pqrtreeapplet
Class PQRController

java.lang.Object
  pqrtreeapplet.PQRController

All Implemented Interfaces:

java.awt.event.ActionListener, java.util.EventListener

public class PQRController
extends java.lang.Object
implements java.awt.event.ActionListener

The controller component of the model/view/controller for this application This class starts the execution and either loads the GUI. Based in the PQController class of Jon Harris' Graphical Implementation of PQ Tree Data Structure. PQ Tree link.

Version:

0.1

Author:

Bruno Dilly

Field Summary

java.util.concurrent.locks.Lock	addSetLock
private java.util.concurrent.ExecutorService	application
java.util.concurrent.locks.Condition	canAddSet
java.util.concurrent.locks.Condition	canBePainted
private int	delayInSeconds
private boolean	drawAllSteps
java.util.concurrent.locks.Condition	nextStep
private PQRTree	pqrTree
boolean	setToBePainted
private javax.swing.Timer	timer
private PQRWindow	window

Constructor Summary

PQRController(int universeSize)

Method Summary

void	actionPerformed(java.awt.event.ActionEvent e) button click handlers for the gui.
void	destroy() Kills the thread.
private int[]	getConstraintsFromGUI() Reduces the tree using the constraints provided by the GUI.
Node	getLeafAt(int index) Gets the leaf at a specific position of the leaves vector.
PQRWindow	getWindow() Gets the window created by the controller.
void	init() Creates a new window.
void	reduceTree(int[] constraints) Reduce the tree using the constraints provided in a vector.
void	reduceTreeByStep() Reduces the tree by one step.
void	resetTree() Resets the tree back to the universal tree.

Methods inherited from class java.lang.Object

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

Field Detail

pqrTree

private PQRTree pqrTree

window

private PQRWindow window

timer

private javax.swing.Timer timer

addSetLock

public java.util.concurrent.locks.Lock addSetLock

canAddSet

public java.util.concurrent.locks.Condition canAddSet

canBePainted

public java.util.concurrent.locks.Condition canBePainted

nextStep

public java.util.concurrent.locks.Condition nextStep

setToBePainted

public boolean setToBePainted

application

private java.util.concurrent.ExecutorService application

drawAllSteps

private boolean drawAllSteps

delayInSeconds

private int delayInSeconds

Constructor Detail

PQRController

public PQRController(int universeSize)
              throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

init

public void init()
          throws java.lang.Exception

Creates a new window. Adds listeners to the buttons.

Throws:

java.lang.Exception

getWindow

public PQRWindow getWindow()

Gets the window created by the controller.

Returns:

The window created.

getConstraintsFromGUI

private int[] getConstraintsFromGUI()

Reduces the tree using the constraints provided by the GUI.

Returns:

An array of constraints.

reduceTree

public void reduceTree(int[] constraints)
                throws java.lang.Exception

Reduce the tree using the constraints provided in a vector.

Parameters:

constraints - The set to be added to the tree.

Throws:

java.lang.Exception

reduceTreeByStep

public void reduceTreeByStep()
                      throws java.lang.Exception

Reduces the tree by one step.

Throws:

java.lang.Exception

resetTree

public void resetTree()
               throws java.lang.Exception

Resets the tree back to the universal tree. Concludes atual reduction, if necessary, for thread consistency.

Throws:

java.lang.Exception

getLeafAt

public Node getLeafAt(int index)

Gets the leaf at a specific position of the leaves vector.

Parameters:

index - Position of the vector.

Returns:

Leaf at the position index.

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent e)

button click handlers for the gui.

Specified by:

actionPerformed in interface java.awt.event.ActionListener

Parameters:

e - The action event occurred.

destroy

public void destroy()

Kills the thread.