com.ebmwebsourcing.petals.common.internal.provisional.swt.ListWithButtonComposite.java Source code

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Here is the source code for com.ebmwebsourcing.petals.common.internal.provisional.swt.ListWithButtonComposite.java

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/******************************************************************************
 * Copyright (c) 2011-2013, Linagora
 *
 * 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:
 *       Linagora - initial API and implementation
 *******************************************************************************/

package com.ebmwebsourcing.petals.common.internal.provisional.swt;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Table;

/**
 * A composite with a single text field and a button.
 * @author Vincent Zurczak - EBM WebSourcing
 */
public class ListWithButtonComposite extends Composite {

    private final Button addButton, removeButton;
    private final TableViewer viewer;
    private final List<Listener> modificationListeners = new ArrayList<Listener>();

    /**
     * Constructor.
     * <p>
     * The list and the button are created, but no property or layout data is set.
     * </p>
     *
     * @param parent the parent
     */
    public ListWithButtonComposite(Composite parent) {

        super(parent, SWT.NONE);
        GridLayout layout = new GridLayout(2, false);
        layout.marginWidth = layout.marginHeight = 0;
        setLayout(layout);

        Table table = new Table(this, SWT.MULTI | SWT.BORDER);
        table.setLayoutData(new GridData(GridData.FILL_BOTH));

        this.viewer = new TableViewer(table);
        this.viewer.setContentProvider(new ArrayContentProvider());
        this.viewer.setLabelProvider(new LabelProvider() {
            @Override
            public String getText(Object element) {
                if (element instanceof File)
                    return ((File) element).getAbsolutePath();
                return super.getText(element);
            }
        });

        Composite buttons = new Composite(this, SWT.NONE);
        layout = new GridLayout();
        layout.marginWidth = layout.marginHeight = 0;
        buttons.setLayout(layout);
        buttons.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING));

        // ADD button
        this.addButton = new Button(buttons, SWT.PUSH);
        this.addButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        // REMOVE button
        this.removeButton = new Button(buttons, SWT.PUSH);
        this.removeButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
    }

    /**
     * @return the addButton
     */
    public Button getAddButton() {
        return this.addButton;
    }

    /**
     * @return the removeButton
     */
    public Button getRemoveButton() {
        return this.removeButton;
    }

    /**
     * @return the viewer
     */
    public TableViewer getViewer() {
        return this.viewer;
    }

    /**
     * Adds a modification listener.
     * @param listener a listener
     */
    public void addModificationListener(Listener listener) {
        this.modificationListeners.add(listener);
    }

    /**
     * Removes a modification listener.
     * @param listener a listener
     */
    public void removeModificationListener(Listener listener) {
        this.modificationListeners.remove(listener);
    }

    /**
     * Notifies the listeners that an object was added or removed from the table.
     */
    public void notifyListeners() {

        Event event = new Event();
        event.widget = this.viewer.getTable();

        for (Listener l : this.modificationListeners)
            l.handleEvent(event);
    }
}