Java tutorial
/* * Copyright 2010 Instituto Superior Tecnico * * https://fenix-ashes.ist.utl.pt/ * * This file is part of the vaadin-framework. * * The vaadin-framework Infrastructure is free software: you can * redistribute it and/or modify it under the terms of the GNU Lesser General * Public License as published by the Free Software Foundation, either version * 3 of the License, or (at your option) any later version.* * * vaadin-framework 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with vaadin-framework. If not, see <http://www.gnu.org/licenses/>. * */ package pt.ist.vaadinframework.ui.fields; import java.util.ArrayList; import org.apache.commons.lang.StringUtils; import pt.ist.vaadinframework.VaadinResourceConstants; import pt.ist.vaadinframework.VaadinResources; import pt.ist.vaadinframework.data.AbstractBufferedContainer; import pt.ist.vaadinframework.ui.TransactionalTable; import com.vaadin.data.Container; import com.vaadin.data.Container.Indexed; import com.vaadin.data.Container.ItemSetChangeEvent; import com.vaadin.data.Property; import com.vaadin.terminal.ThemeResource; 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.CustomComponent; import com.vaadin.ui.FieldWrapper; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Table; import com.vaadin.ui.Table.ColumnGenerator; import com.vaadin.ui.TableFieldFactory; import com.vaadin.ui.VerticalLayout; import com.vaadin.ui.themes.BaseTheme; public class ContainerEditor<PC> extends FieldWrapper<PC> { public static class OrderChanger extends CustomComponent { private final Button up = new Button(); private final Button down = new Button(); public OrderChanger(final Indexed container, final Object itemId) { HorizontalLayout layout = new HorizontalLayout(); layout.addComponent(up); up.setIcon(new ThemeResource("../runo/icons/32/arrow-up.png")); up.addStyleName(BaseTheme.BUTTON_LINK); up.addListener(new ClickListener() { @Override public void buttonClick(ClickEvent event) { int newIndex = container.indexOfId(itemId) - 1; container.removeItem(itemId); container.addItemAt(newIndex, itemId); up.setEnabled(newIndex > 0); } }); up.setEnabled(container.indexOfId(itemId) > 0); layout.addComponent(down); down.setIcon(new ThemeResource("../runo/icons/32/arrow-down.png")); down.addStyleName(BaseTheme.BUTTON_LINK); down.addListener(new ClickListener() { @Override public void buttonClick(ClickEvent event) { int newIndex = container.indexOfId(itemId) + 1; container.removeItem(itemId); container.addItemAt(newIndex, itemId); down.setEnabled(newIndex < container.size() - 1); } }); down.setEnabled(container.indexOfId(itemId) < container.size() - 1); setCompositionRoot(layout); } } public static class ContainerEditorTable extends TransactionalTable { public ContainerEditorTable(TableFieldFactory factory, String bundlename) { super(bundlename); setWidth(100, UNITS_PERCENTAGE); setPageLength(0); setTableFieldFactory(factory); setEditable(true); addGeneratedColumn("index", new ColumnGenerator() { @Override public Component generateCell(Table source, Object itemId, Object columnId) { return new OrderChanger((Indexed) getContainerDataSource(), itemId); } }); addGeneratedColumn(StringUtils.EMPTY, new ColumnGenerator() { @Override public Component generateCell(final Table source, final Object itemId, Object columnId) { Button delete = new Button( VaadinResources.getString(VaadinResourceConstants.COMMONS_ACTION_DELETE)); delete.addStyleName(BaseTheme.BUTTON_LINK); delete.addListener(new ClickListener() { @Override public void buttonClick(ClickEvent event) { source.getContainerDataSource().removeItem(itemId); } }); return delete; } }); // setVisible(size() > 0); addListener(new ItemSetChangeListener() { @Override public void containerItemSetChange(ItemSetChangeEvent event) { setVisible(event.getContainer().size() > 0); } }); } @Override protected boolean isEmpty() { return getContainerDataSource().size() == 0; } @Override public void setPropertyDataSource(Property newDataSource) { if (newDataSource instanceof Container) { super.setContainerDataSource((Container) newDataSource); ArrayList<Object> columns = new ArrayList<Object>(); if (newDataSource instanceof Indexed) { columns.add("index"); setColumnWidth("index", 77); } columns.addAll(((Container) newDataSource).getContainerPropertyIds()); columns.add(StringUtils.EMPTY); setVisibleColumns(columns.toArray(new Object[0])); } } } public ContainerEditor(TableFieldFactory factory, String bundlename, Class<? extends PC> type) { super(new ContainerEditorTable(factory, bundlename), null, type); final VerticalLayout layout = new VerticalLayout(); layout.setSpacing(true); layout.addComponent(getWrappedField()); Button add = new Button(VaadinResources.getString(VaadinResourceConstants.COMMONS_ACTION_ADD)); add.addStyleName(BaseTheme.BUTTON_LINK); layout.addComponent(add); add.addListener(new ClickListener() { @Override public void buttonClick(ClickEvent event) { if (getWrappedField().getContainerDataSource() instanceof AbstractBufferedContainer) { AbstractBufferedContainer<PC, ?, ?> container = (AbstractBufferedContainer<PC, ?, ?>) getWrappedField() .getContainerDataSource(); container.addItem(container.getElementType()); } else { getWrappedField().getContainerDataSource().addItem(); } } }); setCompositionRoot(layout); } @Override protected boolean isEmpty() { return getWrappedField().getContainerDataSource().size() == 0; } @Override protected ContainerEditorTable getWrappedField() { return (ContainerEditorTable) super.getWrappedField(); } public void setColumnHeaderMode(int columnHeaderMode) { getWrappedField().setColumnHeaderMode(columnHeaderMode); } public void setColumnExpandRatio(Object propertyId, float expandRatio) { getWrappedField().setColumnExpandRatio(propertyId, expandRatio); } public void setColumnWidth(Object propertyId, int width) { getWrappedField().setColumnWidth(propertyId, width); } public void addGeneratedColumn(Object id, ColumnGenerator generatedColumn) { getWrappedField().addGeneratedColumn(id, generatedColumn); } }