org.csstudio.ui.util.swt.stringtable.StringMultiColumnsLabelProvider.java Source code

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Here is the source code for org.csstudio.ui.util.swt.stringtable.StringMultiColumnsLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2010 Oak Ridge National Laboratory.
 * 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
 ******************************************************************************/
package org.csstudio.ui.util.swt.stringtable;

import java.util.List;

import org.eclipse.jface.viewers.CellLabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.ViewerCell;

/** Label provider that transforms Integer index into corresponding
 * string in table data to display.
 *  @author Xihui Chen
 */
class StringMultiColumnsLabelProvider extends CellLabelProvider {
    private static final long serialVersionUID = 4446281839503966653L;
    final private TableViewer tableViewer;
    final private boolean editable;

    /**
     * @param tableViewer
     * @param editable whether this column is editable
     */
    public StringMultiColumnsLabelProvider(final TableViewer tableViewer, final boolean editable) {
        super();
        this.tableViewer = tableViewer;
        this.editable = editable;
    }

    @SuppressWarnings("unchecked")
    @Override
    public void update(ViewerCell cell) {
        final List<String[]> items = (List<String[]>) tableViewer.getInput();
        final int index = ((Integer) cell.getElement()).intValue();
        //if this is the extra row
        if (index < 0)
            if (editable)
                cell.setText(Messages.StringTableEditor_AddRowText);
            else
                cell.setText(""); //$NON-NLS-1$
        //if not
        else {
            // For multi-line text, only show the first line
            final int column = cell.getColumnIndex();
            String text = "";
            if (column < items.get(index).length)
                text = items.get(index)[column];
            // Not sure whether to look for '\r' or '\n'. Try both
            int nl = text.indexOf('\r');
            if (nl < 0)
                nl = text.indexOf('\n');
            if (nl > 0)
                text = text.substring(0, nl) + "..."; //$NON-NLS-1$
            cell.setText(text);
        }
    }
}