windows
Class WindowWithVideo

java.lang.Object
  java.awt.Component
      java.awt.Container
          java.awt.Panel
              java.applet.Applet
                  javax.swing.JApplet
                      windows.WindowWithListeners
                          windows.WindowWithVideo

All Implemented Interfaces:

javax.accessibility.Accessible, java.util.EventListener, java.awt.image.ImageObserver, java.awt.event.KeyListener, java.awt.MenuContainer, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, javax.swing.RootPaneContainer, java.io.Serializable, VideoListener, java.awt.event.WindowListener

Direct Known Subclasses:

PixelOperater

public class WindowWithVideo

extends WindowWithListeners

implements VideoListener

Author:

DanO This is a sample class that students can extend to create interesting web cams

See Also:

Serialized Form

Field Summary

long	elapsedTime This is handy for testing performance
java.lang.String	prefsFileName
PixelSource	ps This is reference to a PixelSource object from vxp.jar
long	startTime

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

WindowWithVideo(java.lang.String[] _args, int _w, int _h)
This is the constructor

Method Summary

void	destroy() You always need to clean up
void	init() This is a method that you promised to have as a KeyListener.
void	initVideo() This cranks up the video by creating a pixelSource object.
void	keyPressed(java.awt.event.KeyEvent e)
static void	main(java.lang.String[] args) The is the entry point for your program You will definitely want to override this and then get out of it as soon as possible
void	newFrame() This is the method that pixel source uses to tell you that a new frame is ready.
void	paint(java.awt.Graphics g) This gets called everytime you repaint the screen.
void	start() Separated this out from init video because you get a lot of null pointer exceptions when you start hearing back from the video before all your buffers are set up right You can't set up your buffers until you construct the video in case they need to be a little bigger than you expected as the case on the mac.
void	update(java.awt.Graphics g) This overrides the update method of JFrame which gets called on repaint.
void	useParameters(java.util.HashMap _paramNamesAndValues)

Methods inherited from class windows.WindowWithListeners

addParameterNames, applicationStuff, getParameters, getParameters, isApplication, keyReleased, keyTyped, mouseClicked, mouseDragged, mouseEntered, mouseExited, mouseMoved, mousePressed, mouseReleased, put, setFullScreen, setTitle, windowActivated, windowClosed, windowClosing, windowDeactivated, windowDeiconified, windowIconified, windowOpened

Methods inherited from class javax.swing.JApplet

getAccessibleContext, getContentPane, getGlassPane, getJMenuBar, getLayeredPane, getRootPane, remove, setContentPane, setGlassPane, setJMenuBar, setLayeredPane, setLayout

Methods inherited from class java.applet.Applet

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

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, print, printComponents, remove, removeAll, removeContainerListener, removeNotify, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFont, transferFocusBackward, transferFocusDownCycle, validate

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, dispatchEvent, enable, enable, enableInputMethods, getBackground, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, 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, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocusInWindow, reshape, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

ps

public PixelSource ps

This is reference to a PixelSource object from vxp.jar

elapsedTime

public long elapsedTime

This is handy for testing performance

startTime

public long startTime

prefsFileName

public java.lang.String prefsFileName

Constructor Detail

WindowWithVideo

public WindowWithVideo(java.lang.String[] _args,
                       int _w,
                       int _h)

This is the constructor

Method Detail

initVideo

public void initVideo()

This cranks up the video by creating a pixelSource object. It also subscribes to the video listener, of course I would have to have previously promised to implement a VideoListener and then implement "newFrame" You might consider overriding this if you want a different kind of video object or don't want to subscribe to the notification service.

start

public void start()

Separated this out from init video because you get a lot of null pointer exceptions when you start hearing back from the video before all your buffers are set up right You can't set up your buffers until you construct the video in case they need to be a little bigger than you expected as the case on the mac.

main

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

The is the entry point for your program You will definitely want to override this and then get out of it as soon as possible

destroy

public void destroy()

You always need to clean up

Overrides:

destroy in class WindowWithListeners

newFrame

public void newFrame()

This is the method that pixel source uses to tell you that a new frame is ready. You have to have this if you want to implement a VideoListener

Specified by:

newFrame in interface VideoListener

update

public void update(java.awt.Graphics g)

This overrides the update method of JFrame which gets called on repaint. The reason I don't like JFrames is because it clears the screen (which I don't need) and creates flicker doing it. I redo the method with a paint but no clear

paint

public void paint(java.awt.Graphics g)

This gets called everytime you repaint the screen. You would want to override this if you want anything but side by side pictures

init

public void init()

This is a method that you promised to have as a KeyListener. For homework you might try to replace the last part with different input than a keystroke

Overrides:

init in class WindowWithListeners

keyPressed

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

Specified by:

keyPressed in interface java.awt.event.KeyListener

Overrides:

keyPressed in class WindowWithListeners

useParameters

public void useParameters(java.util.HashMap _paramNamesAndValues)

Overrides:

useParameters in class WindowWithListeners