滑鼠樣式的效果如下：

主要思路：

重寫widget的MouseMoveEvent事件的處理函式。移動過程中的四個星星由四個定時器控制著，分別處於移動前位置A點和移動後的位置B點之間的四點上，然後從最小的星星到最大的星星分別在定時器事件中消失。

關於起點A和重點B的位置儲存問題，在mouseMoveEvent函式中，有pos()獲取到的座標是移動此刻的座標。

為了直白地表述這個過程，程式碼直接在widget的建構函式中完成，較少用到函式。程式碼如下：

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QEvent>
#include <QTimer>

namespace Ui {
class Widget;
}

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

protected:
    void mouseMoveEvent(QMouseEvent *);
    
private:
    Ui::Widget *ui;

    //四個星星
    QWidget *widget1;
    QWidget *widget2;
    QWidget *widget3;
    QWidget *widget4;

    //處理星星消失的四個定時器
    QTimer *timer1;
    QTimer *timer2;
    QTimer *timer3;
    QTimer *timer4;


    int x, y;  //滑鼠起點座標
    int mouse_x, mouse_y;  //移動後的座標

private slots:
    void time1();  //定時器事件槽
    void time2();
    void time3();
    void time4();

};

#endif // WIDGET_H
 

#include "widget.h"
#include "ui_widget.h"
#include <QPixmap>
#include <QLabel>


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

    //分別為四個星星宣告四個widget
    widget1 = new QWidget(this);
    widget1->setWindowFlags(Qt::FramelessWindowHint);
    widget1->resize(20, 20);
    widget1->setStyleSheet("border-image: url(:/Icons/love.png)");

    widget2 = new QWidget(this);
    widget2->setWindowFlags(Qt::FramelessWindowHint);
    widget2->resize(20, 20);
    widget2->setStyleSheet("border-image: url(:/Icons/love.png)");

    widget3 = new QWidget(this);
    widget3->setWindowFlags(Qt::FramelessWindowHint);
    widget3->resize(20, 20);
    widget3->setStyleSheet("border-image: url(:/Icons/love.png)");

    widget4 = new QWidget(this);
    widget4->setWindowFlags(Qt::FramelessWindowHint);
    widget4->resize(20, 20);
    widget4->setStyleSheet("border-image: url(:/Icons/love.png)");

    //定時器
    timer1 = new QTimer(this);
    timer2 = new QTimer(this);
    timer3 = new QTimer(this);
    timer4 = new QTimer(this);

    x = QCursor::pos().x();  //初始時滑鼠位置
    y = QCursor::pos().y();

    connect(timer1, SIGNAL(timeout()), this, SLOT(time1()));
    connect(timer2, SIGNAL(timeout()), this, SLOT(time2()));
    connect(timer3, SIGNAL(timeout()), this, SLOT(time3()));
    connect(timer4, SIGNAL(timeout()), this, SLOT(time4()));

    setMouseTracking(true);  //跟蹤滑鼠
}



void Widget::mouseMoveEvent(QMouseEvent *mouseMoveEvent)
{
    mouse_x = QCursor::pos().x();  //獲取移動後的滑鼠位置
    mouse_y = QCursor::pos().y();

    widget4->setGeometry(mouse_x + 20, mouse_y - 10, 50, 50);  //分別計算移動路徑上的分佈
    widget3->setGeometry(mouse_x + 20 + (x - mouse_x)/(3.0), mouse_y - 10 + (y - mouse_y)/(3.0), 40, 40);
    widget2->setGeometry(mouse_x + 20 + 2 * (x - mouse_x)/(3.0), mouse_y - 10 + 2 * (y - mouse_y)/(3.0), 30, 30);
    widget1->setGeometry(mouse_x + 20 + 3 * (x - mouse_x)/(3.0), mouse_y - 10 + 3 * (y - mouse_y)/(3.0), 20, 20);


    timer1->start(50);  //開始定時器，來處理星星消失
    timer2->start(100);
    timer3->start(150);
    timer4->start(200);

    widget4->show();
    widget3->show();
    widget2->show();
    widget1->show();
}

void Widget::time1()
{
    widget1->hide();
    timer1->stop();
}

void Widget::time2()
{
    widget2->hide();
    timer2->stop();
}

void Widget::time3()
{
    widget3->hide();
    timer3->stop();
}

void Widget::time4()
{
    widget4->hide();
    timer4->stop();
    x = mouse_x;
    y = mouse_y;
}

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