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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Qt Toolkit - tictac/main.cpp example file</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: white; color: black; }--></style></head><body bgcolor="#ffffff"><table width="100%"><tr><td><a href="index.html"><img width="100" height="100" src="qtlogo.png"alt="Home" border="0"><img width="100"height="100" src="face.png" alt="Home" border="0"></a><td valign="top"><div align="right"><img src="dochead.png" width="472" height="27"><br><a href="classes.html"><b>Classes</b></a>- <a href="annotated.html">Annotated</a>- <a href="hierarchy.html">Tree</a>- <a href="functions.html">Functions</a>- <a href="index.html">Home</a>- <a href="topicals.html"><b>Structure</b> <font face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular" align="center" size=32>Qte</font></a></div></table><h1 align=center>Tic Tac Toe</h1><br clear="all"> This is an implementation of the Tic-tac-toe game. We didn't put much effort in making a clever algorithm so it's not a challenge to play against the computer. Instead, study the source code to see how you can make reusable components such as the TicTacGameBoard widget. <hr> Header file: <pre>/****************************************************************************** $Id: qt/examples/tictac/tictac.h 2.3.8 edited 2004-05-12 $**** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.**** This file is part of an example program for Qt. This example** program may be used, distributed and modified without limitation.*******************************************************************************/#ifndef TICTAC_H#define TICTAC_H#include <<a href="qpushbutton-h.html">qpushbutton.h</a>>#include <<a href="qvector-h.html">qvector.h</a>>class QComboBox;class QLabel;// --------------------------------------------------------------------------// TicTacButton implements a single tic-tac-toe button//class TicTacButton : public QPushButton{ Q_OBJECTpublic: TicTacButton( <a href="qwidget.html">QWidget</a> *parent ); enum Type { Blank, Circle, Cross }; Type type() const { return t; } void setType( Type type ) { t = type; repaint(); } <a href="qsizepolicy.html">QSizePolicy</a> sizePolicy() const { return QSizePolicy( QSizePolicy::Preferred, QSizePolicy::Preferred ); } <a href="qsize.html">QSize</a> sizeHint() const { return QSize( 32, 32 ); } <a href="qsize.html">QSize</a> minimumSizeHint() const { return QSize( 10, 10 ); }protected: void drawButtonLabel( <a href="qpainter.html">QPainter</a> * );private: Type t;};// Using template vector to make vector-class of TicTacButton.// This vector is used by the TicTacGameBoard class defined below.typedef QVector<TicTacButton> TicTacButtons;typedef QArray<int> TicTacArray;// --------------------------------------------------------------------------// TicTacGameBoard implements the tic-tac-toe game board.// TicTacGameBoard is a composite widget that contains N x N TicTacButtons.// N is specified in the constructor.//class TicTacGameBoard : public QWidget{ Q_OBJECTpublic: TicTacGameBoard( int n, QWidget *parent=0, const char *name=0 ); ~TicTacGameBoard(); enum State { Init, HumansTurn, HumanWon, ComputerWon, NobodyWon }; State state() const { return st; } void computerStarts( bool v ); void newGame();signals: void finished(); // game finishedprivate slots: void buttonClicked();private: void setState( State state ) { st = state; } void updateButtons(); int checkBoard( TicTacArray * ); void computerMove(); State st; int nBoard; bool comp_starts; TicTacArray *btArray; TicTacButtons *buttons;};// --------------------------------------------------------------------------// TicTacToe implements the complete game.// TicTacToe is a composite widget that contains a TicTacGameBoard and// two push buttons for starting the game and quitting.//class TicTacToe : public QWidget{ Q_OBJECTpublic: TicTacToe( int boardSize=3, QWidget *parent=0, const char *name=0 );private slots: void newGameClicked(); void gameOver();private: void newState(); <a href="qcombobox.html">QComboBox</a> *whoStarts; <a href="qpushbutton.html">QPushButton</a> *newGame; <a href="qpushbutton.html">QPushButton</a> *quit; <a href="qlabel.html">QLabel</a> *message; TicTacGameBoard *board;};#endif // TICTAC_H</pre> <hr> Implementation: <pre>/****************************************************************************** $Id: qt/examples/tictac/tictac.cpp 2.3.8 edited 2004-05-12 $**** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.**** This file is part of an example program for Qt. This example** program may be used, distributed and modified without limitation.*******************************************************************************/#include "tictac.h"#include <<a href="qapplication-h.html">qapplication.h</a>>#include <<a href="qpainter-h.html">qpainter.h</a>>#include <<a href="qdrawutil-h.html">qdrawutil.h</a>>#include <<a href="qcombobox-h.html">qcombobox.h</a>>#include <<a href="qcheckbox-h.html">qcheckbox.h</a>>#include <<a href="qlabel-h.html">qlabel.h</a>>#include <<a href="qlayout-h.html">qlayout.h</a>>#include <stdlib.h> // rand() function#include <<a href="qdatetime-h.html">qdatetime.h</a>> // seed for rand()//***************************************************************************//* TicTacButton member functions//***************************************************************************// --------------------------------------------------------------------------// Creates a TicTacButton//TicTacButton::TicTacButton( <a href="qwidget.html">QWidget</a> *parent ) : <a href="qpushbutton.html">QPushButton</a>( parent ){ t = Blank; // initial type}// --------------------------------------------------------------------------// Paints TicTacButton//void <a name="337"></a>TicTacButton::drawButtonLabel( <a href="qpainter.html">QPainter</a> *p ){ <a href="qrect.html">QRect</a> r = rect(); p->setPen( <a href="qpen.html">QPen</a>( white,2 ) ); // set fat pen if ( t == Circle ) { p->drawEllipse( r.<a href="qrect.html#369cab">left</a>()+4, r.<a href="qrect.html#4dd27e">top</a>()+4, r.<a href="qrect.html#45fe95">width</a>()-8, r.<a href="qrect.html#581ab8">height</a>()-8 ); } else if ( t == Cross ) { // draw cross p->drawLine( r.<a href="qrect.html#349186">topLeft</a>() +QPoint(4,4), r.<a href="qrect.html#9f41f2">bottomRight</a>()-QPoint(4,4)); p->drawLine( r.<a href="qrect.html#5dd6a8">bottomLeft</a>()+QPoint(4,-4),r.<a href="qrect.html#d59dee">topRight</a>() -QPoint(4,-4)); }}//***************************************************************************//* TicTacGameBoard member functions//***************************************************************************// --------------------------------------------------------------------------// Creates a game board with N x N buttons and connects the "clicked()"// signal of all buttons to the "buttonClicked()" slot.//TicTacGameBoard::TicTacGameBoard( int n, QWidget *parent, const char *name ) : <a href="qwidget.html">QWidget</a>( parent, name ){ st = Init; // initial state nBoard = n; n *= n; // make square comp_starts = FALSE; // human starts buttons = new TicTacButtons(n); // create real buttons btArray = new TicTacArray(n); // create button model <a href="qgridlayout.html">QGridLayout</a> * grid = new <a href="qgridlayout.html">QGridLayout</a>( this, 3, 3, 4 ); <a href="qpalette.html">QPalette</a> p( blue ); for ( int i=0; i<n; i++ ) { // create and connect buttons TicTacButton *ttb = new TicTacButton( this ); ttb-><a href="qwidget.html#d7e4b9">setPalette</a>( p ); ttb-><a href="qwidget.html#4b103c">setEnabled</a>( FALSE ); <a href="qobject.html#fbde73">connect</a>( ttb, SIGNAL(clicked()), SLOT(<a href=#343>buttonClicked</a>()) ); grid-><a href="qgridlayout.html#dac29c">addWidget</a>( ttb, i%3, i/3 ); buttons->insert( i, ttb ); btArray->at(i) = TicTacButton::Blank; // initial button type } <a href="qtime.html">QTime</a> t = QTime::currentTime(); // set random seed srand( t.<a href="qtime.html#e582de">hour</a>()*12+t.<a href="qtime.html#83f0e2">minute</a>()*60+t.<a href="qtime.html#ca67be">second</a>()*60 );}TicTacGameBoard::~TicTacGameBoard(){ delete buttons; delete btArray;}// --------------------------------------------------------------------------// <a name="339"></a>TicTacGameBoard::computerStarts( bool v )//// Computer starts if v=TRUE. The human starts by default.//void <a name="339"></a>TicTacGameBoard::computerStarts( bool v ){ comp_starts = v;}// --------------------------------------------------------------------------// <a name="341"></a>TicTacGameBoard::newGame()//// Clears the game board and prepares for a new game//void <a name="341"></a>TicTacGameBoard::newGame(){ st = HumansTurn; for ( int i=0; i<nBoard*nBoard; i++ ) btArray->at(i) = TicTacButton::Blank; if ( comp_starts ) <a href=#349>computerMove</a>(); else <a href=#345>updateButtons</a>();}// --------------------------------------------------------------------------// <a name="343"></a>TicTacGameBoard::buttonClicked() - SLOT//// This slot is activated when a TicTacButton emits the signal "clicked()",// i.e. the user has clicked on a TicTacButton.//void <a name="343"></a>TicTacGameBoard::buttonClicked(){ if ( st != HumansTurn ) // not ready return; int i = buttons->findRef( (TicTacButton*)sender() );⌨️ 快捷键说明
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