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| |
| #include "tictactoe.h" |
| |
| #include <QMouseEvent> |
| #include <QPainter> |
| |
| static inline QString defaultState() { return QStringLiteral("---------"); } |
| |
| TicTacToe::TicTacToe(QWidget *parent) |
| : QWidget(parent) |
| { |
| } |
| |
| QSize TicTacToe::minimumSizeHint() const |
| { |
| return QSize(200, 200); |
| } |
| |
| QSize TicTacToe::sizeHint() const |
| { |
| return QSize(200, 200); |
| } |
| |
| void TicTacToe::setState(const QString &newState) |
| { |
| turnNumber = 0; |
| myState = defaultState(); |
| int position = 0; |
| while (position < 9 && position < newState.length()) { |
| QChar mark = newState.at(position); |
| if (mark == Cross || mark == Nought) { |
| ++turnNumber; |
| myState.replace(position, 1, mark); |
| } |
| position++; |
| } |
| update(); |
| } |
| |
| QString TicTacToe::state() const |
| { |
| return myState; |
| } |
| |
| void TicTacToe::clearBoard() |
| { |
| myState = defaultState(); |
| turnNumber = 0; |
| update(); |
| } |
| |
| void TicTacToe::mousePressEvent(QMouseEvent *event) |
| { |
| if (turnNumber == 9) { |
| clearBoard(); |
| update(); |
| } else { |
| for (int position = 0; position < 9; ++position) { |
| QRect cell = cellRect(position / 3, position % 3); |
| if (cell.contains(event->pos())) { |
| if (myState.at(position) == Empty) { |
| if (turnNumber % 2 == 0) |
| myState.replace(position, 1, Cross); |
| else |
| myState.replace(position, 1, Nought); |
| ++turnNumber; |
| update(); |
| } |
| } |
| } |
| } |
| } |
| |
| void TicTacToe::paintEvent(QPaintEvent * /* event */) |
| { |
| QPainter painter(this); |
| painter.setRenderHint(QPainter::Antialiasing); |
| |
| painter.setPen(QPen(Qt::darkGreen, 1)); |
| painter.drawLine(cellWidth(), 0, cellWidth(), height()); |
| painter.drawLine(2 * cellWidth(), 0, 2 * cellWidth(), height()); |
| painter.drawLine(0, cellHeight(), width(), cellHeight()); |
| painter.drawLine(0, 2 * cellHeight(), width(), 2 * cellHeight()); |
| |
| painter.setPen(QPen(Qt::darkBlue, 2)); |
| |
| for (int position = 0; position < 9; ++position) { |
| QRect cell = cellRect(position / 3, position % 3); |
| |
| if (myState.at(position) == Cross) { |
| painter.drawLine(cell.topLeft(), cell.bottomRight()); |
| painter.drawLine(cell.topRight(), cell.bottomLeft()); |
| } else if (myState.at(position) == Nought) { |
| painter.drawEllipse(cell); |
| } |
| } |
| |
| painter.setPen(QPen(Qt::yellow, 3)); |
| |
| for (int position = 0; position < 9; position = position + 3) { |
| if (myState.at(position) != Empty |
| && myState.at(position + 1) == myState.at(position) |
| && myState.at(position + 2) == myState.at(position)) { |
| int y = cellRect((position / 3), 0).center().y(); |
| painter.drawLine(0, y, width(), y); |
| turnNumber = 9; |
| } |
| } |
| |
| for (int position = 0; position < 3; ++position) { |
| if (myState.at(position) != Empty |
| && myState.at(position + 3) == myState.at(position) |
| && myState.at(position + 6) == myState.at(position)) { |
| int x = cellRect(0, position).center().x(); |
| painter.drawLine(x, 0, x, height()); |
| turnNumber = 9; |
| } |
| } |
| if (myState.at(0) != Empty && myState.at(4) == myState.at(0) |
| && myState.at(8) == myState.at(0)) { |
| painter.drawLine(0, 0, width(), height()); |
| turnNumber = 9; |
| } |
| if (myState.at(2) != Empty && myState.at(4) == myState.at(2) |
| && myState.at(6) == myState.at(2)) { |
| painter.drawLine(0, height(), width(), 0); |
| turnNumber = 9; |
| } |
| } |
| |
| QRect TicTacToe::cellRect(int row, int column) const |
| { |
| const int HMargin = width() / 30; |
| const int VMargin = height() / 30; |
| return QRect(column * cellWidth() + HMargin, |
| row * cellHeight() + VMargin, |
| cellWidth() - 2 * HMargin, |
| cellHeight() - 2 * VMargin); |
| } |