public class PreserveSelectionStructuralChangeEventHandler implements ILayerEventHandler<IStructuralChangeEvent> {

	private final SelectionLayer selectionLayer;
	
	public PreserveSelectionStructuralChangeEventHandler(SelectionLayer selectionLayer) {
		this.selectionLayer = selectionLayer;
	}

	public Class<IStructuralChangeEvent> getLayerEventClass() {
		return IStructuralChangeEvent.class;
	}

	@Override
	public void handleLayerEvent(IStructuralChangeEvent event) {
		PositionCoordinate[] coords = this.selectionLayer.getSelectedCellPositions();
		for (PositionCoordinate coord : coords) {
			if (coord.getColumnPosition() >= this.selectionLayer.getColumnCount()
					|| coord.getRowPosition() >= this.selectionLayer.getRowCount()) {
				//if the coordinates of the selected cells are outside the valid range remove the selection
				this.selectionLayer.clearSelection(
						coord.getColumnPosition(), 
						coord.getRowPosition());
			}
		}

	}
	
	
}