Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "window.h"
++
++ #include <QtCore/QRandomGenerator>
++ #include <QtGui/QFont>
++ #include <QtGui/QPainter>
++ #include <QtStateMachine/QFinalState>
++ #include <QtStateMachine/QKeyEventTransition>
++ #include <QtWidgets/QApplication>
++
++ #include <cmath>
++
++ #include "movementtransition.h"
++
++ //![0]
++ Window::Window()
++ {
++ //![0]
++ QFont font("Monospace");
++ font.setStyleHint(QFont::TypeWriter);
++ font.setPointSize(12);
++ setFont(font);
++ //![1]
++ setupMap();
++ buildMachine();
++ }
++ //![1]
++
++ void Window::setStatus(const QString &status)
++ {
++ myStatus = status;
++ repaint();
++ }
++
++ QString Window::status() const
++ {
++ return myStatus;
++ }
++
++ void Window::paintEvent(QPaintEvent * /* event */)
++ {
++ QFontMetrics metrics(font());
++ QPainter painter(this);
++ int fontHeight = metrics.height();
++ int fontWidth = metrics.horizontalAdvance('X');
++ int yPos = fontHeight;
++ int xPos;
++
++ painter.fillRect(rect(), Qt::black);
++ painter.setPen(Qt::white);
++
++ painter.drawText(QPoint(0, yPos), status());
++
++ for (int y = 0; y < HEIGHT; ++y) {
++ yPos += fontHeight;
++ xPos = 0;
++
++ for (int x = 0; x < WIDTH; ++x) {
++ if (y == pY && x == pX) {
++ xPos += fontWidth;
++ continue;
++ }
++
++ painter.setPen(Qt::white);
++
++ double x1 = static_cast<double>(pX);
++ double y1 = static_cast<double>(pY);
++ double x2 = static_cast<double>(x);
++ double y2 = static_cast<double>(y);
++
++ if (x2 < x1) {
++ x2 += 0.5;
++ } else if (x2 > x1) {
++ x2 -= 0.5;
++ }
++
++ if (y2 < y1) {
++ y2 += 0.5;
++ } else if (y2 > y1) {
++ y2 -= 0.5;
++ }
++
++ double dx = x2 - x1;
++ double dy = y2 - y1;
++
++ double length = std::hypot(dx, dy);
++
++ dx /= length;
++ dy /= length;
++
++ double xi = x1;
++ double yi = y1;
++
++ while (length > 0) {
++ int cx = static_cast<int>(xi + 0.5);
++ int cy = static_cast<int>(yi + 0.5);
++
++ if (x2 == cx && y2 == cy)
++ break;
++
++ if (!(x1 == cx && y1 == cy) && (map[cx][cy] == '#' || (length - 10) > 0)) {
++ painter.setPen(QColor(60, 60, 60));
++ break;
++ }
++
++ xi += dx;
++ yi += dy;
++ --length;
++ }
++
++ painter.drawText(QPoint(xPos, yPos), map[x][y]);
++ xPos += fontWidth;
++ }
++ }
++ painter.setPen(Qt::white);
++ painter.drawText(QPoint(pX * fontWidth, (pY + 2) * fontHeight), QChar('@'));
++ }
++
++ QSize Window::sizeHint() const
++ {
++ QFontMetrics metrics(font());
++
++ return QSize(metrics.horizontalAdvance('X') * WIDTH, metrics.height() * (HEIGHT + 1));
++ }
++
++ //![2]
++ void Window::buildMachine()
++ {
++ machine = new QStateMachine;
++
++ auto inputState = new QState(machine);
++ inputState->assignProperty(this, "status", "Move the rogue with 2, 4, 6, and 8");
++
++ auto transition = new MovementTransition(this);
++ inputState->addTransition(transition);
++ //![2]
++
++ //![3]
++ auto quitState = new QState(machine);
++ quitState->assignProperty(this, "status", "Really quit(y/n)?");
++
++ auto yesTransition = new QKeyEventTransition(this, QEvent::KeyPress, Qt::Key_Y);
++ yesTransition->setTargetState(new QFinalState(machine));
++ quitState->addTransition(yesTransition);
++
++ auto noTransition = new QKeyEventTransition(this, QEvent::KeyPress, Qt::Key_N);
++ noTransition->setTargetState(inputState);
++ quitState->addTransition(noTransition);
++ //![3]
++
++ //![4]
++ auto quitTransition = new QKeyEventTransition(this, QEvent::KeyPress, Qt::Key_Q);
++ quitTransition->setTargetState(quitState);
++ inputState->addTransition(quitTransition);
++ //![4]
++
++ //![5]
++ machine->setInitialState(inputState);
++
++ connect(machine, &QStateMachine::finished, qApp, &QApplication::quit);
++
++ machine->start();
++ }
++ //![5]
++
++ void Window::movePlayer(Direction direction)
++ {
++ switch (direction) {
++ case Left:
++ if (map[pX - 1][pY] != '#')
++ --pX;
++ break;
++ case Right:
++ if (map[pX + 1][pY] != '#')
++ ++pX;
++ break;
++ case Up:
++ if (map[pX][pY - 1] != '#')
++ --pY;
++ break;
++ case Down:
++ if (map[pX][pY + 1] != '#')
++ ++pY;
++ break;
++ }
++ repaint();
++ }
++
++ void Window::setupMap()
++ {
++ for (int x = 0; x < WIDTH; ++x)
++ for (int y = 0; y < HEIGHT; ++y) {
++ if (x == 0 || x == WIDTH - 1 || y == 0 || y == HEIGHT - 1 || QRandomGenerator::global()->bounded(40) == 0)
++ map[x][y] = '#';
++ else
++ map[x][y] = '.';
++ }
++ }
++