// Copyright (C) 2016 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "tictactoe.h" #include #include using namespace Qt::StringLiterals; static inline QString defaultState() { return u"---------"_s; } TicTacToe::TicTacToe(QWidget *parent) : QWidget(parent), myState(defaultState()) { } QSize TicTacToe::minimumSizeHint() const { return {200, 200}; } QSize TicTacToe::sizeHint() const { return {200, 200}; } void TicTacToe::setState(const QString &newState) { turnNumber = 0; myState = defaultState(); const int count = qMin(9, int(newState.length())); for (int position = 0; position < count; ++position) { const QChar mark = newState.at(position); if (mark == Cross || mark == Nought) { ++turnNumber; myState[position] = mark; } } update(); } QString TicTacToe::state() const { return myState; } void TicTacToe::clearBoard() { myState = defaultState(); turnNumber = 0; update(); } void TicTacToe::mousePressEvent(QMouseEvent *event) { if (turnNumber == 9) { clearBoard(); return; } for (int position = 0; position < 9; ++position) { const QRect &cell = cellRect(position); if (cell.contains(event->position().toPoint())) { if (myState.at(position) == Empty) { myState[position] = turnNumber % 2 == 0 ? Cross : 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) { const QRect &cell = cellRect(position); 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)) { const int y = cellRect(position).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)) { const int x = cellRect(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 position) const { const int HMargin = width() / 30; const int VMargin = height() / 30; const int row = position / 3; const int column = position % 3; const QPoint pos{column * cellWidth() + HMargin, row * cellHeight() + VMargin}; const QSize size{cellWidth() - 2 * HMargin, cellHeight() - 2 * VMargin}; return {pos, size}; }