Qt tutorial - t13/gamebrd.cpp

# Source code for tutorial 13: gamebrd.cpp

    /****************************************************************
    **
    ** Implementation of GameBoard class, Qt tutorial 13
    **
    ****************************************************************/

    #include "gamebrd.h"

    #include <qfont.h>
    #include <qapplication.h>
    #include <qlabel.h>
    #include <qpushbutton.h>
    #include <qlcdnumber.h>

    #include "lcdrange.h"
    #include "cannon.h"

    GameBoard::GameBoard( QWidget *parent, const char *name )
            : QWidget( parent, name )
    {
        setMinimumSize( 500, 355 );

        quit = new QPushButton( "Quit", this, "quit" );
        quit->setFont( QFont( "Times", 18, QFont::Bold ) );

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

        angle  = new LCDRange( "ANGLE", this, "angle" );
        angle->setRange( 5, 70 );

        force  = new LCDRange( "FORCE", this, "force" );
        force->setRange( 10, 50 );

        cannonField = new CannonField( this, "cannonField" );
        cannonField->setBackgroundColor( QColor( 250, 250, 200) );

        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()),SLOT(hit()) );
        connect( cannonField, SIGNAL(missed()),SLOT(missed()) );

        angle->setValue( 60 );
        force->setValue( 25 );

        shoot = new QPushButton( "Shoot", this, "shoot" );
        shoot->setFont( QFont( "Times", 18, QFont::Bold ) );

        connect( shoot, SIGNAL(clicked()), SLOT(fire()) );

        restart = new QPushButton( "New Game", this, "newgame" );
        restart->setFont( QFont( "Times", 18, QFont::Bold ) );

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

        hits               = new QLCDNumber( 2, this, "hits" );
        shotsLeft          = new QLCDNumber( 2, this, "shotsleft" );
        QLabel *hitsL      = new QLabel( "HITS", this, "hitsLabel" );
        QLabel *shotsLeftL = new QLabel( "SHOTS LEFT", this, "shotsleftLabel" );

        quit->setGeometry( 10, 10, 75, 30 );
        angle->setGeometry( 10, quit->y() + quit->height() + 10, 75, 130 );
        force->setGeometry( 10, angle->y() + angle->height() + 10, 75, 130 );
        cannonField->move( angle->x() + angle->width() + 10, angle->y() );
        shoot->setGeometry( 10, 315, 75, 30 );
        restart->setGeometry( 380, 10, 110, 30 );
        hits->setGeometry( 130, 10, 40, 30 );
        hitsL->setGeometry( hits->x() + hits->width() + 5, 10, 60, 30 );
        shotsLeft->setGeometry( 240, 10, 40, 30 );
        shotsLeftL->setGeometry( shotsLeft->x()+shotsLeft->width()+5, 10, 60, 30 );

        newGame();
    }

    void GameBoard::resizeEvent( QResizeEvent * )
    {
        cannonField->resize( width()  - cannonField->x() - 10,
                             height() - cannonField->y() - 10 );
    }

    void GameBoard::fire()
    {
        if ( cannonField->gameOver() || cannonField->isShooting() )
            return;
        shotsLeft->display( shotsLeft->intValue() - 1 );
        cannonField->shoot();
    }

    void GameBoard::hit()
    {
        hits->display( hits->intValue() + 1 );
        if ( shotsLeft->intValue() == 0 )
            cannonField->setGameOver();
        else
            cannonField->newTarget();
    }

    void GameBoard::missed()
    {
        if ( shotsLeft->intValue() == 0 )
            cannonField->setGameOver();
    }

    void GameBoard::newGame()
    {
        shotsLeft->display( 15 );
        hits->display( 0 );
        cannonField->restartGame();
        cannonField->newTarget();
    }