org.eclipse.scada.ca.ui.editor.config.ConfigurationCellLabelProvider.java Source code

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Here is the source code for org.eclipse.scada.ca.ui.editor.config.ConfigurationCellLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2012 TH4 SYSTEMS GmbH 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:
 *     TH4 SYSTEMS GmbH - initial API and implementation
 *******************************************************************************/
package org.eclipse.scada.ca.ui.editor.config;

import java.util.Map;
import java.util.Set;

import org.eclipse.core.databinding.observable.map.IMapChangeListener;
import org.eclipse.core.databinding.observable.map.IObservableMap;
import org.eclipse.core.databinding.observable.map.MapChangeEvent;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.jface.viewers.StyledCellLabelProvider;
import org.eclipse.jface.viewers.ViewerCell;

public class ConfigurationCellLabelProvider extends StyledCellLabelProvider {

    private final IMapChangeListener mapChangeListener = new IMapChangeListener() {
        @Override
        public void handleMapChange(final MapChangeEvent event) {
            final Set<?> affectedElements = event.diff.getChangedKeys();
            if (!affectedElements.isEmpty()) {
                final LabelProviderChangedEvent newEvent = new LabelProviderChangedEvent(
                        ConfigurationCellLabelProvider.this, affectedElements.toArray());
                fireLabelProviderChanged(newEvent);
            }
        }
    };

    private final IObservableMap[] attributeMaps;

    public ConfigurationCellLabelProvider(final IObservableMap... attributeMaps) {
        super();

        for (int i = 0; i < attributeMaps.length; i++) {
            attributeMaps[i].addMapChangeListener(this.mapChangeListener);
        }
        this.attributeMaps = attributeMaps;
    }

    @Override
    public void dispose() {
        for (int i = 0; i < this.attributeMaps.length; i++) {
            this.attributeMaps[i].removeMapChangeListener(this.mapChangeListener);
        }
        super.dispose();
    }

    @Override
    public void update(final ViewerCell cell) {
        final Map.Entry<?, ?> cfg = (Map.Entry<?, ?>) cell.getElement();
        switch (cell.getColumnIndex()) {
        case 0:
            cell.setText("" + cfg.getKey());
            break;
        case 1:
            cell.setText("" + cfg.getValue());
            break;
        }
        super.update(cell);
    }
}