org.kalypso.contribs.eclipse.jface.viewers.ColumnViewerUtil.java Source code

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Here is the source code for org.kalypso.contribs.eclipse.jface.viewers.ColumnViewerUtil.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 * 
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 * 
 *  and
 * 
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 * 
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 * 
 *  This library 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 for more details.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Contact:
 * 
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 * 
 *  ---------------------------------------------------------------------------*/
package org.kalypso.contribs.eclipse.jface.viewers;

import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.TreeViewerColumn;
import org.eclipse.jface.viewers.ViewerColumn;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TreeColumn;
import org.kalypso.contribs.eclipse.jface.viewers.table.ColumnsResizeControlListener;

/**
 * Utilities for {@link org.eclipse.jface.viewers.ColumnViewer}'s.
 * 
 * @author Gernot Belger
 */
public final class ColumnViewerUtil {
    private ColumnViewerUtil() {
        throw new UnsupportedOperationException("Helper class, do not instantiate");
    }

    public static Item[] getSisterItems(final Item item) {
        if (item instanceof TableColumn)
            return ((TableColumn) item).getParent().getColumns();

        if (item instanceof TreeColumn)
            return ((TreeColumn) item).getParent().getColumns();

        throw new IllegalArgumentException(
                String.format("Unknown item type for sorting %s", item.getClass().getName()));
    }

    public static Item itemForColumn(final ViewerColumn column) {
        if (column instanceof TableViewerColumn)
            return ((TableViewerColumn) column).getColumn();

        if (column instanceof TreeViewerColumn)
            return ((TreeViewerColumn) column).getColumn();

        throw new IllegalArgumentException(String.format("Unknown column type %s", column.getClass()));
    }

    public static void packColumns(final TableViewer viewer) {
        final TableColumn[] columns = viewer.getTable().getColumns();
        for (final TableColumn column : columns)
            column.pack();
    }

    public static void packColumns(final TreeViewer viewer) {
        final TreeColumn[] columns = viewer.getTree().getColumns();
        for (final TreeColumn column : columns)
            column.pack();
    }

    public static ViewerColumn createViewerColumn(final ColumnViewer viewer, final int style) {
        if (viewer instanceof TreeViewer)
            return new TreeViewerColumn((TreeViewer) viewer, style);
        if (viewer instanceof TableViewer)
            return new TableViewerColumn((TableViewer) viewer, style);

        throw new IllegalArgumentException();
    }

    public static ViewerColumn createEmptyColumn(final ColumnViewer viewer) {
        final ViewerColumn nullColumn = createViewerColumn(viewer, SWT.NONE);
        final ViewerColumnItem nullItem = new ViewerColumnItem(nullColumn);

        nullItem.setResizable(false);
        nullItem.setMoveable(false);
        nullItem.setWidth(0);

        final Item column = nullItem.getColumn();
        ColumnsResizeControlListener.setWidthInfo(column, 0, false);

        /* Empty label provider, else jface whines */
        nullColumn.setLabelProvider(new ColumnLabelProvider());

        return nullColumn;
    }
}