org.eclipse.nebula.widgets.nattable.core.test/src/org/eclipse/nebula/widgets/nattable/reorder/ColumnReorderLayerVisibleChangeTest.java

/*******************************************************************************
 * Copyright (c) 2012, 2020 Original authors 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:
 *     Original authors and others - initial API and implementation
 ******************************************************************************/
package org.eclipse.nebula.widgets.nattable.reorder;

import static org.junit.Assert.assertTrue;

import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.eclipse.nebula.widgets.nattable.layer.ILayerListener;
import org.eclipse.nebula.widgets.nattable.layer.event.ILayerEvent;
import org.eclipse.nebula.widgets.nattable.reorder.event.ColumnReorderEvent;
import org.eclipse.nebula.widgets.nattable.test.fixture.layer.BaseDataLayerFixture;
import org.eclipse.swt.graphics.Rectangle;
import org.junit.Test;

public class ColumnReorderLayerVisibleChangeTest {

    @Test
    /**
     * 	Index		10	11	12	13 ... 20
     *          --------------------
     *  Position 	0 	1	2	3 ... 20
     */
    public void returnsCorrectPositionRectangleForMultiColumnReorderLeftCase() {
        ColumnReorderLayer reorderLayer = new ColumnReorderLayer(
                new BaseDataLayerFixture(20, 20));

        // Build expected cell positions to redraw
        final Set<Rectangle> expectedPositions = new HashSet<Rectangle>();
        expectedPositions.add(new Rectangle(0, 0, 20, 20));

        reorderLayer.addLayerListener(new ILayerListener() {
            @Override
            public void handleLayerEvent(ILayerEvent event) {
                ColumnReorderEvent multiReorder = (ColumnReorderEvent) event;
                assertTrue(multiReorder.getChangedPositionRectangles()
                        .containsAll(expectedPositions));
            }
        });

        // Reorder to beginning of grid
        List<Integer> fromColumnPositions = Arrays.asList(new Integer[] { 10,
                11, 12, 13 });
        reorderLayer.reorderMultipleColumnPositions(fromColumnPositions, 0);

        // Reorder to middle of grid
        expectedPositions.clear();
        expectedPositions.add(new Rectangle(10, 0, 10, 20));
        fromColumnPositions = Arrays.asList(new Integer[] { 19, 18, 17, 16 });
        reorderLayer.reorderMultipleColumnPositions(fromColumnPositions, 10);

        // Reorder to end of grid
        expectedPositions.clear();
        expectedPositions.add(new Rectangle(5, 0, 15, 20));
        fromColumnPositions = Arrays.asList(new Integer[] { 5, 6, 7, 8 });
        reorderLayer.reorderMultipleColumnPositions(fromColumnPositions, 10);
    }

    @Test
    /**
     * 	Index		2	3	0	1 ... 20
     *          --------------------
     *  Position 	0 	1	2	3 ... 20
     */
    public void returnsCorrectPositionRectangleForMultiColumnReorderRightCase() {
        ColumnReorderLayer reorderLayer = new ColumnReorderLayer(
                new BaseDataLayerFixture(20, 20));

        // Build expected cell positions to redraw
        final Set<Rectangle> expectedPositions = new HashSet<Rectangle>();
        expectedPositions.add(new Rectangle(0, 0, 20, 20));

        reorderLayer.addLayerListener(new ILayerListener() {
            @Override
            public void handleLayerEvent(ILayerEvent event) {
                ColumnReorderEvent multiReorder = (ColumnReorderEvent) event;
                assertTrue(multiReorder.getChangedPositionRectangles()
                        .containsAll(expectedPositions));
            }
        });

        // Reorder from beginning of grid
        List<Integer> fromColumnPositions = Arrays
                .asList(new Integer[] { 0, 1 });
        reorderLayer.reorderMultipleColumnPositions(fromColumnPositions, 2);

        // Reorder to middle of grid
        expectedPositions.clear();
        expectedPositions.add(new Rectangle(5, 0, 15, 20));
        fromColumnPositions = Arrays.asList(new Integer[] { 5, 6, 7, 8 });
        reorderLayer.reorderMultipleColumnPositions(fromColumnPositions, 10);

        // Reorder to end of grid
        expectedPositions.clear();
        expectedPositions.add(new Rectangle(10, 0, 10, 20));
        fromColumnPositions = Arrays.asList(new Integer[] { 10, 11, 12, 13 });
        reorderLayer.reorderMultipleColumnPositions(fromColumnPositions, 19);
    }

}