/*FreeMind - A Program for creating and viewing Mindmaps
 *Copyright (C) 2005  Christian Foltin <christianfoltin@users.sourceforge.net>
 *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.
 */


package freemind.modes.mindmapmode.listeners;

import java.awt.Point;
import java.awt.event.MouseEvent;

import freemind.controller.MapMouseMotionListener.MapMouseMotionReceiver;
import freemind.modes.MindMapArrowLink;
import freemind.modes.mindmapmode.MindMapController;
import freemind.view.mindmapview.MapView;

/** */
public class MindMapMouseMotionManager implements MapMouseMotionReceiver {

	int originX = -1;

	int originY = -1;

	MindMapArrowLink draggedLink = null;

	private Point draggedLinkOldStartPoint;

	private Point draggedLinkOldEndPoint;

	private final MindMapController mController;

	// |= oldX >=0 iff we are in the drag

	/**
     *
     */
	public MindMapMouseMotionManager(MindMapController controller) {
		super();
		this.mController = controller;

	}

	public void mouseDragged(MouseEvent e) {
		MapView mapView = (MapView) e.getComponent();
		// Always try to get mouse to the original position in the Map.
		if (originX >= 0) {
			if (draggedLink != null) {
				int deltaX = (int) ((e.getX() - originX) / mController
						.getView().getZoom());
				int deltaY = (int) ((e.getY() - originY) / mController
						.getView().getZoom());
				draggedLink.changeInclination(mapView, originX, originY,
						deltaX, deltaY);
				originX = e.getX();
				originY = e.getY();
				mController.getView().repaint();
			} else {
				mapView.scrollBy(originX - e.getX(), originY - e.getY());
			}
		}
	}

	public void mousePressed(MouseEvent e) {
		if (!mController.isBlocked() && e.getButton() == MouseEvent.BUTTON1) {
			mController.getView().setMoveCursor(true);
			originX = e.getX();
			originY = e.getY();
			draggedLink = mController.getView().detectCollision(
					new Point(originX, originY));
			if (draggedLink != null) {
				draggedLinkOldStartPoint = draggedLink.getStartInclination();
				draggedLinkOldEndPoint = draggedLink.getEndInclination();
				draggedLink.showControlPoints(true);
				mController.getView().repaint();
			}

		}
	}

	public void mouseReleased(MouseEvent e) {
		originX = -1;
		originY = -1;
		if (draggedLink != null) {
			draggedLink.showControlPoints(false);
			// make action undoable.

			Point draggedLinkNewStartPoint = draggedLink.getStartInclination();
			Point draggedLinkNewEndPoint = draggedLink.getEndInclination();
			// restore old positions.
			draggedLink.setStartInclination(draggedLinkOldStartPoint);
			draggedLink.setEndInclination(draggedLinkOldEndPoint);
			// and change to the new again.
			mController.setArrowLinkEndPoints(draggedLink,
					draggedLinkNewStartPoint, draggedLinkNewEndPoint);
			mController.getView().repaint();
			draggedLink = null;
		}

	}

}