Qt4.8.2 加农炮小游戏 cannon 源码 和exe文件

#include "cannonwidget.h" #include <QPalette> //调色板 设置背景颜色 #include <QMouseEvent> #include <QTimer> #include <QPainter> #include <QPaintEvent> #include <QPixmap> #include <math.h> #include <QDateTime> #include <stdlib.h> cannonWidget::cannonWidget(QWidget *parent) : QWidget(parent) { setFixedSize(500,395); setAutoFillBackground(true); skinChanged("spring.png"); angle=45; force=10; gravity=9.8; shotTimerCount=0; setMouseTracking(true);//开启鼠标追踪，否则只有在按下鼠标的时候 才能追踪 timerForce=new QTimer(this); QObject::connect(timerForce,SIGNAL(timeout()),this,SLOT(addForce())); autoShotTimer=new QTimer(this); QObject::connect(autoShotTimer,SIGNAL(timeout()),this,SLOT(moveShot())); QTime midNight(0,0,0); srand(midNight.secsTo(QTime::currentTime()));//种下随机时间种子 targetPoint=QPoint(50+rand()%400,10+rand()%350); QObject::connect(this,SIGNAL(hit()),this,SLOT(newTarget())); } //public slot 改变背景颜色 void cannonWidget::skinChanged(QString picName) { QPalette palette; palette.setBrush(QPalette::Background,QBrush(QPixmap(":/img/big_"+picName))); setPalette(palette); } //private slot 移动子弹 void cannonWidget::moveShot() { QRegion r(shotRect()); shotTimerCount++; QRect rect=shotRect(); if(rect.intersects(targetRect())) { autoShotTimer->stop(); emit hit(); force=10; emit forceChanged(force); } else if(rect.y()<=0 ||rect.y()>height() || rect.x()>width()) { autoShotTimer->stop(); force=10; emit forceChanged(force); emit missed(); } else { r=r.united(rect); } repaint(r); } void cannonWidget::mouseMoveEvent(QMouseEvent *event) { if(autoShotTimer->isActive()) return; double anglePiece=75*1.0/rect().width(); //5-80 总共85个角度 算出每个x坐标对应的角度 double angleTemp=anglePiece*event->x(); double ang=80-(int)angleTemp; if(ang<5) ang=5; if(ang>80) ang=80; if(angle!=ang)//防止当按下鼠标并一直拖动后，angle已被限制，却仍然发送信号 { angle=ang; emit angleChanged(angle); repaint(cannonRect()); } } void cannonWidget::mousePressEvent(QMouseEvent *event) { if(autoShotTimer->isActive()) return; if(event->button()&Qt::LeftButton) { timerForce->start(20); } } void cannonWidget::mouseReleaseEvent(QMouseEvent *) { if(timerForce->isActive()) { timerForce->stop(); shotTimerCount=0; //发射子弹 autoShotTimer->start(20); } } void cannonWidget::paintEvent(QPaintEvent *event) { QRect updateRect=event->rect(); QPainter p(this); if(updateRect.intersects(cannonRect())) paintCannon(&p); if(autoShotTimer->isActive() && updateRect.intersects(shotRect())) paintShot(&p); if(updateRect.intersects(targetRect())) paintTarget(&p); } //public slot void cannonWidget::newTarget() { QRegion r(targetRect()); targetPoint=QPoint(50+rand()%400,10+rand()%350); repaint(r.united(targetRect())); } //private slot void cannonWidget::addForce() { force++; if(force>99) force=10; emit forceChanged(force); } //rect 加农炮 QRect cannonWidget::cannonRect() const { QRect cannon(0,0,50,50); cannon.moveBottomLeft(rect().bottomLeft()); return cannon; } //QRect 子弹 QRect cannonWidget::shotRect() const { double time=shotTimerCount*50.0/1000;//把时间转化为秒 double radians=angle*3.1415926/180; double velX=force*cos(radians);//水平速度 double velY=force*sin(radians);//垂直速度 double x0=(35+13)*cos(radians);//炮筒口的x坐标 double y0=(35+13)*sin(radians);//炮筒口的y坐标 double x=x0+velX*time; double y=y0+velY*time-0.5*gravity*time*time; QRect shotR(0,0,6,6); shotR.moveCenter(QPoint(qRound(x),height()-qRound(y)-1)); return shotR; } //QRect 目标 QRect cannonWidget::targetRect() const { QRect rect(0,0,20,10); rect.moveCenter(targetPoint); return rect; } void cannonWidget::paintCannon(QPainter *p) { QRect cannon=cannonRect(); QPixmap pixmap(cannon.size()); pixmap.fill(this,cannon.topLeft()); QPainter painter(&pixmap); painter.setRenderHint(QPainter::Antialiasing,true);//抗锯齿 painter.setBrush(QBrush(QColor(178,34,34))); painter.setPen(Qt::NoPen); painter.translate(0,pixmap.height());//移动坐标系顶点 painter.drawPie(QRect(-35,-35,70,70),0*16,90*16); painter.rotate(-angle); painter.drawRect(QRect(33,-4,15,8)); painter.end(); p->drawPixmap(cannon.topLeft(),pixmap); } void cannonWidget::paintShot(QPainter *p) { p->setRenderHint(QPainter::Antialiasing,true); p->setBrush(QBrush(QColor(255,0,0))); p->setPen(Qt::NoPen); p->drawEllipse(shotRect()); } void cannonWidget::paintTarget(QPainter *p) { p->setBrush(Qt::green); p->setPen(Qt::NoPen); p->setRenderHint(QPainter::Antialiasing,true); p->drawRect(targetRect()); }