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/*
 * Copyright (c) 2008-2011, Piccolo2D project, http://piccolo2d.org
 * Copyright (c) 1998-2008, University of Maryland
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this list of conditions
 * and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions
 * and the following disclaimer in the documentation and/or other materials provided with the
 * distribution.
 *
 * None of the name of the University of Maryland, the name of the Piccolo2D project, or the names of its
 * contributors may be used to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.piccolo2d.tutorial;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.geom.Point2D;

import org.piccolo2d.PCanvas;
import org.piccolo2d.PNode;
import org.piccolo2d.event.PBasicInputEventHandler;
import org.piccolo2d.event.PDragSequenceEventHandler;
import org.piccolo2d.event.PInputEvent;
import org.piccolo2d.event.PInputEventFilter;
import org.piccolo2d.extras.PFrame;
import org.piccolo2d.nodes.PPath;
import org.piccolo2d.util.PDimension;


public class UserInteraction extends PFrame {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    public UserInteraction() {
        super();
    }

    public void initialize() {
        // Create a Camera Event Listener.

        // Remove the pan event handler that is installed by default so that it
        // does not conflict with our new squiggle handler.
        getCanvas().setPanEventHandler(null);

        // Create a squiggle handler and register it with the Canvas.
        final PBasicInputEventHandler squiggleHandler = new SquiggleHandler(getCanvas());
        getCanvas().addInputEventListener(squiggleHandler);

        // Create a Node Event Listener.

        // Create a green rectangle node.
        final PNode nodeGreen = PPath.createRectangle(0, 0, 100, 100);
        nodeGreen.setPaint(Color.GREEN);
        getCanvas().getLayer().addChild(nodeGreen);

        // Attach event handler directly to the node.
        nodeGreen.addInputEventListener(new PBasicInputEventHandler() {
            public void mousePressed(final PInputEvent event) {
                event.getPickedNode().setPaint(Color.ORANGE);
                event.getInputManager().setKeyboardFocus(event.getPath());
                event.setHandled(true);
            }

            public void mouseDragged(final PInputEvent event) {
                final PNode aNode = event.getPickedNode();
                final PDimension delta = event.getDeltaRelativeTo(aNode);
                aNode.translate(delta.width, delta.height);
                event.setHandled(true);
            }

            public void mouseReleased(final PInputEvent event) {
                event.getPickedNode().setPaint(Color.GREEN);
                event.setHandled(true);
            }

            public void keyPressed(final PInputEvent event) {
                final PNode node = event.getPickedNode();
                switch (event.getKeyCode()) {
                    case KeyEvent.VK_UP:
                        node.translate(0, -10f);
                        break;
                    case KeyEvent.VK_DOWN:
                        node.translate(0, 10f);
                        break;
                    case KeyEvent.VK_LEFT:
                        node.translate(-10f, 0);
                        break;
                    case KeyEvent.VK_RIGHT:
                        node.translate(10f, 0);
                        break;
                }
            }
        });
    }

    public class SquiggleHandler extends PDragSequenceEventHandler {
        protected PCanvas canvas;

        // The squiggle that is currently getting created.
        protected PPath squiggle;

        public SquiggleHandler(final PCanvas aCanvas) {
            canvas = aCanvas;
            setEventFilter(new PInputEventFilter(InputEvent.BUTTON1_MASK));
        }

        public void startDrag(final PInputEvent e) {
            super.startDrag(e);

            final Point2D p = e.getPosition();

            // Create a new squiggle and add it to the canvas.
            squiggle = new PPath();
            squiggle.moveTo((float) p.getX(), (float) p.getY());
            squiggle.setStroke(new BasicStroke((float) (1 / e.getCamera().getViewScale())));
            canvas.getLayer().addChild(squiggle);

            // Reset the keydboard focus.
            e.getInputManager().setKeyboardFocus(null);
        }

        public void drag(final PInputEvent e) {
            super.drag(e);
            // Update the squiggle while dragging.
            updateSquiggle(e);
        }

        public void endDrag(final PInputEvent e) {
            super.endDrag(e);
            // Update the squiggle one last time.
            updateSquiggle(e);
            squiggle = null;
        }

        public void updateSquiggle(final PInputEvent aEvent) {
            // Add a new segment to the squiggle from the last mouse position
            // to the current mouse position.
            final Point2D p = aEvent.getPosition();
            squiggle.lineTo((float) p.getX(), (float) p.getY());
        }
    }

    public static void main(final String[] args) {
        new UserInteraction();
    }
}