ServerInfoSelectionDialog.java

package org.eclipse.emf.emfstore.client.ui.dialogs.login;

import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider;
import org.eclipse.emf.emfstore.client.model.ServerInfo;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;

public class ServerInfoSelectionDialog extends TitleAreaDialog {

	private final java.util.List<ServerInfo> servers;
	private ServerInfo result;
	private ListViewer listViewer;
	private ServerInfoLabelProvider labelProvider;

	/**
	 * Create the dialog.
	 * 
	 * @param parentShell
	 */
	public ServerInfoSelectionDialog(Shell parentShell, java.util.List<ServerInfo> servers) {
		super(parentShell);
		this.servers = servers;
		this.result = null;
	}

	/**
	 * Create contents of the dialog.
	 * 
	 * @param parent
	 */
	@Override
	protected Control createDialogArea(Composite parent) {
		setMessage("In order to execute your requested operation, you have to select a server.");
		setTitle("Please select a Server");
		Composite area = (Composite) super.createDialogArea(parent);
		Composite container = new Composite(area, SWT.NONE);
		container.setLayout(new GridLayout(1, false));
		container.setLayoutData(new GridData(GridData.FILL_BOTH));

		listViewer = new ListViewer(container, SWT.BORDER | SWT.V_SCROLL);
		List list = listViewer.getList();
		list.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
		listViewer.setContentProvider(ArrayContentProvider.getInstance());
		labelProvider = new ServerInfoLabelProvider();
		listViewer.setLabelProvider(labelProvider);
		listViewer.setInput(servers);
		if (servers.size() == 1) {
			listViewer.setSelection(new StructuredSelection(servers.get(0)));
		}
		return area;
	}

	@Override
	protected void okPressed() {
		ISelection selection = listViewer.getSelection();
		if (selection instanceof IStructuredSelection
			&& ((IStructuredSelection) selection).getFirstElement() instanceof ServerInfo) {
			result = (ServerInfo) ((IStructuredSelection) selection).getFirstElement();
		}
		super.okPressed();
	}

	public ServerInfo getResult() {
		return result;
	}

	@Override
	public boolean close() {
		labelProvider.dispose();
		return super.close();
	}

	/**
	 * Create contents of the button bar.
	 * 
	 * @param parent
	 */
	@Override
	protected void createButtonsForButtonBar(Composite parent) {
		createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
		createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
	}

	/**
	 * Return the initial size of the dialog.
	 */
	@Override
	protected Point getInitialSize() {
		return new Point(355, 403);
	}

	private class ServerInfoLabelProvider extends AdapterFactoryLabelProvider {

		public ServerInfoLabelProvider() {
			super(new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE));
		}

		@Override
		public String getColumnText(Object object, int columnIndex) {
			String text = super.getColumnText(object, columnIndex);
			if (object instanceof ServerInfo) {
				ServerInfo server = (ServerInfo) object;
				text += " [" + server.getUrl() + " : " + server.getPort() + "]";
			}
			return text;
		}
	}

}