| /**************************************************************************** |
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| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the documentation of the Qt Toolkit. |
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| ** as follows: |
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| ****************************************************************************/ |
| |
| #include <QtWidgets> |
| |
| #include "window.h" |
| #include "movementtransition.h" |
| |
| //![0] |
| Window::Window() |
| { |
| pX = 5; |
| pY = 5; |
| //![0] |
| |
| QFontDatabase database; |
| QFont font; |
| if (database.families().contains("Monospace")) { |
| font = QFont("Monospace"); |
| } |
| else { |
| const QStringList fontFamilies = database.families(); |
| for (const QString &family : fontFamilies ) { |
| if (database.isFixedPitch(family)) { |
| font = QFont(family); |
| break; |
| } |
| } |
| } |
| 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 = qSqrt(dx*dx+dy*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; |
| |
| QState *inputState = new QState(machine); |
| inputState->assignProperty(this, "status", "Move the rogue with 2, 4, 6, and 8"); |
| |
| MovementTransition *transition = new MovementTransition(this); |
| inputState->addTransition(transition); |
| //![2] |
| |
| //![3] |
| QState *quitState = new QState(machine); |
| quitState->assignProperty(this, "status", "Really quit(y/n)?"); |
| |
| QKeyEventTransition *yesTransition = new |
| QKeyEventTransition(this, QEvent::KeyPress, Qt::Key_Y); |
| yesTransition->setTargetState(new QFinalState(machine)); |
| quitState->addTransition(yesTransition); |
| |
| QKeyEventTransition *noTransition = |
| new QKeyEventTransition(this, QEvent::KeyPress, Qt::Key_N); |
| noTransition->setTargetState(inputState); |
| quitState->addTransition(noTransition); |
| //![3] |
| |
| //![4] |
| QKeyEventTransition *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] = '.'; |
| } |
| } |
| |