QT--吃月亮小游戏

QT--吃月亮小游戏

简介：

• 该设计使用了鼠标事件、键盘事件、绘图事件，可通过鼠标或者方向键控制人物移动吃到月亮

代码：

1.widget.h文件：

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QPaintEvent>  //绘图事件
#include <QMouseEvent>   //鼠标
#include <QPoint>
#include <QKeyEvent>   //键盘
#include <QPainter>
#include <QList>
#include <QLineEdit>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = nullptr);
    ~Widget();

public:
    int random_x;                             //保存月亮随机坐标
    int random_y;
    int direction;                            //保存键盘事件
    int Score = ;                            //得分
    QString Score_data;                       //保存得分

    bool meet = false;
    QPainter *painter;
    QLineEdit *line;

    void Wall_x(int &);
    void Wall_y(int &);                       //遇见墙壁
    void meet_s();                            //遇到月亮，重画月亮
    int Xrandom();                            //产生随机数
    int Yrandom();                            //产生随机数
    void Direction();                         //控制人物改变方向

    void paintEvent(QPaintEvent *event);      //绘图
    void mousePressEvent(QMouseEvent *event); //鼠标点击
    void mouseMoveEvent(QMouseEvent *event);  //鼠标拖动
    void keyPressEvent(QKeyEvent *event);     //键盘事件
private:
    QPoint point;

private:
    Ui::Widget *ui;
};

#endif // WIDGET_H

2.widget.cpp文件：

#include "widget.h"
#include "ui_widget.h"
#include <QDebug>
#include <QPainter>  //绘图画家
#include <QTime>
#include <QMutableListIterator>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    this->setMinimumSize(,);   //窗口大小

    point.setX(this->width()/);                    //初始化人物 在窗口中央
    point.setY(this->width()/);

    random_x = Xrandom();                          //初始化月亮
    random_y = Yrandom();

}

void Widget::mousePressEvent(QMouseEvent *event)  //鼠标点击
{
    qDebug() << event->pos() ;
    point = event->pos();
    update();
}

void Widget:: mouseMoveEvent(QMouseEvent *event)  //鼠标拖动
{
    qDebug() <<event->pos();
    point = event->pos();
    update();
}

void Widget::Wall_x(int &x)       //遇见墙壁
{
    if(x <= )
    {
        x += ;         //遇见就弹回
        Score -= ;
    }
    else if (x >= this->width()-)
    {
        x -= ;
        Score -= ;
    }
}
void Widget::Wall_y(int &y)      //遇见墙壁
{
    if(y <= )
    {
        y += ;
        Score -= ;
    }
    else if (y >= this->height()-)
    {
        y -= ;
        Score -= ;
    }
}
void Widget::keyPressEvent(QKeyEvent *event)  //键盘事件，控制人物移动
{
    int x = point.x();
    int y = point.y();
    qDebug() << event->key() ;
    direction = event->key();
    switch(event->key())
    {
        case Qt::Key_Up:     //上
            qDebug() <<"上";
            y -= ;
            Wall_y(y);
            break;
        case Qt::Key_Down:   //下
            qDebug() <<"下";
            y += ;
            Wall_y(y);
            break;
        case Qt::Key_Left:   //左
            qDebug() <<"左";
             x -= ;
             Wall_x(x);
            break;
        case Qt::Key_Right:  //右
            qDebug() <<"右";
             x += ;
             Wall_x(x);
            break;

        default :
             break;
    }
    point.setX(x) ;
    point.setY(y);

    qDebug() <<x <<":" <<y;
}

int Widget::Xrandom()                    //产生随机数
{
    int random_q;
    QTime time;
    time= QTime::currentTime();
    qsrand(time.msec()+time.second()*);

    random_q = qrand() % (this->width()-);
    if(random_q < )
        random_q += ;
    return random_q;
}
int Widget::Yrandom()                    //产生随机数
{
    int random_q;
    QTime time;
    time= QTime::currentTime();
    qsrand(time.msec()+time.second()*);

    random_q = qrand() % (this->height()-);
    if(random_q < )
        random_q += ;
    return random_q;
}

void Widget::meet_s()    //遇到月亮
{

    if((point.x()-random_x <  && point.x()-random_x > -)&& (point.y() - random_y <  &&point.y() - random_y > -) )
        meet = true;
    if(!meet)
    {
        /*  豆豆  */
        QRectF target_Peas(random_x,random_y, , );
        QRectF source_Peas(,, ,);
        QPixmap pixmap_Peas(":/new/prefix1/peas3.jpg");         //此处使用自己添加的资源文件夹内的图片
        painter->drawPixmap(target_Peas, pixmap_Peas, source_Peas);
    }
    else
    {
        qDebug() <<"遇见";
        random_x = Xrandom();
        random_y = Yrandom();
        Score++;
        meet = false;
    }
}

void Widget::Direction()          //控制人物改变方向
{
    QRectF target(-,-, 40.0, 40.0);
    QRectF source(0.0, 0.0, 400.0, 400.0);
    QPixmap pixmap_right(":/new/prefix1/character_right.jpg");        //此处使用自己添加的资源文件夹内的图片
    QPixmap pixmap1_left(":/new/prefix1/character_left.jpg");         //人物向左移动是的图片

    if(Qt::Key_Up == direction)                              //上
    {
         painter->rotate(-);
         painter->drawPixmap(target, pixmap_right, source);
    }

    else if(Qt::Key_Down == direction)                      //下
    {
         painter->rotate();
         painter->drawPixmap(target, pixmap_right, source);
    }
    else if(Qt::Key_Left == direction)                      //左
    {
         painter->drawPixmap(target, pixmap1_left, source);
    }
    else                                                    //右
    {
        painter->drawPixmap(target, pixmap_right, source);
    }
}
void Widget::paintEvent(QPaintEvent *event)
{
    painter = new QPainter(this);

    /*  画笔    */
    QPen pen (Qt::red,);
    QPen pen1 (Qt::green,);
    painter->setPen(pen1);

    /*  边框  */
    QRectF rectangle(, ,this->width(),this->width());
    QRectF rectangle1(, , this->width()-, this->height()-);

    /*  背景  */
    QRectF target(,, this->width(), this->width());
    QRectF source(,, this->width(), this->width());
    QPixmap pixmap_background(":/new/prefix1/background.jpg");
    painter->drawPixmap(target, pixmap_background, source);

    painter->setRenderHint(QPainter::Antialiasing,true);  //抗锯齿

    /*  画边框  */
    painter->drawRect(rectangle);
    painter->drawRect(rectangle1);

    /*  得分  */
    Score_data = "得分：" + QString::number(Score);
    painter->drawText(,,,,Qt::AlignCenter,Score_data);
    painter->setPen(pen);

    meet_s();                                         //绘制月亮
    painter->translate(point.x()+,point.y()+);    //移动画家

    Direction();                                      //画人物
    update();                                         //必须要刷新

}

Widget::~Widget()
{
    delete ui;
}

3.运行效果图：