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#include <QtGui>
#include "tetrixboard.h"
//! [0]
TetrixBoard::TetrixBoard(QWidget *parent)
: QFrame(parent)
{
setFrameStyle(QFrame::Panel | QFrame::Sunken);
setFocusPolicy(Qt::StrongFocus);
isStarted = false;
isPaused = false;
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().background());
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 const 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.light());
painter.drawLine(x, y + squareHeight() - 1, x, y);
painter.drawLine(x, y, x + squareWidth() - 1, y);
painter.setPen(color.dark());
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]