org.eclipse.scada.da.ui.widgets.realtime.ItemCellLabelProvider.java Source code

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Here is the source code for org.eclipse.scada.da.ui.widgets.realtime.ItemCellLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2010, 2014 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
 *     IBH SYSTEMS GmbH - add timestamp column
 *******************************************************************************/
package org.eclipse.scada.da.ui.widgets.realtime;

import java.util.Calendar;
import java.util.TimeZone;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.jface.viewers.CellLabelProvider;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.scada.ui.localization.Activator;

import com.ibm.icu.text.DateFormat;
import com.ibm.icu.text.SimpleDateFormat;

public class ItemCellLabelProvider extends CellLabelProvider {
    private static DateFormat TIMESTAMP_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS"); //$NON-NLS-1$

    private final ResourceManager resourceManager = new LocalResourceManager(JFaceResources.getResources());

    @Override
    public void update(final ViewerCell cell) {
        final Object o = cell.getElement();
        if (o instanceof ListEntry) {
            updateListEntry((ListEntry) o, cell);
        } else if (o instanceof AttributePair) {
            updateAttributePair((AttributePair) o, cell);
        }
    }

    private void updateAttributePair(final AttributePair attributePair, final ViewerCell cell) {
        switch (cell.getColumnIndex()) {
        case 0:
            cell.setText(attributePair.key);
            break;
        case 2:
            if (attributePair.value != null) {
                cell.setText(attributePair.value.getType().name());
            }
            break;
        case 3:
            if (attributePair.value != null) {
                cell.setText(attributePair.value.asString("<null>")); //$NON-NLS-1$
            }
            break;
        default:
            break;
        }
    }

    private void updateListEntry(final ListEntry listEntry, final ViewerCell cell) {
        cell.setFont(listEntry.getFont());
        cell.setForeground(listEntry.getForeground());
        cell.setBackground(listEntry.getBackground());

        switch (cell.getColumnIndex()) {
        case 0:
            cell.setImage(listEntry.getImage());
            cell.setText(listEntry.getDataItem().getItem().getId());
            break;
        case 1:
            if (listEntry.getSubscriptionError() != null) {
                cell.setText(String.format("%s (%s)", listEntry.getSubscriptionState(), //$NON-NLS-1$
                        listEntry.getSubscriptionError().getMessage()));
            } else {
                cell.setText(listEntry.getSubscriptionState().name());
            }
            break;
        case 2:
            if (listEntry.getValue() != null) {
                cell.setText(listEntry.getValue().getType().name());
            }
            break;
        case 3:
            if (listEntry.getValue() != null) {
                cell.setText(listEntry.getValue().asString("<null>")); //$NON-NLS-1$
            }
            break;
        case 4:
            if (listEntry.getItemValue() != null) {
                final Calendar timestamp = listEntry.getItemValue().getTimestamp();
                if (timestamp != null) {
                    cell.setText(formatTimestamp(timestamp));
                } else {
                    cell.setText(null);
                }
            }
            break;
        default:
            break;
        }
    }

    private String formatTimestamp(final Calendar timestamp) {
        if (timestamp == null) {
            return null;
        }

        final Calendar c = (Calendar) timestamp.clone();
        final TimeZone tz = Activator.getTimeZone();
        if (tz != null) {
            c.setTimeZone(tz);
        }

        return TIMESTAMP_DATE_FORMAT.format(c.getTime());
    }

    @Override
    public void dispose() {
        this.resourceManager.dispose();
        super.dispose();
    }

}