Class TurtleBox

java.lang.Object
  java.awt.Component
      java.awt.Container
          java.awt.Window
              java.awt.Frame
                  javax.swing.JFrame
                      TurtleBox

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, Accessible, RootPaneContainer, WindowConstants

public class TurtleBox
extends JFrame

TurtleBox is a small class which implements a kind of "Logo".

See Also:

Serialized Form

Nested Class Summary

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

JFrame.AccessibleJFrame

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

Frame.AccessibleAWTFrame

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

Window.AccessibleAWTWindow

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

protected double	angle
protected Vector<Vector<Integer>>	elements This data structure contains the different elements to move.
private static int	LINE
private static int	MOVE
protected boolean	penIsDown
protected int	speed
protected JPanel	surface
protected boolean	turtleHidden
protected Point2D.Double	turtlePos

Fields inherited from class javax.swing.JFrame

accessibleContext, EXIT_ON_CLOSE, rootPane, rootPaneCheckingEnabled

Fields inherited from class java.awt.Frame

CROSSHAIR_CURSOR, DEFAULT_CURSOR, E_RESIZE_CURSOR, HAND_CURSOR, ICONIFIED, MAXIMIZED_BOTH, MAXIMIZED_HORIZ, MAXIMIZED_VERT, MOVE_CURSOR, N_RESIZE_CURSOR, NE_RESIZE_CURSOR, NORMAL, NW_RESIZE_CURSOR, S_RESIZE_CURSOR, SE_RESIZE_CURSOR, SW_RESIZE_CURSOR, TEXT_CURSOR, W_RESIZE_CURSOR, WAIT_CURSOR

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface javax.swing.WindowConstants

DISPOSE_ON_CLOSE, DO_NOTHING_ON_CLOSE, HIDE_ON_CLOSE

Fields inherited from interface java.awt.image.ImageObserver

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

Constructor Summary

TurtleBox(int width, int height)
Constructs a new TurtleBox

Method Summary

private void	addElement(int kind, double x1, double y1, double x2, double y2) adds an element to the list
void	backward(double pixels) Moves the turtle by some pixels backwards
void	clear() Clear drawing surface (turtle remains at the same position)
private void	drawThickLine(Graphics g, double x1, double y1, double x2, double y2, int thickness, Color c) Method for drawing a thick line in Java.
private void	drawTurtle(Graphics2D graphics, Color innerColor, Color outerColor) Draws the turtle with given colors
void	forward(double pixels) Forward the turtle by some pixels
private double	getAngle() Get the actual angle of the turtle (in degrees)
private void	gotoXY(double x, double y) Positions the turtle to a given place
void	hideTurtle() Hides the turtle
void	home() Set turtle back to home position and orientation
void	left(double angle) Turns the turle left
static void	main(String[] args) The main entry point for executing this program.
void	paint(Graphics graphics) Paints the box with stored elements
void	penDown() Takes the pen down (draw while moving)
void	penUp() Takes the pen up (move without drawing)
void	right(double angle) Turns the turle right
private void	setAngle(double angle) Sets a new angle for the turtle (in degrees)
void	setSpeed(int pSpeed) Sets the drawing speed to a value between 0 and 100
void	showTurtle() Shows the turtle

Methods inherited from class javax.swing.JFrame

addImpl, createRootPane, frameInit, getAccessibleContext, getContentPane, getDefaultCloseOperation, getGlassPane, getGraphics, getJMenuBar, getLayeredPane, getRootPane, getTransferHandler, isDefaultLookAndFeelDecorated, isRootPaneCheckingEnabled, paramString, processWindowEvent, remove, repaint, setContentPane, setDefaultCloseOperation, setDefaultLookAndFeelDecorated, setGlassPane, setIconImage, setJMenuBar, setLayeredPane, setLayout, setRootPane, setRootPaneCheckingEnabled, setTransferHandler, update

Methods inherited from class java.awt.Frame

addNotify, getCursorType, getExtendedState, getFrames, getIconImage, getMaximizedBounds, getMenuBar, getState, getTitle, isResizable, isUndecorated, remove, removeNotify, setCursor, setExtendedState, setMaximizedBounds, setMenuBar, setResizable, setState, setTitle, setUndecorated

Methods inherited from class java.awt.Window

addPropertyChangeListener, addPropertyChangeListener, addWindowFocusListener, addWindowListener, addWindowStateListener, applyResourceBundle, applyResourceBundle, createBufferStrategy, createBufferStrategy, dispose, getBufferStrategy, getFocusableWindowState, getFocusCycleRootAncestor, getFocusOwner, getFocusTraversalKeys, getGraphicsConfiguration, getIconImages, getInputContext, getListeners, getLocale, getModalExclusionType, getMostRecentFocusOwner, getOwnedWindows, getOwner, getOwnerlessWindows, getToolkit, getWarningString, getWindowFocusListeners, getWindowListeners, getWindows, getWindowStateListeners, hide, isActive, isAlwaysOnTop, isAlwaysOnTopSupported, isFocusableWindow, isFocusCycleRoot, isFocused, isLocationByPlatform, isShowing, pack, postEvent, processEvent, processWindowFocusEvent, processWindowStateEvent, removeWindowFocusListener, removeWindowListener, removeWindowStateListener, reshape, setAlwaysOnTop, setBounds, setBounds, setCursor, setFocusableWindowState, setFocusCycleRoot, setIconImages, setLocationByPlatform, setLocationRelativeTo, setMinimumSize, setModalExclusionType, setSize, setSize, setVisible, show, toBack, toFront

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalPolicy, getInsets, getLayout, getMaximumSize, getMinimumSize, getMousePosition, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, print, printComponents, processContainerEvent, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, transferFocusBackward, 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, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resize, resize, setBackground, setComponentOrientation, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setName, setPreferredSize, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.awt.MenuContainer

getFont, postEvent

Field Detail

LINE

private static final int LINE

See Also:

Constant Field Values

MOVE

private static final int MOVE

See Also:

Constant Field Values

surface

protected JPanel surface

turtlePos

protected Point2D.Double turtlePos

turtleHidden

protected boolean turtleHidden

penIsDown

protected boolean penIsDown

angle

protected double angle

speed

protected int speed

elements

protected Vector<Vector<Integer>> elements

This data structure contains the different elements to move. Let's admit, that this approach IS NOT object oriented, but the goal was to achive a TurtleBox in a single file without using inner classes.

The inner vector contains alway 5 elements: the type of the element as well as the starting and ending coordinates.

Constructor Detail

TurtleBox

public TurtleBox(int width,
                 int height)

Constructs a new TurtleBox

Parameters:

width - the width of the box

height - the height of the box

Method Detail

drawThickLine

private void drawThickLine(Graphics g,
                           double x1,
                           double y1,
                           double x2,
                           double y2,
                           int thickness,
                           Color c)

Method for drawing a thick line in Java.
http://www.rgagnon.com/javadetails/java-0260.html

drawTurtle

private void drawTurtle(Graphics2D graphics,
                        Color innerColor,
                        Color outerColor)

Draws the turtle with given colors

paint

public void paint(Graphics graphics)

Paints the box with stored elements

Overrides:

paint in class Container

getAngle

private double getAngle()

Get the actual angle of the turtle (in degrees)

setAngle

private void setAngle(double angle)

Sets a new angle for the turtle (in degrees)

Parameters:

angle - the angle given in degree

setSpeed

public void setSpeed(int pSpeed)

Sets the drawing speed to a value between 0 and 100

Parameters:

pSpeed - the new speed value

left

public void left(double angle)

Turns the turle left

Parameters:

angle - the angle to turn left

right

public void right(double angle)

Turns the turle right

Parameters:

angle - the angle to turn right

hideTurtle

public void hideTurtle()

Hides the turtle

showTurtle

public void showTurtle()

Shows the turtle

penUp

public void penUp()

Takes the pen up (move without drawing)

penDown

public void penDown()

Takes the pen down (draw while moving)

addElement

private void addElement(int kind,
                        double x1,
                        double y1,
                        double x2,
                        double y2)

adds an element to the list

Parameters:

kind - MOVE or LINE

x1,y1,x2,y2 - coords of new element

forward

public void forward(double pixels)

Forward the turtle by some pixels

Parameters:

pixels - the number of pixels the turtle has to move

backward

public void backward(double pixels)

Moves the turtle by some pixels backwards

Parameters:

pixels - the number of pixels the turtle has to move backwards

gotoXY

private void gotoXY(double x,
                    double y)

Positions the turtle to a given place

Parameters:

x - the X coordinate

y - the Y coordinate

clear

public void clear()

Clear drawing surface (turtle remains at the same position)

home

public void home()

Set turtle back to home position and orientation

main

public static void main(String[] args)

The main entry point for executing this program.