1、概述
源码放在文章末尾

该项目基于QMenu实现了炫酷的菜单栏效果，包含了如下功能：
1、实现了类似word菜单栏的效果，可以在菜单栏中横向添加不同的菜单
2、鼠标点击菜单可以展开菜单栏，再次点击菜单可以收起菜单栏
3、鼠标点击笑脸可以切换菜单栏的背景颜色

项目demo演示如下所示：

使用方式：
1、创建菜单栏对象

MenuBarPlugin* menuPlugin = new MenuBar();

2、在QMainWindow上设置菜单栏

menuPlugin->SetMenuBar(this); //this为继承QMainWindow的界面指针

项目部分代码如下所示：

#pragma once#include <QMenuBar>
#include "ui_MenuWidget.h"
#include <QMouseEvent>
#include <QEvent>
#include <QTabWidget>
#include <QPaintEvent>class QMainWindow;
class QMouseEvent;
class QEvent;struct QRibbonPrivate;class MenuWidget : public QMenuBar
{Q_OBJECTpublic:MenuWidget(QWidget *parent = nullptr);~MenuWidget();public:void install(QMainWindow* window);void setColor(const QString& colorName);public:/*** 安装本实例至QMainWindow实例，* 自动根据QMainWindow的菜单栏创建Ribbon内容*/void initialize(QMainWindow* window);/*** 卸载* TBD*/void uninstall();void setStyleButtonVisible(bool visible);public slots:/*** 设置标题*/void setWindowTitle(const QString& title);/*** 切换全屏*/void toggleMaximized();private slots:/*** 展开标签页*/void expandTab();/*** 隐藏标签页*/void hideTab();/*** 隐藏标签页动画结束*/void onHideTabFinished();/*** 标签页变化*/void onTabChanged();/*** 失去焦点时*/void onLostFocus();/*** tab被点击*/void clickTab();public slots:void on_pushButtonMaxTab_clicked();void on_pushButtonMinTab_clicked();void showTabWidgetPage(QTabWidget* tabWidget);
protected:void mousePressEvent(QMouseEvent* event) override;void mouseMoveEvent(QMouseEvent* event) override;void mouseReleaseEvent(QMouseEvent* event) override;void mouseDoubleClickEvent(QMouseEvent* event) override;// bool eventFilter(QObject* tgt, QEvent* e) override;void paintEvent(QPaintEvent* event) override;private:void initStyle();void initWindowPage();
private:Ui::MenuWidgetClass ui;friend struct QRibbonPrivate;QRibbonPrivate* _ribbon;QMenu* _styleMenu;bool   m_bExpandStaus;bool isMaxWindow;
};

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