piecebox.cpp

#include "piecebox.h"
#include "enumHeader.h"
#include <QList>
#include <QDebug>

QColor pieceBox::colorTable[7] = {QColor(200,0,0,100),QColor(255,200,0,100),
								 QColor(0,0,200,100),QColor(0,200,0,100),
								 QColor(0,200,255,100),QColor(200,0,255,100),
								 QColor(150,100,100,100)};

#define PIECE_DIAMETER 20
#define PEN_WIDTH 0

pieceBox::pieceBox()
{
	m_pieceBoxList.clear();
	//使得方块组支持键盘操作
	setFlags(QGraphicsItem::ItemIsFocusable);
	//保存矩阵的原状态，使得可以还原矩阵
	m_oldTransform = transform();
	m_Timer = new QTimer(this);
	connect(m_Timer,SIGNAL(timeout()),this,SLOT(slot_moveOneStep()));
	m_currentBoxType = RandomShape;
}

//绘制方块组的边框矩形
QRectF pieceBox::boundingRect() const
{
	qreal penWidth = PEN_WIDTH;
	return QRectF(-(PIECE_DIAMETER*2 - penWidth) / 2, -(PIECE_DIAMETER*2 - penWidth) / 2,
				  PIECE_DIAMETER*4-penWidth, PIECE_DIAMETER*4-penWidth);
}

bool pieceBox::isCollding() const
{
	//依次检测方块组中的每个方块的碰撞
	foreach (onePiece *piece, m_pieceBoxList) {
//        qDebug() << "colliding number:" << piece->collidingItems().count();
		//获取与该方块碰撞的方块的个数
		if(piece->collidingItems().count() > 1)
		{
			return true;
		}
	}
	return false;
}

BoxType pieceBox::getCurrentBoxType() const
{
	return m_currentBoxType;
}

void pieceBox::createBox(const QPointF &point, BoxType currentBoxType)
{
	int boxType = currentBoxType;
	if(boxType == RandomShape)
	{
		boxType = qrand() % 7;
	}
	//设置该方块组的颜色
	QColor boxColor = colorTable[boxType];
	//准备四个小方块

	//恢复方块组的变换矩阵，因为之前的方块组的变换会导致变换矩阵的位置发生变换,
	//防止新的方块组因为旧的方块组变换异常
	setTransform(m_oldTransform);
	setRotation(0);
	resetTransform();

	m_pieceBoxList.clear();
	for(int i = 0;i < 4;i++)
	{
		onePiece *piece = new onePiece(boxColor);
		m_pieceBoxList.append(piece);
		//将小方块添加到方块组中
		addToGroup(piece);
	}
	//设置方块组的形状
	switch (boxType) {
	case IShape:
		m_currentBoxType = IShape;
		m_pieceBoxList.at(0)->setPos(-30,-10);
		m_pieceBoxList.at(1)->setPos(-10,-10);
		m_pieceBoxList.at(2)->setPos(10,-10);
		m_pieceBoxList.at(3)->setPos(30,-10);
		break;
	case JShape:
		m_currentBoxType = JShape;
		m_pieceBoxList.at(0)->setPos(10,-10);
		m_pieceBoxList.at(1)->setPos(10,10);
		m_pieceBoxList.at(2)->setPos(10,30);
		m_pieceBoxList.at(3)->setPos(-10,30);
		break;
	case LShape:
		m_currentBoxType = LShape;
		m_pieceBoxList.at(0)->setPos(-10,-10);
		m_pieceBoxList.at(1)->setPos(-10,10);
		m_pieceBoxList.at(2)->setPos(10,30);
		m_pieceBoxList.at(3)->setPos(-10,30);
		break;
	case OShape:
		m_currentBoxType = OShape;
		 m_pieceBoxList.at(0)->setPos(-10,-10);
		 m_pieceBoxList.at(1)->setPos(10,-10);
		 m_pieceBoxList.at(2)->setPos(-10,10);
		 m_pieceBoxList.at(3)->setPos(10,10);
		break;
	case SShape:
		m_currentBoxType = SShape;
		 m_pieceBoxList.at(0)->setPos(30,-10);
		 m_pieceBoxList.at(1)->setPos(10,-10);
		 m_pieceBoxList.at(2)->setPos(10,10);
		 m_pieceBoxList.at(3)->setPos(-10,10);
		break;
	case TShape:
		m_currentBoxType = TShape;
		 m_pieceBoxList.at(0)->setPos(-10,-10);
		 m_pieceBoxList.at(1)->setPos(10,-10);
		 m_pieceBoxList.at(2)->setPos(30,-10);
		 m_pieceBoxList.at(3)->setPos(10,10);
		break;
	case ZShape:
		m_currentBoxType = ZShape;
		 m_pieceBoxList.at(0)->setPos(-10,-10);
		 m_pieceBoxList.at(1)->setPos(10,-10);
		 m_pieceBoxList.at(2)->setPos(10,10);
		 m_pieceBoxList.at(3)->setPos(30,10);
		break;
	default:
		break;
	}
	//设置方块组的位置
	setPos(point);
	//检测是否发生碰撞,发生碰撞，游戏结束
	if(isCollding())
	{
		slot_stopTimer();
		emit signal_gameOver();
	}
}

//删除方块组中的小方块到情景中
void pieceBox::clearBoxGroup(const bool &isClear)
{
	QList<QGraphicsItem *> itemList = childItems();
	foreach (QGraphicsItem *piece, itemList) {
		removeFromGroup(piece);
//        qDebug() << "clear box group" << isClear;
		if(isClear)
		{
			//销毁小方块
		   ((onePiece *)piece)->deleteLater();
		}
	}
	m_pieceBoxList.clear();
}

void pieceBox::keyPressEvent(QKeyEvent *event)
{
	switch (event->key()) {
	case Qt::Key_Down:
		moveBy(0,20);
		//检测是否碰撞
		if(isCollding())
		{
		   moveBy(0,-20);
		   clearBoxGroup();
		   //需要新的方块
		   emit signal_needNewBox();
		}
		break;
	case Qt::Key_Left:
		moveBy(-20,0);
		if(isCollding())
		{
			moveBy(20,0);
		}

		break;
	case Qt::Key_Right:
		moveBy(20,0);
		if(isCollding())
		{
			moveBy(-20,0);
		}
		break;
	case Qt::Key_Up:
		setRotation(rotation()+90);
		if(isCollding())
		{
			setRotation(rotation()-90);
		}
		break;
	case Qt::Key_Space: //快速下落
		moveBy(0,20);
		while (!isCollding()) {
			moveBy(0,20);
		}
		moveBy(0,-20);
		clearBoxGroup();
		//需要新的方块
		emit signal_needNewBox();
		break;
	default:
		break;
	}
}

void pieceBox::slot_moveOneStep()
{
	moveBy(0,20);
//    qDebug() << "move one step";
	if(isCollding())
	{
		moveBy(0,-20);
		// 将小方块从方块组中移除到场景中
		clearBoxGroup();
		//需要新的方块
		emit signal_needNewBox();
	}
}

void pieceBox::slot_startTimer(int timeSec)
{
	m_Timer->start(timeSec);
}

void pieceBox::slot_stopTimer()
{
	m_Timer->stop();
}