected void initDescriptionField(GridLayout layout) {
		descriptionField = new TextField();
		descriptionField.setRows(4);
		descriptionField.setColumns(35);
		if (existingWorkflow != null) {
			descriptionField.setValue(existingWorkflow.getDescription());
		}
		layout.addComponent(new Label(DESCRIPTION_FIELD));
		layout.addComponent(descriptionField);
	}

	protected void initTaskTable(GridLayout layout) {
		taskTable = new TaskTable();
		if (existingWorkflow == null) {
			taskTable.addDefaultTaskRow();
		} else {
			for (KickstartTask task : existingWorkflow.getTasks()) {
				if (task instanceof KickstartUserTask) {
					taskTable.addTaskRow((KickstartUserTask) task);
				}
			}
		}

		layout.addComponent(new Label("Tasks"));
		layout.addComponent(taskTable);
	}

	protected void initButtons(GridLayout layout) {
		final Button saveButton = new Button("Save");
		saveButton.setEnabled(nameField.getValue() != null && !"".equals((String) nameField.getValue()));
		saveButton.setIcon(saveImage);
		saveButton.addListener(new Button.ClickListener() {

			private static final long serialVersionUID = 1L;

			public void buttonClick(ClickEvent event) {
				try {
					kickStartService.deployWorkflow(createWorkflow(), null);
					Panel successPanel = new Panel();
					successPanel.setStyleName(Reindeer.PANEL_LIGHT);
					Label successLabel = new Label("Process successfully deployed");
					successPanel.addComponent(successLabel);
					KickstartApplication.get().getViewManager().showComponent(successPanel);
				} catch (Exception e) {
					e.printStackTrace();
					KickstartApplication.get().getViewManager().showPopupWindow(new ErrorPopupWindow(e));
				}
			}
		});

		// Dependending on namefield value, save button is enabled
		nameField.addListener(new ValueChangeListener() {
			private static final long serialVersionUID = 1L;

			public void valueChange(ValueChangeEvent event) {
				if (nameField.getValue() != null && !"".equals((String) nameField.getValue())) {
					saveButton.setEnabled(true);
				} else {
					saveButton.setEnabled(false);
				}
			}
		});

		Button generateImageButton = new Button("View image");
		generateImageButton.setIcon(generateImageImage);
		generateImageButton.addListener(new Button.ClickListener() {

			private static final long serialVersionUID = 5671158538486627690L;

			public void buttonClick(ClickEvent event) {
				ViewManager viewManager = KickstartApplication.get().getViewManager();
				viewManager.showPopupWindow(new ProcessImagePopupWindow(createWorkflow()));
			}

		});

		HorizontalLayout footer = new HorizontalLayout();
		footer.setSpacing(true);
		footer.addComponent(saveButton);
		footer.addComponent(generateImageButton);
		layout.addComponent(new Label());
		layout.addComponent(footer);
	}

	protected KickstartWorkflow createWorkflow() {
		KickstartWorkflow workflow = new KickstartWorkflow();
		workflow.setName((String) nameField.getValue());
		workflow.setDescription((String) descriptionField.getValue());
		for (KickstartUserTask task : taskTable.getTasks()) {
			workflow.addTask(task);
		}
		return workflow;
	}

}