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diff --git a/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/NatTableSelectionAdaptor.java b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/NatTableSelectionAdaptor.java
new file mode 100644
index 000000000..4302cdeac
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.nattable/src/org/simantics/browsing/ui/nattable/NatTableSelectionAdaptor.java
@@ -0,0 +1,139 @@
+package org.simantics.browsing.ui.nattable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.jface.viewers.IPostSelectionProvider;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.ISelectionChangedListener;
+import org.eclipse.jface.viewers.ISelectionProvider;
+import org.eclipse.jface.viewers.SelectionChangedEvent;
+import org.eclipse.jface.viewers.StructuredSelection;
+import org.eclipse.nebula.widgets.nattable.NatTable;
+import org.eclipse.nebula.widgets.nattable.coordinate.PositionCoordinate;
+import org.eclipse.nebula.widgets.nattable.layer.ILayerListener;
+import org.eclipse.nebula.widgets.nattable.layer.cell.ILayerCell;
+import org.eclipse.nebula.widgets.nattable.layer.event.ILayerEvent;
+import org.eclipse.nebula.widgets.nattable.selection.SelectionLayer;
+import org.eclipse.nebula.widgets.nattable.selection.event.CellSelectionEvent;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.events.SelectionListener;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.widgets.Event;
+import org.simantics.utils.datastructures.MapList;
+
+public class NatTableSelectionAdaptor implements ISelectionProvider, IPostSelectionProvider, ILayerListener {
+	NatTable natTable;
+	SelectionLayer selectionLayer;
+	GETreeData treeData;
+	StructuredSelection selection;
+	
+	private List<ISelectionChangedListener> selectionListeners = new ArrayList<>();
+	private List<ISelectionChangedListener> postSelectionListeners = new ArrayList<>();
+	private List<SelectionListener> selListeners = new ArrayList<>();
+	
+	public NatTableSelectionAdaptor(NatTable natTable, SelectionLayer selectionLayer, GETreeData treeData) {
+		this.natTable = natTable;
+		this.selectionLayer = selectionLayer;
+		this.natTable.addLayerListener(this);
+		this.treeData = treeData;
+	}
+	
+	@Override
+	public void addSelectionChangedListener(ISelectionChangedListener listener) {
+		selectionListeners.add(listener);
+	}
+	
+	@Override
+	public void removeSelectionChangedListener(ISelectionChangedListener listener) {
+		selectionListeners.remove(listener);
+	}
+	
+	@Override
+	public void addPostSelectionChangedListener(ISelectionChangedListener listener) {
+		postSelectionListeners.add(listener);
+	}
+	
+	@Override
+	public void removePostSelectionChangedListener(ISelectionChangedListener listener) {
+		postSelectionListeners.remove(listener);
+	}
+	
+	public void addSelectionListener(SelectionListener listener) {
+		selListeners.add(listener);
+	}
+	
+	public void removeSelectionListener(SelectionListener listener) {
+		selListeners.remove(listener);
+	}
+	
+	@Override
+	public ISelection getSelection() {
+		return selection;
+	}
+	
+	@Override
+	public void setSelection(ISelection selection) {
+		if (!(selection instanceof StructuredSelection))
+			throw new IllegalArgumentException("Selection must be structured selection");
+		
+	}
+	
+	
+	
+	private List<Point> selectedCells = new ArrayList<Point>();
+	
+	@Override
+	public void handleLayerEvent(ILayerEvent event) {
+		if (event instanceof CellSelectionEvent) {
+			evaluateSeletedCells();
+		} 
+	}
+	
+	/**
+	 * Processes current selection to data indices.
+	 */
+	private void evaluateSeletedCells() {
+		selectedCells.clear();
+		for (PositionCoordinate pc : selectionLayer.getSelectedCellPositions()) {
+			ILayerCell cell = pc.getLayer().getCellByPosition(pc.columnPosition, pc.rowPosition);
+			selectedCells.add(new Point(cell.getColumnIndex(), cell.getRowIndex()));
+		}
+		MapList<Integer, Integer> rowMap = new MapList<>();
+		for (Point p : selectedCells) {
+			rowMap.add(p.y, p.x);
+		}
+		List<RowSelectionItem> selectionItems = new ArrayList<>(rowMap.getKeySize());
+		for (Integer row : rowMap.getKeys()) {
+			List<Integer> cols = rowMap.getValues(row);
+			int col[] = new int[cols.size()];
+			for (int i = 0; i < col.length; i++)
+				col[i] = cols.get(i);
+			selectionItems.add(new RowSelectionItem(treeData.getDataAtIndex(row), row, col));
+		}
+		this.selection = new StructuredSelection(selectionItems);
+		fireEvents();
+	}
+	
+	private void fireEvents() {
+		for (ISelectionChangedListener l : selectionListeners) {
+			l.selectionChanged(new SelectionChangedEvent(this, selection));
+		}
+		for (ISelectionChangedListener l : postSelectionListeners) {
+			l.selectionChanged(new SelectionChangedEvent(this, selection));
+		}
+		Event evt = new Event();
+		evt.widget = natTable;
+		evt.display = natTable.getDisplay();
+		evt.data = selection;
+		for (SelectionListener l : selListeners) {
+			SelectionEvent sel = new SelectionEvent(evt);
+			l.widgetSelected(sel);
+		}
+	}
+	
+	public List<Point> getSelectedCells() {
+		return selectedCells;
+	}
+
+}