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 #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(tr("&amp;Quit"));
     quit->setFont(QFont("Times", 18, QFont::Bold));
 
     connect(quit, SIGNAL(clicked()), qApp, SLOT(quit()));
 
     LCDRange *angle = new LCDRange(tr("ANGLE"));
     angle->setRange(5, 70);
 
     LCDRange *force = new LCDRange(tr("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()));
     connect(cannonField, SIGNAL(missed()),
             this, SLOT(missed()));
 
     QPushButton *shoot = new QPushButton(tr("&amp;Shoot"));
     shoot->setFont(QFont("Times", 18, QFont::Bold));
 
     connect(shoot, SIGNAL(clicked()),
             this, SLOT(fire()));
     connect(cannonField, SIGNAL(canShoot(bool)),
             shoot, SLOT(setEnabled(bool)));
 
     QPushButton *restart = new QPushButton(tr("&amp;New Game"));
     restart->setFont(QFont("Times", 18, QFont::Bold));
 
     connect(restart, SIGNAL(clicked()), this, SLOT(newGame()));
 
     hits = new QLCDNumber(2);
     hits->setSegmentStyle(QLCDNumber::Filled);
 
     shotsLeft = new QLCDNumber(2);
     shotsLeft->setSegmentStyle(QLCDNumber::Filled);
 
     QLabel *hitsLabel = new QLabel(tr("HITS"));
     QLabel *shotsLeftLabel = new QLabel(tr("SHOTS LEFT"));
 
     (void) new QShortcut(Qt::Key_Enter, this, SLOT(fire()));
     (void) new QShortcut(Qt::Key_Return, this, SLOT(fire()));
     (void) new QShortcut(Qt::CTRL + Qt::Key_Q, this, SLOT(close()));
 
     QHBoxLayout *topLayout = new QHBoxLayout;
     topLayout->addWidget(shoot);
     topLayout->addWidget(hits);
     topLayout->addWidget(hitsLabel);
     topLayout->addWidget(shotsLeft);
     topLayout->addWidget(shotsLeftLabel);
     topLayout->addStretch(1);
     topLayout->addWidget(restart);
 
     QVBoxLayout *leftLayout = new QVBoxLayout;
     leftLayout->addWidget(angle);
     leftLayout->addWidget(force);
 
     QVBoxLayout *cannonLayout = new QVBoxLayout;
     cannonLayout->addWidget(cannonField);
     cannonBox->setLayout(cannonLayout);
 
     QGridLayout *gridLayout = new QGridLayout;
     gridLayout->addWidget(quit, 0, 0);
     gridLayout->addLayout(topLayout, 0, 1);
     gridLayout->addLayout(leftLayout, 1, 0);
     gridLayout->addWidget(cannonBox, 1, 1, 2, 1);
     gridLayout->setColumnStretch(1, 10);
     setLayout(gridLayout);
 
     angle->setValue(60);
     force->setValue(25);
     angle->setFocus();
 
     newGame();
 }
 
 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();
 }