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# 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() );
     }