org.eclipse.scada.sec.ui.providers.internal.LabelProviderImpl.java Source code

Introduction

Here is the source code for org.eclipse.scada.sec.ui.providers.internal.LabelProviderImpl.java

Source

/*******************************************************************************
 * Copyright (c) 2013 Jens Reimann 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:
 *     Jens Reimann - initial API and implementation
 *******************************************************************************/
package org.eclipse.scada.sec.ui.providers.internal;

import org.eclipse.core.databinding.beans.BeanProperties;
import org.eclipse.core.databinding.observable.set.IObservableSet;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.scada.sec.ui.providers.KeyProvider;
import org.eclipse.scada.sec.ui.providers.KeyProviderFactory;
import org.eclipse.scada.sec.ui.providers.Locked;
import org.eclipse.scada.ui.databinding.ListeningStyledCellLabelProvider;
import org.eclipse.swt.graphics.Image;

public final class LabelProviderImpl extends ListeningStyledCellLabelProvider {
    private final ResourceManager manager;

    private final Image locked;

    public LabelProviderImpl(final ResourceManager manager, final IObservableSet itemsThatNeedLabels) {
        super(itemsThatNeedLabels);
        this.manager = manager;
        this.locked = this.manager.createImageWithDefault(
                ImageDescriptor.createFromFile(LabelProviderImpl.class, "icons/blocked.gif"));
    }

    @Override
    public void update(final ViewerCell cell) {
        final Object ele = cell.getElement();
        if (ele instanceof KeyProviderFactory) {
            cell.setText(ele.toString());
        } else if (ele instanceof KeyProvider) {
            final KeyProvider keyProvider = (KeyProvider) ele;
            cell.setText(keyProvider.toString());
            cell.setImage(keyProvider.isLocked() ? this.locked : null);
        } else if (ele instanceof org.eclipse.scada.sec.ui.providers.Key) {
            final org.eclipse.scada.sec.ui.providers.Key key = (org.eclipse.scada.sec.ui.providers.Key) ele;
            cell.setText(key.toString());
            cell.setImage(key.isLocked() ? this.locked : null);
        }
    }

    @Override
    protected void addListenerTo(final Object next) {
        if (next instanceof KeyProvider) {
            listenTo(next, BeanProperties.value(KeyProvider.class, Locked.PROP_LOCKED));
        } else if (next instanceof org.eclipse.scada.sec.ui.providers.Key) {
            listenTo(next, BeanProperties.value(org.eclipse.scada.sec.ui.providers.Key.class, Locked.PROP_LOCKED));
        }
    }

    @Override
    protected void removeListenerFrom(final Object element) {
    }

}