Java tutorial
/** JEM, the BEE - Job Entry Manager, the Batch Execution Environment Copyright (C) 2012-2015 Andrea "Stock" Stocchero This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.pepstock.jem.gwt.client.panels.resources; import org.pepstock.jem.gwt.client.commons.AbstractTable; import org.pepstock.jem.gwt.client.commons.AnchorTextColumn; import org.pepstock.jem.gwt.client.commons.IndexedColumnComparator; import org.pepstock.jem.gwt.client.commons.JemConstants; import org.pepstock.jem.gwt.client.commons.TextFilterableHeader; import org.pepstock.jem.node.resources.Resource; import org.pepstock.jem.node.resources.ResourceProperty; import org.pepstock.jem.util.filters.fields.ResourceFilterFields; import com.google.gwt.cell.client.Cell.Context; import com.google.gwt.cell.client.CheckboxCell; import com.google.gwt.cell.client.ValueUpdater; import com.google.gwt.dom.client.Style.Unit; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.user.cellview.client.CellTable; import com.google.gwt.user.cellview.client.Column; import com.google.gwt.user.cellview.client.Header; import com.google.gwt.user.cellview.client.TextColumn; import com.google.gwt.view.client.SelectionModel; /** * Creates all columns to show into table, defening the sorter too. * * @author Andrea "Stock" Stocchero * */ public class ResourcesTable extends AbstractTable<Resource> { /** * Adds all columns to table, defining the sort columns too. */ @Override public IndexedColumnComparator<Resource> initCellTable(CellTable<Resource> table) { @SuppressWarnings("unchecked") final SelectionModel<Resource> selectionModel = (SelectionModel<Resource>) table.getSelectionModel(); Column<Resource, Boolean> checkColumn = new Column<Resource, Boolean>(new CheckboxCell(true, false)) { @Override public Boolean getValue(Resource role) { return selectionModel.isSelected(role); } }; CheckboxCell headerCheckBox = new CheckboxCell(true, false); Header<Boolean> checkHeader = new Header<Boolean>(headerCheckBox) { // imposta lo stato dell'header! @Override public Boolean getValue() { // se e' vuoto, niente e' selezionato/selezionabile if (getTable().getVisibleItems().isEmpty()) { return false; } // altrimenti testo for (Resource r : getTable().getVisibleItems()) { // se almeno un elemento non e' selezionato, l'header non deve essere selezionato if (!getTable().getSelectionModel().isSelected(r)) { return false; } } // altrimenti se arrivo qui, tutti gli elementi sono selezionati return true; } }; // updater che seleziona o deseleziona tutti gli elementi visibili in base al "valore" dell'header checkHeader.setUpdater(new ValueUpdater<Boolean>() { @Override public void update(Boolean value) { for (Resource r : getTable().getVisibleItems()) { getTable().getSelectionModel().setSelected(r, value); } } }); table.setColumnWidth(checkColumn, 23, Unit.PX); table.addColumn(checkColumn, checkHeader); AnchorTextColumn<Resource> name = new AnchorTextColumn<Resource>() { @Override public void onClick(int index, Resource object, String value) { getInspectListener().inspect(object); } @Override public String getValue(Resource resource) { return resource.getName(); } }; name.setSortable(true); table.addColumn(name, new TextFilterableHeader("Name", ResourceFilterFields.NAME.getName())); TextColumn<Resource> type = new TextColumn<Resource>() { @Override public String getValue(Resource resource) { return resource.getType(); } }; type.setSortable(true); table.addColumn(type, new TextFilterableHeader("Type", ResourceFilterFields.TYPE.getName())); AttributesColumn attributes = new AttributesColumn(); table.addColumn(attributes, new TextFilterableHeader("Properties", ResourceFilterFields.PROPERTIES.getName())); TextColumn<Resource> lastModified = new TextColumn<Resource>() { @Override public String getValue(Resource resource) { if (resource.getLastModified() == null) { return ""; } return JemConstants.DATE_TIME_FULL.format(resource.getLastModified()); } }; lastModified.setSortable(true); table.addColumn(lastModified, new TextFilterableHeader("Modified", ResourceFilterFields.MODIFIED.getName(), ResourceFilterFields.MODIFIED.getPattern())); TextColumn<Resource> user = new TextColumn<Resource>() { @Override public String getValue(Resource resource) { return resource.getUser() != null ? resource.getUser() : ""; } }; user.setSortable(true); table.addColumn(user, new TextFilterableHeader("Modified by", ResourceFilterFields.MODIFIED_BY.getName())); return new ResourcesComparator(1); } private static class AttributesColumn extends TextColumn<Resource> { @Override public String getValue(Resource resource) { int count = 0; String value = null; for (ResourceProperty property : resource.getProperties().values()) { if (property.isVisible()) { if (count == 0) { value = property.getName() + " = " + property.getValue(); } else { value = value + ", " + property.getName() + " = " + property.getValue(); } count++; } } return value; } @Override public void render(Context context, Resource resource, SafeHtmlBuilder sb) { // Value can be null, so do a null check.. if (resource == null) { return; } sb.appendHtmlConstant("<code>" + getValue(resource) + "</code>"); } } }