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/*
 * Bibliothek - DockingFrames
 * Library built on Java/Swing, allows the user to "drag and drop"
 * panels containing any Swing-Component the developer likes to add.
 * 
 * Copyright (C) 2012 Herve Guillaume, Benjamin Sigg
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Herve Guillaume
 * [email protected]
 * FR - France
 *
 * Benjamin Sigg
 * [email protected]
 * CH - Switzerland
 */

package bibliothek.gui.dock.wizard;

import java.awt.Rectangle;

import bibliothek.gui.Dockable;
import bibliothek.gui.dock.SplitDockStation.Orientation;
import bibliothek.gui.dock.station.split.Divideable;
import bibliothek.gui.dock.station.split.Leaf;

/**
 * This divider marks the outer {@link Dockable} of one column as being resized.
 * @author Benjamin Sigg
 */
public class CellDivider implements Divideable{
	private WizardSplitDockStation station;
	private Leaf leaf;
	
	public CellDivider( WizardSplitDockStation station, Leaf leaf ){
		this.station = station;
		this.leaf = leaf;
	}
	
	public Leaf getLeaf(){
		return leaf;
	}
	
	@Override
	public double getDividerAt( int x, int y ){
		Rectangle bounds = leaf.getBounds();
		int gap = station.getDividerSize();
		
		switch( station.getSide() ){
			case LEFT:
			case RIGHT:
				return (y - bounds.y + gap/2) / (double)(bounds.height + gap/2);
			case BOTTOM:
			case TOP:
				return (x - bounds.x + gap/2) / (double)(bounds.width + gap/2);
			default:
				throw new IllegalArgumentException( "unknown side: " + station.getSide() );
		}
	}

	@Override
	public Rectangle getDividerBounds( double divider, Rectangle bounds ){
		if( bounds == null ){
			bounds = new Rectangle();
		}
		Rectangle leafBounds = leaf.getBounds();
		int gap = station.getDividerSize();
		
		switch( station.getSide() ){
			case LEFT:
			case RIGHT:
				bounds.x = leafBounds.x;
				bounds.width = leafBounds.width;
				bounds.height = gap;
				bounds.y = (int)(divider * (leafBounds.height + gap/2) + leafBounds.y - gap/2);
				return bounds;
			case BOTTOM:
			case TOP:
				bounds.y = leafBounds.y;
				bounds.height = leafBounds.height;
				bounds.width = gap;
				bounds.x = (int)(divider * (leafBounds.width + gap/2) + leafBounds.x - gap/2);
				return bounds;
			default:
				throw new IllegalArgumentException( "unknown side: " + station.getSide() );
		}
	}

	@Override
	public Orientation getOrientation(){
		switch( station.getSide() ){
			case LEFT:
			case RIGHT:
				return Orientation.VERTICAL;
			case TOP:
			case BOTTOM:
				return Orientation.HORIZONTAL;
			default:
				throw new IllegalStateException( "unknown side: " + station.getSide() );
		}
	}

	@Override
	public double getDivider(){
		return 1;
	}

	@Override
	public void setDivider( double dividier ){
		// ignored
	}

	@Override
	public double validateDivider( double divider ){
		return station.getWizardSplitLayoutManager().validateDivider( divider, leaf );
	}

}