Java tutorial
/** This package is part of the application VIF. Copyright (C) 2011-2014, Benno Luthiger 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 2 of the License, or (at your option) 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package org.hip.vif.admin.groupedit.ui; import org.hip.vif.admin.groupedit.Activator; import org.hip.vif.admin.groupedit.data.GroupContainer; import org.hip.vif.admin.groupedit.data.GroupWrapper; import org.hip.vif.admin.groupedit.tasks.GroupShowListTask; import org.hip.vif.web.util.VIFViewHelper; import org.ripla.interfaces.IMessages; import org.ripla.web.util.RiplaViewHelper; import com.vaadin.data.Container.Filter; import com.vaadin.data.Item; import com.vaadin.data.Property; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.data.Property.ValueChangeListener; import com.vaadin.shared.ui.label.ContentMode; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.CheckBox; import com.vaadin.ui.CustomComponent; import com.vaadin.ui.Label; import com.vaadin.ui.Notification; import com.vaadin.ui.Notification.Type; import com.vaadin.ui.Table; import com.vaadin.ui.VerticalLayout; /** View to display a list of discussion groups. * * @author Luthiger Created: 06.11.2011 */ @SuppressWarnings("serial") public class GroupListView extends CustomComponent { private static final int TABLE_SIZE = 14; private boolean confirmationMode; /** Constructor * * @param inGroups {@link GroupContainer} the groups to display * @param inTask {@link GroupShowTask} the controller */ public GroupListView(final GroupContainer inGroups, final GroupShowListTask inTask) { confirmationMode = false; final VerticalLayout lLayout = new VerticalLayout(); setCompositionRoot(lLayout); final IMessages lMessages = Activator.getMessages(); lLayout.setStyleName("vif-table"); //$NON-NLS-1$ lLayout.addComponent(new Label(String.format(VIFViewHelper.TMPL_TITLE, "vif-pagetitle", //$NON-NLS-1$ lMessages.getMessage("ui.group.list.view.title.page")), ContentMode.HTML)); //$NON-NLS-1$ final Label lSubtitle = new Label( String.format(VIFViewHelper.TMPL_WARNING, lMessages.getMessage("ui.group.delete.warning")), //$NON-NLS-1$ ContentMode.HTML); lSubtitle.setVisible(false); lLayout.addComponent(lSubtitle); final Table lTable = new Table(); lTable.setWidth("100%"); //$NON-NLS-1$ lTable.setContainerDataSource(inGroups); lTable.addGeneratedColumn(GroupContainer.GROUP_CHECK, new Table.ColumnGenerator() { @Override public Object generateCell(final Table inSource, final Object inItemId, final Object inColumnId) { return createCheck((GroupWrapper) inItemId); } }); lTable.setPageLength(inGroups.size() > TABLE_SIZE ? TABLE_SIZE : 0); lTable.setColumnCollapsingAllowed(true); lTable.setColumnReorderingAllowed(true); lTable.setSelectable(true); lTable.setImmediate(true); lTable.addValueChangeListener(inTask); lTable.setVisibleColumns(GroupContainer.NATURAL_COL_ORDER); lTable.setColumnHeaders(VIFViewHelper.getColumnHeaders(GroupContainer.COL_HEADERS, lMessages)); lLayout.addComponent(lTable); lLayout.addComponent(RiplaViewHelper.createSpacer()); final Button lDelete = new Button(lMessages.getMessage("ui.group.editor.button.delete")); //$NON-NLS-1$ lDelete.addClickListener(new Button.ClickListener() { @Override public void buttonClick(final ClickEvent inEvent) { if (confirmationMode) { if (!inTask.deleteGroups()) { Notification.show(lMessages.getMessage("errmsg.process.delete"), Type.WARNING_MESSAGE); //$NON-NLS-1$ } } else { if (VIFViewHelper.processAction(inGroups)) { confirmationMode = true; inGroups.addContainerFilter(new SelectedFilter()); lSubtitle.setVisible(true); lTable.setSelectable(false); lTable.setPageLength(0); } } } }); lLayout.addComponent(lDelete); } private CheckBox createCheck(final GroupWrapper inEntry) { final CheckBox out = new CheckBox(); out.setImmediate(true); out.setValue(inEntry.isChecked()); if (inEntry.getIsDeletable()) { out.setEnabled(!confirmationMode); } else { out.setEnabled(false); } out.addValueChangeListener(new ValueChangeListener() { @Override public void valueChange(final ValueChangeEvent inEvent) { inEntry.setChecked(((CheckBox) inEvent.getProperty()).getValue()); } }); return out; } // --- private classes --- private static class SelectedFilter implements Filter { @Override public boolean passesFilter(final Object inItemId, final Item inItem) throws UnsupportedOperationException { final Property<?> lCheckBox = inItem.getItemProperty(GroupContainer.GROUP_CHECKED); return (Boolean) lCheckBox.getValue(); } @Override public boolean appliesToProperty(final Object inPropertyId) { return GroupContainer.GROUP_CHECKED.equals(inPropertyId); } } }