MouseOver in Drawing

I am making a program that basically draws circles with lines connecting them. When I run my mouse over one of the circles I want some text to be displayed.
How do I do this?
I know that ToolTip is available for buttons, can it work for drawings too? If so then how?
Also, it would be great if when a person moused over one of the circles the circles illuminated. (Grew in size.) How do you do this.
Also this is an applet
Thanks
-Nick
Edited by: paradox_qu on Nov 27, 2007 1:49 AM

One approach I can think of (untested)
-- create an array or ArrayList of Ellipse2D.Double to store your circles.
-- In a MouseMotionListener (or MouseMotionAdapter) mouseMoved () event, iterate over the collection and detect whether any Ellipse2D.Double contains (...) the mouse coordinates.
-- if there can be multiple contains (...) that is, your circles overlap, you'll need to code for that.
-- set instance field values that are used by the paint (...) override (awt) or paintComponent (...) override (swing) and drawString (...) the text (and any other graphics work).
For a ToolTip, I think it should work to setToolTipText on the JComponent... if this is awt you might have to code it rigorously.
Luck, db

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Overlapping elements mouseover DrawState

Hi guys!
Soo I'm really desperate and some hints or solution would be really appreciated!
I'm building custom framework for more than a year now that have some classes handling UI elements, since I want to draw elements exactly as I want. I've managed to make some goodies as drawing dashed lines, stack multiple images to build a skin with single element, but I have problems with the event handling.
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Group 1
Group 2Group 3
Group 4
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Group 1Button 1
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groupTwo.addEventListener( 'mouseover', simulateButtonOver, false );
buttonOne.addEventListener( 'mouseover', buttonOneMouseover, false );
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Cheers,
Tony

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I am attempting to create a hiding drawer component. This is basically a tabbed frame on the side of the container that will allow you to show and hide it. I am able to get the component to show up but the catch is I need to know how to add components such as JList etc.. to it and have them function properly. When I attempt to add a component to it the painting is not working properly. I'm currently extending JPanel should I be using something else? Thanks for the help guys.
Code is below:
package com.nashilnux.swing;
import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Composite;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Stroke;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.font.FontRenderContext;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.RepaintManager;
import javax.swing.text.AbstractDocument.Content;
* @author me
public class HidingDrawer extends JPanel
     Rectangle2D button = null;
     private boolean showing = false;
     private JList contentList = null;
     private String title = "";
     private boolean mouseOver = false;
     private JScrollPane listSP = null;
     private Color strokeColor = new Color(226, 242, 255);
     private Color backgroundColor = Color.white;
     private Color tabColor = new Color(226, 242, 255);
     private boolean transparent = false;
     private float transparencyLevel = 0.0f;
     private Dimension expandedDimension = new Dimension(300,200);
     public HidingDrawer()
          setOpaque(false);
          setPreferredSize(new Dimension(300, 200));
          addMouseListener(new MouseAdapter()
               @Override
               public void mousePressed(MouseEvent e)
                    hideDrawer(e);
     public HidingDrawer(boolean showDrawer)
          setOpaque(false);
          setPreferredSize(new Dimension(300, 200));
          setLayout(new FlowLayout());
          if (showDrawer)
               showing = false;
          else
               showing = true;
          addMouseListener(new MouseAdapter()
               @Override
               public void mousePressed(MouseEvent e)
                    hideDrawer(e);
               @Override
               public void mouseEntered(MouseEvent e)
                    if (button != null)
                         if (button.contains(new Point2D.Double(e.getX(), e.getY())))
                              System.out.println("Mouse Over");
                              mouseOver = true;
                              repaint();
               @Override
               public void mouseExited(MouseEvent e)
                    System.out.println("Mouse exited");
                    mouseOver = false;
                    repaint();
          initalize();
      * @param args
     public static void main(String[] args)
          JFrame frame = new JFrame();
          frame.getContentPane().setBackground(Color.LIGHT_GRAY);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.setTitle("UI Drawer Demo");
          // North Panel
          JPanel northPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
          northPanel.setBackground(Color.white);
          JLabel titleLbl = new JLabel("UI Drawer Demo");
          titleLbl.setFont(new Font("Helvectia", Font.BOLD, 18));
          northPanel.add(titleLbl);
          // End NorthPanel
          // West panel component
          HidingDrawer hd = new HidingDrawer(true);
          hd.setTitle("Testing");
          hd.setBackgroundColor(new Color(226, 242, 255));
          hd.setStrokeColor(Color.black);
          hd.setTransparent(true);
          hd.setTransparencyLevel(0.5f);
          frame.getContentPane().setBackground(hd.getBackgroundColor());
          // Add list to the drawer
//          String[] values = new String[]{"Testing", "Testing 2", "Testing 3"};
//          JList list = new JList(values);
//          hd.add(list, BorderLayout.CENTER);
          frame.getContentPane().add(hd, BorderLayout.WEST);
          // Center Panel
          JPanel encapPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
          encapPanel.setBackground(hd.getBackgroundColor());
          JPanel centerPanel = new JPanel();
          centerPanel.setBackground(hd.getBackgroundColor());
          GridBagLayout gLayout = new GridBagLayout();
          int row = 0;
          centerPanel.setLayout(gLayout);
          GridBagConstraints c = new GridBagConstraints(0, 0,1,1,0, 0,GridBagConstraints.WEST,0, new Insets(5,5,5,5),0,0);
          JLabel freqLbl = new JLabel("Frequency");
          centerPanel.add(freqLbl, c);
          c.gridx = 1;
          JTextField freqTxt = new JTextField(20);
          centerPanel.add(freqTxt, c);
          encapPanel.add(centerPanel);
          frame.getContentPane().add(northPanel, BorderLayout.NORTH);
          frame.getContentPane().add(encapPanel, BorderLayout.CENTER);
          frame.setSize(new Dimension(800, 600));
          frame.setVisible(true);
     public void initalize()
//          String[] tmpListItems = { "Testing list item 1", "Testing 2", "Testing 3" };
//          contentList = new JList(tmpListItems);
//          contentList.setOpaque(true);
//          contentList.setBackground(getBackgroundColor());
//          Dimension dim = getPreferredSize();
//          dim.setSize(dim.getWidth() - 70, dim.getHeight());
//          listSP = new JScrollPane(contentList);
//          listSP.setPreferredSize(dim);
//          listSP.setOpaque(true);
//          listSP.setBackground(getBackgroundColor());
//          add(listSP);
          setBackground(getBackgroundColor());
          setBorder(BorderFactory.createLineBorder(Color.black));
      * (non-Javadoc)
      * @see javax.swing.JComponent#paintComponent(java.awt.Graphics)
     @Override
     protected void paintComponent(Graphics g)
          Dimension dim = getSize();
          Graphics2D g2d = (Graphics2D) g;
          if (!isShowing())
               System.out.println("Showing: " + showing);
               g2d.setPaint(getBackgroundColor());
               RoundRectangle2D roundRectangle = new RoundRectangle2D.Double(getX() - 10, getY() + 5, dim.width - 20, dim.height - 10, 5, 15);
               g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
               if(isTransparent())
                    Composite alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getTransparencyLevel());
                    g2d.setComposite(alphaComp);
               g2d.fill(roundRectangle);
               BasicStroke stroke = new BasicStroke(3);
               g2d.setStroke(stroke);
               g2d.setPaint(getStrokeColor());
               g2d.draw(roundRectangle);
               // Draw a fake button
               // Get the dimension of the current graphic
               Graphics2D buttonArea = (Graphics2D) g2d.create(getX(), getY(), dim.width, dim.height);
               buttonArea.setColor(getTabColor());
               buttonArea.setFont(new Font("Helvetica", Font.BOLD, 16));
               button = null;
               button = new Rectangle2D.Double(roundRectangle.getBounds().getMaxX(), (roundRectangle.getMaxY() / 2) - 30, 25, 60);
               buttonArea.fill(button);
               buttonArea.draw(button);
               // Draw the text
               buttonArea.setStroke(new BasicStroke(3));
               buttonArea.setPaint(getStrokeColor());
               buttonArea.draw(button);
               buttonArea.setClip(button);
               buttonArea.setPaint(Color.black);
               AffineTransform transformer = buttonArea.getTransform();
               transformer.rotate(Math.toRadians(90));
               buttonArea.transform(transformer);
               Rectangle2D buttonBounds = button.getBounds2D();
               Font buttonFont = new Font("Helvectica", Font.BOLD, 18);
               FontRenderContext frc = buttonArea.getFontRenderContext();
               TextLayout layout = new TextLayout("Hide", buttonFont, frc);
               layout.draw(buttonArea, (float)buttonBounds.getY() + 10,(float)((buttonBounds.getX() - (buttonBounds.getX() *2)) -5));
          else
               System.out.println("Showing: " + showing);
               Graphics2D buttonArea = (Graphics2D) g2d.create(getX(), getY(), dim.width, dim.height);
               buttonArea.setPaint(getTabColor());
               button = null;
               button = new Rectangle2D.Double(0, (dim.getHeight() / 2) - 30, 25, 60);
               if (isTransparent())
                    // Set the Composite
                    Composite alphaComp = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getTransparencyLevel());
                    buttonArea.setComposite(alphaComp);
               buttonArea.fill(button);
               buttonArea.setStroke(new BasicStroke(3));
               buttonArea.setPaint(getStrokeColor());
               buttonArea.draw(button);
          super.paintComponents(g);
     public void hideDrawer(MouseEvent event)
          if (button != null)
               if (button.contains(new Point2D.Double(event.getX(), event.getY())))
                    System.out.println("Button Pressed");
                    if (showing)
                         showing = false;
                         setPreferredSize(new Dimension(300, getSize().height));
                         setSize(new Dimension(300, getSize().height));
                         setVisible(true);
                         // Hide the list
//                         contentList.setVisible(true);
//                         listSP.setVisible(true);
                    else
                         showing = true;
                         setSize(28, getSize().height);
//                         contentList.setVisible(false);
//                         listSP.setVisible(false);
          Object parent = getParent();
          boolean foundParent = false;
          while (!foundParent)
               Component parentsChild = (Component) parent;
               Component fParent = ((Component) parent).getParent();
               if (fParent == null)
                    foundParent = true;
                    parent = parentsChild;
               else
                    parent = fParent;
          Component pComponent = (Component) parent;
          pComponent.repaint();
      * @param showing
      *            the showing to set
     public void showDrawer(boolean showing)
          this.showing = showing;
      * @return the showing
     public boolean isShowing()
          return showing;
      * @param title
      *            the title to set
     public void setTitle(String title)
          this.title = title;
      * @return the title
     public String getTitle()
          return title;
      * @param strokeColor
      *            the strokeColor to set
     public void setStrokeColor(Color strokeColor)
          this.strokeColor = strokeColor;
      * @return the strokeColor
     public Color getStrokeColor()
          return strokeColor;
      * @param backgroundColor
      *            the backgroundColor to set
     public void setBackgroundColor(Color backgroundColor)
          this.backgroundColor = backgroundColor;
      * @return the backgroundColor
     public Color getBackgroundColor()
          return backgroundColor;
      * @param tabColor
      *            the tabColor to set
     public void setTabColor(Color tabColor)
          this.tabColor = tabColor;
      * @return the tabColor
     public Color getTabColor()
          return tabColor;
      * @param transparent the transparent to set
     public void setTransparent(boolean transparent)
          this.transparent = transparent;
      * @return the transparent
     public boolean isTransparent()
          return transparent;
      * @param transparencyLevel the transparencyLevel to set
     public void setTransparencyLevel(float transparencyLevel)
          this.transparencyLevel = transparencyLevel;
      * @return the transparencyLevel
     public float getTransparencyLevel()
          return transparencyLevel;
}

import java.awt.*;
import java.awt.event.*;
import java.awt.font.*;
import java.awt.geom.*;
import javax.swing.*;
public class HD {
    TopCard    topCard;
    HostCard   hostCard;
    CardLayout cards;
    JPanel     cardPanel;
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        Color tab    = UIManager.getColor("TabbedPane.contentAreaColor");
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        cardPanel = new JPanel(cards);
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        cardPanel.add("host", hostCard);
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        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new HD().getContent());
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
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        public void mousePressed(MouseEvent e) {
            Object source = e.getSource();
            Point p = e.getPoint();
            if(source == topCard)
                if(topCard.isControlTrigger(p))
                    cards.next(cardPanel);
            if(source == hostCard)
                if(hostCard.isControlTrigger(p))
                    cards.next(cardPanel);
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    Rectangle2D.Double rect;
    Color strokeColor;
    Color backgroundColor;
    Color tabColor;
    Font font;
    public TopCard(Color stroke, Color bg, Color tab, Font f, Dimension d) {
        strokeColor = stroke;
        backgroundColor = bg;
        tabColor = tab;
        font = f;
        setPreferredSize(d);
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        Dimension dim = getSize();
        g2.setPaint(Color.lightGray);
        g2.fillRect(0, 0, dim.width, dim.height);
        g2.setPaint(tabColor);
        rect = new Rectangle2D.Double(0, (dim.getHeight() / 2) - 30, 25, 60);
        g2.fill(rect);
        g2.setStroke(new BasicStroke(3));
        g2.setPaint(strokeColor);
        g2.draw(rect);
        // Draw label text.
        String s = "Show";
        g2.setFont(font);
        FontRenderContext frc = g2.getFontRenderContext();
        float width = (float)font.getStringBounds(s, frc).getWidth();
        LineMetrics lm = font.getLineMetrics(s, frc);
        float height = lm.getAscent() + lm.getDescent();
        double x = rect.getCenterX() - height/2 + lm.getDescent();
        double y = rect.getCenterY() - width/2;
        AffineTransform at = AffineTransform.getTranslateInstance(x, y);
        at.rotate(Math.PI/2, 0, 0);
        g2.setFont(font.deriveFont(at));
        g2.drawString(s, 0, 0);
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        return rect.contains(p);
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    Rectangle2D.Double rect;
    Color strokeColor;
    Color backgroundColor;
    Color tabColor;
    Font font;
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        strokeColor = stroke;
        backgroundColor = bg;
        tabColor = tab;
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        g2.draw(roundRectangle);
        rect = new Rectangle2D.Double(roundRectangle.getBounds().getMaxX(),
                                     (roundRectangle.getMaxY() / 2) - 30, 25, 60);
        g2.setPaint(tabColor);
        g2.fill(rect);
        g2.setPaint(strokeColor);
        g2.draw(rect);
        g2.setPaint(Color.black);
        // Draw label text.
        String s = "Hide";
        g2.setFont(font);
        FontRenderContext frc = g2.getFontRenderContext();
        float width = (float)font.getStringBounds(s, frc).getWidth();
        LineMetrics lm = font.getLineMetrics(s, frc);
        float height = lm.getAscent() + lm.getDescent();
        x = rect.getCenterX() - height/2 + lm.getDescent();
        y = rect.getCenterY() - width/2;
        AffineTransform at = AffineTransform.getTranslateInstance(x, y);
        at.rotate(Math.PI/2, 0, 0);
        g2.setFont(font.deriveFont(at));
        g2.drawString(s, 0, 0);
    public boolean isControlTrigger(Point p) {
        return rect.contains(p);
}

Problem in drawing line in script tag of mxml file

hai i am new in flex .i was trying to draw line in mxml(using mxml ) and did it.
then i try this in actionscript by making as file and shape class object again did it
but
when i put that specific function in <fx:script> tag of mxml file and call it by mouseover method it is not drawing a line.i am sure that on mouse over function was called .but dont know why line is nort draw here.
Here is my code:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
    xmlns:mx="library://ns.adobe.com/flex/mx">
    <fx:Script>
        <![CDATA[
        import flash.display.Shape;
        var s:Shape = new Shape();
        public function myMain():void
            // Launch your application by right clicking within this class and select: Deubg As > FDT SWF Application
        so.text="button is cliked";
        s.graphics.lineStyle(3, 0x00FF00,.5);
        s.graphics.lineTo(200, 200);
        this.addChild(s);
        so.text="button is cliked";
        ]]>
    </fx:Script>
    <mx:Label alpha=".3" id="so" mouseOver="myMain()" text="Button"/>
</s:Application>
Can anyone tell me where i am going wrong.

It's a good idea to run you code in the debugger because you will be notified of runtime exceptions that the release version of the Flash Player will not show you. Here's the runtime error I got when running your example:
Error: addChild() is not available in this class. Instead, use addElement() or modify the skin, if you have one.
     atspark.components.supportClasses::SkinnableComponent/addChild()[frameworks\projects\ spark\src\spark\components\supportClasses\SkinnableComponent.as:1118]
     at myMain()[b.mxml:19]
     at __so_mouseOver()[b.mxml:27]
The problem with your app is it is calling addChild(), which is not supported on s:Application. You need to call addElement() instead. addElement() only takes an object of type IVisualElement so you need to make your shape a UIComponent. Try this:
            import mx.core.UIComponent;
            private var s:UIComponent = new UIComponent();
            public function myMain():void
                // Launch your application by right clicking within this class and select: Deubg As > FDT SWF Application
                so.text="button is cliked";
                s.graphics.lineStyle(3, 0x00FF00,.5);
                s.graphics.lineTo(200, 200);
                this.addElement(s);
                so.text="button is cliked";
-Darrell

Curious re-drawing of waveforms

I was working with Logic and Soundtrack Pro simultanously today. I noticed that Logic started to re-draw the waveforms everytime I switched back from SP.
So I quit SP and restarted Logic. Same thing still happening. I believe I´ve read somewhere in the forum about this, but can´t find it now.
Any explaination why Logic is doing this constant re-drawing? Any help appreciated!
/juhani

I don't think it's my tablet as the path that gets drawn is accurate. Have you had problems with the path not getting re-drawn, but the new one added to the old one?
Here's an example (drawn with a mouse on another computer)
A quick pencil tool path
Trying to reshape, drawing clockwise. I think we can agree that I was close enough on the ends.
Now drawing the path AGAIN from the other direction.
Now if I'm supposed to be drawing a certain direction when reshaping, shouldn't there be some indicator (like an arrow on mouseover, say) how I should draw it?
If drawing direction isn't the issue, then what is?
I'm willing to work the way the tool wants me to but if the official line is "unexpected results may occur"...that really isn't helpful.

Need Help to Draw and Drag Triangle - URGENT

Hi everyone - I am developing various proofs of the pythagora's theorem
and the following code draws a triangle on screen and the proof follows -
but i need to know how to drag the triangle such tht 1 angle is always set to 90 degrees.
i.e. i need to resize the triangle by dragging its vertex points by which the1 angle remains at 90 no matter what the size.
The proof has got some graphics code hardcoded in it - i.e. LINES AND POLYGONS have been hardcoded
i need to reconfigure that such that everytime the user increases the size of the triagnle and clicks on next it draws the lines and polygons in the correct area and place
PLEASE HELP
the code is as follows
MAIN CLASS
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import javax.swing.*;
public class TestProof {
    TestControl control;          // the controls for the visual proof
    TestView view;          // the drawing area to display proof
    // called upon class creation
    public TestProof() {
        view = new TestView();
view.setBackground(Color.WHITE);
        control = new TestControl(view);
        Frame f = new Frame("Pythagoras");
        f.add(view,"Center");
        f.add(control,"South");
        f.setSize(600,600);
        f.setBackground(Color.lightGray);
        f.addMouseMotionListener(
        new MouseMotionListener() { //anonymous inner class
            //handle mouse drag event
            public void mouseMoved(MouseEvent e) {
                System.out.println("Mouse " + e.getX() +"," + e.getY());
            public void mouseDragged(MouseEvent e) {
                System.out.println("Draggg: x=" + e.getX() + "; y=" + e.getY());
        JMenu File = new JMenu("File");
        JMenuItem Exit = new JMenuItem("Exit");
        Exit.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                ExitActionPerformed(evt);
        JMenuBar menuBar = new JMenuBar();
        menuBar.add(File);
   File.add(Exit);
        f.add(menuBar,"North");
        f.show();
    private JMenuBar getMenuBar() {
        JMenu File = new JMenu("File");
        JMenuItem Exit = new JMenuItem("Exit");
        Exit.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                ExitActionPerformed(evt);
        JMenuBar menuBar = new JMenuBar();
        menuBar.add(File);
             File.add(Exit);
        return menuBar;
    private void ExitActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
        System.exit(0);
    // for standalone use
    public static void main(String args[]) {
TestProof TP = new TestProof();
}Test VIEW
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.text.*;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class TestView extends Canvas {
    int TRANSLUCENT = 1;
    int sequence;          // sequencer that determines what should be drawn
    // notes matter
    int noteX = 100;     // note coordinates
    int noteY = 60;
    int fontSize = 11;     // font size
    int lineSpacing     // space between two consecutive lines
    = fontSize + 2;
    Font noteFaceFont;     // font used to display notes
    // objects matter
    Polygon tri;          // right-angled triangle with sides A, B, and C
    Polygon tri1;
    Polygon sqrA;          // square with side of length A
    Polygon sqrB;          // square with side of length B
    Polygon sqrC;          // square with side of length C
    Polygon parA;          // parallelogram of base A and height A
    Polygon parB;          // parallelogram of base B and height B
    Polygon poly1;
    Polygon poly2;
    Polygon poly3;
    Polygon poly4;
    Polygon poly5;
    Polygon poly6;
    int X0 = 350;          // coordinates of triangle
    int Y0 = 350;
    int A = 90;//60;          // triangle size
    int B = 120;//80;
    int C = 150;//100;
    //CORDS of 2nd triangle
    int X1 = 350;
    int Y1 = 500;
    // notes: three lines per note
    String notes[] = {
        // note 0
        // note 1
        // note 2
        // note 3
        // note 4
        // note 5
        // note 6
        // note 7
        // note 8
        // note 9
        // note 10
        // note 11
        // note 12
        // note 13
        // note 14
    // constructor
    public TestView() {
        addMouseMotionListener(
        new MouseMotionListener() { //anonymous inner class
            //handle mouse drag event
            public void mouseMoved(MouseEvent e) {
                System.out.println("Mouse " + e.getX() +"," + e.getY());
            public void mouseDragged(MouseEvent e) {
                System.out.println("Draggg: x=" + e.getX() + "; y=" + e.getY());
        // set font
        noteFaceFont = new Font("TimesRoman", Font.PLAIN, fontSize);
        // (coordinates specified w.r.t. to P0, unless otherwise specified)
        // create the triangle
        tri = new Polygon();
        tri.addPoint(0, 0);                    // add P0 coordinate
        tri.addPoint(A*A/C, -A*B/C);          // add A3 coordinate
        tri.addPoint(C, 0);                    // add C1 coordinate
        tri.translate(X0, Y0);               // place triangle
        tri1 = new Polygon();
        tri1.addPoint(0,0);                    // add P0 coordinate
        tri1.addPoint(A*A/C +38, +A*B/C);          // add A3 coordinate
        tri1.addPoint(C, 0);                    // add C1 coordinate
        tri1.translate(X1, Y1);
        // create square of side A
        sqrA = new Polygon();
        sqrA.addPoint(0, 0);               // add P0 coordinate
        sqrA.addPoint(-A*B/C, -A*A/C);          // add A1 coordinate
        sqrA.addPoint(-A*(B-A)/C, -A*(A+B)/C);     // add A2 coordinate
        sqrA.addPoint(A*A/C, -A*B/C);          // add A3 coordinate
        sqrA.translate(X0, Y0);               // place square
        // create square of side B
        // warning: the coordinate of this object are specified relative to C1
        sqrB = new Polygon();
        sqrB.addPoint(0, 0);               // add C1 coordinate
        sqrB.addPoint(B*A/C, -B*B/C);          // add B1 coordinate
        sqrB.addPoint(B*(A-B)/C, -B*(A+B)/C);     // add B2 coordinate
        sqrB.addPoint(-B*B/C, -B*A/C);          // add A3 coordinate
        sqrB.translate(X0 + C, Y0);               // place square
        // create square of side C
        sqrC = new Polygon();
        sqrC.addPoint(0, 0);               // add P0 coordinate
        sqrC.addPoint(C, 0);               // add C1 coordinate
        sqrC.addPoint(C, C);               // add C2 coordinate
        sqrC.addPoint(0, C);               // add C3 coordinate
        sqrC.translate(X0, Y0);               // place square
        poly1 = new Polygon();
        poly1.addPoint(405,279);
        poly1.addPoint(413,350);
        poly1.addPoint(432,500);
        poly1.addPoint(442,571);
        poly1.addPoint(500,500);
        poly1.addPoint(500,350);
        poly2 = new Polygon();
        poly2.addPoint(279,297);
        poly2.addPoint(404,280);
        poly2.addPoint(571,254);
        poly2.addPoint(500,350);
        poly2.addPoint(350,350);
        //Polygon 3
        poly3 = new Polygon();
        poly3.addPoint(404,280);
        poly3.addPoint(350,350);
        poly3.addPoint(414,350);
        poly4 = new Polygon();
        poly4.addPoint(350,350);
        poly4.addPoint(350,500);
        poly4.addPoint(442,572);
        poly4.addPoint(433,500);
        poly4.addPoint(414,350);
        poly5 = new Polygon();
        poly5.addPoint(476,183);
        poly5.addPoint(332,225);
        poly5.addPoint(278,295);
        poly5.addPoint(404,279);
        poly5.addPoint(571,254);
        poly6= new Polygon();
        poly6.addPoint(405,278);
        poly6.addPoint(332,224);
        poly6.addPoint(476,182);
        // create parallelogram of height A
        parA = new Polygon();
        parA.addPoint(0, 0);               // add P0 coordinate
        parA.addPoint(0, C);               // add C3 coordinate
        parA.addPoint(A*A/C, C - A*B/C);          // add Q0 coordinate
        parA.addPoint(A*A/C, -A*B/C);          // add A3 coordinate
        parA.translate(X0,Y0);               // place parallelogram
        // create parallelogram of height B
        // warning: the coordinate of this object are specified from C1
        parB = new Polygon();
        parB.addPoint(0, 0);               // add C1 coordinate
        parB.addPoint(-B*B/C, -B*A/C);          // add A3 coordinate
        parB.addPoint(A*A/C - C, C - A*B/C);     // add Q0 coordinate
        parB.addPoint(0, C);               // add C2 coordinate
        parB.translate(X0 + C, Y0);
        // place parallelogram
    // depending on the sequence number we draw certain objects
    public void paint(Graphics gfx) {
        super.paint(gfx);
        Graphics2D g = (Graphics2D) gfx;
        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
        RenderingHints.VALUE_ANTIALIAS_ON);
        // text first, then objects (and animation)
        // we always output some notes
        g.drawString(notes[3*sequence], noteX, noteY);
        g.drawString(notes[3*sequence + 1], noteX, noteY + lineSpacing);
        g.drawString(notes[3*sequence + 2], noteX, noteY + 2*lineSpacing);
        // the object are drawn in an order so that they are properly overlapped
        if(sequence == 13) {
            g.setColor(Color.green);
            g.fillPolygon(poly1);
            g.fillPolygon(poly2);
            g.fillPolygon(poly3);
            g.fillPolygon(poly4);
            g.fillPolygon(poly5);
            g.setColor(Color.RED);
            g.setColor(Color.GREEN);
            g.drawLine(413,351,433,499);
            g.setColor(Color.white);
            g.fillPolygon(tri);
            g.fillPolygon(tri1);
            g.fillPolygon(poly6);
        if(sequence == 12 ) {
            g.setColor(Color.green);
            g.fillPolygon(poly1);
            g.fillPolygon(poly2);
            g.fillPolygon(poly3);
            g.fillPolygon(poly4);
            g.fillPolygon(poly5);
            g.setColor(Color.BLACK);
        if(sequence == 11){
            g.setColor(Color.green);
            g.fillPolygon(poly1);
            g.fillPolygon(poly3);
            g.fillPolygon(poly4);
            g.setColor(Color.BLACK);
        if(sequence == 8 ){
            g.setColor(Color.green);
            g.fillPolygon(poly5);
            g.setColor(Color.MAGENTA);
            g.drawString("E",578,254);
            g.drawString("D",268,302);
            g.setColor(Color.black);
            g.drawArc(250,150,350,250,320,65);
        else if (sequence == 9 ){
            g.setColor(Color.green);
            g.fillPolygon(poly2);
            g.setColor(Color.MAGENTA);
            g.drawString("E",578,254);
            g.drawString("D",268,302);
            g.setColor(Color.black);
            g.drawArc(250,150,350,250,320,65);
        if( sequence == 10){
            g.setColor(Color.green);
            g.fillPolygon(poly2);
            g.fillPolygon(poly5);
            g.setColor(Color.black);
            g.setColor(Color.MAGENTA);
            g.drawString("E",578,254);
            g.drawString("D",268,302);
            g.setColor(Color.black);
            g.drawArc(250,150,350,250,320,65);
        if(sequence == 7){
            g.setColor(Color.green);
            g.fillPolygon(poly2);
            g.setColor(Color.MAGENTA);
            g.drawString("E",578,254);
            g.drawString("D",268,302);
            g.setColor(Color.black);
        if(sequence == 6){
            g.setColor(Color.yellow);
            g.fillPolygon(poly2);
            g.setColor(Color.green);
            g.fillPolygon(poly3);
            g.setColor(Color.blue);
            g.fillPolygon(poly4);
            g.setColor(Color.black);
            g.drawArc(250,175,350,275,300,65);
            //g.drawArc(250,150,350,250,320,65);
            g.drawLine( 606,309,599,299);
            g.drawLine(592,313, 599,299);
            g.drawString("+90 degrees",605,378);
        if (sequence == 5 ) {
            g.setColor(Color.yellow);
            g.fillPolygon(poly2);
            g.setColor(Color.black);
        if (sequence == 4) {
            g.setColor(Color.YELLOW);
            g.fillPolygon(poly1);
            g.setColor(Color.black);
            g.drawArc(319,310,250,195,89,-35);
            g.drawLine(499,319, 492,312);
            g.drawLine(499,319, 492,325);
            g.drawArc(200,180, 233,238,-120,-60);
            g.drawLine(200,298, 208,309);
            g.drawLine(200,298, 194,313);
            g.drawString("-90 degrees",227,347);
        if (sequence >= 3) {
            g.drawLine(404,279,442,572);
        // draw the squares
        if (sequence >= 2) {
            g.drawLine(278,296,572,254);
        // draw the squares
        if (sequence >= 1) {
            g.drawLine(333,224,476,182);
            g.drawPolygon(tri1);
        // always draw the triangle
        g.drawPolygon(tri);
        g.drawPolygon(sqrA);
        g.drawPolygon(sqrB);
        g.drawPolygon(sqrC);
        g.setColor(Color.MAGENTA);
        g.drawString("C", X0 + C/2 - fontSize/2, Y0 + lineSpacing);
        g.drawString("A",
        X0 + A*A/(2*C) - fontSize*A/B/2,
        Y0 - A*B/(2*C) - lineSpacing*A/B);
        g.drawString("B",
        X0 + C - B*B/(2*C) - fontSize*A/B/2,// the last "-" isn't log.
        Y0 - B*A/(2*C) - lineSpacing*A/B);
    public void redraw(int sequence) {
        this.sequence = sequence;
        repaint();
}TEST CONTROL
* TestControl.java
* Created on 28 February 2005, 11:16
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import javax.swing.JFrame;
* @author Kripa Bhojwani
public class TestControl extends Panel implements ActionListener {
TestView view;
int sequence;                    // event sequence
// constructor
public TestControl(TestView view) {
    Button b = null;
    Label label = new Label("A^2 ");
    this.view = view;          // initialize drawble area
    sequence = 0;               // initialize sequence
    b = new Button("Prev");
    b.addActionListener(this);
    add(b);
    b = new Button("Next");
    b.addActionListener(this);
    add(b);
    add(label);
// exported method
public void actionPerformed(ActionEvent ev) {
    String label = ev.getActionCommand();
    if (label.equals("Prev")) {
      if (sequence >0) {
     --sequence;
    else {
      if (sequence < 15) {
     ++sequence;
    this.setEnabled(false);          // disable the controls
    view.redraw(sequence);
    this.setEnabled(true);          // enable the controls
}Please help --- really need to sort this out...
THANKS

One of the problems you face is that it is hard to recognise which parts of your code are drawing the triangle. This is because you are writing code in a procedural way rather than an object oriented way.
In object oriented code you would have a triangle object that could draw itself. You would create the triangle object by specifying its sizes and angles in some way. Then it should be easy to change the triangles sizes and angles and ask all the drawn objects to redraw themselves.

Possibility of drawing numbers on java bouncing balls?

Can anyone show me how to put numbers on these moving balls in my code. I need the numbers 1-60 on them. I have two sets the red and white. Here is my code. Any help is appreciated. I am trying to write a program to represent the powerball.
import java.awt.*;
import java.applet.*;
import java.util.*;
import javax.swing.*;
import java.awt.Rectangle;
class CollideBall{
int width, height;
public static final int diameter=20;
//coordinates and value of increment
double x, y, xinc, yinc, coll_x, coll_y;
boolean collide;
Color color;
Graphics g;
Rectangle r;
//the constructor
public CollideBall(int w, int h, int x, int y, double xinc, double yinc, Color c){
width=w;
height=h;
this.x=x;
this.y=y;
this.xinc=xinc;
this.yinc=yinc;
color=c;
r=new Rectangle(150,80,130,90);
public double getCenterX() {return x+diameter/2;}
public double getCenterY() {return y+diameter/2;}
public void alterRect(int x, int y, int w, int h){
r.setLocation(x,y);
r.setSize(w,h);
public void move(){
if (collide){
double xvect=coll_x-getCenterX();
double yvect=coll_y-getCenterY();
if((xinc>0 && xvect>0) || (xinc<0 && xvect<0))
xinc=-xinc;
if((yinc>0 && yvect>0) || (yinc<0 && yvect<0))
yinc=-yinc;
collide=false;
x+=xinc;
y+=yinc;
//when the ball bumps against a boundary, it bounces off
//ball width is 6 so if the ball becomes less then 6 it is touching the frame
//if ball is greater than the entire width-the diameter of the rectangle, then the ball is just touching the frame of the rectangle and must switch to negative to go in opposit direction
if(x<6 || x>width-diameter){
xinc=-xinc;
x+=xinc;
//same thing as about just about the Y-axis instead of the x-axis
if(y<6 || y>height-diameter){
yinc=-yinc;
y+=yinc;
public void hit(CollideBall b){
if(!collide){
coll_x=b.getCenterX();
coll_y=b.getCenterY();
collide=true;
public void paint(Graphics gr){
g=gr;
g.setColor(color);
//the coordinates in fillOval have to be int, so we cast
//explicitly from double to int
g.fillOval((int)x,(int)y,diameter,diameter);
//Draws half white and half dark gray arc around the balls to give light and shadow effect
g.setColor(Color.white);
g.drawArc((int)x,(int)y,diameter,diameter,45,180);
g.setColor(Color.darkGray);
g.drawArc((int)x,(int)y,diameter,diameter,225,180);
public class BouncingBalls extends Applet implements Runnable {
Thread runner;
Image Buffer;
Graphics gBuffer;
CollideBall ball[];
//Obstacle o;
//how many balls?
static final int MAX=60;
boolean intro=true,drag,shiftW,shiftN,shiftE,shiftS;
boolean shiftNW,shiftSW,shiftNE,shiftSE;
int xtemp,ytemp,startx,starty;
int west, north, east, south;
public void init() {
Buffer=createImage(getSize().width,getSize().height);
gBuffer=Buffer.getGraphics();
ball=new CollideBall[MAX];
int w=getSize().width-5;
int h=getSize().height-5;
//our balls have different start coordinates, increment values
//(speed, direction) and colors
for (int i = 0;i<30;i++){
ball=new CollideBall(w,h,48+i,500+i,1.5,2.0,Color.white);
ball[i+30]=new CollideBall(w,h,890+i,200+i,1.5,2.0,Color.red);
public void start(){
if (runner == null) {
runner = new Thread (this);
runner.start();
/* public void stop(){
if (runner != null) {
runner.stop();
runner = null;
public void run(){
while(true) {
Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
try {runner.sleep(15);}
catch (Exception e) { }
//move our balls around
for(int i=0;i<MAX;i++){
ball[i].move();
handleCollision();
repaint();
boolean collide(CollideBall b1, CollideBall b2){
double wx=b1.getCenterX()-b2.getCenterX();
double wy=b1.getCenterY()-b2.getCenterY();
//we calculate the distance between the centers two
//colliding balls (theorem of Pythagoras)
double distance=Math.sqrt(wx*wx+wy*wy);
if(distance<b1.diameter)
return true;
return false;
private void handleCollision(){
//we iterate through all the balls, checking for collision
for(int i=0;i<MAX;i++)
for(int j=0;j<MAX;j++){
if(i!=j){
if(collide(ball[i], ball[j])){
ball[i].hit(ball[j]);
ball[j].hit(ball[i]);
public void update(Graphics g){
paint(g);
public void paint(Graphics g) {
gBuffer.setColor(Color.lightGray);
gBuffer.fillRect(0,0,getSize().width,getSize().height);
gBuffer.draw3DRect(5,5,getSize().width-10,getSize().height-10,false);
//paint our balls
for(int i=0;i<MAX;i++)
ball[i].paint(gBuffer);
g.drawImage (Buffer,0,0, this);
Thanks again

this.user wrote:
JakeG27 post your code within the code tab it will be more clear.
You can do this by clicking on CODE when you do this will appear { code} { code} post your code inbetween those to tags.
ie
{ code} code... { code}
and it will look like this
code
This must be the first sensible post you've ever made. At least you're able to copy someone else's response and pretend you know something.

Alarm status drawing iow: recolour JInternalFrame components

Greetings,
Please have a look at this picture. It's a low res snapshot of
a few quite complicated components. Most of the functionality isn't
visible nor relevant in the example. What you're looking at is a real time
process of some sort. Things can go wrong in that process. In a previous
version of my views I'd turn the background colour of some components
red/yellow/green according to the 'alarm status' of the process. One of
my customers suggested the idea of turning everything red/yellow/green
inside those JInternalFrames (that's what you're looking at in the example).
Of course one fool can ask more than a dozen of wise men can answer
and I am not that wise, so my question is: how would one change the
colour of all components that are part of a JInternalFrame (or any
other container) such that the colour wouldn't be 100% opague but
still visible by itself and still showing the information originally present
in each individual component. iow, as if a transparent monochrome
filter were positioned in front of that entire JContainer.
In a naive way I like the idea; if the idea turns out to be too complicated
to realize I'd be happy with visual alternatives also. (such as big arrows
pointing to the JContainer where the alarm happened).
Note that these appliations run in a 'factory' environment where people
either hardly watch the screens or they watch them at quite a great
distance. The changing colours should just attract their attention so they
will walk/run/drive/ride to the screens for a second inspection.
Any ideas are appreciated.
kind regards,
Jos

Not sure I understand the question, but I keyed in on:
as if a transparent monochrome filter were positioned in front of that entire JContainer.So maybe you could use a GlassPane:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class GlassPaneTest extends JFrame
    public GlassPaneTest()
        final JComponent glassPane = new JComponent()
            public void paintComponent(Graphics g)
                g.setColor( getBackground() );
                g.fillRect(0, 0, getSize().width, getSize().height);
        glassPane.setOpaque( false );
        glassPane.setBackground( new Color(240, 20, 20, 100) );
        setGlassPane( glassPane );
        glassPane.addKeyListener( new KeyAdapter()
            public void keyPressed(KeyEvent e)
                e.consume();
        glassPane.addMouseListener( new MouseAdapter()
            public void mousePressed(MouseEvent e)
                e.consume();
        final JButton button = new JButton( "Click Me" );
        button.setMnemonic('c');
        button.addActionListener( new ActionListener()
            public void actionPerformed(ActionEvent e)
                   glassPane.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
                   glassPane.setVisible( true );
                   glassPane.requestFocus();
                   Thread thread = new Thread()
                        public void run()
                            try { this.sleep(5000); }
                            catch (InterruptedException ie) {}
                             glassPane.setVisible( false );
                             glassPane.setCursor(null);
                thread.start();
        getContentPane().add(new JLabel("NORTH"), BorderLayout.NORTH );
        getContentPane().add( button );
        getContentPane().add(new JTextField(), BorderLayout.SOUTH);
    public static void main(String[] args)
        GlassPaneTest frame = new GlassPaneTest();
        frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
        frame.setSize(300, 300);
        frame.setLocationRelativeTo( null );
        frame.setVisible(true);
}The Swing tutorial on [url http://java.sun.com/docs/books/tutorial/uiswing/components/rootpane.html]How to Use Glass Panes shows how you can also do a simple drawing (your arrow?) on the glass pane.

Looking for a high-res drawing app for the iPad

I've tried a few of the available iPad drawing apps like Sketchbook Pro and Brushes. It's a little hard to tell, because documentation tends to be short on details, but it appears that most of them (with the exception of Brushes) only let you work and export images at 1024 by 768 resolution. That isn't really high enough resolution for professional work.
Brushes is the only exception I've found. You work on the iPad in Brushes at 1024 by 768, but they have this OS X app that can convert your exported images to a higher res.
To me that's crazy awkward and time-consuming, and I think Brushes is OK as a drawing app, but not necessarily what I'm looking for.
Can anyone give me some better insight into the matter?
Is there some underlying technical reason that all of these apps have a hard limit of 1024 by 768 resolution?
Is there an app other than Brushes that can produce pro-level (high resolution) image files on the iPad?
Thanks,
JS

Yubz Magnum really has great sound. They come in four colors too.
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CS5 or Elements for Drawing?

hello everyone. I know this doesn't sound original but I have yet to find an answer so I came here. I am hoping to get a Wacom Bamboo Fun tablet soon and it includes Adobe Elements 8. I am an artist and browsing around places like DeviantArt i find that most digital artists use the program CS5 or something like that. So here's my question: is CS5 or Elements better for drawing? I'm seriously thinking about getting CS5 but i don't want to waste my money if Elements is just as good. Please help me out!!

Elements is more limited in how to adjust the colors to black-and-white.
Lightroom has more sophisticated adjustments. These adjustments are the same as in the Camera Raw plug-in for Photoshop, but absent in the Camera Raw plug-in for Elements. The adjustments allow you to enhance the contrast and brightness of the gray-level for narrow ranges of original colors instead of a simple removal of color with a default color-balance or clicking on a preset that Elements has.
Here is a very verbose video introduction to the LR B/W conversion on an example photo, viewed best in full-screen HD:
http://www.luminous-landscape.com/tutorials/bw_workflow_in_lightroom.shtml
Here is a step-by-step example with screenshots and description, from 2008, but the adjustments still mostly apply, except the vignetting you’d use wouldn’t be lens-related, it’d be the Post-Crop Vignetting in the Effects section that didn’t exist back in 2008:
http://layersmagazine.com/create-stunning-black-and-white-images-in-lightroom.html
These were just the first and third links that showed up after Googling for Lightroom Black and White.
BTW, I am a photo-hobbyist and use Lightroom every day, so it’s not just for professionals making money off their photos that need something fast. For me it is more about seriousness and perfection and freedom.

Error message (Because a USB device was drawing too much power)

Hi Everyone,
Bought recently a new macbook pro 13 inch with Retina display with 120 GB flash drive.
Connected a non-apple CD drive to my macbook and after that started receiving this message: "Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled."
initially I was receiving this message after I switch on my macbook but now after every 30 seconds this message pops up although I never connected anything to my macbook through its USB ports.
Will highly appreciate for your help on how to get rid of this problem.
Regards
Homayun

Try resetting the SMC
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

MouseOver in Drawing

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