Java tutorial
/***************************************************************** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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.yafra.rcp.admin; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import javax.naming.NamingException; import org.eclipse.core.databinding.observable.list.WritableList; import org.eclipse.jface.databinding.viewers.ObservableListContentProvider; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.ListViewer; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.ScrolledComposite; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.yafra.model.MYafraBusinessRole; import org.yafra.rcp.GlobalSettings; import org.yafra.server.ejbRemote.MHIYafraBusinessRoleRemote; public class YafraUserAddBusRoleDialog extends Dialog { private ListViewer viewerRoles; private List<MGYafraBusRole> roles = new ArrayList<MGYafraBusRole>(); private WritableList inputRoles; private GlobalSettings glob; private List<MGYafraBusRole> selectedroles = new ArrayList<MGYafraBusRole>(); /** * Create the dialog. * @param parentShell */ public YafraUserAddBusRoleDialog(Shell parentShell) { super(parentShell); glob = GlobalSettings.getSingletonObject(); } /** * Create contents of the dialog. * @param parent */ @Override protected Control createDialogArea(Composite parent) { Composite container = (Composite) super.createDialogArea(parent); Label lblAddNewBusRole = new Label(container, SWT.NONE); lblAddNewBusRole.setText("Add new business role - select one or more roles below"); ScrolledComposite scrolledComposite = new ScrolledComposite(container, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL); GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1); gridData.heightHint = 95; scrolledComposite.setLayoutData(gridData); scrolledComposite.setExpandHorizontal(true); scrolledComposite.setExpandVertical(true); fillList(); inputRoles = new WritableList(roles, MGYafraBusRole.class); viewerRoles = new ListViewer(scrolledComposite, SWT.BORDER | SWT.MULTI); viewerRoles.setContentProvider(new ObservableListContentProvider()); viewerRoles.setLabelProvider(new LabelProvider() { public String getText(Object element) { MGYafraBusRole user = (MGYafraBusRole) element; return (user.getName() + " - " + user.getDescription()); } }); viewerRoles.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { if (event.getSelection().isEmpty()) { // if the selection is empty clear list selectedroles.clear(); glob.setDebugmessage(" - selection change is empty"); return; } if (event.getSelection() instanceof IStructuredSelection) { IStructuredSelection selection = (IStructuredSelection) event.getSelection(); glob.setDebugmessage( " - selection on dialog business roles no of selections: " + selection.size()); for (Iterator<MGYafraBusRole> iterator = selection.iterator(); iterator.hasNext();) { selectedroles.add(iterator.next()); } } } }); viewerRoles.setInput(inputRoles); scrolledComposite.setContent(viewerRoles.getList()); scrolledComposite.setMinSize(viewerRoles.getList().computeSize(SWT.DEFAULT, SWT.DEFAULT)); return container; } /** * Create contents of the button bar. * @param parent */ @Override protected void createButtonsForButtonBar(Composite parent) { Button okbutton = createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true); okbutton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { // check if selection list is empty - if so error message to user to use cancel or to do selection if (selectedroles.isEmpty()) { MessageDialog.openInformation(getShell(), "Information", "You did not select an item"); } } }); createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false); } /** * Return the initial size of the dialog. */ @Override protected Point getInitialSize() { return new Point(602, 375); } public List<MGYafraBusRole> getSelection() { return selectedroles; } private void fillList() { MHIYafraBusinessRoleRemote mhibrole = null; List<MYafraBusinessRole> perslist; roles.clear(); // clear any existing list as this list will be rebuild by every new user selection selectedroles.clear(); try { mhibrole = (MHIYafraBusinessRoleRemote) glob.getEjbcontext().lookup("MHIYafraBusinessRoleRemote"); } catch (NamingException e) { glob.setDebugmessage(" - error with ejb context"); e.printStackTrace(); } perslist = (List<MYafraBusinessRole>) mhibrole.getBusinessRoles(true); Iterator<MYafraBusinessRole> it = perslist.iterator(); while (it.hasNext()) { MYafraBusinessRole dbrole = it.next(); MGYafraBusRole r = new MGYafraBusRole(); r.setName(dbrole.getName()); r.setDescription(dbrole.getDescription()); r.setFlag(dbrole.isFlag()); roles.add(r); } } }