org.openscada.sec.ui.providers.internal.LabelProviderImpl.java Source code

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

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/*
 * This file is part of the openSCADA project
 * 
 * Copyright (C) 2013 Jens Reimann (ctron@dentrassi.de)
 *
 * openSCADA is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * openSCADA is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with openSCADA. If not, see
 * <http://opensource.org/licenses/lgpl-3.0.html> for a copy of the LGPLv3 License.
 */

package org.openscada.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.swt.graphics.Image;
import org.openscada.sec.ui.providers.KeyProvider;
import org.openscada.sec.ui.providers.KeyProviderFactory;
import org.openscada.sec.ui.providers.Locked;
import org.openscada.ui.databinding.ListeningStyledCellLabelProvider;

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.openscada.sec.ui.providers.Key) {
            final org.openscada.sec.ui.providers.Key key = (org.openscada.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.openscada.sec.ui.providers.Key) {
            listenTo(next, BeanProperties.value(org.openscada.sec.ui.providers.Key.class, Locked.PROP_LOCKED));
        }
    }

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

}