vgp.tutor.lsystem
Class PaLSystem

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Panel
                    |
                    +--java.applet.Applet
                          |
                          +--vgp.tutor.lsystem.PaLSystem

All Implemented Interfaces:

javax.accessibility.Accessible, java.awt.image.ImageObserver, java.awt.MenuContainer, PsUpdateIf, java.io.Serializable

public class PaLSystem

extends java.applet.Applet

implements PsUpdateIf

Generate a tree with an L-system and display using turtle graphics. Additionally, this subclass implements the interface PsUpdateIf to catch events from a parameter slider.

Version:

17.02.00, 1.10 revised (kp) Slider added.
16.02.00, 1.00 created (kp)

Author:

Konrad Polthier

See Also:

Serialized Form

Inner classes inherited from class java.applet.Applet

java.applet.Applet.AccessibleApplet

Inner classes inherited from class java.awt.Panel

java.awt.Panel.AccessibleAWTPanel

Inner classes inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Inner classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent

Field Summary

protected PuDouble	m_delta Angle parameter used in L-system.
protected java.lang.String	m_descr Production of the L-system encoded with characters from alphabet {F,+,-,[,]}.
protected java.awt.Frame	m_frame Frame to allow applet to run as application too.
protected PgPolygonSet	m_polySet LSystem as collection of polygons.

Fields inherited from class java.awt.Component

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

PaLSystem()

Method Summary

PsUpdateIf	getFather() Method must be implemented to fulfill interface PsUpdateIf
void	init() The entry point for the applet automatically invoked by the browser.
static void	main(java.lang.String[] args) Standalone application support.
void	setParent(PsUpdateIf aParent) Method must be implemented to fulfill interface PsUpdateIf
boolean	update(java.lang.Object event) The variable m_delta sends update events to its parent to notify the parent whenever its value has changed by user interaction.

Methods inherited from class java.applet.Applet

destroy, getAccessibleContext, getAppletContext, getAppletInfo, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, getParameterInfo, isActive, newAudioClip, play, play, resize, resize, setStub, showStatus, start, stop

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paint, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setFont, setLayout, update, validate, validateTree

Methods inherited from class java.awt.Component

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface jv.object.PsUpdateIf

getName

Field Detail

m_frame

protected java.awt.Frame m_frame

Frame to allow applet to run as application too.

m_delta

protected PuDouble m_delta

Angle parameter used in L-system.

m_polySet

protected PgPolygonSet m_polySet

LSystem as collection of polygons.

m_descr

protected java.lang.String m_descr

Production of the L-system encoded with characters from alphabet {F,+,-,[,]}.

Constructor Detail

PaLSystem

public PaLSystem()

Method Detail

init

public void init()

The entry point for the applet automatically invoked by the browser. Method creates a string using an L-system and translates the string into a polygonSet using turtle graphics commands. Finally, the polygonSet is registered as geometry in a JavaView display.

Overrides:

init in class java.applet.Applet

update

public boolean update(java.lang.Object event)

The variable m_delta sends update events to its parent to notify the parent whenever its value has changed by user interaction. Method must be implemented to fulfill interface PsUpdateIf.

Specified by:

update in interface PsUpdateIf

Following copied from interface: jv.object.PsUpdateIf

Parameters:

event - carries a lot of information

Returns:

true if event has been handled, otherwise false

See Also:

PsObject, PsUpdateIf.getFather(), PsUpdateIf.setParent(PsUpdateIf)

getFather

public PsUpdateIf getFather()

Method must be implemented to fulfill interface PsUpdateIf

Specified by:

getFather in interface PsUpdateIf

Following copied from interface: jv.object.PsUpdateIf

See Also:

PsUpdateIf.setParent(PsUpdateIf), PsUpdateIf.update(Object)

setParent

public void setParent(PsUpdateIf aParent)

Method must be implemented to fulfill interface PsUpdateIf

Specified by:

setParent in interface PsUpdateIf

Following copied from interface: jv.object.PsUpdateIf

Parameters:

aParent - will receive events which this does not handle

See Also:

PsUpdateIf.getFather(), PsUpdateIf.update(Object)

main

public static void main(java.lang.String[] args)

Standalone application support. The main() method acts as the applet's entry point when it is run as a standalone application. It is ignored if the applet is run from within an HTML page.