Java tutorial
/* 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.explorer.ui.custom; import java.util.HashMap; import java.util.Map; import org.activiti.explorer.ExplorerApp; import org.activiti.explorer.I18nManager; import org.activiti.explorer.Messages; import org.activiti.explorer.ui.mainlayout.ExplorerLayout; import com.vaadin.data.Item; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.data.Property.ValueChangeListener; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.Button.ClickListener; import com.vaadin.ui.Component; import com.vaadin.ui.Embedded; import com.vaadin.ui.GridLayout; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Table; import com.vaadin.ui.Table.CellStyleGenerator; import com.vaadin.ui.themes.Reindeer; /** * Generic component for a popup window that allows to display * multiple selection tabs on the left, and displays * configured components matching those the selection on the right. * * Note: For best visual results, the components on the right * should be of fixed size, since the window width and heigh * is calculated based on these components * * @author Frederik Heremans * @author Joram Barrez */ public class TabbedSelectionWindow extends PopupWindow { private static final long serialVersionUID = 1L; protected I18nManager i18nManager; protected HorizontalLayout windowLayout; protected Table selectionTable; protected String currentSelection; protected Component currentComponent; protected Map<String, Component> components = new HashMap<String, Component>(); protected Map<String, ClickListener> listeners = new HashMap<String, Button.ClickListener>(); protected GridLayout selectedComponentLayout; protected Button okButton; public TabbedSelectionWindow(String title) { this.i18nManager = ExplorerApp.get().getI18nManager(); initWindow(title); initWindowLayout(); initSelectionTable(); initComponentLayout(); initActions(); } protected void initWindow(String title) { setCaption(title); center(); setModal(true); addStyleName(Reindeer.WINDOW_LIGHT); } protected void initWindowLayout() { windowLayout = new HorizontalLayout(); windowLayout.setSpacing(false); windowLayout.setMargin(true); windowLayout.setSizeFull(); setContent(windowLayout); } protected void initComponentLayout() { selectedComponentLayout = new GridLayout(1, 2); selectedComponentLayout.setSizeFull(); selectedComponentLayout.setMargin(true); selectedComponentLayout.setSpacing(true); selectedComponentLayout.addStyleName(ExplorerLayout.STYLE_RELATED_CONTENT_CREATE_DETAIL); windowLayout.addComponent(selectedComponentLayout); windowLayout.setExpandRatio(selectedComponentLayout, 1.0f); selectedComponentLayout.setRowExpandRatio(0, 1.0f); selectedComponentLayout.setColumnExpandRatio(0, 1.0f); } protected void initActions() { okButton = new Button(i18nManager.getMessage(Messages.BUTTON_OK)); selectedComponentLayout.addComponent(okButton, 0, 1); okButton.setEnabled(false); okButton.addListener(new ClickListener() { private static final long serialVersionUID = 1L; public void buttonClick(ClickEvent event) { listeners.get(currentSelection).buttonClick(event); close(); } }); selectedComponentLayout.setComponentAlignment(okButton, Alignment.BOTTOM_RIGHT); } protected void initSelectionTable() { selectionTable = new Table(); selectionTable.setSizeUndefined(); selectionTable.setColumnHeaderMode(Table.COLUMN_HEADER_MODE_HIDDEN); selectionTable.setSelectable(true); selectionTable.setImmediate(true); selectionTable.setNullSelectionAllowed(false); selectionTable.setWidth(150, UNITS_PIXELS); selectionTable.setHeight(100, UNITS_PERCENTAGE); selectionTable.setCellStyleGenerator(new CellStyleGenerator() { private static final long serialVersionUID = 1L; public String getStyle(Object itemId, Object propertyId) { if ("name".equals(propertyId)) { return ExplorerLayout.STYLE_RELATED_CONTENT_CREATE_LIST_LAST_COLUMN; } return null; } }); selectionTable.addStyleName(ExplorerLayout.STYLE_RELATED_CONTENT_CREATE_LIST); selectionTable.addContainerProperty("type", Embedded.class, null); selectionTable.setColumnWidth("type", 22); selectionTable.addContainerProperty("name", String.class, null); // Listener to switch to the selected component selectionTable.addListener(new ValueChangeListener() { private static final long serialVersionUID = 1L; public void valueChange(ValueChangeEvent event) { String name = (String) event.getProperty().getValue(); if (name != null) { currentSelection = name; currentComponent = components.get(name); selectedComponentLayout.removeComponent(selectedComponentLayout.getComponent(0, 0)); if (currentComponent != null) { currentComponent.setSizeFull(); selectedComponentLayout.addComponent(currentComponent, 0, 0); okButton.setEnabled(true); } else { okButton.setEnabled(false); } } } }); windowLayout.addComponent(selectionTable); } /** * @param icon The 16x16 icon that will be displayed on the left in the selection table. * @param name The name that will be shown in the selection table * @param component The component that is selected when the item in the selection table is clicked. * @param clickListener The listener that will be attached to the OK button displayed beneath * the component. */ public void addSelectionItem(Embedded icon, String name, Component component, ClickListener clickListener) { Item item = selectionTable.addItem(name); item.getItemProperty("type").setValue(icon); item.getItemProperty("name").setValue(name); components.put(name, component); listeners.put(name, clickListener); } }