Project SAIL: Student Authored Interactive Lessons
Java code

Application.java
-------------------------------------------------------------------
/*
* Created on Mar 22, 2005
*/

/**
* @author Andrew Owens
*/

import javax.swing.JFrame;
import java.awt.BorderLayout;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.util.*;
/**
* Application Creates and initializes each component of the system.
*/
public class Application extends JFrame {

public static void main( String[] args ) {
new Application( null );
}


public Application( SailApplet sailApplet ) {
applet = sailApplet;
//initApp();
initGUI();
initHQ();
isInitialized = true;

updateAll();
repaint();
}

private boolean isInitialized;

private JApplet applet;

private Container cp;

/////////////////////////////////////////////
// Mode Management
/////////////////////////////////////////////

public void initInstructionMode( ) {
exitCurrentMode();
mode = new InstructionMode( this, cp );
refreshMode();
}


public void initTestMode() {
exitCurrentMode();
mode = new TestMode( this );
refreshMode();
}


public void initExplorationMode() {
exitCurrentMode();
mode = new ExplorationMode( this, cp );
refreshMode();
}


public void initHQ() {
exitCurrentMode();
mode = new SelectionMode( this, cp );
refreshMode();
}


private void exitCurrentMode() {
cp.removeAll();

//cp.add( new JLabel("asdf"));

}


// fixes that repainting bug somehow...
private void refreshMode() {
if ( applet == null ) {
setVisible( true );
}
else {
}

}
/**
* Initialize the application's GUI/frame
*/
private Container initGUI() {
if ( applet != null ) {
cp = applet.getContentPane();
}
else {
setDefaultLookAndFeelDecorated( true );
setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
setTitle( APP_TITLE );
setSize( APP_WIDTH, APP_HEIGHT );
setResizable( IS_RESIZABLE );
cp = getContentPane();
}

if ( applet == null ) {
setVisible( true );
}

return cp;
}


/*
* private void onTimer() { updateAll(); }
*/

public void updateAll() {
if ( isInitialized ) {
mode.updateAll();
}
}


public class TestMode implements Mode {
public TestMode( Application app ) {
testPanel = new TestPanel( app );
cp.add( testPanel );
}


public void updateAll() {
}

TestPanel testPanel;
}

public class ExplorationMode implements Mode {
public ExplorationMode( Application app, Container cp ) {
add( new ExplorationScreen( app, cp ) );
}
public void updateAll() {

}
}
public class InstructionMode implements Mode, GraphCoordinator {
public InstructionMode( Application app, Container cp ) {
Point bottomLeft = new Point( -100, -100 );
Point upperRight = new Point( getWidth() + bottomLeft.getX() - 205, getHeight() );

configManager = new ConfigManager( this );
pointTable = new PointTable( this );
statManager = new StatManager( this, pointTable );
grapher = new Grapher( configManager, statManager, pointTable, bottomLeft, upperRight );
panelSeparator = new PanelSeparator( app, configManager, statManager, pointTable );

cp.add( panelSeparator, BorderLayout.EAST );
cp.add( grapher.getGraph() );
cp.addComponentListener( new ResizeListener() );

isInitialized = true;
}


public void updateAll() {
updateGraph();
}

public void updateGraph() {
if ( isInitialized ) {
grapher.updateGraph( true );
panelSeparator.updatePanels();
pointTable.updateState();
}
}

private boolean isInitialized;

private ConfigManager configManager;

private StatManager statManager;

private Grapher grapher;

private PanelSeparator panelSeparator;

private PointTable pointTable;

public class ResizeListener implements ComponentListener {
public void componentShown( ComponentEvent e ) {
updateAll();
}


public void componentMoved( ComponentEvent e ) {

}


public void componentResized( ComponentEvent e ) {
grapher.resizeGraph( new Point( getWidth() - PANEL_WIDTH, getHeight() ) );
}


public void componentHidden( ComponentEvent e ) {

}
}
}

public class SelectionMode implements Mode {
public SelectionMode( Application app, Container cp ) {
cp.add( new SelectionScreen( app, cp ) );
}


public void updateAll() {

}
}

// mode enumerations
private static final int MODE_INVALID_FIRST = 0;

private static final int MODE_EXPLORATION = 1;

private static final int MODE_TEST = 2;

private static final int MODE_HOMEWORK = 3;

private static final int MODE_INSTRUCTION = 4;

private static final int MODE_LAST = 4;

private Mode mode;

// are we selecting a mode?
private static final String APP_TITLE = "Linear Regression";

private static final int APP_WIDTH = 780;

private static final int APP_HEIGHT = 500;

private static final boolean IS_RESIZABLE = true;

private static final int TIMER_DELAY = 100;

private static final int PANEL_WIDTH = 250;

}


ColorSchemeManager.java
-------------------------------------------------------------------
/*
* Created on Apr 5, 2005
*/

/**
* @author Andrew Owens
*/


/**
* ColorSchemeManager
* Provides centralized, static access for
* color scheme
*/

import java.awt.Color;

public class ColorSchemeManager {
public static final Color REGRESSION_LINE = Color.BLUE;

public static final Color CUSTOM_REGRESSION = Color.RED;

public static final Color GHOST_REGRESSION_LINE = new Color( 0, 0, 200, 100 );

public static final Color AXIS = new Color( 50, 50, 50, 100 );

public static final Color GRID = new Color( 200, 200, 200, 100 );

public static final Color DEVATION = new Color( 0, 128, 0 );

public static final Color RESIDUAL = new Color( 0, 128, 0 );

public static final Color GRAPH_TEXT = new Color( 0, 0, 0 );
//public static final Color DEVATION_SQUARE =

//public static final Color RESIDUAL_SQUARE =



}


ConfigEditor.java
-------------------------------------------------------------------
/*
* Created on Mar 23, 2005
*/

/**
* @author Andrew Owens
*/

import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JCheckBox;
import javax.swing.BoxLayout;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.Iterator;

public class ConfigEditor extends Panel implements ItemListener {
public ConfigEditor( ConfigManager newConfigManager ) {
settingConversions = new HashMap();
configManager = newConfigManager;
checkBoxes = new ArrayList();

initGUI();
loadDefaultSettings();
}


public String getName() {
return PANEL_NAME;
}


private void initGUI() {
setLayout( new BoxLayout( this, BoxLayout.Y_AXIS ) );

// the user will probably never change these
/*
for ( int i = 0; i < STATPANEL_SETTINGS.length; i++ ) {
// get the text of the checkbox
String checkBoxText = STATPANEL_SETTINGS[ i ][ 0 ];

// get the text of the corresponding setting-key
String settingKey = STATPANEL_SETTINGS[ i ][ 1 ];

// make the CheckBox
JCheckBox checkBox = new JCheckBox( checkBoxText );

checkBox.addItemListener( this );

// add the checkBoxTest (as the key) and the settingKey (as the
// value)
// in a hash map so we can convert them later
settingConversions.put( checkBoxText, settingKey );

configManager.setSetting( settingKey, new Boolean( false ) );

checkBoxes.add( checkBox );

// add the checkbox to the panel
add( checkBox );
}

add( new JSeparator() );
*/
for ( int i = 0; i < GRAPHER_SETTINGS.length; i++ ) {
// get the text of the checkbox
String checkBoxText = GRAPHER_SETTINGS[ i ][ 0 ];

// get the text of the corresponding setting-key
String settingKey = GRAPHER_SETTINGS[ i ][ 1 ];

// make the CheckBox
JCheckBox checkBox = new JCheckBox( checkBoxText );

checkBox.addItemListener( this );

// add the checkBoxTest (as the key) and the settingKey (as the
// value)
// in a hash map so we can convert them later
settingConversions.put( checkBoxText, settingKey );

configManager.setSetting( settingKey, new Boolean( false ) );

checkBoxes.add( checkBox );

// add the checkbox to the panel
add( checkBox );
}
}


public void updateContents() {
// there haven't been any modifications in the ConfigManager, so we'll update its
// state to reflect its un-updated status
configManager.updateState();

}


public void itemStateChanged( ItemEvent e ) {
// get the item that was changed
JCheckBox checkBoxSrc = (JCheckBox) e.getItemSelectable();

// find the check box's text
String selectedText = checkBoxSrc.getText();

// using this text, find the setting that the box corresponds to
String keyConversion = (String) settingConversions.get( selectedText );

// checkboxes can only change boolean values so we'll
// change this setting in the ConfigManager to the value in
// the box
configManager.setSetting( keyConversion, new Boolean( checkBoxSrc.isSelected() ) );
}


private void loadDefaultSettings() {
for ( int i = 0; i < DEFAULT_CHECKED_SETTINGS.length; i++ ) {
String settingKey = DEFAULT_CHECKED_SETTINGS[ i ];
configManager.setSetting( settingKey, new Boolean( true ) );

// go through each check box, if it matches this
// one, then check it
Iterator checkBoxIt = checkBoxes.iterator();

while ( checkBoxIt.hasNext() ) {
JCheckBox checkBox = (JCheckBox) checkBoxIt.next();

// get the text of the box
// so that we can convert it to
// its corresponding setting
String checkBoxText = checkBox.getText();

// convert the check box text to
// its corresponding setting
String settingKeyCheckBox = (String)settingConversions.get( checkBoxText );

if ( settingKey.equals( settingKeyCheckBox ) ) {
checkBox.setSelected( true );
}
}
}
}

private ConfigManager configManager;

private HashMap settingConversions;
/*
private static final String[][] STATPANEL_SETTINGS = {
// StatPanel options
{ "Show Equation", "ShowEquation" },
{ "Show SS_res", "ShowSSres" },
{ "Show SS_dev", "ShowSSdev" },
{ "Show r", "ShowR" },
{ "Show r²", "ShowRSquared" },
{ "Show x and y", "ShowXYBars" }};
*/
// Graph options
private static final String[][] GRAPHER_SETTINGS = {
{ "Plot ŷ", "PlotYHat" },
{ "Plot Residuals", "PlotResiduals" },
{ "Plot x and y", "PlotXYBars" },
{ "Plot Deviation Lines", "PlotDevLines" },
{ "Plot Squares of Residuals", "PlotResSquares" },
{ "Plot Squares of Deviations", "PlotDevSquares" }};
// TODO:
// Load the defaults from a file or something instead of relying on this
// hackish way of setting them
private static final String[] DEFAULT_CHECKED_SETTINGS = {
"ShowEquation",
"ShowSSres",
"ShowSSdev",
"ShowR",
"ShowRSquared",
"ShowXYBars",
"PlotYHat",
"PlotXYBars"};


private ArrayList checkBoxes;

private boolean isUpdated;

private static final String PANEL_NAME = "Settings";
}


ConfigManager.java
-------------------------------------------------------------------
/*
* Created on Mar 24, 2005
*/

/**
* @author Andrew Owens
*/

import java.util.HashMap;

public class ConfigManager {
ConfigManager(GraphCoordinator newCoordinator ) {
settings = new HashMap();
coordinator = newCoordinator;
}
public Setting querySetting( String key ) {
if ( settings.containsKey( key ) ) {
return new Setting( settings.get( key ) );
}
else {
//return new Setting();
// @hack
return new Setting( new Boolean( false ) );
}
}


public void setSetting( String key, Object value ) {
settings.put( key, value );
makeUpdated();
}


public boolean isUpdated() {
return isUpdated;
}


public void updateState() {
isUpdated = false;
}


private void makeUpdated() {
isUpdated = true;
coordinator.updateGraph();
}


private HashMap settings;

private boolean isUpdated;

private GraphCoordinator coordinator;
}


EmbeddedGraph.java
-------------------------------------------------------------------
/*
* Created on Apr 14, 2005
*/

/*
* @author Andrew Owens
*/

import javax.swing.*;

public class EmbeddedGraph extends JPanel implements GraphCoordinator {
public EmbeddedGraph( Point newBottomLeft, Point newUpperRight, Point[] points, String[] settings ) {
pointTable = new PointTable( this );
statManager = new StatManager( this, pointTable );
configManager = new ConfigManager( this );
grapher = new Grapher( configManager, statManager, pointTable, newBottomLeft, newUpperRight );

for ( int i = 0; i < points.length; i++ ) {
pointTable.addPoint( points[ i ] );
}

Boolean boolTrue = new Boolean( true );
for ( int i = 0; i < settings.length; i++ ) {
configManager.setSetting( settings[ i ], boolTrue );
}

add( grapher.getGraph() );

isInitialized = true;
}


public void updateGraph() {
if ( isInitialized ) {
grapher.updateGraph( false );
}
}


//
public Graph getGraph() {
return grapher.getGraph();
}


private boolean isInitialized;

private Grapher grapher;

private Graph graph;

private PointTable pointTable;

private StatManager statManager;

private ConfigManager configManager;
}


ExplorationScreen.java
-------------------------------------------------------------------
/*
* Created on Apr 11, 2005
*/

/**
* @author Andrew Owens
*/

import java.awt.*;
import javax.swing.*;
import java.util.*;

public class ExplorationScreen extends JPanel {
public ExplorationScreen( Application app, Container cp ) {
contentPane = cp;
application = app;

initGUI();
}


private void initGUI() {
String[] settings = { "PlotSSres" };
Point[] points = { new Point(50, 50 ), new Point(20, 40 ) };

EmbeddedGraph embeddedGraph = new EmbeddedGraph( new Point(-10, -10), new Point(500, 500), points, settings );

add( embeddedGraph.getGraph() );
}

private void loadStep( ExplorationStep step ) {

}


private ArrayList steps;

private Container contentPane;

private Application application;
}


ExplorationStep.java
-------------------------------------------------------------------
/*
* Created on Apr 11, 2005
*/

/*
* @author Andrew Owens
*/

public class ExplorationStep {
public ExplorationStep( String newDescription, int newEditableRow, int newEditableCol, int newLastsShowCol ) {

}

private String description;

private int editableRow;

private int editableCol;

private int lastShowCol;


}


Graph.java
-------------------------------------------------------------------
/*
* Created on Mar 23, 2005
*/

/**
* @author Andrew Owens
*/

import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.awt.Dimension;
import java.awt.Color;
import javax.swing.ImageIcon;
import javax.swing.JPanel;

public class Graph extends JPanel {

public Graph( Grapher newGrapher, Point newLowerLeft, Point newUpperRight ) {
lowerLeft = newLowerLeft;
upperRight = newUpperRight;
grapher = newGrapher;
initGUI();
loadImages();
firstPaint = true;
}


public void resizeGraph( Point newBottomLeft, Point newUpperRight ) {
lowerLeft = newBottomLeft;
upperRight = newUpperRight;
firstPaint = true;
}


public void paintComponent( Graphics g ) {
// TODO: I can only seem to create this backbuffer
// during the paint method and this seems
// to result in an occasional NullPointerException
// when it gets updated too fast

// if this is the first paint, then
// we need to create the back buffer
if ( !canDraw() ) {
setSize( (int) upperRight.getX(), (int) upperRight.getY() );
Dimension dim = getSize();
backBufferImage = (BufferedImage) createImage( (int) dim.getWidth(), (int) dim.getHeight() );
backBuffer = backBufferImage.getGraphics();
firstPaint = false;

// @hack
clear();
grapher.updateGraph();
}
g.drawImage( backBufferImage, 0, 0, null, null );

}


/*
* public void paint( Graphics g ) { /* // TODO: I can only seem to create
* this backbuffer // during the paint method and this seems // to result in
* an occasional NullPointerException // when it gets updated too fast
* // if this is the first paint, then // we need to create the back buffer
* if ( !canDraw() ) { setSize( (int)upperRight.getX(),
* (int)upperRight.getY() ); Dimension dim = getSize(); backBufferImage =
* (BufferedImage) createImage( (int) dim.getWidth(), (int) dim.getHeight() );
* backBuffer = backBufferImage.getGraphics(); clear(); firstPaint = false; } //
* if it isn't the first painting, then copy the // back buffer to the
* screen //else {
* // g.drawImage( backBufferImage, 0, 0, this ); //} g.drawImage(
* backBufferImage, 0, 0, 100, 100, 100, 100, 100, 100, null );
*
* paintComponent( g ); statDisplay.paintComponents( g ); }
*/

public void initGUI() {
addMouseListener( grapher.getMouseHandler() );
addMouseMotionListener( grapher.getMouseHandler() );
}


/**
* Clear the graph
*/
public void clear() {
if ( canDraw() ) {
setClearColor();
backBuffer.setColor( Color.WHITE );
// TODO: fix this to be
backBuffer.fillRect( 0, 0, getWidth(), getHeight() ); //(int)upperRight.getX(),
// (int)upperRight.getY()
// );
}
}


public void drawMessage( Point point, String message ) {
Point realCoords = toGraphCoords( point );
if ( canDraw() ) {
setColor( ColorSchemeManager.GRAPH_TEXT );
backBuffer.drawString( message, (int)realCoords.getX(), (int)realCoords.getY() );
}
}
/**
* Draws a line segment on the graph, converting its coordinates
*
* @param segment
* The line segment to render
*/
public void drawLineSegment( LineSegment segment, int lineWidth, Color color ) {
if ( canDraw() ) {
setColor( color );
Point start = new Point( segment.getP1() );
Point end = new Point( segment.getP2() );

start = toGraphCoords( start );
end = toGraphCoords( end );

if ( lineWidth == 1 ) {
backBuffer.drawLine( (int) start.getX(), (int) start.getY(), (int) end.getX(), (int) end.getY() );
}
else {
for ( int lineOffset = (int) ( -lineWidth * 0.5 ); lineOffset <= (int) ( lineWidth * 0.5 ); lineOffset++ ) {
backBuffer.drawLine( (int) start.getX() + lineOffset, (int) start.getY(), (int) end.getX()
+ lineOffset, (int) end.getY() );
}
}
}
}


public void drawLineSegment( LineSegment segment ) {
drawLineSegment( segment, 1, DEFAULT_LINESEGMENT_COLOR );
}


public void drawRect( Rectangle rect, Color color ) {
if ( canDraw() ) {
setColor( color );

Point coords = toGraphCoords( new Point( rect.getX(), rect.getY() ) );
Point dims = new Point( rect.getWidth(), rect.getHeight() );

backBuffer.fillRect( (int) coords.getX(), (int) coords.getY(), (int) dims.getX(), (int) dims.getY() );
}
}


/**
* Draws a point on the graph; converts the point's dimensions
*
* @param point
* The point to be rendered TODO: render an image of a point
* rather than a single pixel
*/
public void drawPoint( Point point, double scale ) {
if ( canDraw() ) {
setPointColor();
Point transformedPoint = toGraphCoords( point );

backBuffer.drawImage( pointImg.getImage(), (int) ( transformedPoint.getX() - POINT_RADIUS * scale ),
(int) ( transformedPoint.getY() - POINT_RADIUS * scale ),
(int) ( pointImg.getIconWidth() * scale ), (int) ( pointImg.getIconHeight() * scale ), null, null );
}
}


public void drawPoint( Point point ) {
drawPoint( point, 1 );
}


/**
* Converts the given point from its position on the plane to the
* corresponding location on the graph
*
* @param point
* The point to be converted
* @return The converted point
*/
public Point toGraphCoords( Point point ) {
double x = point.getX();
double y = point.getY();

// since (0, 0) refers to the upper-left corner
// we subtract the point's y from the graph's height
y = upperRight.getY() - y;

y = y + lowerLeft.getY();
x = x - lowerLeft.getX();

// find the scale factors by getting the coordinates' ratios
final double scaleX = ( upperRight.getX() - lowerLeft.getX() ) / upperRight.getX();
final double scaleY = ( upperRight.getY() - lowerLeft.getY() ) / upperRight.getY();

// mulitply both coordinates by the scale factors
//x = x * scaleX;
//y = y * scaleY;

return new Point( x, y );
}


/**
* Converts a point from swing's coordinate system to the corresponding
* point on a 2D plane
*
* @param point
* The point to be converted
* @return The converted point
*/
public Point toPlaneCoords( Point point ) {
double x = point.getX();
double y = point.getY();

y = upperRight.getY() - y + lowerLeft.getY();
;

x = x + lowerLeft.getX();

//y = -y;

final double scaleX = ( upperRight.getX() - lowerLeft.getX() ) / upperRight.getX();
final double scaleY = ( upperRight.getY() - lowerLeft.getY() ) / upperRight.getY();

// x = x / scaleX;
// y = y / scaleY;

return new Point( x, y );
}


public Point getBottomLeft() {
return lowerLeft;
}


public Point getTopRight() {
return upperRight;
}


public void addStatDisplay( JPanel panel ) {
statDisplay = panel;
}


private void loadImages() {
//pointImg = new ImageIcon( POINT_IMAGE_PATH );
pointImg = JavaPic_pointpng.getImageIcon();
}


private boolean canDraw() {
return !firstPaint;
}


// TODO: replace this with an image drawing routine
private void setPointColor() {
backBuffer.setColor( Color.RED );
}


private void setClearColor() {
backBuffer.setColor( Color.WHITE );
}


private void setLineSegmentColor() {
backBuffer.setColor( Color.BLUE );
}


private void setColor( Color color ) {
backBuffer.setColor( color );
}

private JPanel statDisplay;

private ImageIcon pointImg;

private Grapher grapher;

private boolean firstPaint;

private Graphics backBuffer;

private BufferedImage backBufferImage;

private Graphics graphics;

private Point lowerLeft;

private Point upperRight;

private static final Color DEFAULT_LINESEGMENT_COLOR = Color.BLUE;

//private static final String POINT_IMAGE_PATH = "Point.jpg";

private static final int POINT_RADIUS = 4;
}


GraphBars.java
-------------------------------------------------------------------
/*
* Created on Apr 1, 2005
*/

/**
* @author Steve Bradley
*
* Added description code - AO
*/
import java.awt.Color;

public class GraphBars extends GraphShape {
public GraphBars( double newXBar, double newYBar, Point lowerLeft, Point upperRight ) {
center = new Point( newXBar, newYBar );
xBar = new LineSegment( newXBar, lowerLeft.getY(), newXBar, upperRight.getX());
yBar = new LineSegment( lowerLeft.getX(), newYBar, upperRight.getX(), newYBar );
}

protected void onDraw(Grapher.GraphWriter graph) {
graph.drawLineSegment(xBar, barColor);
graph.drawLineSegment(yBar, barColor);
graph.drawPoint( center, .5 );
}


public boolean isMouseOver( Point mousePoint ) {
// return ( xBar.ptLineDist( mousePoint) <= MOUSEOVER_DISTANCE
// || yBar.ptLineDist( mousePoint ) <= MOUSEOVER_DISTANCE );
return false;
}


public double getDistance( Point point ) {
return Math.min( xBar.ptLineDist( point ), yBar.ptLineDist( point ) );
}

public String getDescription( StatManager statManager ) {
return "x = " + StatManager.roundStat( statManager.calcXBar(), 3 )
+ "
y = " + StatManager.roundStat( statManager.calcYBar(), 3 ) + "";
}

private Point center;

private static final Color barColor = new Color( 255, 128, 0, 128 );

private LineSegment xBar;

private LineSegment yBar;

private static final int MOUSEOVER_DISTANCE = 20;

}


GraphCoordinator.java
-------------------------------------------------------------------
/*
* Created on Apr 14, 2005
*/

/*
* @author Andrew Owens
*/

public interface GraphCoordinator {
public void updateGraph();
}


GraphDeviation.java
-------------------------------------------------------------------
/*
* Created on Mar 31, 2005
*/

/**
* @author Andrew Owens
*/

import java.awt.Color;

public class GraphDeviation extends GraphShape {
public GraphDeviation( Point point, double yBar ) {
initLine( point, yBar );
}


public String getDescription( StatManager statManager ) {
return "Length = "
+ StatManager.roundStat( deviationLine.getP1().distance( deviationLine.getP2() ), 3 )
+ "
}


private void initLine( Point point, double yBar ) {
deviationLine = new LineSegment( point, new Point( point.getX(), yBar ) );
}


protected void onDraw( Grapher.GraphWriter graph ) {
if ( isHighlighted ) {
graph.drawLineSegmentHighlighted( deviationLine, Color.RED );
}
else {
graph.drawLineSegment( deviationLine, Color.RED );
}
}


protected void onMouseOver( Point mousePoint ) {
isHighlighted = true;
}


protected void onMouseAway( Point mousePoint ) {
isHighlighted = false;
}

public boolean isMouseOver( Point mousePoint ) {
return ( deviationLine.ptLineDistSq( mousePoint ) <= HIGHLIGHT_DISTANCE );
}


public double getDistance( Point point ) {
return deviationLine.ptSegDist( point );
}


private boolean isHighlighted;

private static final int HIGHLIGHT_DISTANCE = 15;

private LineSegment deviationLine;


}


GraphDeviationSquare.java
-------------------------------------------------------------------
/*
* Created on Apr 3, 2005
*/

/**
* @author Andrew Owens
*/

public class GraphDeviationSquare extends GraphShape {

public GraphDeviationSquare( Point point, double yBar, int pointNum ) {
double sideLength = Math.abs( point.getY() - yBar );
Point upperLeft = new Point();

if ( point.getY() > yBar ) {
upperLeft.setLocation( point.getX(), point.getY() );
}
else {
upperLeft.setLocation( point.getX(), yBar );
}

devSquare = new Rectangle( upperLeft.getX(), upperLeft.getY(),
sideLength, sideLength );
pointNumber = pointNum;

center = new Point( devSquare.getCenterX(), devSquare.getCenterY() );
}


protected void onDraw( Grapher.GraphWriter graph ) {
if ( isHighlighted ) {
graph.drawDevSquareHighlighted( devSquare, pointNumber );
}
else {
graph.drawDevSquare( devSquare, pointNumber );
}
}


public boolean mouseOver( Point point ) {
isHighlighted = true;

return true;
}

public void mouseAway( Point point ) {
isHighlighted = false;
}

public boolean isMouseOver( Point mousePoint ) {
return ( mousePoint.getX() >= devSquare.getX()
&& mousePoint.getX() <= devSquare.getX() + devSquare.getWidth()
&& mousePoint.getY() >= devSquare.getY() - devSquare.getHeight()
&& mousePoint.getY() <= devSquare.getY() );
}

public double getDistance( Point mousePoint ) {
return center.distance( mousePoint.getX(), mousePoint.getY() );
}

public String getDescription( StatManager statManager ) {
return "Deviation Squared = "
+ StatManager.roundStat( devSquare.getWidth() * devSquare.getHeight(), 3 )
+ "";
}

private Rectangle devSquare;

private int pointNumber;

private Point center;

private boolean isHighlighted;
}


Grapher.java
-------------------------------------------------------------------
/*
* Created on Mar 24, 2005
*/

/**
* @author Andrew Owens
*
*/

import java.util.AbstractCollection;
import java.util.Iterator;
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.util.ArrayList;

public class Grapher {
public Grapher( ConfigManager newConfigManager, StatManager newStatManager, PointTable newPointTable,
Point newBottomLeft, Point newUpperRight) {
bottomLeft = newBottomLeft;
upperRight = newUpperRight;
mouseHandler = new MouseHandler();
pointTable = newPointTable;
configManager = newConfigManager;
graphWriter = new GraphWriter();
graphShapes = new ArrayList();
graph = new Graph( this, bottomLeft, upperRight );
statManager = newStatManager;

useBestFitLine = true;
graph.clear();
updateGraph( false );

}


public void updateGraph() {
// @hack, just tell it to reload
updateGraph( true );
}
public void updateGraph( boolean reload ) {
graph.clear();

if ( useBestFitLine ) {
statManager.useBestFitRegressionLine();
}

if ( reload ) {
if ( statManager.tableChanged()
|| configManager.isUpdated() ) {
clearGraphShapes();
loadGraphShapes();
}
}

drawGraphShapes();

if ( statManager.getPointList().size() == 0 ) {
graphWriter.writeMessage( INIT_MESSAGE_POSITION,
INIT_MESSAGE );
graphWriter.writeMessage( INIT_MESSAGE_DRAG_POSITION,
INIT_MESSAGE_DRAG );
}
graph.repaint();
}


public Graph getGraph() {
return graph;
}


public MouseHandler getMouseHandler() {
return mouseHandler;
}


public void resizeGraph( Point newUpperRight ) {
upperRight.setLocation( newUpperRight.getX(), newUpperRight.getY() );
graph.resizeGraph( bottomLeft, upperRight );
updateGraph( true );
}


public void useCustomLine() {
useBestFitLine = false;
}


public void useBestFitLine() {
useBestFitLine = true;
}



public Point getBottomLeft() {
return bottomLeft;
}


public Point getUpperRight() {
return upperRight;
}

private void loadGraphShapes() {
AbstractCollection collection = statManager.getPointList();
Iterator it = collection.iterator();

Line regressionLine = statManager.calcRegressionLine();

boolean showResiduals = configManager.querySetting( "PlotResiduals" ).booleanValue();
boolean showDeviations = configManager.querySetting( "PlotDevLines" ).booleanValue();
boolean showResSquares = configManager.querySetting( "PlotResSquares" ).booleanValue();
boolean showXYBars = configManager.querySetting( "PlotXYBars" ).booleanValue();
boolean showYBar = configManager.querySetting( "PlotYHat" ).booleanValue();
boolean showDevSquares = configManager.querySetting( "PlotDevSquares" ).booleanValue();;

addGraphShape( new GraphGrid( bottomLeft, upperRight) );
if ( showYBar ) {
addGraphShape( new GraphRegressionLine( regressionLine, bottomLeft, upperRight, statManager, this ) );
}

if ( showXYBars && collection.size() > 0 ) {
addGraphShape( new GraphBars( statManager.calcXBar(), statManager.calcYBar(), bottomLeft, upperRight) );
}

int pointCount = 0;

while ( it.hasNext() ) {
Point point = (Point)it.next();
GraphShape graphPoint = new GraphPoint( point );
addGraphShape( graphPoint );

pointCount++;

if ( showResiduals ) {
GraphShape resLine = new GraphResidual( regressionLine, point );
addGraphShape( resLine );
}
if ( showDeviations ) {
GraphShape devLine = new GraphDeviation( point, statManager.calcYBar() );
addGraphShape( devLine );
}
if ( showResSquares ) {
GraphShape resSquare = new GraphResidualSquare( regressionLine, point, pointCount );
addGraphShape( resSquare );
}
if ( showDevSquares ) {
GraphShape devSquare = new GraphDeviationSquare( point, statManager.calcYBar(), pointCount );
addGraphShape( devSquare );
}
}

// add the stat display
addGraphShape( new GraphStatDisplay( graph, statManager) );
}

private void drawGraphShapes() {
AbstractCollection collection = getShapeList();
Iterator it = collection.iterator();

while ( it.hasNext() ) {
GraphShape shape = (GraphShape)it.next();
shape.draw( graphWriter );
}
}


// adding and general management for shapes:
private void addGraphShape( GraphShape shape ) {
graphShapes.add( shape );
}


private void clearGraphShapes() {
graphShapes.clear();
}


private AbstractCollection getShapeList() {
return graphShapes;
}


private boolean isDragging() {
return isDragging;
}


private void drag( Point mousePoint ) {
if ( draggedShape != null ) {
draggedShape.drag( mousePoint );
}

statManager.refreshTable();
}


private boolean beginDrag( Point mousePoint ) {
AbstractCollection collection = getShapeList();
Iterator it = collection.iterator();

while ( it.hasNext() ) {
GraphShape shape = (GraphShape)it.next();

if ( shape.canDrag( mousePoint ) ) {
setDraggedShape( shape );
isDragging = true;
return true;
}
}

return false;
}


private void mouseOver( Point mousePoint ) {
AbstractCollection collection = getShapeList();
Iterator itShapes = collection.iterator();

boolean found = false;
GraphShape foundShape = null;

double shortestDistance = 0.0;
GraphShape nearestShape = null;
boolean firstPass = true;

itShapes = collection.iterator();

while ( itShapes.hasNext() ) {
GraphShape shape = (GraphShape)itShapes.next();
double distanceFromMouse = shape.getDistance( mousePoint );
if ( distanceFromMouse >= 0
&& shape.isMouseOver( mousePoint) && ( distanceFromMouse < shortestDistance
|| firstPass ) ) {
nearestShape = shape;
shortestDistance = distanceFromMouse;
firstPass = false;
}
}

if ( nearestShape != null && shortestDistance >= 0 ) {
nearestShape.mouseOver( mousePoint );
showDescription( nearestShape.getDescription( statManager ) );
}
else {
showDescription( null );
}

itShapes = collection.iterator();
while ( itShapes.hasNext() ) {
GraphShape shape = (GraphShape)itShapes.next();

if ( shape != nearestShape ) {
shape.mouseAway( mousePoint);
}
}
}


private void endDrag() {
isDragging = false;
draggedShape = null;
}


private void setDraggedShape( GraphShape shape ) {
draggedShape = shape;
}


private void showDescription( String description ) {
/*
* HACK - The functionality of Swing's tool-tips seems rather
* limited (as far as I can tell). So in order to display a tip over
* the mouse cursor, next to the nearest point, I'm "pushing" the
* tool-tips as far as they'll go.
*
* Swing leaves the tool-tips where the mouse originally stayed for
* the delay, but we want them to follow the mouse. In order to
* achieve this effect, I subtly modify the tool-tip's text each
* pass. I couldn't find a way to turn an individual tool-tip on and
* off, so I cleverly send in a null pointer to the setToolTipText
* method. - AO
*/
// HACK - we alternate between the text the
// tool tip displays so that the tip stays "refreshed"
if ( toolTipState ) {
graph.setToolTipText( description );
}
else if ( description == null ) {
graph.setToolTipText( null );
}
else {
graph.setToolTipText( description + " " );
}

toolTipState = !toolTipState;
}


private Color getResSquareColor( int num, int numSquares ) {
int r = 96;
int g = 154;

if ( numSquares == 0 ) {
numSquares = 1;
}

int b = 128 + ( (int) ( 0.5 *( 255 / numSquares * num ) ) );

return new Color( r, g, b, 128 );
}


private Color getDevSquareColor( int num, int numSquares ) {
int r = 128;// + ( (int) ( 0.5 *( 255 / numSquares * num ) ) );
int g = 128 + ( (int) ( 0.5 *( 255 / numSquares * num ) ) );
int b = 0;

return new Color( r, g, b, 128 );
}


private int getGraphWidth() {
return (int)( upperRight.getX() - bottomLeft.getX() );
}


private int getGraphHeight() {
return (int)( upperRight.getY() - bottomLeft.getY() );
}
// the interface that the GraphShapes use
public class GraphWriter {
public void writeMessage( Point point, String message ) {
graph.drawMessage( point, message );
}
public void drawDevSquare( Rectangle rectangle, int num ) {
graph.drawRect( rectangle, getDevSquareColor( num, statManager.countPoints() ) );
}

public void drawDevSquareHighlighted( Rectangle rectangle, int num ) {
graph.drawRect( rectangle, new Color( 0, 128, 0 ) );
}

public void drawPoint( Point point ) {
drawPoint( point, 1, false );
}

public void drawPoint( Point point, double scale ) {
graph.drawPoint( point, scale );
}

public void drawPointHighlighted( Point point ) {
drawPoint( point, 1.5, true );
}


public void drawLine( Line line, Color color ) {
drawLine( line, color, false );
}


public void drawLineHighlighted( Line line, Color color ) {
drawLine( line, color, true );
}


public void drawLineSegment( LineSegment lineSegment, Color color ) {
graph.drawLineSegment( lineSegment, 1, color );
}


public void drawLineSegmentHighlighted( LineSegment lineSegment, Color color ) {
graph.drawLineSegment( lineSegment, 3, color );
}


public void drawResidualSquareHighlighted( Rectangle rectangle, int squareNum ) {
graph.drawRect( rectangle, new Color(0, 0, 200, 255) );
}

public void drawResidualSquare( Rectangle rectangle, int squareNum ) {
graph.drawRect( rectangle, getResSquareColor( squareNum, statManager.countPoints() ) );
}
/*------------------------------------------------------------
* These methods directly write to the graph
*-----------------------------------------------------------*/
private void drawPoint( Point point, double scale, boolean highlight ) {
if ( !highlight ) {
graph.drawPoint( point );
}
else {
graph.drawPoint( point, 2 );
}
}


private void drawLine( Line line, Color color, boolean highlight ) {
// TODO: it's discomforting dynamically allocating one of these each pass...
// maybe cache one
LineSegment lineAsSegment = new LineSegment( bottomLeft.getX(), line.f( bottomLeft.getX() ),
upperRight.getX(), line.f( upperRight.getX() ) );

if ( highlight ) {
graph.drawLineSegment( lineAsSegment, 10, color );
}
else {
graph.drawLineSegment( lineAsSegment, 4, color );
}
}


private void drawLineSegment( LineSegment lineSegment, Color color, boolean highlight ) {

}


}

private class MouseHandler implements MouseListener, MouseMotionListener {
public void mouseClicked( MouseEvent event ) {
Point point = new Point( event.getPoint() );
point = graph.toPlaneCoords( point );
pointTable.addPoint( point );
updateGraph();
}


public void mouseReleased( MouseEvent event ) {

}


public void mouseExited( MouseEvent event ) {

}


public void mouseEntered( MouseEvent event ) {

}


public void mousePressed( MouseEvent event ) {

}


public void mouseDragged( MouseEvent event ) {
Point mousePoint = new Point( event.getPoint() );
mousePoint = graph.toPlaneCoords( mousePoint );

if ( isDragging() ) {
drag( mousePoint );
}
else {
if ( !beginDrag( mousePoint ) ) {
Point newPoint = new Point( mousePoint );
pointTable.addPoint( newPoint );
setDraggedShape( new GraphPoint( newPoint ) );
isDragging = true;
}
}
updateGraph();
}


/**
* If the mouse cursor is near a point, then select it and display
* relevant information about it in a tool tip
*/
public void mouseMoved( MouseEvent event ) {
// get the cursor's position
Point mousePoint = graph.toPlaneCoords( new Point( event.getPoint() ) );

mouseOver( mousePoint );

// set the dragged point to null
if ( isDragging() ) {
endDrag();
}

updateGraph( false );
}
}

// custom regression line stuff:
private boolean useBestFitLine;

private Line customRegressionLine;

private int resSquareCount;

private static final Point INIT_MESSAGE_POSITION = new Point( 100, 230 );

private static final Point INIT_MESSAGE_DRAG_POSITION = new Point( 100, 217 );
private static final String INIT_MESSAGE = "- Click on the graph to plot a point.";

private static final String INIT_MESSAGE_DRAG = "- Drag points and observe the effects";
// the maximum distance from the cursor a point
// must be to be dragged
private static final int CURSOR_DRAG_DISTANCE = 30;

// this member describes whether or not we should
// draw the tool tip as usual or with
// a slight modification that will force
// swing to display it again
// TODO: Fix this hack if possible - AO
private boolean toolTipState;

private Point selectedPoint;

private boolean isDragging;

private PointTable pointTable;

private MouseHandler mouseHandler;

private ConfigManager configManager;

private StatManager statManager;

private Graph graph;

// list of graph objects
private ArrayList graphShapes;

private GraphWriter graphWriter;

// dragged object
private GraphShape draggedShape;

private Point bottomLeft;

private Point upperRight;

}


GraphGrid.java
-------------------------------------------------------------------
/*
* Created on Apr 2, 2005
*/

/**
* @author Andrew Owens
*/

public class GraphGrid extends GraphShape {
public GraphGrid( Point newBottomLeft, Point newUpperRight ) {
bottomLeft = newBottomLeft;
upperRight = newUpperRight;
axisX = new LineSegment( bottomLeft.getX(), 0, upperRight.getX(), 0 );
axisY = new LineSegment( 0, bottomLeft.getY(), 0, upperRight.getY() );
}

protected void onDraw( Grapher.GraphWriter graph ) {
// draw the axis
graph.drawLineSegment( axisX, ColorSchemeManager.AXIS );
graph.drawLineSegment( axisY, ColorSchemeManager.AXIS );

// add lines that represent a set distance along the axes

// x axis
final int deltaX = (int) ( ( upperRight.getX() ) / NUM_AXIS_TICKS );
final int AXIS_TICK_LENGTH = (int)upperRight.getX();
final int PARA_TEXT_OFFSET = 1;
final int PER_TEXT_OFFSET = -10;

LineSegment tickSegment = new LineSegment();
Point txtPoint = new Point( 0, 0 );

boolean draw = true;

for ( int x = 0; x <= upperRight.getX(); x = x + deltaX) {
tickSegment.setLine( x, -AXIS_TICK_LENGTH, x, AXIS_TICK_LENGTH );
graph.drawLineSegment( tickSegment, ColorSchemeManager.GRID );

if ( draw ) {
txtPoint.setLocation( x + PARA_TEXT_OFFSET, PER_TEXT_OFFSET );
graph.writeMessage( txtPoint, Integer.toString( x ) );
}

draw = !draw;
}

draw = true;
for ( int x = 0; bottomLeft.getX() <= x; x = x - deltaX ) {
tickSegment.setLine( x, -AXIS_TICK_LENGTH, x, AXIS_TICK_LENGTH );
graph.drawLineSegment( tickSegment, ColorSchemeManager.GRID );

if ( draw ) {
txtPoint.setLocation( x + PARA_TEXT_OFFSET, PER_TEXT_OFFSET );
graph.writeMessage( txtPoint, Integer.toString( x ) );
}

draw = !draw;
}


// y axis
final int deltaY = (int) ( upperRight.getY() / NUM_AXIS_TICKS );

for ( int y = 0; y <= upperRight.getY(); y = y + deltaY ) {
tickSegment.setLine( -AXIS_TICK_LENGTH, y, AXIS_TICK_LENGTH, y );
graph.drawLineSegment( tickSegment, ColorSchemeManager.GRID );

if ( draw ) {
String asStrY = Integer.toString( y );
txtPoint.setLocation( -asStrY.length() * 8, y + PARA_TEXT_OFFSET );
graph.writeMessage( txtPoint, asStrY );
}

draw = !draw;
}

for ( int y = 0; bottomLeft.getY() <= y; y = y - deltaY ) {
tickSegment.setLine( -AXIS_TICK_LENGTH, y, AXIS_TICK_LENGTH, y );
graph.drawLineSegment( tickSegment, ColorSchemeManager.GRID );

if ( draw ) {
String asStrY = Integer.toString( y );
txtPoint.setLocation( -asStrY.length() * 8, y + PARA_TEXT_OFFSET );
graph.writeMessage( txtPoint, asStrY );
}

draw = !draw;
}

}

private LineSegment axisX;

private LineSegment axisY;

private Point upperRight;

private Point bottomLeft;

private static final int NUM_AXIS_TICKS = 10;

}


GraphPoint.java
-------------------------------------------------------------------
/*
* Created on Mar 30, 2005
*/

/**
* @author Andrew Owens
*/

public class GraphPoint extends GraphShape {

public GraphPoint( Point newPoint ) {
setPoint( newPoint );
}


public void setPoint( Point newPoint ) {
point = newPoint;
}


public boolean canDrag( Point mousePoint ) {
return ( mousePoint.distance( point ) <= DRAG_DISTANCE );
}


public String getDescription( StatManager statManager ) {
Line regressionLine = statManager.calcRegressionLine();

return "(" + point.getX() + ", " + point.getY() + ")
" + "Residual = "
+ StatManager.roundStat( regressionLine.findResidual( point ), 3 ) + "
" + "Dev x = "
+ ( StatManager.roundStat( statManager.calcXBar() - point.getX(), 3 ) )
+ "
" + "Dev y = " + StatManager.roundStat( statManager.calcYBar() - point.getY(), 3 ) + "
";

}


public double getDistance( Point comparePoint ) {
return point.distance( comparePoint );
}


protected void onDraw( Grapher.GraphWriter graph ) {
if ( isHighlighted ) {
graph.drawPointHighlighted( point );
}
else {
graph.drawPoint( point );
}
}


protected void onClick( Point mousePoint ) {

}


protected void onDrag( Point mousePoint ) {
point.setLocation( mousePoint.getX(), mousePoint.getY() );
}


protected void onMouseOver( Point point ) {
isHighlighted = true;
}


protected void onMouseAway( Point mousePoint ) {
isHighlighted = false;
}


public boolean isMouseOver( Point mousePoint ) {
return ( point.distance( mousePoint ) <= MOUSEOVER_DISTANCE );
}


private Point point;

private boolean isHighlighted;

private static final int MOUSEOVER_DISTANCE = 12;

private static final int DRAG_DISTANCE = 20;
}


GraphRegressionLine.java
-------------------------------------------------------------------
/*
* Created on Mar 31, 2005
*/

/**
* @author Andrew Owens
*/

import java.awt.Color;

// rather hacky because of the custom best-fit line
public class GraphRegressionLine extends GraphShape {
public GraphRegressionLine( Line newRegressionLine, Point newBottomLeft, Point newUpperRight, StatManager newStatManager, Grapher newGrapher ) {
pointToCompare = new Point();
initLine( newRegressionLine );
grapher = newGrapher;
bottomLeft = newBottomLeft;
upperRight = newUpperRight;
statManager = newStatManager;
}


public String getDescription( StatManager statManager ) {
return "y = "
+ StatManager.roundStat( regressionLine.getSlope(), 3 ) + "x + "
+ StatManager.roundStat( regressionLine.getYIntercept(), 3 ) + "";
}


private void initLine( Line newRegressionLine ) {
regressionLine = newRegressionLine;
}


protected void onDraw( Grapher.GraphWriter graph ) {
Color color = ( isCustomLine ) ? ColorSchemeManager.CUSTOM_REGRESSION : ColorSchemeManager.REGRESSION_LINE ;
if ( isHighlighted ) {
graph.drawLineHighlighted( regressionLine, color );
}
else {
graph.drawLine( regressionLine, color );
}

if ( isCustomLine ) {
graph.drawLine( statManager.calcBestFit(), ColorSchemeManager.GHOST_REGRESSION_LINE );
graph.drawPoint( new Point( getCloseMiddle() , regressionLine.f( getCloseMiddle() ) ) );
}
}


protected void onMouseOver( Point mousePoint ) {
isHighlighted = true;
}


protected void onMouseAway( Point mousePoint ) {
isHighlighted = false;
isDragging = false;
}


protected boolean canDrag( Point mousePoint ) {
//return isMouseOver( mousePoint );
//@hack for initial release
return false;
}


protected void onDrag( Point mousePoint ) {
isCustomLine = true;

if ( !isDragging ) {
if ( mousePoint.getX() < getCloseMiddle() ) {
pivot = new Point( upperRight.getX(), regressionLine.f( upperRight.getX() ) );
}
else {
pivot = new Point( bottomLeft.getX(), regressionLine.f( bottomLeft.getX() ) );
}
}


isDragging = true;
if ( pivot != null ) {
regressionLine.setLine( mousePoint, pivot );
}
grapher.useCustomLine();
}

private double getCloseMiddle() {
return ( upperRight.getX() - bottomLeft.getX() - 200 ) / 2 ;
}
public boolean isMouseOver( Point mousePoint ) {
return ( getDistance( mousePoint ) < HIGHLIGHT_DISTANCE );
}


public double getDistance( Point point ) {
pointToCompare.setLocation( point.getX(), regressionLine.f( point.getX() ) );
return pointToCompare.distance( point );
}

// instead of allocating a new point at runtime, just modify this one
private Point pointToCompare;

private boolean isHighlighted;

private Line regressionLine;

private static final int HIGHLIGHT_DISTANCE = 7;

private Grapher grapher;

private Point bottomLeft;

private Point upperRight;

private StatManager statManager;

private static Point pivot;

private static boolean isDragging;

private static boolean isCustomLine;




}


GraphResidual.java
-------------------------------------------------------------------
/*
* Created on Mar 31, 2005
*/

/**
* @author Andrew Owens
*/

public class GraphResidual extends GraphShape {
public GraphResidual( Line regressionLine, Point point ) {
initLine( regressionLine, point );
}


private void initLine( Line regressionLine, Point point ) {
residualLineSegment = regressionLine.findResidualLine( point );
}


protected void onDraw( Grapher.GraphWriter graph ) {
if ( isHighlighted ) {
graph.drawLineSegmentHighlighted( residualLineSegment, ColorSchemeManager.RESIDUAL );
}
else {
graph.drawLineSegment( residualLineSegment, ColorSchemeManager.RESIDUAL );
}
}



public String getDescription( StatManager statManager ) {
return "Length = "
+ ( residualLineSegment.getP1().distance( residualLineSegment.getP2() ) )
+ "";
}


public double getDistance( Point point ) {
return residualLineSegment.ptSegDist( point );
}


public boolean isMouseOver( Point mousePoint ) {
return ( residualLineSegment.ptLineDistSq( mousePoint ) <HIGHLIGHT_DISTANCE );
}


protected void onMouseOver( Point mousePoint ) {
isHighlighted = true;
}


protected void onMouseAway( Point mousePoint ) {
isHighlighted = false;
}


private static final int HIGHLIGHT_DISTANCE = 5;

private boolean isHighlighted;

private LineSegment residualLineSegment;
}


GraphResidualSquare.java
-------------------------------------------------------------------
/*
* Created on Apr 1, 2005
*/

/**
* @author Andrew Owens
* @author Doug Tremblay
* @author Steven Rowe Bradley
*/

public class GraphResidualSquare extends GraphShape {

public GraphResidualSquare( Line regression, Point point, int newSquareNum ) {
square = regression.findResSquare( point );
center = new Point( square.getCenterX(), square.getCenterY() );
squareNum = newSquareNum;
}

public String getDescription(StatManager stats) {
return "Residual Squared = " + StatManager.roundStat( (square.getWidth() * square.getHeight() ), 3) + "";
}


protected void onDraw( Grapher.GraphWriter graph ) {
if ( isHighlighted ) {
graph.drawResidualSquareHighlighted( square, squareNum );
}
graph.drawResidualSquare( square, squareNum );
}


public boolean isMouseOver( Point mousePoint ) {
return ( mousePoint.getX() >= square.getX()
&& mousePoint.getX() <= square.getX() + square.getWidth()
&& mousePoint.getY() >= square.getY() - square.getHeight()
&& mousePoint.getY() <= square.getY() );
}


public double getDistance( Point point ) {
return center.distance( point );
}


protected void onMouseOver( Point mousePoint ) {
isHighlighted = true;
}


protected void onMouseAway( Point mousePoint ) {
isHighlighted = false;
}

// so we don't have to allocate a center each pass
private Point center;

private int squareNum;

private boolean isHighlighted;

private Rectangle square;
}


GraphShape.java
-------------------------------------------------------------------
/*
* Created on Mar 30, 2005
*/

/**
* @author Andrew Owens
*/

public abstract class GraphShape {

public boolean clicked( Point point ) {
if ( isClicked( point ) ) {
onClick( point );
return true;
}
else {
return false;
}
}


public void drag( Point point ) {
onDrag( point );
}

public boolean mouseOver( Point point ) {
if ( isMouseOver( point ) ) {
onMouseOver( point );
return true;
}
else {
onMouseAway( point );
return false;
}
}


public String getDescription( StatManager statManager ) {
return "";
}


public void draw( Grapher.GraphWriter graph ) {
onDraw( graph );
}


public void mouseAway( Point mousePoint ) {
onMouseAway( mousePoint );
}


public double getDistance( Point point ) {
return -1.0;
}
/*----------------------------------------
* Protected interface
*--------------------------------------*/

protected boolean isClicked( Point point ) {
return false;
}


protected boolean canDrag( Point point ) {
return false;
}


public boolean isMouseOver( Point point ) {
return false;
}


protected void onClick( Point point ) {

}


protected void onDrag( Point mousePoint ) {

}


protected void onMouseOver( Point point ) {

}


protected void onDraw( Grapher.GraphWriter graph ) {

}


protected void onUpdateState() {

}

protected void onMouseAway( Point mousePoint ) {

}

}


GraphStatDisplay.java
-------------------------------------------------------------------
/*
* Created on Apr 6, 2005
*/

/**
* @author Andrew Owens
*/

import javax.swing.JPanel;
import javax.swing.JLabel;

public class GraphStatDisplay extends GraphShape {
GraphStatDisplay( Graph graph, StatManager newStatManager ) {
statManager = newStatManager;
statDisplay = new JPanel();
initDisplay();
graph.addStatDisplay( statDisplay );
}


public void onDraw( Grapher.GraphWriter graphWriter ) {
statDisplay.setVisible( true );
}

private void initDisplay() {
Line regressionLine = statManager.calcRegressionLine();

StringBuffer display = new StringBuffer();

display.append( "" );

display.append( "  ŷ = " + StatManager.roundStat( regressionLine.getSlope(), 3 )
+ "x + "
+ StatManager.roundStat( regressionLine.getYIntercept(), 3 )
+ "

" );
//}
//if ( configManager.querySetting( "ShowXYBars").isValid()
// && configManager.querySetting( "ShowXYBars" ).booleanValue() ) {
display.append( "  x = "
+ StatManager.roundStat( statManager.calcXBar(), 3 )
+ "

" );
display.append( "  y = "
+ StatManager.roundStat( statManager.calcYBar(), 3 )
+ "

" );
//}
//if ( configManager.querySetting( "ShowR" ).isValid()
// && configManager.querySetting( "ShowR" ).booleanValue() ) {
display.append( "  r = "
+ StatManager.roundStat( statManager.calcR(), 4 )
+ "

" );
//}
//if ( configManager.querySetting( "ShowRSquared" ).isValid()
// && configManager.querySetting( "ShowRSquared" ).booleanValue() ) {
display.append( "  r² = "
+ StatManager.roundStat( statManager.calcRSquare(), 4 )
+ "

" );
//}
//if ( configManager.querySetting( "ShowSSres").isValid()
// && configManager.querySetting( "ShowSSres").booleanValue() ) {

display.append( "  SS_res = "
+ StatManager.roundStat( statManager.calcSSres(), 3 )
+ "

" );
//}
//if ( configManager.querySetting( "ShowSSdev").isValid()
// && configManager.querySetting( "ShowSSdev").booleanValue() ) {

display.append( "  SS_dev = "
+ StatManager.roundStat( statManager.calcSSdev(), 3 )
+ "

" );
//}


display.append( "" );

setText( display.toString() );
statDisplay.setSize( 300, 300 );
statDisplay.setLocation( 30, 30 );
}


private void setText( String display ) {
statDisplay.add( new JLabel( display ) );
}

private StatManager statManager;

private JPanel statDisplay;
}


JavaPic_emblemjpg.java
-------------------------------------------------------------------
// JavaPic_emblemjpg.java

import javax.swing.*;
import java.awt.*;

//Raw image data:

public class JavaPic_emblemjpg{
public static ImageIcon getImageIcon() {
if (imageIcon == null) { imageIcon = new ImageIcon(bytes); }
return imageIcon;
}
public static Image getImage() { return getImageIcon().getImage(); }
private static ImageIcon imageIcon;
private static byte[] bytes = {
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}


JavaPic_homeworkjpg.java
-------------------------------------------------------------------
// JavaPic_homeworkjpg.java

import javax.swing.*;
import java.awt.*;

//Raw image data:

public class JavaPic_homeworkjpg{
public static ImageIcon getImageIcon() {
if (imageIcon == null) { imageIcon = new ImageIcon(bytes); }
return imageIcon;
}
public static Image getImage() { return getImageIcon().getImage(); }
private static ImageIcon imageIcon;
private static byte[] bytes = {
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}


JavaPic_hqjpg.java
-------------------------------------------------------------------
// JavaPic_hqjpg.java

import javax.swing.*;
import java.awt.*;

//Raw image data:

public class JavaPic_hqjpg{
public static ImageIcon getImageIcon() {
if (imageIcon == null) { imageIcon = new ImageIcon(bytes); }
return imageIcon;
}
public static Image getImage() { return getImageIcon().getImage(); }
private static ImageIcon imageIcon;
private static byte[] bytes = {
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}


JavaPic_instructionjpg.java
-------------------------------------------------------------------
// JavaPic_instructionjpg.java

import javax.swing.*;
import java.awt.*;

// Raw image data:

public class JavaPic_instructionjpg{
public static ImageIcon getImageIcon() {
if (imageIcon == null) { imageIcon = new ImageIcon(bytes); }
return imageIcon;
}
public static Image getImage() { return getImageIcon().getImage(); }
private static ImageIcon imageIcon;
private static byte[] bytes = {
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