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diff --git a/examples/widgets/widgets/tetrix/tetrixboard.cpp b/examples/widgets/widgets/tetrix/tetrixboard.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of The Qt Company Ltd nor the names of its
-** contributors may be used to endorse or promote products derived
-** from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "tetrixboard.h"
-
-#include <QKeyEvent>
-#include <QLabel>
-#include <QPainter>
-
-//! [0]
-TetrixBoard::TetrixBoard(QWidget *parent)
- : QFrame(parent), isStarted(false), isPaused(false)
-{
- setFrameStyle(QFrame::Panel | QFrame::Sunken);
- setFocusPolicy(Qt::StrongFocus);
- clearBoard();
-
- nextPiece.setRandomShape();
-}
-//! [0]
-
-//! [1]
-void TetrixBoard::setNextPieceLabel(QLabel *label)
-{
- nextPieceLabel = label;
-}
-//! [1]
-
-//! [2]
-QSize TetrixBoard::sizeHint() const
-{
- return QSize(BoardWidth * 15 + frameWidth() * 2,
- BoardHeight * 15 + frameWidth() * 2);
-}
-
-QSize TetrixBoard::minimumSizeHint() const
-//! [2] //! [3]
-{
- return QSize(BoardWidth * 5 + frameWidth() * 2,
- BoardHeight * 5 + frameWidth() * 2);
-}
-//! [3]
-
-//! [4]
-void TetrixBoard::start()
-{
- if (isPaused)
- return;
-
- isStarted = true;
- isWaitingAfterLine = false;
- numLinesRemoved = 0;
- numPiecesDropped = 0;
- score = 0;
- level = 1;
- clearBoard();
-
- emit linesRemovedChanged(numLinesRemoved);
- emit scoreChanged(score);
- emit levelChanged(level);
-
- newPiece();
- timer.start(timeoutTime(), this);
-}
-//! [4]
-
-//! [5]
-void TetrixBoard::pause()
-{
- if (!isStarted)
- return;
-
- isPaused = !isPaused;
- if (isPaused) {
- timer.stop();
- } else {
- timer.start(timeoutTime(), this);
- }
- update();
-//! [5] //! [6]
-}
-//! [6]
-
-//! [7]
-void TetrixBoard::paintEvent(QPaintEvent *event)
-{
- QFrame::paintEvent(event);
-
- QPainter painter(this);
- QRect rect = contentsRect();
-//! [7]
-
- if (isPaused) {
- painter.drawText(rect, Qt::AlignCenter, tr("Pause"));
- return;
- }
-
-//! [8]
- int boardTop = rect.bottom() - BoardHeight*squareHeight();
-
- for (int i = 0; i < BoardHeight; ++i) {
- for (int j = 0; j < BoardWidth; ++j) {
- TetrixShape shape = shapeAt(j, BoardHeight - i - 1);
- if (shape != NoShape)
- drawSquare(painter, rect.left() + j * squareWidth(),
- boardTop + i * squareHeight(), shape);
- }
-//! [8] //! [9]
- }
-//! [9]
-
-//! [10]
- if (curPiece.shape() != NoShape) {
- for (int i = 0; i < 4; ++i) {
- int x = curX + curPiece.x(i);
- int y = curY - curPiece.y(i);
- drawSquare(painter, rect.left() + x * squareWidth(),
- boardTop + (BoardHeight - y - 1) * squareHeight(),
- curPiece.shape());
- }
-//! [10] //! [11]
- }
-//! [11] //! [12]
-}
-//! [12]
-
-//! [13]
-void TetrixBoard::keyPressEvent(QKeyEvent *event)
-{
- if (!isStarted || isPaused || curPiece.shape() == NoShape) {
- QFrame::keyPressEvent(event);
- return;
- }
-//! [13]
-
-//! [14]
- switch (event->key()) {
- case Qt::Key_Left:
- tryMove(curPiece, curX - 1, curY);
- break;
- case Qt::Key_Right:
- tryMove(curPiece, curX + 1, curY);
- break;
- case Qt::Key_Down:
- tryMove(curPiece.rotatedRight(), curX, curY);
- break;
- case Qt::Key_Up:
- tryMove(curPiece.rotatedLeft(), curX, curY);
- break;
- case Qt::Key_Space:
- dropDown();
- break;
- case Qt::Key_D:
- oneLineDown();
- break;
- default:
- QFrame::keyPressEvent(event);
- }
-//! [14]
-}
-
-//! [15]
-void TetrixBoard::timerEvent(QTimerEvent *event)
-{
- if (event->timerId() == timer.timerId()) {
- if (isWaitingAfterLine) {
- isWaitingAfterLine = false;
- newPiece();
- timer.start(timeoutTime(), this);
- } else {
- oneLineDown();
- }
- } else {
- QFrame::timerEvent(event);
-//! [15] //! [16]
- }
-//! [16] //! [17]
-}
-//! [17]
-
-//! [18]
-void TetrixBoard::clearBoard()
-{
- for (int i = 0; i < BoardHeight * BoardWidth; ++i)
- board[i] = NoShape;
-}
-//! [18]
-
-//! [19]
-void TetrixBoard::dropDown()
-{
- int dropHeight = 0;
- int newY = curY;
- while (newY > 0) {
- if (!tryMove(curPiece, curX, newY - 1))
- break;
- --newY;
- ++dropHeight;
- }
- pieceDropped(dropHeight);
-//! [19] //! [20]
-}
-//! [20]
-
-//! [21]
-void TetrixBoard::oneLineDown()
-{
- if (!tryMove(curPiece, curX, curY - 1))
- pieceDropped(0);
-}
-//! [21]
-
-//! [22]
-void TetrixBoard::pieceDropped(int dropHeight)
-{
- for (int i = 0; i < 4; ++i) {
- int x = curX + curPiece.x(i);
- int y = curY - curPiece.y(i);
- shapeAt(x, y) = curPiece.shape();
- }
-
- ++numPiecesDropped;
- if (numPiecesDropped % 25 == 0) {
- ++level;
- timer.start(timeoutTime(), this);
- emit levelChanged(level);
- }
-
- score += dropHeight + 7;
- emit scoreChanged(score);
- removeFullLines();
-
- if (!isWaitingAfterLine)
- newPiece();
-//! [22] //! [23]
-}
-//! [23]
-
-//! [24]
-void TetrixBoard::removeFullLines()
-{
- int numFullLines = 0;
-
- for (int i = BoardHeight - 1; i >= 0; --i) {
- bool lineIsFull = true;
-
- for (int j = 0; j < BoardWidth; ++j) {
- if (shapeAt(j, i) == NoShape) {
- lineIsFull = false;
- break;
- }
- }
-
- if (lineIsFull) {
-//! [24] //! [25]
- ++numFullLines;
- for (int k = i; k < BoardHeight - 1; ++k) {
- for (int j = 0; j < BoardWidth; ++j)
- shapeAt(j, k) = shapeAt(j, k + 1);
- }
-//! [25] //! [26]
- for (int j = 0; j < BoardWidth; ++j)
- shapeAt(j, BoardHeight - 1) = NoShape;
- }
-//! [26] //! [27]
- }
-//! [27]
-
-//! [28]
- if (numFullLines > 0) {
- numLinesRemoved += numFullLines;
- score += 10 * numFullLines;
- emit linesRemovedChanged(numLinesRemoved);
- emit scoreChanged(score);
-
- timer.start(500, this);
- isWaitingAfterLine = true;
- curPiece.setShape(NoShape);
- update();
- }
-//! [28] //! [29]
-}
-//! [29]
-
-//! [30]
-void TetrixBoard::newPiece()
-{
- curPiece = nextPiece;
- nextPiece.setRandomShape();
- showNextPiece();
- curX = BoardWidth / 2 + 1;
- curY = BoardHeight - 1 + curPiece.minY();
-
- if (!tryMove(curPiece, curX, curY)) {
- curPiece.setShape(NoShape);
- timer.stop();
- isStarted = false;
- }
-//! [30] //! [31]
-}
-//! [31]
-
-//! [32]
-void TetrixBoard::showNextPiece()
-{
- if (!nextPieceLabel)
- return;
-
- int dx = nextPiece.maxX() - nextPiece.minX() + 1;
- int dy = nextPiece.maxY() - nextPiece.minY() + 1;
-
- QPixmap pixmap(dx * squareWidth(), dy * squareHeight());
- QPainter painter(&pixmap);
- painter.fillRect(pixmap.rect(), nextPieceLabel->palette().window());
-
- for (int i = 0; i < 4; ++i) {
- int x = nextPiece.x(i) - nextPiece.minX();
- int y = nextPiece.y(i) - nextPiece.minY();
- drawSquare(painter, x * squareWidth(), y * squareHeight(),
- nextPiece.shape());
- }
- nextPieceLabel->setPixmap(pixmap);
-//! [32] //! [33]
-}
-//! [33]
-
-//! [34]
-bool TetrixBoard::tryMove(const TetrixPiece &newPiece, int newX, int newY)
-{
- for (int i = 0; i < 4; ++i) {
- int x = newX + newPiece.x(i);
- int y = newY - newPiece.y(i);
- if (x < 0 || x >= BoardWidth || y < 0 || y >= BoardHeight)
- return false;
- if (shapeAt(x, y) != NoShape)
- return false;
- }
-//! [34]
-
-//! [35]
- curPiece = newPiece;
- curX = newX;
- curY = newY;
- update();
- return true;
-}
-//! [35]
-
-//! [36]
-void TetrixBoard::drawSquare(QPainter &painter, int x, int y, TetrixShape shape)
-{
- static constexpr QRgb colorTable[8] = {
- 0x000000, 0xCC6666, 0x66CC66, 0x6666CC,
- 0xCCCC66, 0xCC66CC, 0x66CCCC, 0xDAAA00
- };
-
- QColor color = colorTable[int(shape)];
- painter.fillRect(x + 1, y + 1, squareWidth() - 2, squareHeight() - 2,
- color);
-
- painter.setPen(color.lighter());
- painter.drawLine(x, y + squareHeight() - 1, x, y);
- painter.drawLine(x, y, x + squareWidth() - 1, y);
-
- painter.setPen(color.darker());
- painter.drawLine(x + 1, y + squareHeight() - 1,
- x + squareWidth() - 1, y + squareHeight() - 1);
- painter.drawLine(x + squareWidth() - 1, y + squareHeight() - 1,
- x + squareWidth() - 1, y + 1);
-}
-//! [36]