cs101.awt
Class ColorField

java.lang.Object
  java.awt.Component
      java.awt.Canvas
          cs101.awt.ColorField

All Implemented Interfaces:

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

Direct Known Subclasses:

DisplayField

public class ColorField

extends java.awt.Canvas

cs101.awt.ColorField provides a colored rectangle that operates as an awt.component.

The color field is setup to have two different states represented by two different colors. The field can be of any size or color.

Copyright (c) 1998 Massachusetts Institute of Technolgoy

Version:

$Id: ColorField.java,v 1.1.1.1 2002/06/05 21:56:32 root Exp $

Author:

Todd C. Parnell, tparnell@ai.mit.edu, Joshua R. Brown, reuben@ai.mit.edu

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class java.awt.Canvas

java.awt.Canvas.AccessibleAWTCanvas

Nested classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

protected java.awt.Dimension	dim size of the field
protected java.awt.Color	falseColor color when state == false
protected boolean	state determines the color of the field
protected java.awt.Color	trueColor color when state == true

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

ColorField()
Constructs a rectangular color field with default values for all attibutes.

ColorField(boolean initState, java.awt.Dimension dim, java.awt.Color trueColor, java.awt.Color falseColor)
Constructs a rectangular colorfield with the passed attributes.

Method Summary

void	changeState(boolean newState) Changes the state of the color field to the value passed in.
java.awt.Dimension	getMinimumSize() Called by this object's container to determine the minimum space required by this object.
java.awt.Dimension	getPreferredSize() Called by this object's container to determine the minimum space required by this object.
void	paint(java.awt.Graphics g) Draws the color field on the screen in it's current state

Methods inherited from class java.awt.Canvas

addNotify, createBufferStrategy, createBufferStrategy, getAccessibleContext, getBufferStrategy, update

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, getAlignmentX, getAlignmentY, getBackground, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeys, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusCycleRoot, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, layout, list, list, list, list, list, locate, location, lostFocus, minimumSize, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, paramString, postEvent, preferredSize, prepareImage, prepareImage, print, printAll, processComponentEvent, processEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys, setFocusTraversalKeysEnabled, setFont, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle, validate

Methods inherited from class java.lang.Object

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

Field Detail

state

protected boolean state

determines the color of the field

dim

protected java.awt.Dimension dim

size of the field

trueColor

protected java.awt.Color trueColor

color when state == true

falseColor

protected java.awt.Color falseColor

color when state == false

Constructor Detail

ColorField

public ColorField()

Constructs a rectangular color field with default values for all attibutes.
o Initial state = false
o Dimension = 25 X 25
o Color when state is true = green
o Color when state is false = red

ColorField

public ColorField(boolean initState,
                  java.awt.Dimension dim,
                  java.awt.Color trueColor,
                  java.awt.Color falseColor)

Constructs a rectangular colorfield with the passed attributes.

Parameters:

initState - The initial state of the color field.

dim - The dimensions of the color field.

trueColor - The color of the field when the state is true.

falseColor - The color of the field when the state is false.

Method Detail

changeState

public void changeState(boolean newState)

Changes the state of the color field to the value passed in. Changing the state of the field will cause the field to repainted in the appropriate color. If the state is unchanged nothing happens.

Parameters:

newState - The new state of the color field.

paint

public void paint(java.awt.Graphics g)

Draws the color field on the screen in it's current state

Parameters:

g - The graphics context to paint into.

getMinimumSize

public java.awt.Dimension getMinimumSize()

Called by this object's container to determine the minimum space required by this object.

Returns:

the minimum size of the object

getPreferredSize

public java.awt.Dimension getPreferredSize()

Called by this object's container to determine the minimum space required by this object.

Returns:

the prefered size of the object