Java tutorial
/**************************************************************************** * Copyright (c) 2004 Composent, Inc. and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Composent, Inc. - initial API and implementation *****************************************************************************/ package org.eclipse.ecf.internal.presence.ui.dialogs; import java.util.*; import org.eclipse.core.runtime.*; import org.eclipse.core.runtime.jobs.Job; import org.eclipse.ecf.core.ContainerCreateException; import org.eclipse.ecf.core.identity.ID; import org.eclipse.ecf.internal.presence.ui.Messages; import org.eclipse.ecf.presence.chatroom.*; import org.eclipse.ecf.presence.ui.MultiRosterAccount; import org.eclipse.ecf.ui.SharedImages; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.viewers.*; import org.eclipse.jface.viewers.deferred.DeferredContentProvider; import org.eclipse.jface.viewers.deferred.SetModel; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.*; public class ChatRoomSelectionDialog extends TitleAreaDialog { private static final int X_INITIAL_SIZE = 640; private static final int Y_INITIAL_SIZE = 400; private Room loadingRoom = new Room(); MultiRosterAccount[] accounts = null; private Room selectedRoom = null; private Job roomRetrieveJob = null; public class Room { IChatRoomInfo info; MultiRosterAccount account; public Room() { this.info = new IChatRoomInfo() { /** * @throws ContainerCreateException */ public IChatRoomContainer createChatRoomContainer() throws ContainerCreateException { return null; } public ID getConnectedID() { return null; } public String getDescription() { return null; } public String getName() { return "Retrieving chat room list from servers..."; //$NON-NLS-1$ } public int getParticipantsCount() { return 0; } public ID getRoomID() { return null; } public String getSubject() { return null; } public boolean isModerated() { return false; } public boolean isPersistent() { return false; } public boolean requiresPassword() { return false; } public Object getAdapter(Class adapter) { return null; } }; } public Room(IChatRoomInfo info, MultiRosterAccount man) { this.info = info; this.account = man; } public IChatRoomInfo getRoomInfo() { return info; } public MultiRosterAccount getAccount() { return account; } } private SetModel rooms = new SetModel(); public ChatRoomSelectionDialog(Shell parentShell, MultiRosterAccount[] accounts) { super(parentShell); this.accounts = accounts; setTitleImage(SharedImages.getImage(SharedImages.IMG_CHAT_WIZARD)); } protected boolean isResizable() { return true; } protected Point getInitialSize() { return getShell().computeSize(X_INITIAL_SIZE, Y_INITIAL_SIZE, true); } protected Control createDialogArea(Composite parent) { Composite main = new Composite(parent, SWT.NONE); main.setLayout(new GridLayout()); main.setLayoutData(new GridData(GridData.FILL_BOTH)); TableViewer viewer = new TableViewer(main, SWT.VIRTUAL | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION); Table table = viewer.getTable(); table.setHeaderVisible(true); table.setLinesVisible(true); table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); TableColumn tc = new TableColumn(table, SWT.NONE); tc.setText(Messages.ChatRoomSelectionDialog_ROOM_NAME_COLUMN); // tc.pack(); // int width = tc.getWidth(); tc.setWidth(X_INITIAL_SIZE / 3); tc = new TableColumn(table, SWT.NONE); tc.setText(Messages.ChatRoomSelectionDialog_SUBJECT_COLUMN); tc.pack(); int width; width = tc.getWidth(); tc.setWidth(width + (width / 4)); tc = new TableColumn(table, SWT.NONE); tc.setText(Messages.ChatRoomSelectionDialog_DESCRIPTION_COLUMN); tc.pack(); width = tc.getWidth(); tc.setWidth(width + (width / 4)); tc = new TableColumn(table, SWT.NONE); tc.setText(Messages.ChatRoomSelectionDialog_MEMBERS_COLUMN); tc.pack(); tc = new TableColumn(table, SWT.NONE); tc.setText(Messages.ChatRoomSelectionDialog_MODERATED_COLUMN); tc.pack(); tc = new TableColumn(table, SWT.NONE); tc.setText(Messages.ChatRoomSelectionDialog_PERSISTENT_COLUMN); tc.pack(); tc = new TableColumn(table, SWT.NONE); tc.setText(Messages.ChatRoomSelectionDialog_ACCOUNT_COLUMN); tc.pack(); viewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { ISelection selection = event.getSelection(); IStructuredSelection ss = (IStructuredSelection) ((selection instanceof IStructuredSelection) ? selection : null); Object firstElement = (ss == null) ? null : ss.getFirstElement(); if (!event.getSelection().isEmpty() && !loadingRoom.equals(firstElement)) { ChatRoomSelectionDialog.this.getButton(Window.OK).setEnabled(true); } } }); viewer.setContentProvider(new DeferredContentProvider(new Comparator() { public int compare(Object r1, Object r2) { Room room1 = (Room) r1; Room room2 = (Room) r2; return room1.getRoomInfo().getName().compareTo(room2.getRoomInfo().getName()); } })); viewer.setLabelProvider(new ChatRoomLabelProvider()); rooms.addAll(Arrays.asList(new Room[] { loadingRoom })); viewer.setInput(rooms); this.setTitle(Messages.ChatRoomSelectionDialog_TITLE); this.setMessage(Messages.ChatRoomSelectionDialog_MESSAGE); viewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent e) { IStructuredSelection s = (IStructuredSelection) e.getSelection(); Object o = s.getFirstElement(); if (o instanceof Room) { selectedRoom = (Room) o; } } }); viewer.addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(DoubleClickEvent event) { if (selectedRoom != null) { ChatRoomSelectionDialog.this.okPressed(); } } }); startRetrieveJob(); applyDialogFont(parent); return parent; } private void startRetrieveJob() { roomRetrieveJob = new Job("Chat Room Retrieve") { //$NON-NLS-1$ protected IStatus run(IProgressMonitor monitor) { ArrayList add = new ArrayList(); for (int i = 0; i < accounts.length; i++) { IChatRoomManager chatRoomManager = accounts[i].getPresenceContainerAdapter() .getChatRoomManager(); if (chatRoomManager != null) { try { IChatRoomInfo[] infos = chatRoomManager.getChatRoomInfos(); if (infos != null) { for (int j = 0; j < infos.length; j++) { if (infos[j] != null && accounts[i] != null) { add.add(new Room(infos[j], accounts[i])); } } } } catch (Exception e) { // Ignore } } } if (monitor.isCanceled()) return Status.CANCEL_STATUS; rooms.removeAll(new Room[] { loadingRoom }); rooms.addAll(add); return Status.OK_STATUS; } }; roomRetrieveJob.schedule(); } private class ChatRoomLabelProvider implements ITableLabelProvider { public Image getColumnImage(Object element, int columnIndex) { return null; } public String getColumnText(Object element, int columnIndex) { Room room = (Room) element; IChatRoomInfo info = room.getRoomInfo(); MultiRosterAccount account = room.getAccount(); switch (columnIndex) { case 0: return info.getName(); case 1: return info.getSubject(); case 2: return info.getDescription(); case 3: return (account == null) ? null : String.valueOf(info.getParticipantsCount()); case 4: return (account == null) ? null : String.valueOf(info.isModerated()); case 5: return (account == null) ? null : String.valueOf(info.isPersistent()); case 6: return (account == null) ? null : account.getContainer().getConnectedID().getName(); default: return ""; //$NON-NLS-1$ } } public void addListener(ILabelProviderListener listener) { // do nothing } public void dispose() { // do nothing } public boolean isLabelProperty(Object element, String property) { return false; } public void removeListener(ILabelProviderListener listener) { // do nothing } } protected Control createButtonBar(Composite parent) { Control bar = super.createButtonBar(parent); this.getButton(Window.OK).setText(Messages.ChatRoomSelectionDialog_ENTER_CHAT_BUTTON_TEXT); this.getButton(Window.OK).setEnabled(false); return bar; } public Room getSelectedRoom() { return selectedRoom; } public boolean close() { if (roomRetrieveJob != null) { roomRetrieveJob.cancel(); roomRetrieveJob = null; rooms.clear(); } return super.close(); } }