eu.geclipse.aws.s3.ui.wizards.CreateBucketWizardPage.java Source code

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Here is the source code for eu.geclipse.aws.s3.ui.wizards.CreateBucketWizardPage.java

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/*****************************************************************************
 * Copyright (c) 2008 g-Eclipse Consortium 
 * 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
 *
 * Initial development of the original code was made for the
 * g-Eclipse project founded by European Union
 * project number: FP6-IST-034327  http://www.geclipse.eu/
 *
 * Contributors:
 *    Moritz Post - initial API and implementation
 *****************************************************************************/

package eu.geclipse.aws.s3.ui.wizards;

import java.net.URL;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.jets3t.service.model.S3Bucket;

import eu.geclipse.aws.s3.ui.internal.Activator;

/**
 * A Wizard page to query for details on a new bucket.
 * 
 * @author Moritz Post
 */
public class CreateBucketWizardPage extends WizardPage {

    /** The id of this wizard page. */
    private static final String WIZARD_PAGE_ID = "eu.geclipse.aws.s3.ui.wizards.createBucketWizardPage"; //$NON-NLS-1$

    /** The {@link Text} widget containing the name of the bucket. */
    private Text textName;

    /** A {@link Combo} to display the available locations of a S3 bucket. */
    private Combo comboLocation;

    /**
     * Creates a new S3 bucket wizard page.
     */
    protected CreateBucketWizardPage() {
        super(CreateBucketWizardPage.WIZARD_PAGE_ID, Messages.getString("CreateBucketWizardPage.page_title"), null); //$NON-NLS-1$
        setDescription(Messages.getString("CreateBucketWizardPage.page_description")); //$NON-NLS-1$
        URL imgUrl = Activator.getDefault().getBundle().getEntry("icons/wizban/service_wiz.gif"); //$NON-NLS-1$
        setImageDescriptor(ImageDescriptor.createFromURL(imgUrl));

        setPageComplete(false);
    }

    public void createControl(final Composite parent) {
        Composite mainComp = new Composite(parent, SWT.NONE);
        mainComp.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
        mainComp.setLayout(new GridLayout(1, true));

        Group group = new Group(mainComp, SWT.NONE);
        group.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
        group.setLayout(new GridLayout(3, false));
        group.setText(Messages.getString("CreateBucketWizardPage.groupBucketDetails_title")); //$NON-NLS-1$

        // name
        Label labelName = new Label(group, SWT.NONE);
        labelName.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));
        labelName.setText(Messages.getString("CreateBucketWizardPage.labelBucketName_text")); //$NON-NLS-1$

        this.textName = new Text(group, SWT.SINGLE | SWT.LEAD | SWT.BORDER);
        this.textName.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 0));
        this.textName.addModifyListener(new ModifyListener() {

            public void modifyText(final ModifyEvent e) {
                validatePage();
            }

        });

        // location
        Label labelLocation = new Label(group, SWT.NONE);
        labelName.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));
        labelLocation.setText(Messages.getString("CreateBucketWizardPage.labelBucketLocation_text")); //$NON-NLS-1$

        this.comboLocation = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY);
        this.comboLocation.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 0));
        this.comboLocation.add(Messages.getString("CreateBucketWizardPage.locationEU_text")); //$NON-NLS-1$
        this.comboLocation.add(Messages.getString("CreateBucketWizardPage.locationUS_text")); //$NON-NLS-1$

        this.comboLocation.select(0);

        setControl(group);
    }

    /**
     * Validates the fields in the wizard pages form.
     * 
     * @return <code>true</code> if the forms entries are valid or
     *         <code>false</code> otherwise.
     */
    private boolean validatePage() {
        String error = null;

        if (this.textName.getText().trim().length() == 0) {
            error = Messages.getString("CreateBucketWizardPage.errorBucketNameRequired_text"); //$NON-NLS-1$
        }

        if (error != null) {
            setErrorMessage(error);
            setPageComplete(false);
            return false;
        }
        setErrorMessage(null);
        setPageComplete(true);
        return true;
    }

    /**
     * Gets the text for the bucket name given by the user.
     * 
     * @return the new bucket name
     */
    public String getBucketName() {
        return this.textName.getText();
    }

    /**
     * Gets the text for the bucket location. The returned String is derived from
     * {@link S3Bucket} and can either be:
     * <ol>
     * <li> {@link S3Bucket#LOCATION_EUROPE}</li>
     * <li> {@link S3Bucket#LOCATION_US}</li>
     * </ol>
     * 
     * @return the new bucket location or <code>null</code> if an error occurred
     */
    public String getLocation() {
        int selectionIndex = this.comboLocation.getSelectionIndex();

        switch (selectionIndex) {
        case 0:
            return S3Bucket.LOCATION_EUROPE;
        case 1:
            return S3Bucket.LOCATION_US;
        default:
            return null;
        }
    }
}