Qt之任务栏系统托盘图标

托盘图标，一个自己脑子出现很久的词，可惜自己都没动手去实现。最近看见的，听见的多了，自己也感兴趣就弄弄了，感觉还蛮简单了。

贴出效果图：

Qt之任务栏系统托盘图标

那么多功能，其实就一个类就搞定了，那就是QSystemTrayIcon

头文件（主要 1.声明菜单相关动作 2.声明系统托盘对象，以及相关托盘槽函数 3.关闭事件）

#ifndef SYSTEMTRAYICON_H
#define SYSTEMTRAYICON_H

#include <QMainWindow>
#include <QMenu>
#include <QSystemTrayIcon>
#include <QCloseEvent>
namespace Ui {
    class SystemTrayIcon;
}

class SystemTrayIcon : public QMainWindow
{
    Q_OBJECT

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

    void CreatTrayMenu();
    void CreatTrayIcon();

    QSystemTrayIcon *myTrayIcon;

    QMenu *myMenu;

    QAction *miniSizeAction;
    QAction *maxSizeAction;
    QAction *restoreWinAction;
    QAction *quitAction;

private:
    Ui::SystemTrayIcon *ui;

public slots:
    void iconActivated(QSystemTrayIcon::ActivationReason reason);

protected:
    void closeEvent(QCloseEvent *event);

};

#endif // SYSTEMTRAYICON_H

源文件（1.创建上下文菜单 2.创建系统托盘，实现相关功能）

#include "SystemTrayIcon.h"
#include "ui_SystemTrayIcon.h"
#include <QSystemTrayIcon>
SystemTrayIcon::SystemTrayIcon(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::SystemTrayIcon)
{
    ui->setupUi(this);

    CreatTrayIcon();
}

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

void SystemTrayIcon::CreatTrayMenu()
{
    miniSizeAction = new QAction("最小化(&N)",this);
    maxSizeAction = new QAction("最大化(&X)",this);
    restoreWinAction = new QAction("还 原(&R)",this);
    quitAction = new QAction("退出(&Q)",this);

    this->connect(miniSizeAction,SIGNAL(triggered()),this,SLOT(hide()));
    this->connect(maxSizeAction,SIGNAL(triggered()),this,SLOT(showMaximized()));
    this->connect(restoreWinAction,SIGNAL(triggered()),this,SLOT(showNormal()));
    this->connect(quitAction,SIGNAL(triggered()),qApp,SLOT(quit()));

    myMenu = new QMenu((QWidget*)QApplication::desktop());

    myMenu->addAction(miniSizeAction);
    myMenu->addAction(maxSizeAction);
    myMenu->addAction(restoreWinAction);
    myMenu->addSeparator();     //加入一个分离符
    myMenu->addAction(quitAction);
}

void SystemTrayIcon::CreatTrayIcon()
{
    CreatTrayMenu();

    if (!QSystemTrayIcon::isSystemTrayAvailable())      //判断系统是否支持系统托盘图标
    {
        return;
    }

    myTrayIcon = new QSystemTrayIcon(this);

    myTrayIcon->setIcon(QIcon("mytrayIcon.ico"));   //设置图标图片
    setWindowIcon(QIcon("mytrayIcon.ico"));  //把图片设置到窗口上

    myTrayIcon->setToolTip("SystemTrayIcon V1.0");    //托盘时，鼠标放上去的提示信息

    myTrayIcon->showMessage("SystemTrayIcon","Hi,This is my trayIcon",QSystemTrayIcon::Information,10000);



    myTrayIcon->setContextMenu(myMenu);     //设置托盘上下文菜单

    myTrayIcon->show();
    this->connect(myTrayIcon,SIGNAL(activated(QSystemTrayIcon::ActivationReason)),this,SLOT(iconActivated(QSystemTrayIcon::ActivationReason)));
}

void SystemTrayIcon::iconActivated(QSystemTrayIcon::ActivationReason reason)
{
    switch(reason)
    {
    case QSystemTrayIcon::Trigger:

    case QSystemTrayIcon::DoubleClick:
        showNormal();
        break;
    case QSystemTrayIcon::MiddleClick:
        myTrayIcon->showMessage("SystemTrayIcon","Hi,This is my trayIcon",QSystemTrayIcon::Information,10000);
        break;

    default:
        break;
    }
}

void SystemTrayIcon::closeEvent(QCloseEvent *event)
{
    if (myTrayIcon->isVisible())
    {
        myTrayIcon->showMessage("SystemTrayIcon","Hi,This is my trayIcon",QSystemTrayIcon::Information,5000);

        hide();     //最小化
        event->ignore();
    }
    else
        event->accept();
}

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Qt之任务栏系统托盘图标

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