QT射击小游戏

#include "cannon.h" #include <QPainter> #include <QPalette> #include <QFrame> #include <QGridLayout> #include <QPixmap> #include <QPaintEvent> #include <math.h> #include <QDateTime> #include <stdlib.h> CannonField::CannonField(QWidget *parent, const char *name) :QWidget(parent,name) { //QPalette palette; //QPixmap pixmap(":/6.png"); //palette.setBrush(QPalette::Background,QBrush(pixmap)); //this->setPalette(palette); gameEnded = false; newTarget(); ang=45; f=0; timerCount=0; autoShootTimer = new QTimer(this,"movement handler"); connect(autoShootTimer,SIGNAL(timeout()),this,SLOT(moveShot())); shoot_ang=0; shoot_f=0; //setPalette(QPalette(QColor(250,250,200))); /*QFrame *frame = new QFrame; QPixmap pixmap(":/6.png"); QPalette palette; palette.setBrush(frame->backgroundRole(),QBrush(pixmap)); frame->setPalette(palette); //frame->setMask(pixmap.mask()); //可以将图片中透明部分显示为透明的 //frame->setAutoFillBackground(true); //frame->show(); QGridLayout *glayout; glayout = new QGridLayout; glayout->addWidget(frame);*/ } void CannonField::newTarget() { static bool first_time = true; if(first_time) { first_time=false; QTime midnight(0,0,0); srand(midnight.secsTo(QTime::currentTime())); } QRegion r(targetRect()); target = QPoint(200+rand()%190,35+rand()%255); repaint(r.unite(targetRect())); } void CannonField::shoot() { if(isShooting()) return; //if(autoShootTimer->isActive()) //return; timerCount=0; shoot_ang=ang; shoot_f=f; autoShootTimer->start(50); emit canShoot(FALSE); } void CannonField::setGameOver() { if(gameEnded) return; if(isShooting()) autoShootTimer->stop(); gameEnded=true; repaint(); } void CannonField::restartGame() { if(isShooting()) autoShootTimer->stop(); gameEnded=false; repaint(); emit canShoot(TRUE); } void CannonField::moveShot() { QRegion r(shotRect()); timerCount++; QRect shotR=shotRect(); if(shotR.intersects(targetRect())) { autoShootTimer->stop(); emit hit(); emit canShoot(TRUE); } else if(shotR.x()>width()||shotR.y()>height()) { autoShootTimer->stop(); emit missed(); emit canShoot(TRUE); } else r=r.unite(QRegion(shotR)); repaint(r); } void CannonField::setAngle(int degrees) { if(degrees<5) degrees=5; else if(degrees>70) degrees=70; if(ang==degrees) return; ang=degrees; repaint(cannonRect(),FALSE);//FALSE参数说明在一个绘画事件发送到窗口部件之前指定的矩形将不会被擦去 emit angleChanged(ang); } void CannonField::setForce(int newton) { if(newton<0) newton=0; if(f==newton) return; f=newton; emit forceChanged(f); } void CannonField::paintEvent(QPaintEvent *e) { QRect updateR = e->rect(); QPainter p(this); if(gameEnded) { p.setPen(Qt::black); p.setFont(QFont("Courier",48,QFont::Bold)); p.drawText(rect(),Qt::AlignCenter,"Game Over!"); } if(updateR.intersects(cannonRect())) paintCannon(&p); if(autoShootTimer->isActive()&&updateR.intersects(shotRect())) paintShot(&p); if(updateR.intersects(targetRect())) paintTarget(&p); /* if(!e->rect().intersects(cannonRect())) return; QRect cr = cannonRect(); QPixmap pix(cr.size()); pix.fill(this,cr.topLeft()); QPainter p(&pix); p.translate(0,pix.height()-1); //QString s="Angle = " + QString ::number(ang); //QPainter p(this); //p.drawText(200,200,s); p.setBrush(Qt::blue); p.setPen(Qt::NoPen); //p.translate(0,rect().bottom()); p.drawPie(QRect(-35,-35,70,70),0,90*16); p.rotate(-ang); p.drawRect(QRect(33,-4,15,8)); p.end(); p.begin(this); p.drawPixmap(cr.topLeft(),pix); */ } void CannonField::paintTarget(QPainter *p) { p->setBrush(Qt::red); p->setPen(Qt::black); p->drawRect(targetRect()); } QRect CannonField::targetRect() const { QRect r(0,0,20,10); r.moveCenter(QPoint(target.x(),height()-1-target.y())); return r; } const QRect barrelRect(33,-4,15,8); void CannonField::paintCannon(QPainter *p) { //if(!p->rect().intersects(cannonRect())) //return; QRect cr = cannonRect(); QPixmap pix(cr.size()); pix.fill(this,cr.topLeft()); QPainter tmp(&pix); tmp.translate(0,pix.height()-1); tmp.setBrush(Qt::blue); tmp.setPen(Qt::NoPen); tmp.drawPie(QRect(-35,-35,70,70),0,90*16); //tmp.drawPie(0,0,35,35,0,16*90); tmp.rotate(-ang); tmp.drawRect(QRect(33,-4,15,8)); tmp.end(); //tmp->begin(this); p->drawPixmap(cr.topLeft(),pix); } void CannonField::paintShot(QPainter *p) { p->setBrush(Qt::black); p->setPen(Qt::NoPen); p->drawRect(shotRect()); } QRect CannonField::shotRect() const { const double gravity=2.0; const double PI=acos(-1); double time = timerCount/4.0; double velocity = shoot_f+10; double radians = shoot_ang*PI/180.0; double velx = velocity*cos(radians); double vely = velocity*sin(radians)-0.5*gravity*time*time; double x0 = (barrelRect.right()+5)*cos(radians); double y0 = (barrelRect.right()+5)*sin(radians); double x = x0+velx*time; double y = y0+vely*time; QRect r = QRect(0,0,6,6); r.moveCenter(QPoint(qRound(x),height()-1-qRound(y))); return r; } QRect CannonField::cannonRect() const { QRect r(0,0,50,50); r.moveBottomLeft(rect().bottomLeft()); return r; } QSizePolicy CannonField::sizePolicy() const { return QSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding); }