Qt最小化到托盘、恢复并置顶

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Qt最小化到托盘、恢复并置顶

在window.h文件中添加如下内容：
//window.h

QSystemTrayIcon *trayicon;
QMenu *trayiconMenu;

//托盘点击处理槽函数
private slots:
void onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason reason);
在window.cpp文件中添加如下内容，在构造函数中对添加的两个变量进行初始化添加托盘图标，链接槽函数，其中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：
//window.cpp

trayicon = new QSystemTrayIcon(this);
connect(trayicon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)), this, SLOT(onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason)));
QIcon icon("MyICO.ico");
trayicon->setIcon(icon);
trayicon->show();

//最小化处理
void Window::changeEvent(QEvent *e)
{
if((e->type()==QEvent::WindowStateChange)&&this->isMinimized())
{
this->hide();
// QTimer::singleShot(100, this, SLOT(close()));
}
}
//实现槽函数
void BluetoothSMS::onSystemTrayIconClicked(QSystemTrayIcon::ActivationReason reason)
{
switch(reason)
{
//单击
case QSystemTrayIcon::Trigger:
//双击
case QSystemTrayIcon::DoubleClick:
if(this->isHidden())
{
//恢复窗口显示
this->show();
//一下两句缺一均不能有效将窗口置顶
this->setWindowState(Qt::WindowActive);
this->activateWindow();
ui->MsgText->setFocus();
}
else
{
this->hide();
}
break;
default:
break;
}
}