org.eclipse.nebula.widgets.nattable.examples/src/org/eclipse/nebula/widgets/nattable/examples/examples/_100_Layers/_101_Header/RowHeaderViewportSelectionDataLayerExample.java

/*******************************************************************************
 * Copyright (c) 2012, 2020 Original authors and others.
 *
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Original authors and others - initial API and implementation
 ******************************************************************************/
package org.eclipse.nebula.widgets.nattable.examples.examples._100_Layers._101_Header;

import org.eclipse.nebula.widgets.nattable.NatTable;
import org.eclipse.nebula.widgets.nattable.examples.AbstractNatExample;
import org.eclipse.nebula.widgets.nattable.examples.runner.StandaloneNatExampleRunner;
import org.eclipse.nebula.widgets.nattable.grid.GridRegion;
import org.eclipse.nebula.widgets.nattable.grid.data.DefaultRowHeaderDataProvider;
import org.eclipse.nebula.widgets.nattable.grid.data.DummyBodyDataProvider;
import org.eclipse.nebula.widgets.nattable.grid.layer.RowHeaderLayer;
import org.eclipse.nebula.widgets.nattable.layer.CompositeLayer;
import org.eclipse.nebula.widgets.nattable.layer.DataLayer;
import org.eclipse.nebula.widgets.nattable.layer.ILayer;
import org.eclipse.nebula.widgets.nattable.selection.SelectionLayer;
import org.eclipse.nebula.widgets.nattable.viewport.ViewportLayer;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;

public class RowHeaderViewportSelectionDataLayerExample extends
        AbstractNatExample {

    public static void main(String[] args) throws Exception {
        StandaloneNatExampleRunner
                .run(new RowHeaderViewportSelectionDataLayerExample());
    }

    @Override
    public String getDescription() {
        return "This example shows a very large (1 million columns x 1 million rows) data layer with a row header attached.";
    }

    @Override
    public Control createExampleControl(Composite parent) {
        DummyBodyDataProvider bodyDataProvider = new DummyBodyDataProvider(
                1000000, 1000000);
        SelectionLayer selectionLayer = new SelectionLayer(new DataLayer(
                bodyDataProvider));
        ViewportLayer viewportLayer = new ViewportLayer(selectionLayer);

        DataLayer rowHeaderDataLayer = new DataLayer(
                new DefaultRowHeaderDataProvider(bodyDataProvider));
        rowHeaderDataLayer.setDefaultColumnWidth(41);
        ILayer rowHeaderLayer = new RowHeaderLayer(rowHeaderDataLayer,
                viewportLayer, selectionLayer);

        CompositeLayer compositeLayer = new CompositeLayer(2, 1);
        compositeLayer.setChildLayer(GridRegion.ROW_HEADER, rowHeaderLayer, 0,
                0);
        compositeLayer.setChildLayer(GridRegion.BODY, viewportLayer, 1, 0);

        return new NatTable(parent, compositeLayer);
    }

}