toplevel.cpp Example File
^{graphicsview/portedasteroids/toplevel.cpp}

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 /*
  * KAsteroids - Copyright (c) Martin R. Jones 1997
  *
  * Part of the KDE project
  */
 //      --- toplevel.cpp ---
 #include <q3accel.h>
 #include <qlabel.h>
 #include <qlayout.h>
 #include <qlcdnumber.h>
 #include <qpushbutton.h>

 #include <qapplication.h>
 //Added by qt3to4:
 #include <Q3HBoxLayout>
 #include <QShowEvent>
 #include <Q3Frame>
 #include <QPixmap>
 #include <QHideEvent>
 #include <QKeyEvent>
 #include <Q3VBoxLayout>

 #include "toplevel.h"
 #include "ledmeter.h"

 #define SB_SCORE        1
 #define SB_LEVEL        2
 #define SB_SHIPS        3

 struct SLevel
 {
     int    nrocks;
     double rockSpeed;
 };

 #define MAX_LEVELS      16

 SLevel levels[MAX_LEVELS] =
 {
     { 1, 0.4 },
     { 1, 0.6 },
     { 2, 0.5 },
     { 2, 0.7 },
     { 2, 0.8 },
     { 3, 0.6 },
     { 3, 0.7 },
     { 3, 0.8 },
     { 4, 0.6 },
     { 4, 0.7 },
     { 4, 0.8 },
     { 5, 0.7 },
     { 5, 0.8 },
     { 5, 0.9 },
     { 5, 1.0 }
 };

 const char *soundEvents[] =
 {
     "ShipDestroyed",
     "RockDestroyed",
     0
 };

 const char *soundDefaults[] =
 {
     "Explosion.wav",
     "ploop.wav",
     0
 };

 KAstTopLevel::KAstTopLevel( QWidget *parent, const char *name )
     : Q3MainWindow( parent, name, 0 )
 {
     QWidget *border = new QWidget( this );
     border->setBackgroundColor( Qt::black );
     setCentralWidget( border );

     Q3VBoxLayout *borderLayout = new Q3VBoxLayout( border );
     borderLayout->addStretch( 1 );

     QWidget *mainWin = new QWidget( border );
     mainWin->setFixedSize(640, 480);
     borderLayout->addWidget( mainWin, 0, Qt::AlignHCenter );

     borderLayout->addStretch( 1 );

     view = new KAsteroidsView( mainWin );
     view->setFocusPolicy( Qt::StrongFocus );
     connect( view, SIGNAL( shipKilled() ), SLOT( slotShipKilled() ) );
     connect( view, SIGNAL( rockHit(int) ), SLOT( slotRockHit(int) ) );
     connect( view, SIGNAL( rocksRemoved() ), SLOT( slotRocksRemoved() ) );
     connect( view, SIGNAL( updateVitals() ), SLOT( slotUpdateVitals() ) );

     Q3VBoxLayout *vb = new Q3VBoxLayout( mainWin );
     Q3HBoxLayout *hb = new Q3HBoxLayout;
     Q3HBoxLayout *hbd = new Q3HBoxLayout;
     vb->addLayout( hb );

     QFont labelFont( "helvetica", 24 );
     QColorGroup grp( Qt::darkGreen, Qt::black, QColor( 128, 128, 128 ),
             QColor( 64, 64, 64 ), Qt::black, Qt::darkGreen, Qt::black );
     QPalette pal( grp, grp, grp );

     mainWin->setPalette( pal );

     hb->addSpacing( 10 );

     QLabel *label;
     label = new QLabel( tr("Score"), mainWin );
     label->setFont( labelFont );
     label->setPalette( pal );
     label->setFixedWidth( label->sizeHint().width() );
     hb->addWidget( label );

     scoreLCD = new QLCDNumber( 6, mainWin );
     scoreLCD->setFrameStyle( Q3Frame::NoFrame );
     scoreLCD->setSegmentStyle( QLCDNumber::Flat );
     scoreLCD->setFixedWidth( 150 );
     scoreLCD->setPalette( pal );
     hb->addWidget( scoreLCD );
     hb->addStretch( 10 );

     label = new QLabel( tr("Level"), mainWin );
     label->setFont( labelFont );
     label->setPalette( pal );
     label->setFixedWidth( label->sizeHint().width() );
     hb->addWidget( label );

     levelLCD = new QLCDNumber( 2, mainWin );
     levelLCD->setFrameStyle( Q3Frame::NoFrame );
     levelLCD->setSegmentStyle( QLCDNumber::Flat );
     levelLCD->setFixedWidth( 70 );
     levelLCD->setPalette( pal );
     hb->addWidget( levelLCD );
     hb->addStretch( 10 );

     label = new QLabel( tr("Ships"), mainWin );
     label->setFont( labelFont );
     label->setFixedWidth( label->sizeHint().width() );
     label->setPalette( pal );
     hb->addWidget( label );

     shipsLCD = new QLCDNumber( 1, mainWin );
     shipsLCD->setFrameStyle( Q3Frame::NoFrame );
     shipsLCD->setSegmentStyle( QLCDNumber::Flat );
     shipsLCD->setFixedWidth( 40 );
     shipsLCD->setPalette( pal );
     hb->addWidget( shipsLCD );

     hb->addStrut( 30 );

     vb->addWidget( view, 10 );

 // -- bottom layout:
     vb->addLayout( hbd );

     QFont smallFont( "helvetica", 14 );
     hbd->addSpacing( 10 );

     QString sprites_prefix = ":/trolltech/examples/graphicsview/portedasteroids/sprites/";
 /*
     label = new QLabel( tr( "T" ), mainWin );
     label->setFont( smallFont );
     label->setFixedWidth( label->sizeHint().width() );
     label->setPalette( pal );
     hbd->addWidget( label );

     teleportsLCD = new QLCDNumber( 1, mainWin );
     teleportsLCD->setFrameStyle( QFrame::NoFrame );
     teleportsLCD->setSegmentStyle( QLCDNumber::Flat );
     teleportsLCD->setPalette( pal );
     teleportsLCD->setFixedHeight( 20 );
     hbd->addWidget( teleportsLCD );

     hbd->addSpacing( 10 );
 */
     QPixmap pm( sprites_prefix + "powerups/brake.png" );
     label = new QLabel( mainWin );
     label->setPixmap( pm );
     label->setFixedWidth( label->sizeHint().width() );
     label->setPalette( pal );
     hbd->addWidget( label );

     brakesLCD = new QLCDNumber( 1, mainWin );
     brakesLCD->setFrameStyle( Q3Frame::NoFrame );
     brakesLCD->setSegmentStyle( QLCDNumber::Flat );
     brakesLCD->setPalette( pal );
     brakesLCD->setFixedHeight( 20 );
     hbd->addWidget( brakesLCD );

     hbd->addSpacing( 10 );

     pm.load( sprites_prefix + "powerups/shield.png" );
     label = new QLabel( mainWin );
     label->setPixmap( pm );
     label->setFixedWidth( label->sizeHint().width() );
     label->setPalette( pal );
     hbd->addWidget( label );

     shieldLCD = new QLCDNumber( 1, mainWin );
     shieldLCD->setFrameStyle( Q3Frame::NoFrame );
     shieldLCD->setSegmentStyle( QLCDNumber::Flat );
     shieldLCD->setPalette( pal );
     shieldLCD->setFixedHeight( 20 );
     hbd->addWidget( shieldLCD );

     hbd->addSpacing( 10 );

     pm.load( sprites_prefix + "powerups/shoot.png" );
     label = new QLabel( mainWin );
     label->setPixmap( pm );
     label->setFixedWidth( label->sizeHint().width() );
     label->setPalette( pal );
     hbd->addWidget( label );

     shootLCD = new QLCDNumber( 1, mainWin );
     shootLCD->setFrameStyle( Q3Frame::NoFrame );
     shootLCD->setSegmentStyle( QLCDNumber::Flat );
     shootLCD->setPalette( pal );
     shootLCD->setFixedHeight( 20 );
     hbd->addWidget( shootLCD );

     hbd->addStretch( 1 );

     label = new QLabel( tr( "Fuel" ), mainWin );
     label->setFont( smallFont );
     label->setFixedWidth( label->sizeHint().width() + 10 );
     label->setPalette( pal );
     hbd->addWidget( label );

     powerMeter = new KALedMeter( mainWin );
     powerMeter->setFrameStyle( Q3Frame::Box | Q3Frame::Plain );
     powerMeter->setRange( MAX_POWER_LEVEL );
     powerMeter->addColorRange( 10, Qt::darkRed );
     powerMeter->addColorRange( 20, QColor(160, 96, 0) );
     powerMeter->addColorRange( 70, Qt::darkGreen );
     powerMeter->setCount( 40 );
     powerMeter->setPalette( pal );
     powerMeter->setFixedSize( 200, 12 );
     hbd->addWidget( powerMeter );

     shipsRemain = 3;
     showHiscores = FALSE;

     actions.insert( Qt::Key_Up, Thrust );
     actions.insert( Qt::Key_Left, RotateLeft );
     actions.insert( Qt::Key_Right, RotateRight );
     actions.insert( Qt::Key_Space, Shoot );
     actions.insert( Qt::Key_Z, Teleport );
     actions.insert( Qt::Key_X, Brake );
     actions.insert( Qt::Key_S, Shield );
     actions.insert( Qt::Key_P, Pause );
     actions.insert( Qt::Key_L, Launch );
     actions.insert( Qt::Key_N, NewGame );

     view->showText( tr( "Press N to start playing" ), Qt::yellow );
 }

 KAstTopLevel::~KAstTopLevel()
 {
 }

 void KAstTopLevel::playSound( const char * )
 {
 }

 void KAstTopLevel::keyPressEvent( QKeyEvent *event )
 {
     if ( event->isAutoRepeat() || !actions.contains( event->key() ) )
     {
         event->ignore();
         return;
     }

     Action a = actions[ event->key() ];

     switch ( a )
     {
         case RotateLeft:
             view->rotateLeft( TRUE );
             break;

         case RotateRight:
             view->rotateRight( TRUE );
             break;

         case Thrust:
             view->thrust( TRUE );
             break;

         case Shoot:
             view->shoot( TRUE );
             break;

         case Shield:
             view->setShield( TRUE );
             break;

         case Teleport:
             view->teleport( TRUE );
             break;

         case Brake:
             view->brake( TRUE );
             break;

         default:
             event->ignore();
             return;
     }
     event->accept();
 }

 void KAstTopLevel::keyReleaseEvent( QKeyEvent *event )
 {
     if ( event->isAutoRepeat() || !actions.contains( event->key() ) )
     {
         event->ignore();
         return;
     }

     Action a = actions[ event->key() ];

     switch ( a )
     {
         case RotateLeft:
             view->rotateLeft( FALSE );
             break;

         case RotateRight:
             view->rotateRight( FALSE );
             break;

         case Thrust:
             view->thrust( FALSE );
             break;

         case Shoot:
             view->shoot( FALSE );
             break;

         case Brake:
             view->brake( FALSE );
             break;

         case Shield:
             view->setShield( FALSE );
             break;

         case Teleport:
             view->teleport( FALSE );
             break;

         case Launch:
             if ( waitShip )
             {
                 view->newShip();
                 waitShip = FALSE;
                 view->hideText();
             }
             else
             {
                 event->ignore();
                 return;
             }
             break;

         case NewGame:
             slotNewGame();
             break;
 /*
         case Pause:
             {
                 view->pause( TRUE );
                 QMessageBox::information( this,
                                           tr("KAsteroids is paused"),
                                           tr("Paused") );
                 view->pause( FALSE );
             }
             break;
 */
         default:
             event->ignore();
             return;
     }

     event->accept();
 }

 void KAstTopLevel::showEvent( QShowEvent *e )
 {
     Q3MainWindow::showEvent( e );
     view->pause( FALSE );
     view->setFocus();
 }

 void KAstTopLevel::hideEvent( QHideEvent *e )
 {
     Q3MainWindow::hideEvent( e );
     view->pause( TRUE );
 }

 void KAstTopLevel::slotNewGame()
 {
     score = 0;
     shipsRemain = SB_SHIPS;
     scoreLCD->display( 0 );
     level = 0;
     levelLCD->display( level+1 );
     shipsLCD->display( shipsRemain-1 );
     view->newGame();
     view->setRockSpeed( levels[0].rockSpeed );
     view->addRocks( levels[0].nrocks );
 //    view->showText( tr( "Press L to launch." ), yellow );
     view->newShip();
     waitShip = FALSE;
     view->hideText();
     isPaused = FALSE;
 }

 void KAstTopLevel::slotShipKilled()
 {
     shipsRemain--;
     shipsLCD->display( shipsRemain-1 );

     playSound( "ShipDestroyed" );

     if ( shipsRemain )
     {
         waitShip = TRUE;
         view->showText( tr( "Ship Destroyed. Press L to launch."), Qt::yellow );
     }
     else
     {
         view->showText( tr("Game Over!"), Qt::red );
         view->endGame();
         doStats();
 //        highscore->addEntry( score, level, showHiscores );
     }
 }

 void KAstTopLevel::slotRockHit( int size )
 {
     switch ( size )
     {
         case 0:
             score += 10;
              break;

         case 1:
             score += 20;
             break;

         default:
             score += 40;
       }

     playSound( "RockDestroyed" );

     scoreLCD->display( score );
 }

 void KAstTopLevel::slotRocksRemoved()
 {
     level++;

     if ( level >= MAX_LEVELS )
         level = MAX_LEVELS - 1;

     view->setRockSpeed( levels[level-1].rockSpeed );
     view->addRocks( levels[level-1].nrocks );

     levelLCD->display( level+1 );
 }

 void KAstTopLevel::doStats()
 {
     QString r( "0.00" );
     if ( view->shots() )
          r = QString::number( (double)view->hits() / view->shots() * 100.0,
                              'g', 2 );

 /* multi-line text broken in Qt 3
     QString s = tr( "Game Over\n\nShots fired:\t%1\n  Hit:\t%2\n  Missed:\t%3\nHit ratio:\t%4 %\n\nPress N for a new game" )
       .arg(view->shots()).arg(view->hits())
       .arg(view->shots() - view->hits())
       .arg(r);
 */

     view->showText( "Game Over.   Press N for a new game.", Qt::yellow, FALSE );
 }

 void KAstTopLevel::slotUpdateVitals()
 {
     brakesLCD->display( view->brakeCount() );
     shieldLCD->display( view->shieldCount() );
     shootLCD->display( view->shootCount() );
 //    teleportsLCD->display( view->teleportCount() );
     powerMeter->setValue( view->power() );
 }