/*
 * %W% %E%
 * 
 * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 * be used to endorse or promote products derived from this software without 
 * specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL 
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
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/*
 * %W% %E%
 */

package java2d.demos.Clipping;

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.GeneralPath;
import javax.swing.*;
import java2d.ControlsSurface;
import java2d.CustomControls;

import static java.awt.Color.*;


/**
 * The Areas class demonstrates the CAG (Constructive Area Geometry) 
 * operations: Add(union), Subtract, Intersect, and ExclusiveOR.
 */
public class Areas extends ControlsSurface {

    protected String areaType = "nop";


    public Areas() {
        setBackground(WHITE);
        setControls(new Component[] { new DemoControls(this) });
    }


    public void render(int w, int h, Graphics2D g2) {
        GeneralPath p1 = new GeneralPath();
        p1.moveTo( w * .25f,      0.0f);
        p1.lineTo( w * .75f,   h * .5f);
        p1.lineTo( w * .25f, (float) h);
        p1.lineTo(     0.0f,   h * .5f);
        p1.closePath();

        GeneralPath p2 = new GeneralPath();
        p2.moveTo(  w * .75f,      0.0f);
        p2.lineTo( (float) w,   h * .5f);
        p2.lineTo(  w * .75f, (float) h);
        p2.lineTo(  w * .25f,   h * .5f);
        p2.closePath();


        Area area = new Area(p1);
        g2.setColor(YELLOW);
        if (areaType.equals("nop")) {
            g2.fill(p1);
            g2.fill(p2);
            g2.setColor(RED);
            g2.draw(p1);
            g2.draw(p2);
            return;
        } else if (areaType.equals("add" )) { area.add        (new Area(p2));
        } else if (areaType.equals("sub" )) { area.subtract   (new Area(p2));
        } else if (areaType.equals("xor" )) { area.exclusiveOr(new Area(p2));
        } else if (areaType.equals("int" )) { area.intersect  (new Area(p2));
        } else if (areaType.equals("pear")) {

            double sx = w/100;
            double sy = h/140;
            g2.scale(sx, sy);
            double x = w/sx/2;
            double y = h/sy/2;

            // Creates the first leaf by filling the intersection of two Area 
            // objects created from an ellipse.
            Ellipse2D leaf = new Ellipse2D.Double(x-16, y-29, 15.0, 15.0);
            Area leaf1 = new Area(leaf);
            leaf.setFrame(x-14, y-47, 30.0, 30.0);
            Area leaf2 = new Area(leaf); 
            leaf1.intersect(leaf2);   
            g2.setColor(GREEN);
            g2.fill(leaf1);   

            // Creates the second leaf.
            leaf.setFrame(x+1, y-29, 15.0, 15.0);
            leaf1 = new Area(leaf);
            leaf2.intersect(leaf1);
            g2.fill(leaf2);

            // Creates the stem by filling the Area resulting from the 
            // subtraction of two Area objects created from an ellipse.
            Ellipse2D stem = new Ellipse2D.Double(x, y-42, 40.0, 40.0);
            Area st1 = new Area(stem);
            stem.setFrame(x+3, y-47, 50.0, 50.0);
            st1.subtract(new Area(stem));
            g2.setColor(BLACK);
            g2.fill(st1);

            // Creates the pear itself by filling the Area resulting from the 
            // union of two Area objects created by two different ellipses.
            Ellipse2D circle = new Ellipse2D.Double(x-25, y, 50.0, 50.0);
            Ellipse2D oval = new Ellipse2D.Double(x-19, y-20, 40.0, 70.0);
            Area circ = new Area(circle);
            circ.add(new Area(oval));

            g2.setColor(YELLOW);
            g2.fill(circ);
            return;
        }
        
        g2.fill(area);
        g2.setColor(RED);
        g2.draw(area);
    }


    public static void main(String argv[]) {
        createDemoFrame(new Areas());
    }



    static class DemoControls extends CustomControls implements ActionListener {

        Areas demo;
        JToolBar toolbar;
        JComboBox combo;

        public DemoControls(Areas demo) {
            super(demo.name);
            this.demo = demo;
            add(toolbar = new JToolBar());
            toolbar.setFloatable(false);
            addTool("nop",  "no area operation", true );
            addTool("add",  "add",               false);
            addTool("sub",  "subtract",          false);
            addTool("xor",  "exclusiveOr",       false);
            addTool("int",  "intersection",      false);
            addTool("pear", "pear",              false);
        }


        public void addTool(String str, String tooltip, boolean state) {
            JToggleButton b = (JToggleButton) toolbar.add(new JToggleButton(str));
            b.setFocusPainted(false);
            b.setToolTipText(tooltip);
            b.setSelected(state);
            b.addActionListener(this);
            int width = (int) b.getPreferredSize().width;
            Dimension prefSize = new Dimension(width, 21);
            b.setPreferredSize(prefSize);
            b.setMaximumSize(prefSize);
            b.setMinimumSize(prefSize);
        }


        public void actionPerformed(ActionEvent e) {
            for (Component comp : toolbar.getComponents()) {
                ((JToggleButton) comp).setSelected(false);
            }
            JToggleButton b = (JToggleButton) e.getSource();
            b.setSelected(true);
            demo.areaType = b.getText();
            demo.repaint();
        }

        public Dimension getPreferredSize() {
            return new Dimension(200,40);
        }

        public void run() {
            try { thread.sleep(1111); } catch (Exception e) { return; }
            Thread me = Thread.currentThread();
            while (thread == me) {
                for (Component comp : toolbar.getComponents()) {
                    ((AbstractButton) comp).doClick();
                    try {
                        thread.sleep(4444);
                    } catch (InterruptedException e) { return; }
                }
            }
            thread = null;
        }
    } // End DemoControls
} // End Areas
