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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">gameboard.cpp Example File<br /><small><small>tutorial/t14/gameboard.cpp</small></small></h1>

<pre>  /****************************************************************************

** This file is part of the documentation of the Qt Toolkit.

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** as defined by Trolltech AS of Norway and appearing in the file

** LICENSE.QPL included in the packaging of this file.

** This file may be distributed and/or modified under the terms of the

** GNU General Public License version 2 as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL included in the

** packaging of this file.

** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for

** information about Qt Commercial License Agreements.

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** See http://www.trolltech.com/gpl/ for GPL licensing information.

** Contact info@trolltech.com if any conditions of this licensing are

** not clear to you.

** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE

** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

****************************************************************************/

/****************************************************************

** Implementation of GameBoard class, Qt tutorial 14

****************************************************************/

#include <QApplication>

#include <QFont>

#include <QGridLayout>

#include <QHBoxLayout>

#include <QLCDNumber>

#include <QLabel>

#include <QPushButton>

#include <QShortcut>

#include <QVBoxLayout>

#include <QWidget>

#include "cannonfield.h"

#include "gameboard.h"

#include "lcdrange.h"

GameBoard::GameBoard(QWidget *parent)

: QWidget(parent)

{

QPushButton *quit = new QPushButton("&Quit");

quit->setFont(QFont("Times", 18, QFont::Bold));

connect(quit, SIGNAL(clicked()), qApp, SLOT(quit()));

LCDRange *angle = new LCDRange("ANGLE");

angle->setRange(5, 70);

LCDRange *force = new LCDRange("FORCE");

force->setRange(10, 50);

QFrame *cannonBox = new QFrame;

cannonBox->setFrameStyle(QFrame::WinPanel | QFrame::Sunken);

cannonField = new CannonField;

connect(angle, SIGNAL(valueChanged(int)),

cannonField, SLOT(setAngle(int)));

connect(cannonField, SIGNAL(angleChanged(int)),

angle, SLOT(setValue(int)));

connect(force, SIGNAL(valueChanged(int)),

cannonField, SLOT(setForce(int)));

connect(cannonField, SIGNAL(forceChanged(int)),

force, SLOT(setValue(int)));

connect(cannonField, SIGNAL(hit()),

this, SLOT(hit()));

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connect(cannonField, SIGNAL(missed()),

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this, SLOT(missed()));

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QPushButton *shoot = new QPushButton("&Shoot");

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shoot->setFont(QFont("Times", 18, QFont::Bold));

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connect(shoot, SIGNAL(clicked()),

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this, SLOT(fire()));

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connect(cannonField, SIGNAL(canShoot(bool)),

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shoot, SLOT(setEnabled(bool)));

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QPushButton *restart = new QPushButton("&New Game");

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restart->setFont(QFont("Times", 18, QFont::Bold));

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connect(restart, SIGNAL(clicked()), this, SLOT(newGame()));

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hits = new QLCDNumber(2);

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shotsLeft = new QLCDNumber(2);

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QLabel *hitsLabel = new QLabel("HITS");

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QLabel *shotsLeftLabel = new QLabel("SHOTS LEFT");

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(void) new QShortcut(Qt::Key_Enter, this, SLOT(fire()));

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(void) new QShortcut(Qt::Key_Return, this, SLOT(fire()));

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(void) new QShortcut(Qt::CTRL + Qt::Key_Q, this, SLOT(close()));

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QHBoxLayout *topLayout = new QHBoxLayout;

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topLayout->addWidget(shoot);

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topLayout->addWidget(hits);

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topLayout->addWidget(hitsLabel);

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topLayout->addWidget(shotsLeft);

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topLayout->addWidget(shotsLeftLabel);

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topLayout->addStretch(1);

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topLayout->addWidget(restart);

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QVBoxLayout *leftLayout = new QVBoxLayout;

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leftLayout->addWidget(angle);

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leftLayout->addWidget(force);

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QVBoxLayout *cannonLayout = new QVBoxLayout;

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cannonLayout->addWidget(cannonField);

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cannonBox->setLayout(cannonLayout);

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QGridLayout *gridLayout = new QGridLayout;

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gridLayout->addWidget(quit, 0, 0);

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gridLayout->addLayout(topLayout, 0, 1);

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gridLayout->addLayout(leftLayout, 1, 0);

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gridLayout->addWidget(cannonBox, 1, 1, 2, 1);

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gridLayout->setColumnStretch(1, 10);

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setLayout(gridLayout);

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angle->setValue(60);

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force->setValue(25);

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angle->setFocus();

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newGame();

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}

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void GameBoard::fire()

158

{

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if (cannonField->gameOver() || cannonField->isShooting())

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return;

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shotsLeft->display(shotsLeft->intValue() - 1);

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cannonField->shoot();

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}

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void GameBoard::hit()

166

{

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hits->display(hits->intValue() + 1);

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if (shotsLeft->intValue() == 0)

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cannonField->setGameOver();

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else

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cannonField->newTarget();

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}

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void GameBoard::missed()

175

{

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if (shotsLeft->intValue() == 0)

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cannonField->setGameOver();

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}

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void GameBoard::newGame()

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{

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shotsLeft->display(15);

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hits->display(0);

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cannonField->restartGame();

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cannonField->newTarget();

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}</pre>

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