org.eclipse.emf.compare.ui2.input.SelectAncestorDialog.java Source code

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Here is the source code for org.eclipse.emf.compare.ui2.input.SelectAncestorDialog.java

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/*******************************************************************************
 * Copyright (c) 2000, 2012 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *     Obeo - Tweaking for EMF Compare
 *******************************************************************************/

package org.eclipse.emf.compare.ui2.input;

import org.eclipse.core.resources.IResource;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;

/**
 * <p>
 * A personalized MessageDialog on which in case of three-way compare, this class asks the user which resource
 * to use as the ancestor. This class is retrieved from ResourceCompare.class
 * </p>
 * 
 * @see org.eclipse.compare.internal.SelectAncestorDialog
 * @author <a href="mailto:maher.bouanani@obeo.fr">Bouanani Maher</a>
 */
public class SelectAncestorDialog extends MessageDialog {

    /**
     * List of selected resources.
     */
    private IResource[] theResources;

    /**
     * The ancestor resources.
     */
    private IResource ancestorResource;

    /**
     * The left resources.
     */
    private IResource leftResource;

    /**
     * The right resources.
     */
    private IResource rightResource;

    /**
     * lists of buttons.
     */
    private Button[] buttons;

    /**
     * A listener to detect the chosen action.
     */
    private SelectionListener selectionListener = new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            Button selectedButton = (Button) e.widget;
            if (!selectedButton.getSelection()) {
                return;
            }
            for (int i = 0; i < 3; i++) {
                if (selectedButton == buttons[i]) {
                    pickAncestor(i);
                }
            }
        }
    };

    /**
     * A message dialog that permit the user to select the Ancestor.
     * 
     * @param parentShell
     *            Workbench window's shell.
     * @param theResources
     *            list of the selected resources
     */

    @SuppressWarnings("restriction")
    public SelectAncestorDialog(Shell parentShell, IResource[] theResources) {
        super(parentShell, "Select Common Ancestor", null,
                "Which resource would you like to use as the common ancestor in the three-way compare?",
                MessageDialog.QUESTION, new String[] { IDialogConstants.OK_LABEL, IDialogConstants.CANCEL_LABEL, },
                0);
        this.theResources = theResources;
    }

    @Override
    @SuppressWarnings("restriction")
    protected Control createCustomArea(Composite parent) {
        Composite composite = new Composite(parent, SWT.NONE);
        composite.setLayout(new GridLayout());
        buttons = new Button[3];
        for (int i = 0; i < 3; i++) {
            buttons[i] = new Button(composite, SWT.RADIO);
            buttons[i].addSelectionListener(selectionListener);
            buttons[i].setText(NLS.bind("''{0}''", theResources[i].getFullPath().toPortableString()));
            buttons[i].setFont(parent.getFont());
            // set initial state
            buttons[i].setSelection(i == 0);
        }
        pickAncestor(0);
        return composite;
    }

    /**
     * Pick the ancestor.
     * 
     * @param index
     *            reference of the selected Notifier in the list
     */
    private void pickAncestor(int index) {
        ancestorResource = theResources[index];
        if (index == 0) {
            leftResource = theResources[1];
        } else {
            leftResource = theResources[0];
        }
        if (index == 2) {
            rightResource = theResources[1];
        } else {
            rightResource = theResources[2];
        }
    }

    public IResource getAncestorResource() {
        return ancestorResource;
    }

    public void setAncestorResource(IResource ancestorResource) {
        this.ancestorResource = ancestorResource;
    }

    public IResource getLeftResource() {
        return leftResource;
    }

    public void setLeftResource(IResource leftResource) {
        this.leftResource = leftResource;
    }

    public IResource getRightResource() {
        return rightResource;
    }

    public void setRightResource(IResource rightResource) {
        this.rightResource = rightResource;
    }

}