Class Tablet

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Window
                    |
                    +--java.awt.Frame
                          |
                          +--Tablet

class Tablet

extends java.awt.Frame

implements java.awt.event.ActionListener, java.awt.event.KeyListener, java.awt.event.MouseMotionListener, java.awt.event.MouseListener

In this class last_index refers to the index of the last point read in the points array (ie. it can directly be used to access the last point entered. last_index is actually one less than the number of calid points in the points array. Due to derivation, speed array's length is equal to last_index. Also acceleration's legnth is (last_index-1). Time array has the same length as points. It stores the time that was supplied to addPoint( Point point, long time ) method. In order to make proper use of cached data, additions to points and time array should be done via the addPoint( Point point, long time ) method.

See Also:

Serialized Form

Inner classes inherited from class java.awt.Component

java.awt.Component.AWTTreeLock

Field Summary

boolean	a_is_valid
java.awt.MenuItem	a_menu
double	a_scale
java.awt.Frame	a_window
java.awt.Graphics	a_window_graphics
double[]	acceleration
static StatisticsModule	bar_statistics_module
Point	center
double	combine_treshold
private ControlModule	control_module
java.awt.MenuItem	controls_menu
double[]	d
boolean	d_is_valid
java.awt.MenuItem	d_menu
double	d_theta_scale
java.awt.Frame	d_window
java.awt.Graphics	d_window_graphics
double[]	dd_dt
boolean	dd_dt_is_valid
java.awt.MenuItem	dd_dt_menu
java.awt.Frame	dd_dt_window
java.awt.Graphics	dd_dt_window_graphics
static boolean	debug
static java.awt.Graphics	debug_graphics
static boolean	debug2
java.awt.Menu	direction_menu
boolean	display_lsq_vectors
java.awt.MenuItem	display_menu
java.awt.Menu	edit
java.awt.Menu	file
boolean	FILTER_ON
boolean	in_recognition_mode
int	last_index
Point[]	line
Point	lower_left
java.awt.MenuBar	menubar
private ObjectManager	object_manager
private java.awt.Dimension	off_dimension
java.awt.Menu	options
double	orientation_angle
Point[]	output_polygon
java.awt.Menu	pen_menu
Point[]	points
PolarPoint[]	polar_points
boolean	polar_points_is_valid
java.awt.MenuItem	quit_menu
java.awt.Dimension	radius
double	scale
double	sd_scale
static long	sequence_delay
boolean	show_parsed_objects
static StatisticsModule	sliding_window_statistics_module
double[]	speed
java.awt.MenuItem	statistics_menu
double	step_angle
double	t_scale
double	theta_scale
long[]	time
double	turn_angle_treshold
java.awt.MenuItem	undo_menu
Point	upper_right
boolean	v_is_valid
java.awt.MenuItem	v_menu
double	v_scale
java.awt.Frame	v_window
java.awt.Graphics	v_window_graphics
java.awt.MenuItem	vectors_menu
static double	window_width
java.awt.Menu	windows
static java.awt.Graphics	x_window_graphics

Fields inherited from class java.awt.Frame

base, CROSSHAIR_CURSOR, DEFAULT_CURSOR, E_RESIZE_CURSOR, frameSerializedDataVersion, HAND_CURSOR, icon, ICONIFIED, mbManagement, menuBar, MOVE_CURSOR, N_RESIZE_CURSOR, nameCounter, NE_RESIZE_CURSOR, NORMAL, NW_RESIZE_CURSOR, ownedWindows, resizable, S_RESIZE_CURSOR, SE_RESIZE_CURSOR, serialVersionUID, state, SW_RESIZE_CURSOR, TEXT_CURSOR, title, W_RESIZE_CURSOR, WAIT_CURSOR, weakThis

Fields inherited from class java.awt.Window

active, base, focusMgr, inputContext, nameCounter, OPENED, ownedWindowList, serialVersionUID, state, warningString, weakThis, windowListener, windowSerializedDataVersion

Fields inherited from class java.awt.Container

component, containerListener, containerSerializedDataVersion, dispatcher, layoutMgr, maxSize, ncomponents, serialVersionUID

Fields inherited from class java.awt.Component

actionListenerK, adjustmentListenerK, appContext, assert, background, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, changeSupport, componentListener, componentListenerK, componentOrientation, componentSerializedDataVersion, containerListenerK, cursor, dropTarget, enabled, eventMask, focusListener, focusListenerK, font, foreground, hasFocus, height, incRate, inputMethodListener, inputMethodListenerK, isInc, isPacked, itemListenerK, keyListener, keyListenerK, LEFT_ALIGNMENT, locale, LOCK, minSize, mouseListener, mouseListenerK, mouseMotionListener, mouseMotionListenerK, name, nameExplicitlySet, newEventsOnly, ownedWindowK, parent, peer, peerFont, popups, prefSize, RIGHT_ALIGNMENT, serialVersionUID, textListenerK, TOP_ALIGNMENT, valid, visible, width, windowListenerK, x, y

Constructor Summary

Tablet(int max_data_points, double s, double avg_scale, java.lang.String cursor_image_name)
The constructor.

Method Summary

void	actionPerformed(java.awt.event.ActionEvent e) Handle action events
void	addPoint(Point p, long t) Add a new point to points, and the corresponding time info to time.
double	averageSpeed() Average speed
void	clearScreen() Clear screen
void	clearScreenStrong() Clear screen strong (works in debug mode).
void	combineEndPoints() Combines the ends of the polygon if they are sufficiently close.
void	derive_d() Derive direction, and fill in the d array.
void	derive_dd_dt() Derive time derivative of direction, and fill in the dd_dt array.
void	deriveAcceleration() Derive acceleration, and fill in the acceleration array.
void	deriveBoundingBox() Derive the bounding box for thee points.
void	derivePolarCoordinates() Derive the polar coordinates of the points with respect to the center.
void	deriveSpeed() Derive speed, and fill in the speed array.
void	filter() Try to get rid of some of the noise.
Polygon	getDataPoints() Put the valid points in the points array in a Polygon and return it.
int[]	getPolygonIndices() calculate the lsq error.
void	invalidateCaches() Invalidates caches
void	keyPressed(java.awt.event.KeyEvent k) Handle key stroke events
void	keyReleased(java.awt.event.KeyEvent k) Handle key stroke events
void	keyTyped(java.awt.event.KeyEvent k) Handle key stroke events
double	leastSquaresForCircle() calculate the lsq error.
double	leastSquaresForPolygon() calculate the lsq error.
void	mouseClicked(java.awt.event.MouseEvent e) Handle mouse events
void	mouseDragged(java.awt.event.MouseEvent e) Handle mouse motion events
void	mouseEntered(java.awt.event.MouseEvent e) Handle mouse events
void	mouseExited(java.awt.event.MouseEvent e) Handle mouse events
void	mouseMoved(java.awt.event.MouseEvent e) Handle mouse motion events
void	mousePressed(java.awt.event.MouseEvent e) Handle mouse events
void	mouseReleased(java.awt.event.MouseEvent e) Handle mouse events
void	normalizePolygon() Modify the polygon, so that the lines appear as the user wanted them to be (ie, get rid of the small rotations and shifts.
void	paint(java.awt.Graphics g) Overloaded for double buffering.
void	plot_output_circle() Plot the recognized circle if one was recognized.
void	plot_output_line() Plot the recognized line if one was recognized.
void	plot_output_polygon() Plot the recognized polygon if one was recognized.
void	reset() Reset the arrays
void	setDebugging(boolean d) Set debugging mode
void	setRecognitionMode(boolean flag) Disable or enable recognition process by turning mouse event listening off or on.
void	simplifyPolygon() Simplify the polygon to get rid of consecutive lines which are sufficiently parallel.
void	sleep(int iterations) Do useless work for some number of iterations specified by the argument.
boolean	test_circle() See if the input was meant to be a circle.
boolean	test_line() See if the input is a line.
boolean	test_polygon() See if the input is a polygon.
void	update_d() Update the direction graph.
void	update_dd_dt() Update change in direction
void	update(java.awt.Graphics g) Handle double buffering and do the real drawing.
void	updateAcceleration() Update the acceleration graph.
void	updateMain() Update the main graph.
void	updateVelocity() Update the velocity graph.

Methods inherited from class java.awt.Frame

, addNotify, addToFrameList, constructComponentName, finalize, getCursorType, getFrames, getIconImage, getMenuBar, getState, getTitle, initIDs, isResizable, paramString, postProcessKeyEvent, readObject, remove, removeFromFrameList, removeNotify, setCursor, setIconImage, setMenuBar, setResizable, setState, setTitle, writeObject

Methods inherited from class java.awt.Window

addOwnedWindow, addWindowListener, applyResourceBundle, applyResourceBundle, connectOwnedWindow, dispatchEventImpl, dispose, eventEnabled, getFocusOwner, getInputContext, getLocale, getOwnedWindows, getOwner, getToolkit, getWarningString, hide, isActive, isShowing, nextFocus, ownedInit, pack, postEvent, postWindowEvent, preProcessKeyEvent, processEvent, processWindowEvent, removeOwnedWindow, removeWindowListener, setCursor, setFocusOwner, setWarningString, show, toBack, toFront, transferFocus

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, applyOrientation, countComponents, deliverEvent, dispatchEventToSelf, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents_NoClientCode, getComponents, getCursorTarget, getInsets, getLayout, getMaximumSize, getMinimumSize, getMouseEventTarget, getPreferredSize, getWindow, insets, invalidate, invalidateTree, isAncestorOf, layout, lightweightPrint, list, list, locate, minimumSize, paintComponents, postsOldMouseEvents, preferredSize, print, printComponents, printOneComponent, processContainerEvent, proxyEnableEvents, proxyRequestFocus, remove, remove, removeAll, removeContainerListener, setFont, setLayout, updateCursor, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addPropertyChangeListener, addPropertyChangeListener, areInputMethodsEnabled, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, getBackground, getBounds, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont_NoClientCode, getFont, getFontMetrics, getForeground, getGraphics, getHeight, getInputMethodRequests, getIntrinsicCursor, getLocation, getLocation, getLocationOnScreen, getName, getNativeContainer, getParent_NoClientCode, getParent, getPeer, getSize, getSize, getToolkitImpl, getTreeLock, getWidth, getWindowForObject, getX, getY, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isDisplayable, isDoubleBuffered, isEnabled, isEnabledImpl, isFocusTraversable, isLightweight, isOpaque, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, removeComponentListener, removeFocusListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setDropTarget, setEnabled, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, size, toString, transferFocus

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, registerNatives, wait, wait, wait

Field Detail

last_index

public int last_index

points

public Point[] points

output_polygon

public Point[] output_polygon

time

public long[] time

speed

public double[] speed

acceleration

public double[] acceleration

d

public double[] d

dd_dt

public double[] dd_dt

polar_points

public PolarPoint[] polar_points

scale

public double scale

a_scale

public double a_scale

v_scale

public double v_scale

t_scale

public double t_scale

theta_scale

public double theta_scale

combine_treshold

public double combine_treshold

d_theta_scale

public double d_theta_scale

sd_scale

public double sd_scale

step_angle

public double step_angle

orientation_angle

public double orientation_angle

turn_angle_treshold

public double turn_angle_treshold

lower_left

public Point lower_left

upper_right

public Point upper_right

center

public Point center

radius

public java.awt.Dimension radius

line

public Point[] line

polar_points_is_valid

public boolean polar_points_is_valid

v_is_valid

public boolean v_is_valid

a_is_valid

public boolean a_is_valid

d_is_valid

public boolean d_is_valid

dd_dt_is_valid

public boolean dd_dt_is_valid

display_lsq_vectors

public boolean display_lsq_vectors

show_parsed_objects

public boolean show_parsed_objects

in_recognition_mode

public boolean in_recognition_mode

v_window

public java.awt.Frame v_window

a_window

public java.awt.Frame a_window

d_window

public java.awt.Frame d_window

dd_dt_window

public java.awt.Frame dd_dt_window

menubar

public java.awt.MenuBar menubar

file

public java.awt.Menu file

quit_menu

public java.awt.MenuItem quit_menu

edit

public java.awt.Menu edit

undo_menu

public java.awt.MenuItem undo_menu

windows

public java.awt.Menu windows

v_menu

public java.awt.MenuItem v_menu

a_menu

public java.awt.MenuItem a_menu

pen_menu

public java.awt.Menu pen_menu

direction_menu

public java.awt.Menu direction_menu

d_menu

public java.awt.MenuItem d_menu

dd_dt_menu

public java.awt.MenuItem dd_dt_menu

controls_menu

public java.awt.MenuItem controls_menu

statistics_menu

public java.awt.MenuItem statistics_menu

options

public java.awt.Menu options

vectors_menu

public java.awt.MenuItem vectors_menu

display_menu

public java.awt.MenuItem display_menu

debug

public static boolean debug

debug2

public static boolean debug2

x_window_graphics

public static java.awt.Graphics x_window_graphics

debug_graphics

public static java.awt.Graphics debug_graphics

bar_statistics_module

public static StatisticsModule bar_statistics_module

sliding_window_statistics_module

public static StatisticsModule sliding_window_statistics_module

window_width

public static double window_width

v_window_graphics

public java.awt.Graphics v_window_graphics

a_window_graphics

public java.awt.Graphics a_window_graphics

d_window_graphics

public java.awt.Graphics d_window_graphics

dd_dt_window_graphics

public java.awt.Graphics dd_dt_window_graphics

off_dimension

private java.awt.Dimension off_dimension

sequence_delay

public static long sequence_delay

FILTER_ON

public final boolean FILTER_ON

object_manager

private ObjectManager object_manager

control_module

private ControlModule control_module

Constructor Detail

Tablet

public Tablet(int max_data_points,
              double s,
              double avg_scale,
              java.lang.String cursor_image_name)

The constructor.

Method Detail

setDebugging

public void setDebugging(boolean d)

Set debugging mode

paint

public void paint(java.awt.Graphics g)

Overloaded for double buffering.

Overrides:

paint in class java.awt.Container

keyPressed

public void keyPressed(java.awt.event.KeyEvent k)

Handle key stroke events

Specified by:

keyPressed in interface java.awt.event.KeyListener

keyReleased

public void keyReleased(java.awt.event.KeyEvent k)

Handle key stroke events

Specified by:

keyReleased in interface java.awt.event.KeyListener

keyTyped

public void keyTyped(java.awt.event.KeyEvent k)

Handle key stroke events

Specified by:

keyTyped in interface java.awt.event.KeyListener

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent e)

Handle action events

Specified by:

actionPerformed in interface java.awt.event.ActionListener

mouseClicked

public void mouseClicked(java.awt.event.MouseEvent e)

Handle mouse events

Specified by:

mouseClicked in interface java.awt.event.MouseListener

mouseEntered

public void mouseEntered(java.awt.event.MouseEvent e)

Handle mouse events

Specified by:

mouseEntered in interface java.awt.event.MouseListener

mouseExited

public void mouseExited(java.awt.event.MouseEvent e)

Handle mouse events

Specified by:

mouseExited in interface java.awt.event.MouseListener

mousePressed

public void mousePressed(java.awt.event.MouseEvent e)

Handle mouse events

Specified by:

mousePressed in interface java.awt.event.MouseListener

reset

public void reset()

Reset the arrays

addPoint

public void addPoint(Point p,
                     long t)

Add a new point to points, and the corresponding time info to time. This method is solely for the purpose of making caching easier through abstraction. All changes to points[] and time[] is to be done through this method.

setRecognitionMode

public void setRecognitionMode(boolean flag)

Disable or enable recognition process by turning mouse event listening off or on. Set flag to be true if enabling is desired. Set flag to be false if disabling is desired.

invalidateCaches

public void invalidateCaches()

Invalidates caches

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent e)

Handle mouse events

Specified by:

mouseReleased in interface java.awt.event.MouseListener

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent e)

Handle mouse motion events

Specified by:

mouseDragged in interface java.awt.event.MouseMotionListener

clearScreen

public void clearScreen()

Clear screen

clearScreenStrong

public void clearScreenStrong()

Clear screen strong (works in debug mode).

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent e)

Handle mouse motion events

Specified by:

mouseMoved in interface java.awt.event.MouseMotionListener

update

public void update(java.awt.Graphics g)

Handle double buffering and do the real drawing.

Overrides:

update in class java.awt.Container

updateMain

public void updateMain()

Update the main graph.

updateVelocity

public void updateVelocity()

Update the velocity graph.

updateAcceleration

public void updateAcceleration()

Update the acceleration graph.

update_d

public void update_d()

Update the direction graph.

update_dd_dt

public void update_dd_dt()

Update change in direction

filter

public void filter()

Try to get rid of some of the noise.

deriveSpeed

public void deriveSpeed()

Derive speed, and fill in the speed array. This method should cache data in order to save computation.

getDataPoints

public Polygon getDataPoints()

Put the valid points in the points array in a Polygon and return it.

derivePolarCoordinates

public void derivePolarCoordinates()

Derive the polar coordinates of the points with respect to the center. Also determine the center, upper_right and lower right points (for surrounding rectangle).

deriveBoundingBox

public void deriveBoundingBox()

Derive the bounding box for thee points. Determine the center of the points, upper_right and lower right points (for surrounding rectangle).

deriveAcceleration

public void deriveAcceleration()

Derive acceleration, and fill in the acceleration array.

derive_d

public void derive_d()

Derive direction, and fill in the d array.

derive_dd_dt

public void derive_dd_dt()

Derive time derivative of direction, and fill in the dd_dt array.

averageSpeed

public double averageSpeed()

Average speed

test_circle

public boolean test_circle()

See if the input was meant to be a circle.

plot_output_circle

public void plot_output_circle()

Plot the recognized circle if one was recognized.

test_polygon

public boolean test_polygon()

See if the input is a polygon.

test_line

public boolean test_line()

See if the input is a line.

normalizePolygon

public void normalizePolygon()

Modify the polygon, so that the lines appear as the user wanted them to be (ie, get rid of the small rotations and shifts. (For example usually lines which look horizontal were meant to be perfectly horizontal.

combineEndPoints

public void combineEndPoints()

Combines the ends of the polygon if they are sufficiently close.

simplifyPolygon

public void simplifyPolygon()

Simplify the polygon to get rid of consecutive lines which are sufficiently parallel.

plot_output_line

public void plot_output_line()

Plot the recognized line if one was recognized.

plot_output_polygon

public void plot_output_polygon()

Plot the recognized polygon if one was recognized.

getPolygonIndices

public int[] getPolygonIndices()

calculate the lsq error.

leastSquaresForPolygon

public double leastSquaresForPolygon()

calculate the lsq error.

leastSquaresForCircle

public double leastSquaresForCircle()

calculate the lsq error.

sleep

public void sleep(int iterations)

Do useless work for some number of iterations specified by the argument.