Package com.singularsys.jepexamples.applets

Class ParametrisedCanvas

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JPanel

com.singularsys.jepexamples.applets.AbstractCanvas

com.singularsys.jepexamples.applets.ParametrisedCanvas

All Implemented Interfaces:

ComponentListener, KeyListener, MouseListener, MouseMotionListener, MouseWheelListener, ImageObserver, MenuContainer, Serializable, EventListener, Accessible

public class ParametrisedCanvas
extends AbstractCanvas

This class plots parametrised curves specified by two Jep expressions.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.JPanel

JPanel.AccessibleJPanel

Nested classes/interfaces inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

Fields

Modifier and Type	Field	Description
protected final Jep	jep	Math parser
protected Variable	t	"x" variable
protected Node	xExpression	Expression to evaluate
protected Node	yExpression

Fields inherited from class com.singularsys.jepexamples.applets.AbstractCanvas

axisColor, bgColor, cenX, cenY, defaultOffX, defaultOffY, defaultScaleX, defaultScaleY, dimensions, gridColor, labelColor, labelFont, lastpos, offX, offY, popup, scaleFont, scaleX, scaleY, showGrid, showScale, showTime, strategy

Fields inherited from class javax.swing.JComponent

listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Constructors

Constructor	Description
ParametrisedCanvas(Jep jep, Variable t, double min, double max, int steps)

Method Summary

Modifier and Type	Method	Description
void	dump()	Dump the coordinates on the standard output
protected long	getNumPts()	The number of points which are calculated
Variable	getT()
double	getTMax()
double	getTMin()
int	getTSteps()
Node	getXExpression()
protected double	getXValue(double tValue)
Node	getYExpression()
protected double	getYValue(double tValue)
protected void	paintCurve(Graphics g)	Paints the graph of the function.
void	rescaled()	Called when scale or offset changed Default action is to call repaint
void	setRange(double min, double max, int steps)
void	setT(Variable t)
void	setXExpression(Node xExpr)
void	setYExpression(Node yExpr)

Methods inherited from class com.singularsys.jepexamples.applets.AbstractCanvas

center, clipX, clipY, componentHidden, componentMoved, componentResized, componentShown, getOffX, getOffY, getPopup, getScaleX, getScaleY, keyPressed, keyReleased, keyTyped, mouseClicked, mouseDragged, mouseEntered, mouseExited, mouseMoved, mousePressed, mouseReleased, mouseWheelMoved, paint, paintAxes, paintCanvas, paintGrid, paintScale, paintTime, paintWhite, reset, resetCanvas, resized, setOffset, setScale, shiftCanvas, update, xAbsolute, xRelative, yAbsolute, yRelative, zoomCanvas

Methods inherited from class javax.swing.JPanel

getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Field Details

jep

protected final Jep jep

Math parser

xExpression

protected Node xExpression

Expression to evaluate

yExpression

protected Node yExpression

t

protected Variable t

"x" variable

Constructor Details

ParametrisedCanvas

public ParametrisedCanvas(Jep jep,
 Variable t,
 double min,
 double max,
 int steps)

Parameters:

jep - The Jep instance

t - A Variable object holding the parameter

min - minimum value for parameter

max - maximum value for parameter

steps - number of line segments to draw

Method Details

getT

public Variable getT()

setT

public void setT(Variable t)

getXExpression

public Node getXExpression()

getYExpression

public Node getYExpression()

setXExpression

public void setXExpression(Node xExpr)

setYExpression

public void setYExpression(Node yExpr)

getTMin

public double getTMin()

getTMax

public double getTMax()

getTSteps

public int getTSteps()

setRange

public void setRange(double min,
 double max,
 int steps)

getYValue

protected double getYValue(double tValue)

Returns:

The value of the function at an x value of the parameter. NaN on errors

getXValue

protected double getXValue(double tValue)

paintCurve

protected void paintCurve(Graphics g)

Paints the graph of the function. A null argument cause the values to be dumped to stdout.

Specified by:

paintCurve in class AbstractCanvas

rescaled

public void rescaled()

Description copied from class: AbstractCanvas

Called when scale or offset changed Default action is to call repaint

Overrides:

rescaled in class AbstractCanvas

dump

public void dump()

Dump the coordinates on the standard output

Specified by:

dump in class AbstractCanvas

getNumPts

protected long getNumPts()

Description copied from class: AbstractCanvas

The number of points which are calculated

Specified by:

getNumPts in class AbstractCanvas

Returns:

the number of points