NatTable/src/org/eclipse/nebula/widgets/nattable/core/layer/impl/header/ColumnHeaderLayer.xtend

package org.eclipse.nebula.widgets.nattable.core.layer.impl.header

import org.eclipse.nebula.widgets.nattable.core.layer.Layer
import org.eclipse.nebula.widgets.nattable.core.layer.LayerDataAccessor
import org.eclipse.nebula.widgets.nattable.core.layer.axis.Axis
import org.eclipse.nebula.widgets.nattable.core.layer.axis.impl.SimpleAxis
import org.eclipse.nebula.widgets.nattable.core.layer.cell.impl.DataAccessorCell

/**
 * A layer of height 1 whose cell data comes from its horizontal axis.
 */
class ColumnHeaderLayer implements Layer, LayerDataAccessor {
	
	val Axis horizontalAxis
	val Axis verticalAxis
	
	new(Axis horizontalAxis) {
		this.horizontalAxis = horizontalAxis
		
		this.verticalAxis = new SimpleAxis(1, 20)
	}
	
	// Layer interface
	
	override getHorizontalAxis() { horizontalAxis }
	override getVerticalAxis() { verticalAxis }
	
	override getCell(int columnPosition, int rowPosition) {
		new DataAccessorCell(this, columnPosition, rowPosition, this)
	}
	
	// LayerDataAccessor interface
	
	override getCellDataValue(int columnPosition, int rowPosition) {
		horizontalAxis.getSegment(columnPosition).dataValue
	}
	
	override setCellDataValue(int columnPosition, int rowPosition, Object newValue) {
		horizontalAxis.getSegment(columnPosition).setDataValue(newValue)
	}
	
}