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577 lines
22 KiB
577 lines
22 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Tic Tac Toe</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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a:link { color: #004faf; text-decoration: none }
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a:visited { color: #672967; text-decoration: none }
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body { background: #ffffff; color: black; }
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--></style>
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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| <a href="classes.html">
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<font color="#004faf">Annotated</font></a>
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<font color="#004faf">Grouped Classes</font></a>
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| <a href="functions.html">
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<font color="#004faf">Functions</font></a>
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</td>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Tic Tac Toe</h1>
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<p>
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This is an implementation of the Tic-tac-toe game.
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<p> We didn't put much effort in making a clever algorithm so it's not a
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challenge to play against the computer. Instead, study the source code
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to see how you can make reusable components such as the <em>TicTacGameBoard</em>
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widget.
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<p> <hr>
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<p> Header file:
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<p> <pre>/****************************************************************************
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** $Id: qt/tictac.h 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#ifndef TICTAC_H
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#define TICTAC_H
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#include <<a href="tqpushbutton-h.html">tqpushbutton.h</a>>
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#include <<a href="tqptrvector-h.html">tqptrvector.h</a>>
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class TQComboBox;
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class TQLabel;
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// --------------------------------------------------------------------------
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// TicTacButton implements a single tic-tac-toe button
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//
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class TicTacButton : public <a href="tqpushbutton.html">TQPushButton</a>
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{
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<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
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public:
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TicTacButton( <a href="tqwidget.html">TQWidget</a> *parent );
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enum Type { Blank, Circle, Cross };
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Type type() const { return t; }
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void setType( Type type ) { t = type; repaint(); }
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<a href="tqsizepolicy.html">TQSizePolicy</a> sizePolicy() const
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{ return TQSizePolicy( TQSizePolicy::Preferred, TQSizePolicy::Preferred ); }
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<a href="tqsize.html">TQSize</a> sizeHint() const { return TQSize( 32, 32 ); }
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<a href="tqsize.html">TQSize</a> minimumSizeHint() const { return TQSize( 10, 10 ); }
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protected:
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void drawButtonLabel( <a href="tqpainter.html">TQPainter</a> * );
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private:
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Type t;
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};
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// Using template vector to make vector-class of TicTacButton.
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// This vector is used by the TicTacGameBoard class defined below.
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typedef TQPtrVector<TicTacButton> TicTacButtons;
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typedef TQMemArray<int> TicTacArray;
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// --------------------------------------------------------------------------
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// TicTacGameBoard implements the tic-tac-toe game board.
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// TicTacGameBoard is a composite widget that contains N x N TicTacButtons.
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// N is specified in the constructor.
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//
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class TicTacGameBoard : public <a href="tqwidget.html">TQWidget</a>
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{
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TQ_OBJECT
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public:
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TicTacGameBoard( int n, TQWidget *parent=0, const char *name=0 );
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~TicTacGameBoard();
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enum State { Init, HumansTurn, HumanWon, ComputerWon, NobodyWon };
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State state() const { return st; }
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void computerStarts( bool v );
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void newGame();
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signals:
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void finished(); // game finished
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private slots:
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void buttonClicked();
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private:
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void setState( State state ) { st = state; }
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void updateButtons();
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int checkBoard( TicTacArray * );
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void computerMove();
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State st;
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int nBoard;
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bool comp_starts;
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TicTacArray *btArray;
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TicTacButtons *buttons;
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};
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// --------------------------------------------------------------------------
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// TicTacToe implements the complete game.
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// TicTacToe is a composite widget that contains a TicTacGameBoard and
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// two push buttons for starting the game and quitting.
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//
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class TicTacToe : public <a href="tqwidget.html">TQWidget</a>
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{
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TQ_OBJECT
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public:
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TicTacToe( int boardSize=3, TQWidget *parent=0, const char *name=0 );
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private slots:
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void newGameClicked();
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void gameOver();
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private:
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void newState();
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<a href="tqcombobox.html">TQComboBox</a> *whoStarts;
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<a href="tqpushbutton.html">TQPushButton</a> *newGame;
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<a href="tqpushbutton.html">TQPushButton</a> *quit;
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<a href="tqlabel.html">TQLabel</a> *message;
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TicTacGameBoard *board;
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};
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#endif // TICTAC_H
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</pre>
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<p> <hr>
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<p> Implementation:
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<p> <pre>/****************************************************************************
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** $Id: qt/tictac.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "tictac.h"
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#include <<a href="tqapplication-h.html">tqapplication.h</a>>
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#include <<a href="tqpainter-h.html">tqpainter.h</a>>
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#include <<a href="tqdrawutil-h.html">tqdrawutil.h</a>>
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#include <<a href="tqcombobox-h.html">tqcombobox.h</a>>
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#include <<a href="tqcheckbox-h.html">tqcheckbox.h</a>>
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#include <<a href="tqlabel-h.html">tqlabel.h</a>>
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#include <<a href="tqlayout-h.html">tqlayout.h</a>>
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#include <stdlib.h> // rand() function
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#include <<a href="tqdatetime-h.html">tqdatetime.h</a>> // seed for rand()
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//***************************************************************************
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//* TicTacButton member functions
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//***************************************************************************
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// --------------------------------------------------------------------------
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// Creates a TicTacButton
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//
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<a name="f188"></a>TicTacButton::TicTacButton( <a href="tqwidget.html">TQWidget</a> *parent ) : <a href="tqpushbutton.html">TQPushButton</a>( parent )
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{
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t = Blank; // initial type
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}
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// --------------------------------------------------------------------------
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// Paints TicTacButton
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//
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<a name="x31"></a>void TicTacButton::<a href="tqbutton.html#drawButtonLabel">drawButtonLabel</a>( <a href="tqpainter.html">TQPainter</a> *p )
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{
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<a href="tqrect.html">TQRect</a> r = <a href="tqwidget.html#rect">rect</a>();
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p-><a href="tqpainter.html#setPen">setPen</a>( TQPen( white,2 ) ); // set fat pen
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if ( t == Circle ) {
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<a name="x36"></a><a name="x35"></a><a name="x28"></a> p-><a href="tqpainter.html#drawEllipse">drawEllipse</a>( r.<a href="tqrect.html#left">left</a>()+4, r.<a href="tqrect.html#top">top</a>()+4, r.<a href="tqrect.html#width">width</a>()-8, r.<a href="tqrect.html#height">height</a>()-8 );
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} else if ( t == Cross ) { // draw cross
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<a name="x37"></a><a name="x33"></a> p-><a href="tqpainter.html#drawLine">drawLine</a>( r.<a href="tqrect.html#topLeft">topLeft</a>() +TQPoint(4,4), r.<a href="tqrect.html#bottomRight">bottomRight</a>()-TQPoint(4,4));
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<a name="x38"></a><a name="x32"></a> p-><a href="tqpainter.html#drawLine">drawLine</a>( r.<a href="tqrect.html#bottomLeft">bottomLeft</a>()+TQPoint(4,-4),r.<a href="tqrect.html#topRight">topRight</a>() -TQPoint(4,-4));
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}
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}
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//***************************************************************************
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//* TicTacGameBoard member functions
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//***************************************************************************
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// --------------------------------------------------------------------------
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// Creates a game board with N x N buttons and connects the "clicked()"
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// signal of all buttons to the "buttonClicked()" slot.
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//
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<a name="f189"></a>TicTacGameBoard::TicTacGameBoard( int n, TQWidget *parent, const char *name )
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: <a href="tqwidget.html">TQWidget</a>( parent, name )
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{
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st = Init; // initial state
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nBoard = n;
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n *= n; // make square
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comp_starts = FALSE; // human starts
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buttons = new TicTacButtons(n); // create real buttons
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btArray = new TicTacArray(n); // create button model
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<a href="tqgridlayout.html">TQGridLayout</a> * grid = new <a href="tqgridlayout.html">TQGridLayout</a>( this, nBoard, nBoard, 4 );
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<a href="tqpalette.html">TQPalette</a> p( blue );
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for ( int i=0; i<n; i++ ) { // create and connect buttons
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TicTacButton *ttb = new TicTacButton( this );
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<a name="x45"></a> ttb-><a href="tqwidget.html#setPalette">setPalette</a>( p );
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ttb-><a href="tqwidget.html#setEnabled">setEnabled</a>( FALSE );
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<a href="tqobject.html#connect">connect</a>( ttb, TQ_SIGNAL(<a href="tqbutton.html#clicked">clicked</a>()), TQ_SLOT(buttonClicked()) );
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grid-><a href="tqgridlayout.html#addWidget">addWidget</a>( ttb, i%nBoard, i/nBoard );
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buttons->insert( i, ttb );
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btArray->at(i) = TicTacButton::Blank; // initial button type
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}
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<a name="x40"></a> <a href="tqtime.html">TQTime</a> t = TQTime::<a href="tqtime.html#currentTime">currentTime</a>(); // set random seed
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<a name="x43"></a><a name="x42"></a><a name="x41"></a> srand( t.<a href="tqtime.html#hour">hour</a>()*12+t.<a href="tqtime.html#minute">minute</a>()*60+t.<a href="tqtime.html#second">second</a>()*60 );
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}
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TicTacGameBoard::~TicTacGameBoard()
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{
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delete buttons;
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delete btArray;
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}
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// --------------------------------------------------------------------------
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// TicTacGameBoard::computerStarts( bool v )
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//
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// Computer starts if v=TRUE. The human starts by default.
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//
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void <a name="f190"></a>TicTacGameBoard::computerStarts( bool v )
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{
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comp_starts = v;
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}
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// --------------------------------------------------------------------------
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// TicTacGameBoard::newGame()
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//
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// Clears the game board and prepares for a new game
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//
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void <a name="f191"></a>TicTacGameBoard::newGame()
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{
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st = HumansTurn;
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for ( int i=0; i<nBoard*nBoard; i++ )
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btArray->at(i) = TicTacButton::Blank;
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if ( comp_starts )
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computerMove();
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else
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updateButtons();
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}
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// --------------------------------------------------------------------------
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// TicTacGameBoard::buttonClicked() - TQ_SLOT
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//
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// This slot is activated when a TicTacButton emits the signal "clicked()",
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// i.e. the user has clicked on a TicTacButton.
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//
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void <a name="f192"></a>TicTacGameBoard::buttonClicked()
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{
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if ( st != HumansTurn ) // not ready
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return;
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int i = buttons->findRef( (TicTacButton*)<a href="tqobject.html#sender">sender</a>() );
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TicTacButton *b = buttons->at(i); // get piece that was pressed
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if ( b->type() == TicTacButton::Blank ) { // empty piece?
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btArray->at(i) = TicTacButton::Circle;
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updateButtons();
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if ( checkBoard( btArray ) == 0 ) // not a winning move?
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computerMove();
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int s = checkBoard( btArray );
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if ( s ) { // any winners yet?
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st = s == TicTacButton::Circle ? HumanWon : ComputerWon;
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emit finished();
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}
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}
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}
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// --------------------------------------------------------------------------
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// TicTacGameBoard::updateButtons()
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//
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// Updates all buttons that have changed state
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//
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void <a name="f193"></a>TicTacGameBoard::updateButtons()
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{
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for ( int i=0; i<nBoard*nBoard; i++ ) {
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if ( buttons->at(i)->type() != btArray->at(i) )
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buttons->at(i)->setType( (TicTacButton::Type)btArray->at(i) );
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buttons->at(i)->setEnabled( buttons->at(i)->type() ==
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TicTacButton::Blank );
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}
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}
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// --------------------------------------------------------------------------
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// TicTacGameBoard::checkBoard()
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//
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// Checks if one of the players won the game, works for any board size.
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//
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// Returns:
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// - TicTacButton::Cross if the player with X buttons won
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// - TicTacButton::Circle if the player with O buttons won
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// - Zero (0) if there is no winner yet
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//
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int <a name="f194"></a>TicTacGameBoard::checkBoard( TicTacArray *a )
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{
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int t = 0;
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int row, col;
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bool won = FALSE;
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for ( row=0; row<nBoard && !won; row++ ) { // check horizontal
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t = a->at(row*nBoard);
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if ( t == TicTacButton::Blank )
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continue;
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col = 1;
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while ( col<nBoard && a->at(row*nBoard+col) == t )
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col++;
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if ( col == nBoard )
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won = TRUE;
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}
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for ( col=0; col<nBoard && !won; col++ ) { // check vertical
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t = a->at(col);
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if ( t == TicTacButton::Blank )
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continue;
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row = 1;
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while ( row<nBoard && a->at(row*nBoard+col) == t )
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row++;
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if ( row == nBoard )
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won = TRUE;
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}
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if ( !won ) { // check diagonal top left
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t = a->at(0); // to bottom right
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if ( t != TicTacButton::Blank ) {
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int i = 1;
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while ( i<nBoard && a->at(i*nBoard+i) == t )
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i++;
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if ( i == nBoard )
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won = TRUE;
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}
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}
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if ( !won ) { // check diagonal bottom left
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int j = nBoard-1; // to top right
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int i = 0;
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t = a->at(i+j*nBoard);
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if ( t != TicTacButton::Blank ) {
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i++; j--;
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while ( i<nBoard && a->at(i+j*nBoard) == t ) {
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i++; j--;
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}
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if ( i == nBoard )
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won = TRUE;
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}
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}
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if ( !won ) // no winner
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t = 0;
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return t;
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}
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// --------------------------------------------------------------------------
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// TicTacGameBoard::computerMove()
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//
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// Puts a piece on the game board. Very, very simple.
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//
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void <a name="f195"></a>TicTacGameBoard::computerMove()
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{
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int numButtons = nBoard*nBoard;
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int *altv = new int[numButtons]; // buttons alternatives
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int altc = 0;
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int stopHuman = -1;
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TicTacArray a = btArray->copy();
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int i;
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for ( i=0; i<numButtons; i++ ) { // try all positions
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if ( a[i] != TicTacButton::Blank ) // already a piece there
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continue;
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a[i] = TicTacButton::Cross; // test if computer wins
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if ( checkBoard(&a) == a[i] ) { // computer will win
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st = ComputerWon;
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stopHuman = -1;
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break;
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}
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a[i] = TicTacButton::Circle; // test if human wins
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if ( checkBoard(&a) == a[i] ) { // oops...
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stopHuman = i; // remember position
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a[i] = TicTacButton::Blank; // restore button
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continue; // computer still might win
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}
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a[i] = TicTacButton::Blank; // restore button
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altv[altc++] = i; // remember alternative
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}
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if ( stopHuman >= 0 ) // must stop human from winning
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a[stopHuman] = TicTacButton::Cross;
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else if ( i == numButtons ) { // tried all alternatives
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if ( altc > 0 ) // set random piece
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a[altv[rand()%(altc--)]] = TicTacButton::Cross;
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if ( altc == 0 ) { // no more blanks
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st = NobodyWon;
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emit finished();
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}
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}
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*btArray = a; // update model
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updateButtons(); // update buttons
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delete[] altv;
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}
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//***************************************************************************
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//* TicTacToe member functions
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//***************************************************************************
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// --------------------------------------------------------------------------
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// Creates a game widget with a game board and two push buttons, and connects
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// signals of child widgets to slots.
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//
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<a name="f196"></a>TicTacToe::TicTacToe( int boardSize, TQWidget *parent, const char *name )
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: <a href="tqwidget.html">TQWidget</a>( parent, name )
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{
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<a href="tqvboxlayout.html">TQVBoxLayout</a> * l = new <a href="tqvboxlayout.html">TQVBoxLayout</a>( this, 6 );
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// Create a message label
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message = new <a href="tqlabel.html">TQLabel</a>( this );
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<a name="x24"></a> message-><a href="tqframe.html#setFrameStyle">setFrameStyle</a>( TQFrame::WinPanel | TQFrame::Sunken );
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message-><a href="tqlabel.html#setAlignment">setAlignment</a>( AlignCenter );
|
|
l-><a href="tqboxlayout.html#addWidget">addWidget</a>( message );
|
|
|
|
// Create the game board and connect the signal finished() to this
|
|
// gameOver() slot
|
|
|
|
board = new TicTacGameBoard( boardSize, this );
|
|
<a href="tqobject.html#connect">connect</a>( board, TQ_SIGNAL(finished()), TQ_SLOT(gameOver()) );
|
|
l-><a href="tqboxlayout.html#addWidget">addWidget</a>( board );
|
|
|
|
// Create a horizontal frame line
|
|
|
|
<a href="tqframe.html">TQFrame</a> *line = new <a href="tqframe.html">TQFrame</a>( this );
|
|
line-><a href="tqframe.html#setFrameStyle">setFrameStyle</a>( TQFrame::HLine | TQFrame::Sunken );
|
|
l-><a href="tqboxlayout.html#addWidget">addWidget</a>( line );
|
|
|
|
// Create the combo box for deciding who should start, and
|
|
// connect its clicked() signals to the buttonClicked() slot
|
|
|
|
whoStarts = new <a href="tqcombobox.html">TQComboBox</a>( this );
|
|
<a name="x23"></a> whoStarts-><a href="tqcombobox.html#insertItem">insertItem</a>( "Computer starts" );
|
|
whoStarts-><a href="tqcombobox.html#insertItem">insertItem</a>( "Human starts" );
|
|
l-><a href="tqboxlayout.html#addWidget">addWidget</a>( whoStarts );
|
|
|
|
// Create the push buttons and connect their clicked() signals
|
|
// to this right slots.
|
|
|
|
newGame = new <a href="tqpushbutton.html">TQPushButton</a>( "Play!", this );
|
|
<a href="tqobject.html#connect">connect</a>( newGame, TQ_SIGNAL(<a href="tqbutton.html#clicked">clicked</a>()), TQ_SLOT(newGameClicked()) );
|
|
quit = new <a href="tqpushbutton.html">TQPushButton</a>( "Quit", this );
|
|
<a href="tqobject.html#connect">connect</a>( quit, TQ_SIGNAL(<a href="tqbutton.html#clicked">clicked</a>()), tqApp, TQ_SLOT(<a href="tqapplication.html#quit">quit</a>()) );
|
|
<a href="tqhboxlayout.html">TQHBoxLayout</a> * b = new <a href="tqhboxlayout.html">TQHBoxLayout</a>;
|
|
<a name="x19"></a> l-><a href="tqboxlayout.html#addLayout">addLayout</a>( b );
|
|
b-><a href="tqboxlayout.html#addWidget">addWidget</a>( newGame );
|
|
b-><a href="tqboxlayout.html#addWidget">addWidget</a>( quit );
|
|
|
|
newState();
|
|
}
|
|
|
|
|
|
// --------------------------------------------------------------------------
|
|
// TicTacToe::newGameClicked() - TQ_SLOT
|
|
//
|
|
// This slot is activated when the new game button is clicked.
|
|
//
|
|
|
|
void <a name="f197"></a>TicTacToe::newGameClicked()
|
|
{
|
|
<a name="x22"></a> board->computerStarts( whoStarts-><a href="tqcombobox.html#currentItem">currentItem</a>() == 0 );
|
|
board->newGame();
|
|
newState();
|
|
}
|
|
|
|
|
|
// --------------------------------------------------------------------------
|
|
// TicTacToe::gameOver() - TQ_SLOT
|
|
//
|
|
// This slot is activated when the TicTacGameBoard emits the signal
|
|
// "finished()", i.e. when a player has won or when it is a draw.
|
|
//
|
|
|
|
void <a name="f198"></a>TicTacToe::gameOver()
|
|
{
|
|
newState(); // update text box
|
|
}
|
|
|
|
|
|
// --------------------------------------------------------------------------
|
|
// Updates the message to reflect a new state.
|
|
//
|
|
|
|
void <a name="f199"></a>TicTacToe::newState()
|
|
{
|
|
static const char *msg[] = { // TicTacGameBoard::State texts
|
|
"Click Play to start", "Make your move",
|
|
"You won!", "Computer won!", "It's a draw" };
|
|
message-><a href="tqlabel.html#setText">setText</a>( msg[board->state()] );
|
|
return;
|
|
}
|
|
</pre>
|
|
|
|
<p> <hr>
|
|
<p> Main:
|
|
<p> <pre>/****************************************************************************
|
|
** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $
|
|
**
|
|
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
|
|
**
|
|
** This file is part of an example program for TQt. This example
|
|
** program may be used, distributed and modified without limitation.
|
|
**
|
|
*****************************************************************************/
|
|
|
|
#include <<a href="tqapplication-h.html">tqapplication.h</a>>
|
|
#include <stdlib.h>
|
|
#include "tictac.h"
|
|
|
|
|
|
int main( int argc, char **argv )
|
|
{
|
|
<a href="tqapplication.html">TQApplication</a> a( argc, argv );
|
|
int n = 3;
|
|
if ( argc == 2 ) // get board size n
|
|
n = atoi(argv[1]);
|
|
if ( n < 3 || n > 10 ) { // out of range
|
|
<a href="tqapplication.html#qWarning">tqWarning</a>( "%s: Board size must be from 3x3 to 10x10", argv[0] );
|
|
return 1;
|
|
}
|
|
TicTacToe ttt( n ); // create game
|
|
a.<a href="tqapplication.html#setMainWidget">setMainWidget</a>( &ttt );
|
|
ttt.<a href="tqwidget.html#setCaption">setCaption</a>("TQt Example - TicTac");
|
|
ttt.<a href="tqwidget.html#show">show</a>(); // show widget
|
|
return a.<a href="tqapplication.html#exec">exec</a>(); // go
|
|
}
|
|
</pre>
|
|
|
|
<p>See also <a href="examples.html">Examples</a>.
|
|
|
|
<!-- eof -->
|
|
<p><address><hr><div align=center>
|
|
<table width=100% cellspacing=0 border=0><tr>
|
|
<td>Copyright © 2007
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
|
<td align=right><div align=right>TQt 3.3.8</div>
|
|
</table></div></address></body>
|
|
</html>
|