【QT开发】乒乓球碰撞反弹demo

在编写代码时，无意弄出来了一个这个东西，觉得挺有意思的记录一下，类似乒乓球在矩形内一直运动碰撞反弹demo

头文件

#ifndef MYPROJECT_H
#define MYPROJECT_H

#include <QMainWindow>
#include <QPainter>
#include "form.h"

QT_BEGIN_NAMESPACE
namespace Ui { class MyProject; }
QT_END_NAMESPACE

class MyProject : public QMainWindow
{
    Q_OBJECT

public:
    MyProject(QWidget *parent = nullptr);
    ~MyProject();



    Form *m_form;

public:
    QTimer *timer;

    int m_x;
    int m_y;
    int m_type_x;
    int m_type_y;

private slots:
    void updateProgressBar();

    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void on_pushButton_3_clicked();

private:
    Ui::MyProject *ui;
};
#endif // MYPROJECT_H

#include "myproject.h"
#include "ui_myproject.h"
#include <QDebug>

MyProject::MyProject(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MyProject)
    ,m_y(1)
    ,m_x(1)
    ,m_type_x(0)
    ,m_type_y(0)
{
    ui->setupUi(this);






    // 初始化定时器
    timer = new QTimer(this);
    connect(timer, &QTimer::timeout, this, &MyProject::updateProgressBar);

    timer->setInterval(100);
 
    timer->start();

    ui->label->setGeometry(th