QT 抽屉式滑出菜单栏的实现

这是最终的效果

头文件：
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QPropertyAnimation>
QT_BEGIN_NAMESPACE
namespace Ui {
    class Widget; }
QT_END_NAMESPACE
class Widget : public QWidget
{
   
    Q_OBJECT
public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
protected:
    virtual void paintEvent(QPaintEvent *event) override;
    virtual void mouseMoveEvent(QMouseEvent *event) override;
    virtual void mousePressEvent(QMouseEvent *event) override;
    virtual void mouseReleaseEvent(QMouseEvent *event) override;
    virtual void resizeEvent(QResizeEvent *event);
private:
    void showMenu();
    void hideMenu();
private:
    Ui::Widget *ui;
    bool mIsHoveringOnCloseButton;
    bool mIsHoveringOnMenuButton;
    bool mIsPressed;
    QPointF mPressedPos;
    QWidget* mMenu;
    QPropertyAnimation * mMenuAnim;
};
#endif // WIDGET_H

CPP文件
#include "Widget.h"
#include "ui_Widget.h"
#include <QPaintEvent>
#include <QPainter>
#include <QDebug>
#include <QVBoxLayout>
#include <QLabel>
#define UpdateAccept \
{
     update();event->accept();return;}
Widget::Widget(QWidget *parent)