jfrace.device
Class LCDDigit

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Canvas
              |
              +--jfrace.device.LCDDigit

All Implemented Interfaces:

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

public class LCDDigit

extends java.awt.Canvas

implements Device

A Device simulating an LCD digit. It is a write-only device which occupies one addressable unit. Only the five lower bits of data written to LCDDigit are evaluated where bit 0-3 codes the index of the segement which will be shown or hide depending on the value of bit 4. Here is the indexing scheme of the segments:

Author:

Franz-Josef Elmer

See Also:

Serialized Form

Inner classes inherited from class java.awt.Canvas

java.awt.Canvas.AccessibleAWTCanvas

Inner classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent

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

LCDDigit()

Method Summary

byte	getByte(int address) Nothing to read.
int	getNumberOfBits() Return 8.
int	getNumberOfUnits() Return 1.
int	getValue(int address) Nothing to read.
void	paint(java.awt.Graphics g) Paint visible display segments in the foreground color.
java.awt.Dimension	preferredSize()
void	reset() Reset display.
void	setByte(int address, byte value) Show or hide a segment.
void	setSegment(int index, boolean value) Show or hide a segment of the display.
void	setValue(int address, int value) Show or hide a segment.

Methods inherited from class java.awt.Canvas

addNotify, getAccessibleContext

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, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, getAlignmentX, getAlignmentY, getBackground, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getInputContext, getInputMethodRequests, getListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMinimumSize, getName, getParent, getPeer, getPreferredSize, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isDisplayable, isDoubleBuffered, isEnabled, isFocusTraversable, 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, prepareImage, prepareImage, print, printAll, processComponentEvent, processEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFont, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, update, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

LCDDigit

public LCDDigit()

Method Detail

preferredSize

public java.awt.Dimension preferredSize()

Overrides:

preferredSize in class java.awt.Component

setSegment

public void setSegment(int index,
                       boolean value)

Show or hide a segment of the display.

Parameters:

index - Index of the display. Has to be less than 16.

value - Segment will be shown/hide if true/false.

paint

public void paint(java.awt.Graphics g)

Paint visible display segments in the foreground color.

Overrides:

paint in class java.awt.Canvas

reset

public void reset()

Reset display. Hide all segments.

Specified by:

reset in interface Hardware

getNumberOfBits

public int getNumberOfBits()

Return 8.

Specified by:

getNumberOfBits in interface Hardware

getNumberOfUnits

public int getNumberOfUnits()

Return 1.

Specified by:

getNumberOfUnits in interface Device

getValue

public int getValue(int address)

Nothing to read. Return 0.

Specified by:

getValue in interface Device

Following copied from interface: jfrace.Device

Parameters:

address - Memory address.

Returns:

the value.

setValue

public void setValue(int address,
                     int value)

Show or hide a segment. The four lower bits of value code the index of the segment whereas bit 4 codes whether the segment has to be shown or hide.

Specified by:

setValue in interface Device

Parameters:

address - Will be ignored.

value - Segment index and visibility flag.

getByte

public byte getByte(int address)

Nothing to read. Return 0.

Specified by:

getByte in interface Device

Following copied from interface: jfrace.Device

Parameters:

address - Memory address.

Returns:

the value of the byte at address.

setByte

public void setByte(int address,
                    byte value)

Show or hide a segment. The four lower bits of value code the index of the segment whereas bit 4 codes whether the segment has to be shown or hide.

Specified by:

setByte in interface Device

Parameters:

address - Will be ignored.

value - Segment index and visibility flag.