ecommons.waltable/org.eclipse.statet.ecommons.waltable.core/src/org/eclipse/statet/ecommons/waltable/grid/layer/CornerLayer.java

/*=============================================================================#
 # Copyright (c) 2012, 2021 Original NatTable 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 NatTable authors and others - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.ecommons.waltable.grid.layer;

import static org.eclipse.statet.ecommons.waltable.coordinate.Orientation.HORIZONTAL;
import static org.eclipse.statet.ecommons.waltable.coordinate.Orientation.VERTICAL;

import org.eclipse.statet.ecommons.waltable.layer.ILayer;
import org.eclipse.statet.ecommons.waltable.layer.ILayerDim;
import org.eclipse.statet.ecommons.waltable.layer.cell.ILayerCell;
import org.eclipse.statet.ecommons.waltable.layer.cell.LayerCell;
import org.eclipse.statet.ecommons.waltable.layer.cell.LayerCellDim;
import org.eclipse.statet.ecommons.waltable.painter.layer.CellLayerPainter;
import org.eclipse.statet.ecommons.waltable.painter.layer.ILayerPainter;


/**
 * Layer for the top left header corner of the grid layer
 */
public class CornerLayer extends DimensionallyDependentLayer {
	
	
	/**
	 * Creates a corner header layer using the default configuration and painter
	 * 
	 * @param baseLayer
	 *            The data provider for this layer
	 * @param horizontalLayerDependency
	 *            The layer to link the horizontal dimension to, typically the row header layer
	 * @param verticalLayerDependency
	 *            The layer to link the vertical dimension to, typically the column header layer
	 */
	public CornerLayer(final ILayer baseLayer,
			final ILayer horizontalLayerDependency, final ILayer verticalLayerDependency) {
		this(baseLayer, horizontalLayerDependency, verticalLayerDependency, true, new CellLayerPainter());
	}
	
	/**
	 * @param baseLayer
	 *            The data provider for this layer
	 * @param horizontalLayerDependency
	 *            The layer to link the horizontal dimension to, typically the row header layer
	 * @param verticalLayerDependency
	 *            The layer to link the vertical dimension to, typically the column header layer
	 * @param useDefaultConfiguration
	 *            If default configuration should be applied to this layer (at moment none)
	 * @param layerPainter
	 *            The painter for this layer or <code>null</code> to use the painter of the base layer
	 */
	public CornerLayer(final ILayer baseLayer,
			final ILayer horizontalLayerDependency, final ILayer verticalLayerDependency,
			final boolean useDefaultConfiguration, final ILayerPainter layerPainter) {
		super(baseLayer, horizontalLayerDependency, verticalLayerDependency);
		
		this.layerPainter= layerPainter;
	}
	
	
	@Override
	public ILayerCell getCellByPosition(final long columnPosition, final long rowPosition) {
		final ILayerDim hDim= getDim(HORIZONTAL);
		final ILayerDim vDim= getDim(VERTICAL);
		final long columnId= hDim.getPositionId(columnPosition, columnPosition);
		final long rowId= vDim.getPositionId(rowPosition, rowPosition);
		
		return new LayerCell(this,
				new LayerCellDim(HORIZONTAL, columnId,
						columnPosition, 0, hDim.getPositionCount() ),
				new LayerCellDim(VERTICAL, rowId,
						rowPosition, 0, getVerticalLayerDependency().getRowCount()) );
	}
	
}