/*FreeMind - A Program for creating and viewing Mindmaps
 *Copyright (C) 2000-2006 Joerg Mueller, Daniel Polansky, Christian Foltin, Dimitri Polivaev and others.
 *
 *See COPYING for Details
 *
 *This program is free software; you can redistribute it and/or
 *modify it under the terms of the GNU General Public License
 *as published by the Free Software Foundation; either version 2
 *of the License, or (at your option) any later version.
 *
 *This program 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 General Public License for more details.
 *
 *You should have received a copy of the GNU General Public License
 *along with this program; if not, write to the Free Software
 *Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
/*
 * Created on 12.03.2004
 *
 */
package accessories.plugins;

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Rectangle;

import javax.swing.JScrollPane;
import javax.swing.JViewport;

import freemind.extensions.ModeControllerHookAdapter;
import freemind.view.mindmapview.MapView;

/**
 * @author foltin
 * @author dimitri: Bug fixes.
 * 
 */
public class FitToPage extends ModeControllerHookAdapter {

	private MapView view;

	/**
	 * 
	 */
	public FitToPage() {
		super();
	}

	public void startupMapHook() {
		super.startupMapHook();
		view = getController().getView();
		if (view == null)
			return;
		zoom();
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				scroll();
			}

		});
	}

	private int shift(int coord1, int size1, int coord2, int size2) {
		return coord1 - coord2 + (size1 - size2) / 2;
	}

	private void scroll() {
		Rectangle rect = view.getInnerBounds();
		Rectangle viewer = view.getVisibleRect();
		view.scrollBy(shift(rect.x, rect.width, viewer.x, viewer.width),
				shift(rect.y, rect.height, viewer.y, viewer.height));
	}

	private void zoom() {
		Rectangle rect = view.getInnerBounds();
		// calculate the zoom:
		double oldZoom = getController().getView().getZoom();
		JViewport viewPort = (JViewport) view.getParent();
		JScrollPane pane = (JScrollPane) viewPort.getParent();
		Dimension viewer = viewPort.getExtentSize();
		logger.info("Found viewer rect=" + viewer.height + "/" + rect.height
				+ ", " + viewer.width + "/" + rect.width);
		double newZoom = viewer.width * oldZoom / (rect.width + 0.0);
		double heightZoom = viewer.height * oldZoom / (rect.height + 0.0);
		if (heightZoom < newZoom) {
			newZoom = heightZoom;
		}
		logger.info("Calculated new zoom " + (newZoom));
		getController().getController().setZoom((float) (newZoom));
	}

}