de.mud.terminal
Class VDU

java.lang.Object
  |
  +--java.awt.Component
        |
        +--de.mud.terminal.VDU

All Implemented Interfaces:

java.util.EventListener, java.awt.image.ImageObserver, java.awt.MenuContainer, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.io.Serializable

Direct Known Subclasses:

vt320

public class VDU

extends java.awt.Component

implements java.awt.event.MouseListener, java.awt.event.MouseMotionListener

Video Display Unit emulation. This class implements all necessary features of a character display unit, but not the actual terminal emulation. It can be used as the base for terminal emulations of any kind.

This is a lightweight component. It will render very badly if used in standard AWT components without overloaded update() method. The update() method must call paint() immediately without clearing the components graphics context or parts of the screen will simply disappear.

Maintainer: Matthias L. Jugel

Version:

$Id: VDU.java,v 2.50 2002/03/01 15:30:17 leo Exp $

Author:

Matthias L. Jugel, Marcus Meißner

See Also:

Serialized Form

Inner classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent

Field Summary

static int	BOLD Make character bold.
static int	COLOR
static int	COLOR_0
static int	COLOR_1
static int	COLOR_2
static int	COLOR_3
static int	COLOR_4
static int	COLOR_5
static int	COLOR_6
static int	COLOR_7
static int	COLOR_BG
static int	COLOR_BOLD
static int	COLOR_FG
static int	COLOR_INVERT
static int	debug Enable debug messages.
static java.lang.String	ID The current version id tag
static int	INVERT Invert character.
static int	LOW Lower intensity character.
static int	NORMAL Make character normal.
static int	RESIZE_FONT Resize the font to the new screen size.
static int	RESIZE_NONE Do nothing when the component is resized.
static int	RESIZE_SCREEN Resize the width and height of the character screen.
static boolean	SCROLL_DOWN Scroll down when inserting a line.
static boolean	SCROLL_UP Scroll up when inserting a line.
static int	UNDERLINE Underline character.

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

VDU()
Create a display unit with size 80x24 and Font "Monospaced", size 12.

VDU(java.awt.Font font)
Create a display with the font passed and size 80x24.

VDU(int width, int height)
Create a display unit with specific size, Font is "Monospaced", size 12.

VDU(int width, int height, java.awt.Font font)
Create a new video display unit with the passed width and height in characters using a special font and font size.

Method Summary

void	addFocusListener(java.awt.event.FocusListener listener)
void	addKeyListener(java.awt.event.KeyListener listener) Add a key listener to the VDU.
void	addMouseListener(java.awt.event.MouseListener listener) Add a mouse listener to the VDU.
void	addMouseMotionListener(java.awt.event.MouseMotionListener listener) Add a mouse motion listener to the VDU.
void	clearSelection()
void	deleteArea(int c, int l, int w, int h) Delete a rectangular portion of the screen.
void	deleteArea(int c, int l, int w, int h, int curAttr) Delete a rectangular portion of the screen.
void	deleteChar(int c, int l) Delete a character at a given position on the screen.
void	deleteLine(int l) Delete a line at a specific position.
int	getAttributes(int c, int l) Get the attributes for the specified position.
int	getBottomMargin() Get the bottom scroll margin.
int	getBufferSize() Retrieve current scrollback buffer size.
char	getChar(int c, int l) Get the character at the specified position.
java.awt.Color[]	getColorSet()
int	getColumns() Get amount of columns on the screen.
java.awt.Dimension	getCursorPosition() Get the current cursor position.
java.awt.Insets	getInsets() The insets of the character display define the border.
int	getMaxBufferSize() Retrieve maximum buffer Size.
java.awt.Dimension	getPreferredSize() Return the preferred Size of the character display.
int	getRows() Get amount of rows on the screen.
java.awt.Dimension	getScreenSize() Get the screen size in rows and columns.
java.lang.String	getSelection()
java.awt.Dimension	getSize() Return the real size in points of the character display.
int	getTopMargin() Get the top scroll margin.
int	getWindowBase() Get the current window base.
void	insertChar(int c, int l, char ch, int attributes) Insert a character at a specific position on the screen.
void	insertLine(int l) Insert a blank line at a specific position.
void	insertLine(int l, boolean scrollDown) Insert a blank line at a specific position.
void	insertLine(int l, int n) Insert blank lines at a specific position.
void	insertLine(int l, int n, boolean scrollDown) Insert blank lines at a specific position.
void	markLine(int l, int n) Mark lines to be updated with redraw().
void	mouseClicked(java.awt.event.MouseEvent evt)
void	mouseDragged(java.awt.event.MouseEvent evt)
void	mouseEntered(java.awt.event.MouseEvent evt)
void	mouseExited(java.awt.event.MouseEvent evt)
java.awt.Point	mouseGetPos(java.awt.Point evtpt) Convert Mouse Event coordinates into character cell coordinates
void	mouseMoved(java.awt.event.MouseEvent evt)
void	mousePressed(java.awt.event.MouseEvent evt) Handle mouse pressed events for copy & paste.
void	mouseReleased(java.awt.event.MouseEvent evt) Handle mouse released events for copy & paste.
void	paint(java.awt.Graphics g) Paint the current screen using the backing store image.
void	print(java.awt.Graphics g)
void	processFocusEvent(java.awt.event.FocusEvent evt)
void	processKeyEvent(java.awt.event.KeyEvent evt) Process key events for this component.
void	processMouseEvent(java.awt.event.MouseEvent evt) Process mouse events for this component.
void	processMouseMotionEvent(java.awt.event.MouseEvent evt) Process mouse motion events for this component.
void	putChar(int c, int l, char ch) Put a character on the screen with normal font and outline.
void	putChar(int c, int l, char ch, int attributes) Put a character on the screen with specific font and outline.
void	putString(int c, int l, java.lang.String s) Put a String at a specific position.
void	putString(int c, int l, java.lang.String s, int attributes) Put a String at a specific position giving all characters the same attributes.
void	redraw() Redraw marked lines.
protected void	redraw(java.awt.Graphics g)
void	removeFocusListener(java.awt.event.FocusListener listener)
void	removeKeyListener(java.awt.event.KeyListener listener) Remove key listener from the VDU.
void	removeMouseListener(java.awt.event.MouseListener listener) Remove a mouse listener to the VDU.
void	removeMouseMotionListener(java.awt.event.MouseMotionListener listener) Remove a mouse motion listener to the VDU.
void	setBorder(int thickness, boolean raised) Set the border thickness and the border type.
void	setBottomMargin(int l) Set the bottom scroll margin for the screen.
void	setBounds(int x, int y, int w, int h) Reshape character display according to resize strategy.
void	setBufferSize(int amount) Set scrollback buffer size.
void	setColorPrinting(boolean colorPrint) Set default for printing black&white or colorized as displayed on screen.
void	setColorSet(java.awt.Color[] colorset)
void	setCursorColors(java.awt.Color fg, java.awt.Color bg) Set cursor FG and BG colors
void	setCursorPosition(int c, int l) Puts the cursor at the specified position.
void	setFont(java.awt.Font font) Set the font to be used for rendering the characters on screen.
void	setResizeStrategy(int strategy) Set the strategy when window is resized.
void	setScreenSize(int width, int height) Change the size of the screen.
void	setScrollbar(java.awt.Scrollbar scrollBar) Connect a scrollbar to the VDU.
void	setTopMargin(int l) Set the top scroll margin for the screen.
void	setWindowBase(int line) Set the current window base.
void	showCursor(boolean doshow)

Methods inherited from class java.awt.Component

action, add, addComponentListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, getAccessibleContext, 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, 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, preferredSize, prepareImage, prepareImage, printAll, processComponentEvent, processEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, remove, removeComponentListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, resize, resize, setBackground, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, 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

Field Detail

ID

public static final java.lang.String ID

The current version id tag

debug

public static final int debug

Enable debug messages.

COLOR_0

public static final int COLOR_0

COLOR_1

public static final int COLOR_1

COLOR_2

public static final int COLOR_2

COLOR_3

public static final int COLOR_3

COLOR_4

public static final int COLOR_4

COLOR_5

public static final int COLOR_5

COLOR_6

public static final int COLOR_6

COLOR_7

public static final int COLOR_7

COLOR_BOLD

public static final int COLOR_BOLD

COLOR_INVERT

public static final int COLOR_INVERT

COLOR

public static final int COLOR

COLOR_FG

public static final int COLOR_FG

COLOR_BG

public static final int COLOR_BG

SCROLL_UP

public static final boolean SCROLL_UP

Scroll up when inserting a line.

SCROLL_DOWN

public static final boolean SCROLL_DOWN

Scroll down when inserting a line.

RESIZE_NONE

public static final int RESIZE_NONE

Do nothing when the component is resized.

RESIZE_SCREEN

public static final int RESIZE_SCREEN

Resize the width and height of the character screen.

RESIZE_FONT

public static final int RESIZE_FONT

Resize the font to the new screen size.

NORMAL

public static final int NORMAL

Make character normal.

BOLD

public static final int BOLD

Make character bold.

UNDERLINE

public static final int UNDERLINE

Underline character.

INVERT

public static final int INVERT

Invert character.

LOW

public static final int LOW

Lower intensity character.

Constructor Detail

VDU

public VDU(int width,
           int height,
           java.awt.Font font)

Create a new video display unit with the passed width and height in characters using a special font and font size. These features can be set independently using the appropriate properties.

Parameters:

width - the length of the character lines

height - the amount of lines on the screen

font - the font to be used (usually Monospaced)

VDU

public VDU(int width,
           int height)

Create a display unit with specific size, Font is "Monospaced", size 12.

Parameters:

width - the length of the character lines

height - the amount of lines on the screen

VDU

public VDU(java.awt.Font font)

Create a display with the font passed and size 80x24.

Parameters:

font - the font to be used (usually Monospaced)

VDU

public VDU()

Create a display unit with size 80x24 and Font "Monospaced", size 12.

Method Detail

setColorSet

public void setColorSet(java.awt.Color[] colorset)

getColorSet

public java.awt.Color[] getColorSet()

putChar

public void putChar(int c,
                    int l,
                    char ch)

Put a character on the screen with normal font and outline. The character previously on that position will be overwritten. You need to call redraw() to update the screen.

Parameters:

c - x-coordinate (column)

l - y-coordinate (line)

ch - the character to show on the screen

See Also:

insertChar(int, int, char, int), deleteChar(int, int), redraw()

putChar

public void putChar(int c,
                    int l,
                    char ch,
                    int attributes)

Put a character on the screen with specific font and outline. The character previously on that position will be overwritten. You need to call redraw() to update the screen.

Parameters:

c - x-coordinate (column)

l - y-coordinate (line)

ch - the character to show on the screen

attributes - the character attributes

See Also:

BOLD, UNDERLINE, INVERT, NORMAL, insertChar(int, int, char, int), deleteChar(int, int), redraw()

getChar

public char getChar(int c,
                    int l)

Get the character at the specified position.

Parameters:

c - x-coordinate (column)

l - y-coordinate (line)

See Also:

putChar(int, int, char)

getAttributes

public int getAttributes(int c,
                         int l)

Get the attributes for the specified position.

Parameters:

c - x-coordinate (column)

l - y-coordinate (line)

See Also:

putChar(int, int, char)

insertChar

public void insertChar(int c,
                       int l,
                       char ch,
                       int attributes)

Insert a character at a specific position on the screen. All character right to from this position will be moved one to the right. You need to call redraw() to update the screen.

Parameters:

c - x-coordinate (column)

l - y-coordinate (line)

ch - the character to insert

attributes - the character attributes

See Also:

BOLD, UNDERLINE, INVERT, NORMAL, putChar(int, int, char), deleteChar(int, int), redraw()

deleteChar

public void deleteChar(int c,
                       int l)

Delete a character at a given position on the screen. All characters right to the position will be moved one to the left. You need to call redraw() to update the screen.

Parameters:

c - x-coordinate (column)

l - y-coordinate (line)

See Also:

putChar(int, int, char), insertChar(int, int, char, int), redraw()

putString

public void putString(int c,
                      int l,
                      java.lang.String s)

Put a String at a specific position. Any characters previously on that position will be overwritten. You need to call redraw() for screen update.

Parameters:

c - x-coordinate (column)

l - y-coordinate (line)

s - the string to be shown on the screen

See Also:

BOLD, UNDERLINE, INVERT, NORMAL, putChar(int, int, char), insertLine(int), deleteLine(int), redraw()

putString

public void putString(int c,
                      int l,
                      java.lang.String s,
                      int attributes)

Put a String at a specific position giving all characters the same attributes. Any characters previously on that position will be overwritten. You need to call redraw() to update the screen.

Parameters:

c - x-coordinate (column)

l - y-coordinate (line)

s - the string to be shown on the screen

attributes - character attributes

See Also:

BOLD, UNDERLINE, INVERT, NORMAL, putChar(int, int, char), insertLine(int), deleteLine(int), redraw()

insertLine

public void insertLine(int l)

Insert a blank line at a specific position. The current line and all previous lines are scrolled one line up. The top line is lost. You need to call redraw() to update the screen.

Parameters:

l - the y-coordinate to insert the line

See Also:

deleteLine(int), redraw()

insertLine

public void insertLine(int l,
                       int n)

Insert blank lines at a specific position. You need to call redraw() to update the screen

Parameters:

l - the y-coordinate to insert the line

n - amount of lines to be inserted

See Also:

deleteLine(int), redraw()

insertLine

public void insertLine(int l,
                       boolean scrollDown)

Insert a blank line at a specific position. Scroll text according to the argument. You need to call redraw() to update the screen

Parameters:

l - the y-coordinate to insert the line

scrollDown - scroll down

See Also:

deleteLine(int), SCROLL_UP, SCROLL_DOWN, redraw()

insertLine

public void insertLine(int l,
                       int n,
                       boolean scrollDown)

Insert blank lines at a specific position. The current line and all previous lines are scrolled one line up. The top line is lost. You need to call redraw() to update the screen.

Parameters:

l - the y-coordinate to insert the line

n - number of lines to be inserted

scrollDown - scroll down

See Also:

deleteLine(int), SCROLL_UP, SCROLL_DOWN, redraw()

deleteLine

public void deleteLine(int l)

Delete a line at a specific position. Subsequent lines will be scrolled up to fill the space and a blank line is inserted at the end of the screen.

Parameters:

l - the y-coordinate to insert the line

See Also:

deleteLine(int)

deleteArea

public void deleteArea(int c,
                       int l,
                       int w,
                       int h,
                       int curAttr)

Delete a rectangular portion of the screen. You need to call redraw() to update the screen.

Parameters:

c - x-coordinate (column)

l - y-coordinate (row)

w - with of the area in characters

h - height of the area in characters

curAttr - attribute to fill

See Also:

deleteChar(int, int), deleteLine(int), redraw

deleteArea

public void deleteArea(int c,
                       int l,
                       int w,
                       int h)

Delete a rectangular portion of the screen. You need to call redraw() to update the screen.

Parameters:

c - x-coordinate (column)

l - y-coordinate (row)

w - with of the area in characters

h - height of the area in characters

See Also:

deleteChar(int, int), deleteLine(int), redraw

setCursorPosition

public void setCursorPosition(int c,
                              int l)

Puts the cursor at the specified position.

Parameters:

c - column

l - line

showCursor

public void showCursor(boolean doshow)

getCursorPosition

public java.awt.Dimension getCursorPosition()

Get the current cursor position.

See Also:

Dimension

setTopMargin

public void setTopMargin(int l)

Set the top scroll margin for the screen. If the current bottom margin is smaller it will become the top margin and the line will become the bottom margin.

Parameters:

l - line that is the margin

getTopMargin

public int getTopMargin()

Get the top scroll margin.

setBottomMargin

public void setBottomMargin(int l)

Set the bottom scroll margin for the screen. If the current top margin is bigger it will become the bottom margin and the line will become the top margin.

Parameters:

l - line that is the margin

getBottomMargin

public int getBottomMargin()

Get the bottom scroll margin.

setBufferSize

public void setBufferSize(int amount)

Set scrollback buffer size.

Parameters:

amount - new size of the buffer

getBufferSize

public int getBufferSize()

Retrieve current scrollback buffer size.

See Also:

setBufferSize(int)

getMaxBufferSize

public int getMaxBufferSize()

Retrieve maximum buffer Size.

See Also:

getBufferSize()

setWindowBase

public void setWindowBase(int line)

Set the current window base. This allows to view the scrollback buffer.

Parameters:

line - the line where the screen window starts

See Also:

setBufferSize, getBufferSize

getWindowBase

public int getWindowBase()

Get the current window base.

See Also:

setWindowBase

setFont

public void setFont(java.awt.Font font)

Set the font to be used for rendering the characters on screen.

Overrides:

setFont in class java.awt.Component

Parameters:

font - the new font to be used.

setScreenSize

public void setScreenSize(int width,
                          int height)

Change the size of the screen. This will include adjustment of the scrollback buffer.

Parameters:

columns - width of the screen

columns - height of the screen

getScreenSize

public java.awt.Dimension getScreenSize()

Get the screen size in rows and columns.

setResizeStrategy

public void setResizeStrategy(int strategy)

Set the strategy when window is resized. RESIZE_FONT is default.

Parameters:

strategy - the strategy

See Also:

RESIZE_NONE, RESIZE_FONT, RESIZE_SCREEN

getRows

public int getRows()

Get amount of rows on the screen.

getColumns

public int getColumns()

Get amount of columns on the screen.

setBorder

public void setBorder(int thickness,
                      boolean raised)

Set the border thickness and the border type.

Parameters:

thickness - border thickness in pixels, zero means no border

raised - a boolean indicating a raised or embossed border

setScrollbar

public void setScrollbar(java.awt.Scrollbar scrollBar)

Connect a scrollbar to the VDU. This should be done differently using a property change listener.

Parameters:

scrollBar - the scroll bar

markLine

public void markLine(int l,
                     int n)

Mark lines to be updated with redraw().

Parameters:

l - starting line

n - amount of lines to be updated

See Also:

redraw()

redraw

public void redraw()

Redraw marked lines.

See Also:

markLine(int, int)

redraw

protected void redraw(java.awt.Graphics g)

paint

public void paint(java.awt.Graphics g)

Paint the current screen using the backing store image.

Overrides:

paint in class java.awt.Component

setColorPrinting

public void setColorPrinting(boolean colorPrint)

Set default for printing black&white or colorized as displayed on screen.

Parameters:

name - colorPrint true = print in full color, default b&w only

print

public void print(java.awt.Graphics g)

Overrides:

print in class java.awt.Component

mouseGetPos

public java.awt.Point mouseGetPos(java.awt.Point evtpt)

Convert Mouse Event coordinates into character cell coordinates

Parameters:

the - mouse point to be converted

Returns:

Character cell coordinate of passed point

setCursorColors

public void setCursorColors(java.awt.Color fg,
                            java.awt.Color bg)

Set cursor FG and BG colors

Parameters:

fg - foreground color or null

bg - background color or null

setBounds

public void setBounds(int x,
                      int y,
                      int w,
                      int h)

Reshape character display according to resize strategy.

Overrides:

setBounds in class java.awt.Component

See Also:

setResizeStrategy(int)

getSize

public java.awt.Dimension getSize()

Return the real size in points of the character display.

Overrides:

getSize in class java.awt.Component

Returns:

Dimension the dimension of the display

See Also:

Dimension

getPreferredSize

public java.awt.Dimension getPreferredSize()

Return the preferred Size of the character display. This turns out to be the actual size.

Overrides:

getPreferredSize in class java.awt.Component

Returns:

Dimension dimension of the display

See Also:

size

getInsets

public java.awt.Insets getInsets()

The insets of the character display define the border.

Returns:

Insets border thickness in pixels

clearSelection

public void clearSelection()

getSelection

public java.lang.String getSelection()

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent evt)

Specified by:

mouseMoved in interface java.awt.event.MouseMotionListener

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent evt)

Specified by:

mouseDragged in interface java.awt.event.MouseMotionListener

mouseClicked

public void mouseClicked(java.awt.event.MouseEvent evt)

Specified by:

mouseClicked in interface java.awt.event.MouseListener

mouseEntered

public void mouseEntered(java.awt.event.MouseEvent evt)

Specified by:

mouseEntered in interface java.awt.event.MouseListener

mouseExited

public void mouseExited(java.awt.event.MouseEvent evt)

Specified by:

mouseExited in interface java.awt.event.MouseListener

mousePressed

public void mousePressed(java.awt.event.MouseEvent evt)

Handle mouse pressed events for copy & paste.

Specified by:

mousePressed in interface java.awt.event.MouseListener

Parameters:

evt - the event that occured

See Also:

MouseEvent

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent evt)

Handle mouse released events for copy & paste.

Specified by:

mouseReleased in interface java.awt.event.MouseListener

Parameters:

evt - the mouse event

addMouseListener

public void addMouseListener(java.awt.event.MouseListener listener)

Add a mouse listener to the VDU. This is the implementation for the lightweight event handling.

Overrides:

addMouseListener in class java.awt.Component

Parameters:

listener - the new mouse listener

removeMouseListener

public void removeMouseListener(java.awt.event.MouseListener listener)

Remove a mouse listener to the VDU. This is the implementation for the lightweight event handling.

Overrides:

removeMouseListener in class java.awt.Component

Parameters:

listener - the mouse listener to remove

addMouseMotionListener

public void addMouseMotionListener(java.awt.event.MouseMotionListener listener)

Add a mouse motion listener to the VDU. This is the implementation for the lightweight event handling.

Overrides:

addMouseMotionListener in class java.awt.Component

Parameters:

listener - the mouse motion listener

removeMouseMotionListener

public void removeMouseMotionListener(java.awt.event.MouseMotionListener listener)

Remove a mouse motion listener to the VDU. This is the implementation for the lightweight event handling.

Overrides:

removeMouseMotionListener in class java.awt.Component

Parameters:

listener - the mouse motion listener to remove

processMouseEvent

public void processMouseEvent(java.awt.event.MouseEvent evt)

Process mouse events for this component. It will call the methods (mouseClicked() etc) in the added mouse listeners.

Overrides:

processMouseEvent in class java.awt.Component

Parameters:

evt - the dispatched mouse event

processMouseMotionEvent

public void processMouseMotionEvent(java.awt.event.MouseEvent evt)

Process mouse motion events for this component. It will call the methods (mouseDragged() etc) in the added mouse motion listeners.

Overrides:

processMouseMotionEvent in class java.awt.Component

Parameters:

evt - the dispatched mouse event

addKeyListener

public void addKeyListener(java.awt.event.KeyListener listener)

Add a key listener to the VDU. This is necessary to be able to receive keyboard input from this component. It is a prerequisite for a lightweigh component.

Overrides:

addKeyListener in class java.awt.Component

Parameters:

listener - the key listener

removeKeyListener

public void removeKeyListener(java.awt.event.KeyListener listener)

Remove key listener from the VDU. It is a prerequisite for a lightweigh component.

Overrides:

removeKeyListener in class java.awt.Component

Parameters:

listener - the key listener to remove

processKeyEvent

public void processKeyEvent(java.awt.event.KeyEvent evt)

Process key events for this component.

Overrides:

processKeyEvent in class java.awt.Component

Parameters:

evt - the dispatched key event

addFocusListener

public void addFocusListener(java.awt.event.FocusListener listener)

Overrides:

addFocusListener in class java.awt.Component

removeFocusListener

public void removeFocusListener(java.awt.event.FocusListener listener)

Overrides:

removeFocusListener in class java.awt.Component

processFocusEvent

public void processFocusEvent(java.awt.event.FocusEvent evt)

Overrides:

processFocusEvent in class java.awt.Component