com.siteview.mde.internal.ui.parts.ComboViewerPart.java Source code

Introduction

Here is the source code for com.siteview.mde.internal.ui.parts.ComboViewerPart.java

Source

/*******************************************************************************
 * Copyright (c) 2008 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
 *     Benjamin Cabe <benjamin.cabe@anyware-tech.com> - creation of this class
 *     Code 9 Corporation - ongoing enhancements
 *******************************************************************************/
package com.siteview.mde.internal.ui.parts;

import java.util.*;
import java.util.List;
import org.eclipse.jface.viewers.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.forms.widgets.FormToolkit;

public class ComboViewerPart {
    private Control fCombo;
    private ComboViewer fComboViewer;
    private List fObjects;

    /**
     * The magic object used to deal with null content
     */
    public static Object NULL_OBJECT = new Object();

    public ComboViewerPart() {
    }

    public void createControl(Composite parent, FormToolkit toolkit, int style) {
        if (toolkit.getBorderStyle() == SWT.BORDER) {
            fCombo = new Combo(parent, style | SWT.BORDER);
            fComboViewer = new ComboViewer((Combo) fCombo);
        } else {
            fCombo = new CCombo(parent, style | SWT.FLAT);
            fComboViewer = new ComboViewer((CCombo) fCombo);
        }

        fObjects = new ArrayList();
        fComboViewer.setLabelProvider(new LabelProvider());
        fComboViewer.setContentProvider(ArrayContentProvider.getInstance());
        fComboViewer.setInput(fObjects);
    }

    public Control getControl() {
        return fCombo;
    }

    public void setEnabled(boolean enabled) {
        fCombo.setEnabled(enabled);
    }

    public void refresh() {
        fComboViewer.refresh();
    }

    public void addItem(Object item) {
        fObjects.add((item == null) ? NULL_OBJECT : item);
        refresh();
    }

    public void addItem(Object item, int index) {
        fObjects.add(index, (item == null) ? NULL_OBJECT : item);
        refresh();
    }

    public Collection getItems() {
        return fObjects;
    }

    public void setItems(Object[] items) {
        fObjects.clear();
        for (int i = 0; i < items.length; i++)
            fObjects.add((items[i] == null) ? NULL_OBJECT : items[i]);
        refresh();
    }

    public void setItems(Collection items) {
        fObjects.clear();
        Iterator it = items.iterator();
        while (it.hasNext()) {
            Object o = it.next();
            fObjects.add((o == null) ? NULL_OBJECT : o);
        }
        refresh();
    }

    public void select(Object item) {
        if (item != null)
            fComboViewer.setSelection(new StructuredSelection(item));
        else
            fComboViewer.setSelection(null);
    }

    public void select(int index) {
        if (index < fObjects.size())
            select(fObjects.get(index));
    }

    public void setLabelProvider(IBaseLabelProvider labelProvider) {
        fComboViewer.setLabelProvider(labelProvider);
    }

    public void setComparator(ViewerComparator comparator) {
        fComboViewer.setComparator(comparator);
    }

    public void addSelectionChangedListener(ISelectionChangedListener listener) {
        fComboViewer.addSelectionChangedListener(listener);
    }

    public Object getSelection() {
        return ((IStructuredSelection) fComboViewer.getSelection()).getFirstElement();
    }
}