jcurzez.peer
Class NullScreenPeer

java.lang.Object
  |
  +--jcurzez.peer.NullScreenPeer

All Implemented Interfaces:

ScreenPeer

public class NullScreenPeer

extends java.lang.Object

implements ScreenPeer

This class is needed because when the Jcurses's shutdown hook is called, there may be other threads that are still using Screen. So these calls are routed to here, where they are discarded.

Version:

0.0.3

Author:

Thomas Girard

See Also:

Screen.peer

Field Summary

private int	columns Columns of the previous peer.
private int	lines Lines of the previous peer.

Constructor Summary

NullScreenPeer(int columns, int lines)
Creates a new .

Method Summary

void	beep() Emits an audio beep.
void	end() Performs all shutdown tasks before the screen is destroyed.
int	getColumns() Retrieves the number of columns the screen has.
int	getFirstX() Retrieves the x coordinate by the time the screen object is created.
int	getFirstY() Retrieves the y coordinate by the time the screen object is created.
int	getLines() Retrieves the number of lines the screen has.
void	gotoXY(int x, int y) Does nothing.
void	printCell(int x, int y, Cell cell) Does nothing.
void	setCursorVisibility(int v) Changes the way cursor is displayed.
void	update() Does nothing.

Methods inherited from class java.lang.Object

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

Field Detail

columns

private final int columns

Columns of the previous peer. To be consistent.

lines

private final int lines

Lines of the previous peer. To be consistent.

Constructor Detail

NullScreenPeer

public NullScreenPeer(int columns,
                      int lines)

Creates a new .

Method Detail

gotoXY

public void gotoXY(int x,
                   int y)

Does nothing.

Specified by:

gotoXY in interface ScreenPeer

Following copied from interface: jcurzez.peer.ScreenPeer

Parameters:

x - x coordinate where to send the cursor. This is an absolute coordinate.

y - y coordinate where to send the cursor. This is an absolute coordinate.

See Also:

AbstractWindow.refresh()

printCell

public void printCell(int x,
                      int y,
                      Cell cell)

Does nothing.

Specified by:

printCell in interface ScreenPeer

Following copied from interface: jcurzez.peer.ScreenPeer

Parameters:

x - x coordinate where to send the cursor. This is an absolute coordinate.

y - y coordinate where to send the cursor. This is an absolute coordinate.

cell - the cell to print at this position.

See Also:

Cell

update

public void update()

Does nothing.

Specified by:

update in interface ScreenPeer

Following copied from interface: jcurzez.peer.ScreenPeer

See Also:

AbstractWindow.refresh()

getColumns

public int getColumns()

Description copied from interface: ScreenPeer

Retrieves the number of columns the screen has. This is often 80, but it may be different if you use a xterm, a different screen mode, or frame buffering.

Specified by:

getColumns in interface ScreenPeer

Following copied from interface: jcurzez.peer.ScreenPeer

Returns:

the number of columns the screen has.

getLines

public int getLines()

Description copied from interface: ScreenPeer

Retrieves the number of lines the screen has. This is often 25, but it may be different if you use a xterm, a different screen mode, or frame buffering.

Specified by:

getLines in interface ScreenPeer

Following copied from interface: jcurzez.peer.ScreenPeer

Returns:

the number of lines the screen has.

getFirstX

public int getFirstX()

Description copied from interface: ScreenPeer

Retrieves the x coordinate by the time the screen object is created.

Specified by:

getFirstX in interface ScreenPeer

Following copied from interface: jcurzez.peer.ScreenPeer

Returns:

the x coordinate at the beginning.

getFirstY

public int getFirstY()

Description copied from interface: ScreenPeer

Retrieves the y coordinate by the time the screen object is created.

Specified by:

getFirstY in interface ScreenPeer

Following copied from interface: jcurzez.peer.ScreenPeer

Returns:

the y coordinate at the beginning.

setCursorVisibility

public void setCursorVisibility(int v)

Description copied from interface: ScreenPeer

Changes the way cursor is displayed.

Specified by:

setCursorVisibility in interface ScreenPeer

Following copied from interface: jcurzez.peer.ScreenPeer

Parameters:

v - visibility of the cursor. One of NORMAL, INVISIBLE, VERY_VISIBLE.

See Also:

Cursor

beep

public void beep()

Description copied from interface: ScreenPeer

Emits an audio beep.

Specified by:

beep in interface ScreenPeer

end

public void end()

Description copied from interface: ScreenPeer

Performs all shutdown tasks before the screen is destroyed.

Specified by:

end in interface ScreenPeer