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Class kpalin.alabra.ChessTimer

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----kpalin.alabra.ChessTimer

public class ChessTimer

extends Panel

implements Runnable, Externalizable

Author:

Kimmo Palin

nf

This avoids fetching NumberFormat information every second.

side

Side of the player.

th

Thread controling the clock.

timeBase

Starting time of the timers.

timeDelta

The counters are added this value every second.

timeElapsed

Signaling interface towards Observer.

timeLabel

The time shown on the panel.

timeSec

Integer representation of the time.

ChessTimer()

This is useless constructor for programmer but Externalizable-interface uses this (public no-arg constructor).

ChessTimer(String, int, int, Observer)

Creates a new chess timer for specific player.

adjustTimeDelta()

Sets the timeDelta-attribute to correct direction.

getTime()

Returns elapsed time in seconds.

isCurrentThread()

Checks if we are testing from current thread.

newTimeSlize()

Gives a new timeslize for this timer.

readExternal(ObjectInput)

Used for reading saved ChessTimer.

reset()

Resets the timer to stop at timeBase

resume()

Resumes the time counting.

run()

This controls the timers.

setTimeBase(int)

Sets new time base.

stop()

Stops the counter permanently.

suspend()

Suspends the counter for now.

toString()

Time formater for Label.

writeExternal(ObjectOutput)

Used for saving this object.

 private Label side

Side of the player. White or Black.

 private Label timeLabel

The time shown on the panel.

 private int timeSec

Integer representation of the time.

 private int timeBase

Starting time of the timers. If this is >0, the timers run downwards, else upwards.

 private int timeDelta

The counters are added this value every second.

 private Thread th

Thread controling the clock.

 private ClockListen timeElapsed

Signaling interface towards Observer.

 private final NumberFormat nf

This avoids fetching NumberFormat information every second.

 public ChessTimer()

This is useless constructor for programmer but Externalizable-interface uses this (public no-arg constructor).

 ChessTimer(String who,
            int sideCode,
            int timeLimit,
            Observer obs)

Creates a new chess timer for specific player.

Parameters:

who - Name whose timer this is.

sideCode - Number id of the player, for callback.

timeLimit - Size of the timeshare.

obs - Observer for the callback.

 private void setTimeBase(int base)

Sets new time base.

Parameters:

base - New time base.

 public void newTimeSlize()

Gives a new timeslize for this timer.

 private void adjustTimeDelta()

Sets the timeDelta-attribute to correct direction.

 public void reset()

Resets the timer to stop at timeBase

 public void run()

This controls the timers.

 public synchronized String toString()

Time formater for Label. Synchronized because of nf-instance.

Overrides:

toString in class Component

 public synchronized void resume()

Resumes the time counting.

 public synchronized void suspend()

Suspends the counter for now.

 public boolean isCurrentThread()

Checks if we are testing from current thread. (Needed for the alarm.)

 public synchronized void stop()

Stops the counter permanently.

 public int getTime()

Returns elapsed time in seconds.

 public void writeExternal(ObjectOutput out) throws IOException

Used for saving this object. This is a must, because it's impossible to save Thread-object.

 public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException

Used for reading saved ChessTimer. Doesn't read Thread because it's not saved.

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