org.kalypso.ogc.gml.table.LayerTablePainter.java Source code

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Here is the source code for org.kalypso.ogc.gml.table.LayerTablePainter.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.ogc.gml.table;

import org.eclipse.jface.resource.ColorRegistry;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.kalypso.contribs.eclipse.swt.ColorUtilities;
import org.kalypsodeegree.model.feature.Feature;

/**
 * @author Gernot Belger
 */
public class LayerTablePainter implements Listener {
    private final LayerTableViewer m_viewer;

    public LayerTablePainter(final LayerTableViewer viewer) {
        m_viewer = viewer;
    }

    @Override
    public void handleEvent(final Event event) {
        switch (event.type) {
        case SWT.EraseItem:
            eraseItem(event);
            return;
        }
    }

    // TODO: draw hover and selected: mix style with hover/selection colors?
    private void eraseItem(final Event event) {
        if ((event.detail & SWT.SELECTED) != 0)
            return; /* item selected */
        if ((event.detail & SWT.HOT) != 0)
            return; /* item selected */

        final GC gc = event.gc;

        final Feature feature = (Feature) event.item.getData();

        final int columnIndex = event.index;

        final LayerTableStyle style = m_viewer.getStyle(columnIndex);
        if (style == null)
            return;

        final java.awt.Color awtColor = style.getBackground(feature);
        if (awtColor == null)
            return;

        // TODO: we should also support fill patterns one day...
        final int alpha = awtColor.getAlpha();
        final Color swtColor = getColor(awtColor);

        final Color oldBackground = gc.getBackground();
        final int oldAlpha = gc.getAlpha();

        gc.setBackground(swtColor);
        gc.setAlpha(alpha);

        gc.fillRectangle(event.x, event.y, event.width, event.height);

        gc.setBackground(oldBackground);
        gc.setAlpha(oldAlpha);

        event.detail &= ~SWT.BACKGROUND; // default cell background should not be drawn
    }

    private Color getColor(final java.awt.Color fillColor) {
        final RGB fillRGB = ColorUtilities.toRGB(fillColor);

        final ColorRegistry colorRegistry = JFaceResources.getColorRegistry();
        final String symbolicName = fillRGB.toString();
        colorRegistry.put(symbolicName, fillRGB);

        return colorRegistry.get(symbolicName);
    }

}