Qt-----托盘功能

1 添加两个成员变量

QSystemTrayIcon*trayicon;

QMenu*trayiconMenu;

2添加一个槽函数用于响应在托盘图标及托盘菜单上的鼠标点击操作

voidonSystemTrayIconClicked(QSystemTrayIcon::ActivationReasonreason);

3在构造函数中对添加的两个变量进行初始化

trayicon=newQSystemTrayIcon(this);

//创建QIcon对象，参数是图标资源，值为项目的资源文件中图标的地址

QIconicon("F:/WindowsQT/TrayIcon/bottom.png");

trayiconMenu=newQMenu(this);

//为托盘菜单添加菜单项

trayiconMenu->addAction(ui->action_quit);

//为托盘菜单添加分隔符

trayiconMenu->addSeparator();

//将创建的QIcon对象作为系统托盘图标

trayicon->setIcon(icon);

//显示托盘图标

trayicon->show();

//设置系统托盘提示

trayicon->setToolTip(tr("托盘测试"));

//将创建菜单作为系统托盘菜单

trayicon->setContextMenu(trayiconMenu);

//在系统托盘显示气泡消息提示

trayicon->showMessage(tr("hahaya"),tr("托盘测试"),QSystemTrayIcon::Information,5000);

//为系统托盘绑定单击信号的槽即图标激活时

connect(trayicon,SIGNAL(activated(QSystemTrayIcon::ActivationReason)),this,SLOT(onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason)));

4实现槽函数onSystemTrayIconClicked

voidMainWindow::onSystemTrayIconClicked(QSystemTrayIcon::ActivationReasonreason)

{

switch(reason)

{

//单击

caseQSystemTrayIcon::Trigger:

//双击

caseQSystemTrayIcon::DoubleClick:

//恢复窗口显示

this->setWindowState(Qt::WindowActive);

this->show();

break;

default:

break;

}

}

5当点击窗口的关闭按钮时，将程序托盘，则重写类的closeEvent函数

voidMainWindow::closeEvent(QCloseEvent*event)

{

if(trayicon->isVisible())

{

hide();

event->ignore();

}

}

6点击“退出”菜单的槽函数，点击退出时托盘

voidMainWindow::on_action_quit_triggered()

{

this->hide();

this->close();

}

//mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QSystemTrayIcon>
#include <QMenu>
#include <QCloseEvent>
namespace Ui {
  class MainWindow;
}
class MainWindow : public QMainWindow
{
  Q_OBJECT
public:
  explicit MainWindow(QWidget *parent = 0);
  ~MainWindow();
private:

  Ui::MainWindow *ui;
private slots:
  void on_action_quit_triggered();
  void onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason reason);
protected:
  void closeEvent(QCloseEvent *event);
private:
  QSystemTrayIcon *trayicon;
  QMenu *trayiconMenu;
};
#endif // MAINWINDOW_H

//mainwindow.cpp
#include <QtGui>
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
  QMainWindow(parent),
  ui(new Ui::MainWindow)
{
  ui->setupUi(this);
  trayicon = new QSystemTrayIcon(this);
  //创建QIcon对象，参数是图标资源，值为项目的资源文件中图标的地址
  QIcon icon("F:/Windows QT/TrayIcon/bottom.png");
  trayiconMenu = new QMenu(this);
  //为托盘菜单添加菜单项
  trayiconMenu->addAction(ui->action_quit);
  //为托盘菜单添加分隔符
  trayiconMenu->addSeparator();
  //将创建的QIcon对象作为系统托盘图标
  trayicon->setIcon(icon);
  //显示托盘图标
  trayicon->show();
  //设置系统托盘提示
  trayicon->setToolTip(tr("托盘测试"));
  //将创建菜单作为系统托盘菜单
  trayicon->setContextMenu(trayiconMenu);
  //在系统托盘显示气泡消息提示
  trayicon->showMessage(tr("hahaya"), tr("托盘测试"), QSystemTrayIcon::Information, 5000);
  //为系统托盘绑定单击信号的槽 即图标激活时
  connect(trayicon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)), this, SLOT(onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason)));
}
MainWindow::~MainWindow()
{
  delete ui;
}
void MainWindow::onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason reason)
{
  switch(reason)
  {
  //单击
  case QSystemTrayIcon::Trigger:
  //双击
  case QSystemTrayIcon::DoubleClick:
      //恢复窗口显示
      this->setWindowState(Qt::WindowActive);
      this->show();
      break;
  default:
      break;
  }
}
void MainWindow::closeEvent(QCloseEvent *event)
{
  if(trayicon->isVisible())
  {
      hide();
      event->ignore();
  }
}
void MainWindow::on_action_quit_triggered()
{
  this->hide();
  this->close();
}

//main.cpp
#include <QtGui/QApplication>
#include <QTextCodec>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
  QTextCodec::setCodecForTr(QTextCodec::codecForLocale());
  QApplication a(argc, argv);
  MainWindow w;
  w.show();
  return a.exec();
}