Wild road play QT, episode 31, glass cleaning game

https://live.csdn.net/v/199805

This example , Most simplified Qt The logic and ideas of developing small games ,

 Graphic elements --》 scene --》 View 

QGraphicsItem--》QGraphicsScene--》QGraphicsView

Graphic elements ： Little ant , Rag , Background image

Code ：

pro File to add ：

QT       += core gui multimedia

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QGraphicsItem>
#include <math.h>
#include <QGraphicsScene>
#include <QPainter>
#include <QStyleOption>
#include <QGraphicsRectItem>
#include <QGraphicsView>

#include <QDebug>
#include <QList>
#include <QTimer>

#include <QMediaPlayer>

#include <QMediaPlaylist>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();

    // Generate ants 
    void CreateMaYi();

    // Collision detection function 
    void Collison();


private:
    Ui::Widget *ui;

    QGraphicsView mGameView;// Game view 
    QGraphicsScene mScene;// Game scenario 
    QGraphicsPixmapItem mBackGround1;// Background image 1
    QGraphicsPixmapItem mMabu;// Rag 

    // Media playing background music 
    QMediaPlayer *player;
    QMediaPlaylist *playlist;


    // Timer 
    QTimer *mMaYiCreateTimer;// Ants generate timers 
    QTimer *mCollisonTimer;// collision detection 


    // Containers 
    QList<QGraphicsPixmapItem*> mMaYiList;// Ant container , Pretend there are ants 

};

#endif // WIDGET_H

widget.cpp:

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    // Graphic elements --》 scene --》 View 


    // Play background music 
    player=new QMediaPlayer;
    playlist = new QMediaPlaylist;
    playlist->setPlaybackMode(QMediaPlaylist::Loop);//  By setting   Playlist loop   Achieve loop play 

    playlist->addMedia(QUrl("qrc:/img/caboli.mp3"));
    player->setPlaylist(playlist);
    player->setVolume(100);
    player->play();


    this->setFixedSize(800,800);// Set the window size 

    mGameView.setSceneRect(QRect(0,0,800,800));// Set up the view , Rectangle size 
    mScene.setSceneRect(QRect(0,0,800,800));// Setting scene , Rectangle size 

    mBackGround1.setPixmap(QPixmap(":/img/img/boli.jpg"));// Set the background image 

    mMabu.setPixmap(QPixmap(":/img/img/mabu.png"));// Set up a rag 
    mMabu.setFlag(QGraphicsItem::ItemIsMovable);// Mouse drag support 
    mMabu.setPos(500,500);// Set the position of the rag 
    mMabu.setZValue(1);// Set the rag as the upper layer 

     // Add picture elements to the scene 
     mScene.addItem(&mBackGround1);// Add background image 1
     mScene.addItem(&mMabu);// Add a rag picture 

     // Set the view scene 
     mGameView.setScene(&mScene);

     // Set the parent of the view to window 
     mGameView.setParent(this);
     // Show view 
     mGameView.show();

    // Start the ant creation timer 
     mMaYiCreateTimer = new QTimer(this);
     mMaYiCreateTimer->start(2000);
    connect(mMaYiCreateTimer,&QTimer::timeout,this,&Widget::CreateMaYi);

    // Start the collision detection timer 
    mCollisonTimer = new QTimer(this);
    mCollisonTimer->start(100);
    connect(mCollisonTimer,&QTimer::timeout,this,&Widget::Collison);
}

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

void Widget::CreateMaYi()// Generate ants 
{
    QGraphicsPixmapItem *mMayi = new QGraphicsPixmapItem;// Ant 
    QPixmap pixmap(":/img/img/mayi.png");
    mMayi->setPixmap(pixmap);
    int randX = qrand()%(800-pixmap.width());// Randomly generated ant starting point X Location 
    int randY = qrand()%(800-pixmap.height());// Randomly generated ant starting point Y Location 
    mMayi->setPos(QPoint(randX,randY));

    // Add to scene 
    mScene.addItem(mMayi);

    // Add to manager 
    mMaYiList.append(mMayi);
}

void Widget::Collison()// Collision detection function 
{
    // Traverse the ant container 
    for(int i=0; i < mMaYiList.size(); i++ )
    {
            if(mMabu.collidesWithItem(mMaYiList[i]))
            {
                // Remove scene 
                mScene.removeItem(mMaYiList[i]);

                // Remove Manager 
                mMaYiList.removeOne(mMaYiList[i]);

                qDebug()<<" Collision ";
            }
    }
}

  Pictures of resources used ：