src/demo/share/jfc/J2Ddemo/java2d/demos/Mix/BezierScroller.java - platform/libcore - Git at Google

 /*
  *
  * Copyright (c) 2007, 2011, 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:
  *
  *   - 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.
  *
  *   - Neither the name of Oracle nor 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 java2d.demos.Mix;


 import static java.awt.Color.LIGHT_GRAY;
 import static java.awt.Color.WHITE;
 import static java.lang.Math.random;
 import java.awt.AlphaComposite;
 import java.awt.BasicStroke;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Dimension;
 import java.awt.Font;
 import java.awt.FontMetrics;
 import java.awt.Graphics2D;
 import java.awt.Image;
 import java.awt.RenderingHints;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.geom.GeneralPath;
 import java.awt.geom.Path2D;
 import java.awt.geom.PathIterator;
 import java.awt.image.BufferedImage;
 import java.io.BufferedReader;
 import java.io.FileReader;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java2d.AnimatingControlsSurface;
 import java2d.CustomControls;
 import javax.swing.AbstractButton;
 import javax.swing.JComboBox;
 import javax.swing.JToggleButton;
 import javax.swing.JToolBar;


 /**
  * Animated Bezier Curve shape with images at the control points.
  * README.txt file scrolling up. Composited Image fading in and out.
  */
 @SuppressWarnings("serial")
 public class BezierScroller extends AnimatingControlsSurface {

     private static String appletStrs[] = { " ", "J2Ddemo",
         "BezierScroller - Animated Bezier Curve shape with images",
         "For README.txt file scrolling run in application mode", " " };
     private static final int NUMPTS = 6;
     private static Color greenBlend = new Color(0, 255, 0, 100);
     private static Color blueBlend = new Color(0, 0, 255, 100);
     private static Font font = new Font(Font.SERIF, Font.PLAIN, 12);
     private static BasicStroke bs = new BasicStroke(3.0f);
     private static Image hotj_img;
     private static BufferedImage img;
     private static final int UP = 0;
     private static final int DOWN = 1;
     private float animpts[] = new float[NUMPTS * 2];
     private float deltas[] = new float[NUMPTS * 2];
     private BufferedReader reader;
     private int nStrs;
     private int strH;
     private int yy, ix, iy, imgX;
     private List<String> vector, appletVector;
     private float alpha = 0.2f;
     private int alphaDirection;
     protected boolean doImage, doShape, doText;
     protected boolean buttonToggle;

     /*
      * Using this to scale down globe.png since we want a smaller version,
      * I know it is 100 x 160 and has a transparent pixel.
      */
     private Image scaled(Image src) {
         int sw = src.getWidth(null);
         int sh = src.getHeight(null);
         int dw = sw/5;
         int dh = sh/5;
         BufferedImage bi =
             new BufferedImage(dw, dh, BufferedImage.TYPE_INT_ARGB);
         Graphics2D g2d = bi.createGraphics();
         g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                              RenderingHints.VALUE_INTERPOLATION_BICUBIC);
         g2d.drawImage(src, 0, 0, dw, dh, 0, 0, sw, sh, null);
         g2d.dispose();
         return bi;
     }

     @SuppressWarnings("LeakingThisInConstructor")
     public BezierScroller() {
         setBackground(WHITE);
         doShape = doText = true;
         hotj_img = scaled(getImage("globe.png"));
         Image image = getImage("jumptojavastrip.png");
         int iw = image.getWidth(this);
         int ih = image.getHeight(this);
         img = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
         img.createGraphics().drawImage(image, 0, 0, this);
         setControls(new Component[] { new DemoControls(this) });
     }

     public void animate(float[] pts, float[] deltas, int index, int limit) {
         float newpt = pts[index] + deltas[index];
         if (newpt <= 0) {
             newpt = -newpt;
             deltas[index] = (float) (random() * 4.0 + 2.0);
         } else if (newpt >= limit) {
             newpt = 2.0f * limit - newpt;
             deltas[index] = -(float) (random() * 4.0 + 2.0);
         }
         pts[index] = newpt;
     }

     public void getFile() {
         try {
             String fName = "README.txt";
             if ((reader = new BufferedReader(new FileReader(fName))) != null) {
                 getLine();
             }
         } catch (Exception e) {
             reader = null;
         }
         if (reader == null) {
             appletVector = new ArrayList<String>(100);
             for (int i = 0; i < 100; i++) {
                 appletVector.add(appletStrs[i % appletStrs.length]);
             }
             getLine();
         }
         buttonToggle = true;
     }

     public String getLine() {
         String str = null;
         if (reader != null) {
             try {
                 if ((str = reader.readLine()) != null) {
                     if (str.length() == 0) {
                         str = " ";
                     }
                     vector.add(str);
                 }
             } catch (Exception e) {
                 Logger.getLogger(BezierScroller.class.getName()).log(
                         Level.SEVERE,
                         null, e);
                 reader = null;
             }
         } else {
             if (!appletVector.isEmpty()) {
                 vector.add(str = appletVector.remove(0));
             }
         }
         return str;
     }

     @Override
     public void reset(int w, int h) {
         for (int i = 0; i < animpts.length; i += 2) {
             animpts[i + 0] = (float) (random() * w);
             animpts[i + 1] = (float) (random() * h);
             deltas[i + 0] = (float) (random() * 6.0 + 4.0);
             deltas[i + 1] = (float) (random() * 6.0 + 4.0);
             if (animpts[i + 0] > w / 2.0f) {
                 deltas[i + 0] = -deltas[i + 0];
             }
             if (animpts[i + 1] > h / 2.0f) {
                 deltas[i + 1] = -deltas[i + 1];
             }
         }
         FontMetrics fm = getFontMetrics(font);
         strH = fm.getAscent() + fm.getDescent();
         nStrs = h / strH + 2;
         vector = new ArrayList<String>(nStrs);
         ix = (int) (random() * (w - 80));
         iy = (int) (random() * (h - 80));
     }

     @Override
     public void step(int w, int h) {
         if (doText && vector.isEmpty()) {
             getFile();
         }
         if (doText) {
             String s = getLine();
             if (s == null || vector.size() == nStrs && !vector.isEmpty()) {
                 vector.remove(0);
             }
             yy = (s == null) ? 0 : h - vector.size() * strH;
         }

         for (int i = 0; i < animpts.length && doShape; i += 2) {
             animate(animpts, deltas, i + 0, w);
             animate(animpts, deltas, i + 1, h);
         }
         if (doImage && alphaDirection == UP) {
             if ((alpha += 0.025) > .99) {
                 alphaDirection = DOWN;
                 alpha = 1.0f;
             }
         } else if (doImage && alphaDirection == DOWN) {
             if ((alpha -= .02) < 0.01) {
                 alphaDirection = UP;
                 alpha = 0;
                 ix = (int) (random() * (w - 80));
                 iy = (int) (random() * (h - 80));
             }
         }
         if (doImage) {
             if ((imgX += 80) == 800) {
                 imgX = 0;
             }
         }
     }

     @Override
     public void render(int w, int h, Graphics2D g2) {

         if (doText) {
             g2.setColor(LIGHT_GRAY);
             g2.setFont(font);
             float y = yy;
             //for (int i = 0; i < vector.size(); i++) {
             for (String string : vector) {
                 g2.drawString(string, 1, y += strH);
             }
         }

         if (doShape) {
             float[] ctrlpts = animpts;
             int len = ctrlpts.length;
             float prevx = ctrlpts[len - 2];
             float prevy = ctrlpts[len - 1];
             float curx = ctrlpts[0];
             float cury = ctrlpts[1];
             float midx = (curx + prevx) / 2.0f;
             float midy = (cury + prevy) / 2.0f;
             GeneralPath gp = new GeneralPath(Path2D.WIND_NON_ZERO);
             gp.moveTo(midx, midy);
             for (int i = 2; i <= ctrlpts.length; i += 2) {
                 float x1 = (midx + curx) / 2.0f;
                 float y1 = (midy + cury) / 2.0f;
                 prevx = curx;
                 prevy = cury;
                 if (i < ctrlpts.length) {
                     curx = ctrlpts[i + 0];
                     cury = ctrlpts[i + 1];
                 } else {
                     curx = ctrlpts[0];
                     cury = ctrlpts[1];
                 }
                 midx = (curx + prevx) / 2.0f;
                 midy = (cury + prevy) / 2.0f;
                 float x2 = (prevx + midx) / 2.0f;
                 float y2 = (prevy + midy) / 2.0f;
                 gp.curveTo(x1, y1, x2, y2, midx, midy);
             }
             gp.closePath();

             g2.setColor(blueBlend);
             g2.setStroke(bs);
             g2.draw(gp);
             g2.setColor(greenBlend);
             g2.fill(gp);

             PathIterator pi = gp.getPathIterator(null);
             float pts[] = new float[6];
             while (!pi.isDone()) {
                 if (pi.currentSegment(pts) == PathIterator.SEG_CUBICTO) {
                     g2.drawImage(hotj_img, (int) pts[0], (int) pts[1], this);
                 }
                 pi.next();
             }
         }

         if (doImage) {
             AlphaComposite ac = AlphaComposite.getInstance(
                     AlphaComposite.SRC_OVER, alpha);
             g2.setComposite(ac);
             g2.drawImage(img.getSubimage(imgX, 0, 80, 80), ix, iy, this);
         }
     }

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


     static final class DemoControls extends CustomControls implements
             ActionListener {

         BezierScroller demo;
         JToolBar toolbar;
         JComboBox combo;

         public DemoControls(BezierScroller demo) {
             super(demo.name);
             this.demo = demo;
             add(toolbar = new JToolBar());
             toolbar.setFloatable(false);
             addTool("Image", false);
             addTool("Shape", true);
             addTool("Text", true);
         }

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

         @Override
         public void actionPerformed(ActionEvent e) {
             JToggleButton b = (JToggleButton) e.getSource();
             if (b.getText().equals("Image")) {
                 demo.doImage = b.isSelected();
             } else if (b.getText().equals("Shape")) {
                 demo.doShape = b.isSelected();
             } else {
                 demo.doText = b.isSelected();
             }
             if (!demo.animating.running()) {
                 demo.repaint();
             }
         }

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

         @Override
         @SuppressWarnings("SleepWhileHoldingLock")
         public void run() {
             Thread me = Thread.currentThread();
             int i = 0;
             while (thread == me) {
                 try {
                     Thread.sleep(250);
                 } catch (InterruptedException e) {
                     return;
                 }
                 if (demo.buttonToggle) {
                     ((AbstractButton) toolbar.getComponentAtIndex(i++ % 2)).
                             doClick();
                     demo.buttonToggle = false;
                 }
             }
             thread = null;
         }
     } // End DemoControls
 } // End BezierScroller
	/*
	*
	* Copyright (c) 2007, 2011, 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:
	*
	* - 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.
	*
	* - Neither the name of Oracle nor 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 java2d.demos.Mix;


	import static java.awt.Color.LIGHT_GRAY;
	import static java.awt.Color.WHITE;
	import static java.lang.Math.random;
	import java.awt.AlphaComposite;
	import java.awt.BasicStroke;
	import java.awt.Color;
	import java.awt.Component;
	import java.awt.Dimension;
	import java.awt.Font;
	import java.awt.FontMetrics;
	import java.awt.Graphics2D;
	import java.awt.Image;
	import java.awt.RenderingHints;
	import java.awt.event.ActionEvent;
	import java.awt.event.ActionListener;
	import java.awt.geom.GeneralPath;
	import java.awt.geom.Path2D;
	import java.awt.geom.PathIterator;
	import java.awt.image.BufferedImage;
	import java.io.BufferedReader;
	import java.io.FileReader;
	import java.util.ArrayList;
	import java.util.List;
	import java.util.logging.Level;
	import java.util.logging.Logger;
	import java2d.AnimatingControlsSurface;
	import java2d.CustomControls;
	import javax.swing.AbstractButton;
	import javax.swing.JComboBox;
	import javax.swing.JToggleButton;
	import javax.swing.JToolBar;


	/**
	* Animated Bezier Curve shape with images at the control points.
	* README.txt file scrolling up. Composited Image fading in and out.
	*/
	@SuppressWarnings("serial")
	public class BezierScroller extends AnimatingControlsSurface {

	private static String appletStrs[] = { " ", "J2Ddemo",
	"BezierScroller - Animated Bezier Curve shape with images",
	"For README.txt file scrolling run in application mode", " " };
	private static final int NUMPTS = 6;
	private static Color greenBlend = new Color(0, 255, 0, 100);
	private static Color blueBlend = new Color(0, 0, 255, 100);
	private static Font font = new Font(Font.SERIF, Font.PLAIN, 12);
	private static BasicStroke bs = new BasicStroke(3.0f);
	private static Image hotj_img;
	private static BufferedImage img;
	private static final int UP = 0;
	private static final int DOWN = 1;
	private float animpts[] = new float[NUMPTS * 2];
	private float deltas[] = new float[NUMPTS * 2];
	private BufferedReader reader;
	private int nStrs;
	private int strH;
	private int yy, ix, iy, imgX;
	private List<String> vector, appletVector;
	private float alpha = 0.2f;
	private int alphaDirection;
	protected boolean doImage, doShape, doText;
	protected boolean buttonToggle;

	/*
	* Using this to scale down globe.png since we want a smaller version,
	* I know it is 100 x 160 and has a transparent pixel.
	*/
	private Image scaled(Image src) {
	int sw = src.getWidth(null);
	int sh = src.getHeight(null);
	int dw = sw/5;
	int dh = sh/5;
	BufferedImage bi =
	new BufferedImage(dw, dh, BufferedImage.TYPE_INT_ARGB);
	Graphics2D g2d = bi.createGraphics();
	g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
	RenderingHints.VALUE_INTERPOLATION_BICUBIC);
	g2d.drawImage(src, 0, 0, dw, dh, 0, 0, sw, sh, null);
	g2d.dispose();
	return bi;
	}

	@SuppressWarnings("LeakingThisInConstructor")
	public BezierScroller() {
	setBackground(WHITE);
	doShape = doText = true;
	hotj_img = scaled(getImage("globe.png"));
	Image image = getImage("jumptojavastrip.png");
	int iw = image.getWidth(this);
	int ih = image.getHeight(this);
	img = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
	img.createGraphics().drawImage(image, 0, 0, this);
	setControls(new Component[] { new DemoControls(this) });
	}

	public void animate(float[] pts, float[] deltas, int index, int limit) {
	float newpt = pts[index] + deltas[index];
	if (newpt <= 0) {
	newpt = -newpt;
	deltas[index] = (float) (random() * 4.0 + 2.0);
	} else if (newpt >= limit) {
	newpt = 2.0f * limit - newpt;
	deltas[index] = -(float) (random() * 4.0 + 2.0);
	}
	pts[index] = newpt;
	}

	public void getFile() {
	try {
	String fName = "README.txt";
	if ((reader = new BufferedReader(new FileReader(fName))) != null) {
	getLine();
	}
	} catch (Exception e) {
	reader = null;
	}
	if (reader == null) {
	appletVector = new ArrayList<String>(100);
	for (int i = 0; i < 100; i++) {
	appletVector.add(appletStrs[i % appletStrs.length]);
	}
	getLine();
	}
	buttonToggle = true;
	}

	public String getLine() {
	String str = null;
	if (reader != null) {
	try {
	if ((str = reader.readLine()) != null) {
	if (str.length() == 0) {
	str = " ";
	}
	vector.add(str);
	}
	} catch (Exception e) {
	Logger.getLogger(BezierScroller.class.getName()).log(
	Level.SEVERE,
	null, e);
	reader = null;
	}
	} else {
	if (!appletVector.isEmpty()) {
	vector.add(str = appletVector.remove(0));
	}
	}
	return str;
	}

	@Override
	public void reset(int w, int h) {
	for (int i = 0; i < animpts.length; i += 2) {
	animpts[i + 0] = (float) (random() * w);
	animpts[i + 1] = (float) (random() * h);
	deltas[i + 0] = (float) (random() * 6.0 + 4.0);
	deltas[i + 1] = (float) (random() * 6.0 + 4.0);
	if (animpts[i + 0] > w / 2.0f) {
	deltas[i + 0] = -deltas[i + 0];
	}
	if (animpts[i + 1] > h / 2.0f) {
	deltas[i + 1] = -deltas[i + 1];
	}
	}
	FontMetrics fm = getFontMetrics(font);
	strH = fm.getAscent() + fm.getDescent();
	nStrs = h / strH + 2;
	vector = new ArrayList<String>(nStrs);
	ix = (int) (random() * (w - 80));
	iy = (int) (random() * (h - 80));
	}

	@Override
	public void step(int w, int h) {
	if (doText && vector.isEmpty()) {
	getFile();
	}
	if (doText) {
	String s = getLine();
	if (s == null \|\| vector.size() == nStrs && !vector.isEmpty()) {
	vector.remove(0);
	}
	yy = (s == null) ? 0 : h - vector.size() * strH;
	}

	for (int i = 0; i < animpts.length && doShape; i += 2) {
	animate(animpts, deltas, i + 0, w);
	animate(animpts, deltas, i + 1, h);
	}
	if (doImage && alphaDirection == UP) {
	if ((alpha += 0.025) > .99) {
	alphaDirection = DOWN;
	alpha = 1.0f;
	}
	} else if (doImage && alphaDirection == DOWN) {
	if ((alpha -= .02) < 0.01) {
	alphaDirection = UP;
	alpha = 0;
	ix = (int) (random() * (w - 80));
	iy = (int) (random() * (h - 80));
	}
	}
	if (doImage) {
	if ((imgX += 80) == 800) {
	imgX = 0;
	}
	}
	}

	@Override
	public void render(int w, int h, Graphics2D g2) {

	if (doText) {
	g2.setColor(LIGHT_GRAY);
	g2.setFont(font);
	float y = yy;
	//for (int i = 0; i < vector.size(); i++) {
	for (String string : vector) {
	g2.drawString(string, 1, y += strH);
	}
	}

	if (doShape) {
	float[] ctrlpts = animpts;
	int len = ctrlpts.length;
	float prevx = ctrlpts[len - 2];
	float prevy = ctrlpts[len - 1];
	float curx = ctrlpts[0];
	float cury = ctrlpts[1];
	float midx = (curx + prevx) / 2.0f;
	float midy = (cury + prevy) / 2.0f;
	GeneralPath gp = new GeneralPath(Path2D.WIND_NON_ZERO);
	gp.moveTo(midx, midy);
	for (int i = 2; i <= ctrlpts.length; i += 2) {
	float x1 = (midx + curx) / 2.0f;
	float y1 = (midy + cury) / 2.0f;
	prevx = curx;
	prevy = cury;
	if (i < ctrlpts.length) {
	curx = ctrlpts[i + 0];
	cury = ctrlpts[i + 1];
	} else {
	curx = ctrlpts[0];
	cury = ctrlpts[1];
	}
	midx = (curx + prevx) / 2.0f;
	midy = (cury + prevy) / 2.0f;
	float x2 = (prevx + midx) / 2.0f;
	float y2 = (prevy + midy) / 2.0f;
	gp.curveTo(x1, y1, x2, y2, midx, midy);
	}
	gp.closePath();

	g2.setColor(blueBlend);
	g2.setStroke(bs);
	g2.draw(gp);
	g2.setColor(greenBlend);
	g2.fill(gp);

	PathIterator pi = gp.getPathIterator(null);
	float pts[] = new float[6];
	while (!pi.isDone()) {
	if (pi.currentSegment(pts) == PathIterator.SEG_CUBICTO) {
	g2.drawImage(hotj_img, (int) pts[0], (int) pts[1], this);
	}
	pi.next();
	}
	}

	if (doImage) {
	AlphaComposite ac = AlphaComposite.getInstance(
	AlphaComposite.SRC_OVER, alpha);
	g2.setComposite(ac);
	g2.drawImage(img.getSubimage(imgX, 0, 80, 80), ix, iy, this);
	}
	}

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


	static final class DemoControls extends CustomControls implements
	ActionListener {

	BezierScroller demo;
	JToolBar toolbar;
	JComboBox combo;

	public DemoControls(BezierScroller demo) {
	super(demo.name);
	this.demo = demo;
	add(toolbar = new JToolBar());
	toolbar.setFloatable(false);
	addTool("Image", false);
	addTool("Shape", true);
	addTool("Text", true);
	}

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

	@Override
	public void actionPerformed(ActionEvent e) {
	JToggleButton b = (JToggleButton) e.getSource();
	if (b.getText().equals("Image")) {
	demo.doImage = b.isSelected();
	} else if (b.getText().equals("Shape")) {
	demo.doShape = b.isSelected();
	} else {
	demo.doText = b.isSelected();
	}
	if (!demo.animating.running()) {
	demo.repaint();
	}
	}

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

	@Override
	@SuppressWarnings("SleepWhileHoldingLock")
	public void run() {
	Thread me = Thread.currentThread();
	int i = 0;
	while (thread == me) {
	try {
	Thread.sleep(250);
	} catch (InterruptedException e) {
	return;
	}
	if (demo.buttonToggle) {
	((AbstractButton) toolbar.getComponentAtIndex(i++ % 2)).
	doClick();
	demo.buttonToggle = false;
	}
	}
	thread = null;
	}
	} // End DemoControls
	} // End BezierScroller