Qt-QSystemTrayIcon实现系统托盘

相关资料：

https://blog.csdn.net/u011417605/article/details/51322997

.pro

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += 
    main.cpp 
    mainwindow.cpp

HEADERS += 
    mainwindow.h

FORMS += 
    mainwindow.ui

LIBS += -lUser32  // 这个window的引用


# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

RESOURCES += 
    QtSystemTrayIcon.qrc

main.cpp

#include "mainwindow.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <Windows.h>

#include <QMainWindow>
#include <QSystemTrayIcon>
#include <QMenu>
#include <QAction>
#include <QDebug>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

    virtual void changeEvent(QEvent *event);
private:
    void activeTray(QSystemTrayIcon::ActivationReason reason);

    void showWindow();//显示窗体
    void showMessage();//消息框
    void showMenu();//显示菜单
private:
    Ui::MainWindow *ui;

    QSystemTrayIcon *m_systemTray;
    QMenu *m_menu;
    QAction *m_action1;
    QAction *m_action2;
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);    
    // 菜单的建立
    m_menu = new QMenu(this);
    m_action1 = new QAction(m_menu);
    m_action2 = new QAction(m_menu);
    m_action1->setText("Show Window");
    m_action2->setText("Show Message");
    m_menu->addAction(m_action1);
    m_menu->addAction(m_action2);
    connect(m_action1, &QAction::triggered, this, &MainWindow::showWindow);
    connect(m_action2, &QAction::triggered, this, &MainWindow::showMessage);
    // 托盘的建立
    m_systemTray = new QSystemTrayIcon(this);
    m_systemTray->setContextMenu(m_menu);
    m_systemTray->setIcon(QIcon(":/new/prefix1/ico.png"));
    m_systemTray->setToolTip("SystemTray Program");
    m_systemTray->show();
    connect(m_systemTray, &QSystemTrayIcon::activated, this, &MainWindow::activeTray);//点击托盘，执行相应的动作
    connect(m_systemTray, &QSystemTrayIcon::messageClicked, this, &MainWindow::showWindow);//点击消息框，显示主窗口
}

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

void MainWindow::changeEvent(QEvent *event)
{
    if(event->type() == QEvent::WindowStateChange)
    {
        if(windowState() & Qt::WindowMinimized)
        {
            hide();
        }
    }
    QWidget::changeEvent(event);
}

void MainWindow::activeTray(QSystemTrayIcon::ActivationReason reason)
{
    qDebug() << "activeTray:" << reason;
    switch (reason)
    {
    case QSystemTrayIcon::Context:
        showMenu();
        break;
//    case QSystemTrayIcon::DoubleClick:
//        showMessage();
//        break;
    case QSystemTrayIcon::Trigger:
        showWindow();
        break;
    }
}

void MainWindow::showWindow()
{
    Qt::WindowStates wins;
    if (windowState() & Qt::WindowMaximized)
    {
        wins = Qt::WindowMaximized;
    }
    setWindowState(Qt::WindowActive | wins);
    this->show();
}

void MainWindow::showMessage()
{
    m_systemTray->showMessage("Information",//消息窗口标题
    "There is a new message!",//消息内容
    QSystemTrayIcon::MessageIcon::Information,//消息窗口图标
    5000);//消息窗口显示时长
}

void MainWindow::showMenu()
{
    m_menu->show();
}

mainwindow.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>458</width>
    <height>132</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget"/>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>458</width>
     <height>23</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

resources  不再上传